227 changed files with 16742 additions and 13806 deletions
--- a/.github/ISSUE_TEMPLATE/bug.md
+++ b/.github/ISSUE_TEMPLATE/bug.md
@ -0,0 +1,21 @@
+---
+name: Bug Report
+about: Report a bug. 
+labels: 'Type: Bug'
+
+---
+
+### What version of nacos-sdk-go are you using?
+
+### What version of nacos-sever are you using?
+
+### What version of Go are you using (`go version`)?
+
+### What operating system (Linux, Windows, …) and version?
+
+### What did you do?
+If possible, provide a recipe for reproducing the error.
+
+### What did you expect to see?
+
+### What did you see instead?
--- a/.github/ISSUE_TEMPLATE/feature.md
+++ b/.github/ISSUE_TEMPLATE/feature.md
@ -0,0 +1,14 @@
+---
+name: Feature Request
+about: Suggest an idea for nacos-sdk-go
+labels: 'Type: Feature'
+
+---
+
+### Use case(s) - what problem will this feature solve?
+
+### Proposed Solution
+
+### Alternatives Considered
+
+### Additional Context
--- a/.github/ISSUE_TEMPLATE/question.md
+++ b/.github/ISSUE_TEMPLATE/question.md
@ -0,0 +1,7 @@
+---
+name: Question
+about: Ask a question about nacos-sdk-go
+labels: 'Type: Question'
+
+---
+
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@ -0,0 +1,38 @@
+name: CI
+
+on:
+  push:
+    branches: "master"
+  pull_request:
+    branches: "*"
+
+jobs:
+
+  build:
+    name: ubuntu-latest ${{ matrix.config.go_version }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        config:
+          - go_version: 1.21
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.config.go_version }}
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Test
+      run: |
+        diff -u <(echo -n) <(gofmt -d -s .)
+        diff -u <(echo -n) <(goimports -d .)
+        go test -v -race ./... -coverprofile=coverage.txt -covermode=atomic
+
+    - name: Coverage
+      run: bash <(curl -s https://codecov.io/bash)
+
+
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,2 @@
+.idea
+.data
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -0,0 +1,10 @@
+### Contribution flow
+
+This is a rough outline of what a contributor's workflow looks like:
+
+* Fork the current repository
+* Create a topic branch from where to base the contribution. This is usually develop.
+* Make commits of logical units.
+* Make sure commit messages are in the proper format (see below).
+* Push changes in a topic branch to your forked repository.
+* Before you sending out the pull request, please sync your forked repository with remote repository, this will make your pull request simple and clear. See guide below:
--- a/Gopkg.lock
+++ b/Gopkg.lock
@ -1,63 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  branch = "master"
-  name = "github.com/buger/jsonparser"
-  packages = ["."]
-  revision = "bf1c66bbce23153d89b23f8960071a680dbef54b"
-
-[[projects]]
-  name = "github.com/davecgh/go-spew"
-  packages = ["spew"]
-  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
-  version = "v1.1.1"
-
-[[projects]]
-  name = "github.com/go-errors/errors"
-  packages = ["."]
-  revision = "a6af135bd4e28680facf08a3d206b454abc877a4"
-  version = "v1.0.1"
-
-[[projects]]
-  name = "github.com/golang/mock"
-  packages = ["gomock"]
-  revision = "9fa652df1129bef0e734c9cf9bf6dbae9ef3b9fa"
-  version = "1.3.1"
-
-[[projects]]
-  name = "github.com/pkg/errors"
-  packages = ["."]
-  revision = "ba968bfe8b2f7e042a574c888954fccecfa385b4"
-  version = "v0.8.1"
-
-[[projects]]
-  name = "github.com/pmezard/go-difflib"
-  packages = ["difflib"]
-  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
-  version = "v1.0.0"
-
-[[projects]]
-  name = "github.com/satori/go.uuid"
-  packages = ["."]
-  revision = "f58768cc1a7a7e77a3bd49e98cdd21419399b6a3"
-  version = "v1.2.0"
-
-[[projects]]
-  name = "github.com/stretchr/testify"
-  packages = ["assert"]
-  revision = "ffdc059bfe9ce6a4e144ba849dbedead332c6053"
-  version = "v1.3.0"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/toolkits/concurrent"
-  packages = ["semaphore"]
-  revision = "a4371d70e3e308db0d5f90c2b1f5efaa84add725"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "40dd585edc77fad2a9636d1fc439a840d18f8eca529eebbabb679d681f4950ed"
-  solver-name = "gps-cdcl"
-  solver-version = 1
--- a/Gopkg.toml
+++ b/Gopkg.toml
@ -1,54 +0,0 @@
-# Gopkg.toml example
-#
-# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
-# for detailed Gopkg.toml documentation.
-#
-# required = ["github.com/user/thing/cmd/thing"]
-# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
-#
-# [[constraint]]
-#   name = "github.com/user/project"
-#   version = "1.0.0"
-#
-# [[constraint]]
-#   name = "github.com/user/project2"
-#   branch = "dev"
-#   source = "github.com/myfork/project2"
-#
-# [[override]]
-#   name = "github.com/x/y"
-#   version = "2.4.0"
-#
-# [prune]
-#   non-go = false
-#   go-tests = true
-#   unused-packages = true
-
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/buger/jsonparser"
-
-[[constraint]]
-  name = "github.com/go-errors/errors"
-  version = "1.0.1"
-
-[[constraint]]
-  name = "github.com/golang/mock"
-  version = "1.3.1"
-
-[[constraint]]
-  name = "github.com/pkg/errors"
-  version = "0.8.1"
-
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "1.3.0"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/toolkits/concurrent"
-
-[prune]
-  go-tests = true
-  unused-packages = true
--- a/vendor/github.com/golang/mock/LICENSE
+++ b/vendor/github.com/golang/mock/LICENSE
@ -1,4 +1,3 @@
-
                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/
--- a/22
+++ b/22
@ -0,0 +1,22 @@
+Nacos-sdk-go
+Copyright 2018-2020
+
+This product includes software developed at
+The Alibaba MiddleWare Group.
+
+The concurrent-map project
+=============
+This product contains code from the concurrent-map project:
+Please visit the concurrent-map github web site for more information:
+https://github.com/orcaman/concurrent-map
+
+Copyright (c) 2014 streamrail
+
+
+The go.uuid project
+=============
+This product contains code from the go.uuid project:
+Please visit the go.uuid github web site for more information:
+https://github.com/satori/go.uuid
+
+Copyright (C) 2013-2018 by Maxim Bublis <b@codemonkey.ru>
--- a/README.md
+++ b/README.md
@ -1,226 +1,411 @@
-## nacos-go
-go语言版本的nacos client，支持服务发现和配置管理
+# Nacos-sdk-go [中文](./README_CN.md) #

-### 客户端配置
+[![Build Status](https://travis-ci.org/nacos-group/nacos-sdk-go.svg?branch=master)](https://travis-ci.org/nacos-group/nacos-sdk-go) [![Go Report Card](https://goreportcard.com/badge/github.com/nacos-group/nacos-sdk-go)](https://goreportcard.com/report/github.com/nacos-group/nacos-sdk-go) ![license](https://img.shields.io/badge/license-Apache--2.0-green.svg)

-* ClientConfig 客户端配置参数 
- 
-```go
-constant.ClientConfig{
-    TimeoutMs:      30 * 1000, //http请求超时时间，单位毫秒
-    ListenInterval: 10 * 1000, //监听间隔时间，单位毫秒（仅在ConfigClient中有效）
-    BeatInterval:   5 * 1000, //心跳间隔时间，单位毫秒（仅在ServiceClient中有效）
-    NamespaceId:       "public", //nacos命名空间
-    Endpoint:          "" //获取nacos节点ip的服务地址
-    CacheDir:         "/data/nacos/cache", //缓存目录
-    LogDIr:         "/data/nacos/log", //日志目录
-    UpdateThreadNum:   20, //更新服务的线程数
-    NotLoadCacheAtStart: true, //在启动时不读取本地缓存数据，true--不读取，false--读取
-    UpdateCacheWhenEmpty: true, //当服务列表为空时是否更新本地缓存，true--更新,false--不更新
-}
+---
+
+## Nacos-sdk-go
+
+Nacos-sdk-go for Go client allows you to access Nacos service,it supports service discovery and dynamic configuration.
+
+## Requirements
+
+Supported Go version over 1.15
+
+Supported Nacos version over 2.x
+
+## Installation
+
+Use `go get` to install SDK：
+
+```sh
+$ go get -u github.com/nacos-group/nacos-sdk-go/v2
 ```

+## Quick Examples

-* ServerConfig nacos服务信息配置参数
+* ClientConfig

 ```go
+
+constant.ClientConfig {
+	TimeoutMs   uint64 // timeout for requesting Nacos server, default value is 10000ms
+	NamespaceId string // the namespaceId of Nacos
+	Endpoint    string // the endpoint for ACM. https://help.aliyun.com/document_detail/130146.html
+	RegionId    string // the regionId for ACM & KMS
+	AccessKey   string // the AccessKey for ACM & KMS
+	SecretKey   string // the SecretKey for ACM & KMS
+	OpenKMS     bool   // it's to open KMS, default is false. https://help.aliyun.com/product/28933.html
+	// , to enable encrypt/decrypt, DataId should be start with "cipher-"
+	CacheDir             string // the directory for persist nacos service info,default value is current path
+	UpdateThreadNum      int    // the number of goroutine for update nacos service info,default value is 20
+	NotLoadCacheAtStart  bool   // not to load persistent nacos service info in CacheDir at start time
+	UpdateCacheWhenEmpty bool   // update cache when get empty service instance from server
+	Username             string // the username for nacos auth
+	Password             string // the password for nacos auth
+	LogDir               string // the directory for log, default is current path
+	RotateTime           string // the rotate time for log, eg: 30m, 1h, 24h, default is 24h
+	MaxAge               int64  // the max age of a log file, default value is 3
+	LogLevel             string // the level of log, it's must be debug,info,warn,error, default value is info
+}
+
+```
+
+* ServerConfig
+
+```go
+
 constant.ServerConfig{
-    IpAddr:      "console.nacos.io", //nacos服务的ip地址 
-    ContextPath: "/nacos", //nacos服务的上下文路径，默认是“/nacos” 
-    Port:        80, //nacos服务端口
-}
-```
-
-<b>注：ServerConfig支持配置多个，在请求出错时，自动切换</b>
-
-### 构造客户端
-
-```go
-// 可以没有，采用默认值
-clientConfig := constant.ClientConfig{
-    TimeoutMs:      30 * 1000,
-    ListenInterval: 10 * 1000,
-    BeatInterval:   5 * 1000,
-    LogDir: "/nacos/logs",
-    CacheDir: "/nacos/cache",
-} 
-
-// 至少一个
-serverConfigs := []constant.ServerConfig{
-    {
-        IpAddr:      "console1.nacos.io",
-        ContextPath: "/nacos",
-        Port:        80,
-    },
-    {
-    	IpAddr:      "console2.nacos.io",
-    	ContextPath: "/nacos",
-    	Port:        80,
-    },
+    Scheme      string // the nacos server scheme,defaut=http,this is not required in 2.0 
+    ContextPath string // the nacos server contextpath,defaut=/nacos,this is not required in 2.0 
+    IpAddr      string // the nacos server address 
+    Port        uint64 // nacos server port
+    GrpcPort    uint64 // nacos server grpc port, default=server port + 1000, this is not required
 }

-namingClient, err := clients.CreateNamingClient(map[string]interface{}{
-	"serverConfigs": serverConfigs,
-	"clientConfig":  clientConfig,
-})
-
-configClient, err := clients.CreateConfigClient(map[string]interface{}{
-	"serverConfigs": serverConfigs,
-	"clientConfig":  clientConfig,
-})
-    
 ```

+<b>Note：We can config multiple ServerConfig,the client will rotate request the servers</b>

-### 服务发现
-    
-* 注册服务实例：RegisterInstance
+### Create client

 ```go

-success, _ := namingClient.RegisterInstance(vo.RegisterInstanceParam{
-    Ip:          "10.0.0.11",
-    Port:        8848,
-    ServiceName: "demo.go",
-    Weight:      10,
-    ClusterName: "a",
-    Enable:      true,
-    Healthy:     true,
-    Ephemeral:   true,
-})
+	//create clientConfig
+	clientConfig := constant.ClientConfig{
+		NamespaceId:         "e525eafa-f7d7-4029-83d9-008937f9d468", //we can create multiple clients with different namespaceId to support multiple namespace.When namespace is public, fill in the blank string here.
+		TimeoutMs:           5000,
+		NotLoadCacheAtStart: true,
+		LogDir:              "/tmp/nacos/log",
+		CacheDir:            "/tmp/nacos/cache",
+		LogLevel:            "debug",
+	}
+	//Another way of create clientConfig
+	clientConfig := *constant.NewClientConfig(
+		constant.WithNamespaceId("e525eafa-f7d7-4029-83d9-008937f9d468"), //When namespace is public, fill in the blank string here.
+		constant.WithTimeoutMs(5000),
+		constant.WithNotLoadCacheAtStart(true),
+		constant.WithLogDir("/tmp/nacos/log"),
+		constant.WithCacheDir("/tmp/nacos/cache"),
+		constant.WithLogLevel("debug"),
+	)
+   // At least one ServerConfig
+	serverConfigs := []constant.ServerConfig{
+		{
+			IpAddr:      "console1.nacos.io",
+			ContextPath: "/nacos",
+			Port:        80,
+			Scheme:      "http",
+		},
+		{
+			IpAddr:      "console2.nacos.io",
+			ContextPath: "/nacos",
+			Port:        80,
+			Scheme:      "http",
+		},
+	}
+	//Another way of create serverConfigs
+	serverConfigs := []constant.ServerConfig{
+		*constant.NewServerConfig(
+			"console1.nacos.io",
+			80,
+			constant.WithScheme("http"),
+			constant.WithContextPath("/nacos")
+		),
+		*constant.NewServerConfig(
+			"console2.nacos.io",
+			80,
+			constant.WithScheme("http"),
+			constant.WithContextPath("/nacos")
+		),
+	}
+
+	// Create naming client for service discovery
+	_, _ := clients.CreateNamingClient(map[string]interface{}{
+		"serverConfigs": serverConfigs,
+		"clientConfig":  clientConfig,
+	})
+
+	// Create config client for dynamic configuration
+	_, _ := clients.CreateConfigClient(map[string]interface{}{
+		"serverConfigs": serverConfigs,
+		"clientConfig":  clientConfig,
+	})
+
+	// Another way of create naming client for service discovery (recommend)
+	namingClient, err := clients.NewNamingClient(
+		vo.NacosClientParam{
+			ClientConfig:  &clientConfig,
+			ServerConfigs: serverConfigs,
+		},
+	)
+
+	// Another way of create config client for dynamic configuration (recommend)
+	configClient, err := clients.NewConfigClient(
+		vo.NacosClientParam{
+			ClientConfig:  &clientConfig,
+			ServerConfigs: serverConfigs,
+		},
+	)

 ```
-  
-* 注销服务实例：DeregisterInstance
+
+### Create client for ACM
+
+https://help.aliyun.com/document_detail/130146.html

 ```go

-success, _ := namingClient.DeregisterInstance(vo.RegisterInstanceParam{
-    Ip:          "10.0.0.11",
-    Port:        8848,
-    ServiceName: "demo.go",
-    ClusterName: "a",
-    Ephemeral:   true,
-})
+cc := constant.ClientConfig{
+		Endpoint:    "acm.aliyun.com:8080",
+		NamespaceId: "e525eafa-f7d7-4029-83d9-008937f9d468",
+		RegionId:    "cn-shanghai",
+		AccessKey:   "LTAI4G8KxxxxxxxxxxxxxbwZLBr",
+		SecretKey:   "n5jTL9YxxxxxxxxxxxxaxmPLZV9",
+		OpenKMS:     true,
+		TimeoutMs:   5000,
+		LogLevel:    "debug",
+	}

+	// a more graceful way to create config client
+	client, err := clients.NewConfigClient(
+		vo.NacosClientParam{
+			ClientConfig: &cc,
+		},
+	)
+   
 ```
-  
-* 获取服务：GetService
+
+### Service Discovery
+
+* Register instance：RegisterInstance

 ```go

-service, _ := namingClient.GetService(vo.GetServiceParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-})
-
+success, err := namingClient.RegisterInstance(vo.RegisterInstanceParam{
+		Ip:          "10.0.0.11",
+		Port:        8848,
+		ServiceName: "demo.go",
+		Weight:      10,
+		Enable:      true,
+		Healthy:     true,
+		Ephemeral:   true,
+		Metadata:    map[string]string{"idc":"shanghai"},
+		ClusterName: "cluster-a", // default value is DEFAULT
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+	})
+   
 ```

-* 获取所有的实例列表：SelectAllInstances
+* Deregister instance：DeregisterInstance

 ```go

-instances, err := namingClient.SelectAllInstances(vo.SelectAllInstancesParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-})
+success, err := namingClient.DeregisterInstance(vo.DeregisterInstanceParam{
+		Ip:          "10.0.0.11",
+		Port:        8848,
+		ServiceName: "demo.go",
+		Ephemeral:   true,
+		Cluster:     "cluster-a", // default value is DEFAULT
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+	})

 ```
- 
-* 获取实例列表：SelectInstances
+
+* Get service：GetService

 ```go

-instances, err := namingClient.SelectInstances(vo.SelectInstancesParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-    HealthyOnly: true,
-})
+services, err := namingClient.GetService(vo.GetServiceParam{
+		ServiceName: "demo.go",
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+	})

 ```

-* 获取一个健康的实例（加权轮训负载均衡）：SelectOneHealthyInstance
+* Get all instances：SelectAllInstances

 ```go

-instance, err := namingClient.SelectOneHealthyInstance(vo.SelectOneHealthInstanceParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-})
+// SelectAllInstance return all instances,include healthy=false,enable=false,weight<=0
+	instances, err := namingClient.SelectAllInstances(vo.SelectAllInstancesParam{
+		ServiceName: "demo.go",
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+	})

 ```

-* 服务监听：Subscribe
+* Get instances ：SelectInstances

 ```go

-namingClient.Subscribe(vo.SubscribeParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-    SubscribeCallback: func(services []model.SubscribeService, err error) {
-        log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
-    },
-})
+// SelectInstances only return the instances of healthy=${HealthyOnly},enable=true and weight>0
+	instances, err := namingClient.SelectInstances(vo.SelectInstancesParam{
+		ServiceName: "demo.go",
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+		HealthyOnly: true,
+	})

 ```

-* 取消服务监听：Unsubscribe
+* Get one healthy instance（WRR）：SelectOneHealthyInstance
+
+```go
+// SelectOneHealthyInstance return one instance by WRR strategy for load balance
+	// And the instance should be health=true,enable=true and weight>0
+	instance, err := namingClient.SelectOneHealthyInstance(vo.SelectOneHealthInstanceParam{
+		ServiceName: "demo.go",
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+	})
+
+```
+
+* Listen service change event：Subscribe

 ```go

-namingClient.Unsubscribe(vo.SubscribeParam{
-    ServiceName: "demo.go",
-    Clusters:    []string{"a"},
-    SubscribeCallback: func(services []model.SubscribeService, err error) {
-        log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
-    },
-})
+// Subscribe key = serviceName+groupName+cluster
+	// Note: We call add multiple SubscribeCallback with the same key.
+	err := namingClient.Subscribe(vo.SubscribeParam{
+		ServiceName: "demo.go",
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+		SubscribeCallback: func (services []model.Instance, err error) {
+			log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
+		},
+	})

 ```

-### 配置管理
+* Cancel listen of service change event：Unsubscribe

-* 发布配置：PublishConfig
+```go
+
+err := namingClient.Unsubscribe(vo.SubscribeParam{
+		ServiceName: "demo.go",
+		GroupName:   "group-a", // default value is DEFAULT_GROUP
+		Clusters:    []string{"cluster-a"}, // default value is DEFAULT
+		SubscribeCallback: func (services []model.Instance, err error) {
+			log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
+		},
+	})
+
+```
+
+* Get all services name:GetAllServicesInfo
+
+```go
+
+serviceInfos, err := namingClient.GetAllServicesInfo(vo.GetAllServiceInfoParam{
+		NameSpace: "0e83cc81-9d8c-4bb8-a28a-ff703187543f",
+		PageNo:   1,
+		PageSize: 10,
+	}),
+
+```
+
+### Dynamic configuration
+
+* publish config：PublishConfig

 ```go

 success, err := configClient.PublishConfig(vo.ConfigParam{
-    DataId:  "dataId",
-    Group:   "group",
-    Content: "hello world!222222"})
+		DataId:  "dataId",
+		Group:   "group",
+		Content: "hello world!222222"})

 ```

-* 删除配置：DeleteConfig
+* delete config：DeleteConfig

 ```go

 success, err = configClient.DeleteConfig(vo.ConfigParam{
-    DataId: "dataId",
-    Group:  "group"})
+		DataId: "dataId",
+		Group:  "group"})

 ```

-* 获取配置：GetConfig
+* get config info：GetConfig

 ```go

 content, err := configClient.GetConfig(vo.ConfigParam{
-    DataId: "dataId",
-    Group:  "group"})
+		DataId: "dataId",
+		Group:  "group"})
+

 ```

-* 监听配置：ListenConfig
+* Listen config change event：ListenConfig

 ```go

-configClient.ListenConfig(vo.ConfigParam{
-    DataId: "dataId",
-    Group:  "group",
-    OnChange: func(namespace, group, dataId, data string) {
-        fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
-	},
-})
+err := configClient.ListenConfig(vo.ConfigParam{
+		DataId: "dataId",
+		Group:  "group",
+		OnChange: func (namespace, group, dataId, data string) {
+			fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
+		},
+	})
+
+```
+
+* Cancel the listening of config change event：CancelListenConfig
+
+```go
+
+err := configClient.CancelListenConfig(vo.ConfigParam{
+		DataId: "dataId",
+		Group:  "group",
+	})
+
+```
+
+* Search config: SearchConfig
+
+```go
+configPage, err := configClient.SearchConfig(vo.SearchConfigParam{
+		Search:   "blur",
+		DataId:   "",
+		Group:    "",
+		PageNo:   1,
+		PageSize: 10,
+	})
+```
+
+## Example
+
+We can run example to learn how to use nacos go client.
+
+* [Config Example](./example/config)
+* [Naming Example](./example/service)
+
+## Documentation
+
+You can view the open-api documentation from the [Nacos open-api wepsite](https://nacos.io/en-us/docs/open-api.html).
+
+You can view the full documentation from the [Nacos website](https://nacos.io/en-us/docs/what-is-nacos.html).
+
+## Contributing
+
+Contributors are welcomed to join Nacos-sdk-go project. Please check [CONTRIBUTING.md](./CONTRIBUTING.md) about how to
+contribute to this project.
+
+## Contact
+
+* Join us from DingDing Group(23191211).
+* [Gitter](https://gitter.im/alibaba/nacos): Nacos's IM tool for community messaging, collaboration and discovery.
+* [Twitter](https://twitter.com/nacos2): Follow along for latest nacos news on Twitter.
+* [Weibo](https://weibo.com/u/6574374908): Follow along for latest nacos news on Weibo (Twitter of China version).
+* [Nacos SegmentFault](https://segmentfault.com/t/nacos): Get the latest notice and prompt help from SegmentFault.
+* Email Group:
+    * users-nacos@googlegroups.com: Nacos usage general discussion.
+    * dev-nacos@googlegroups.com: Nacos developer discussion (APIs, feature design, etc).
+    * commits-nacos@googlegroups.com: Commits notice, very high frequency.

-```
--- a/README_CN.md
+++ b/README_CN.md
@ -0,0 +1,389 @@
+# Nacos-sdk-go [English](./README.md) #
+
+[![Build Status](https://travis-ci.org/nacos-group/nacos-sdk-go.svg?branch=master)](https://travis-ci.org/nacos-group/nacos-sdk-go) [![Go Report Card](https://goreportcard.com/badge/github.com/nacos-group/nacos-sdk-go)](https://goreportcard.com/report/github.com/nacos-group/nacos-sdk-go) ![license](https://img.shields.io/badge/license-Apache--2.0-green.svg)
+
+---
+
+## Nacos-sdk-go
+
+Nacos-sdk-go是Nacos的Go语言客户端，它实现了服务发现和动态配置的功能
+
+## 使用限制
+支持Go>=v1.15版本
+
+支持Nacos>2.x版本
+
+## 安装
+使用`go get`安装SDK：
+```sh
+$ go get -u github.com/nacos-group/nacos-sdk-go/v2
+```
+## 快速使用
+* ClientConfig
+
+```go
+constant.ClientConfig{
+	TimeoutMs            uint64 // 请求Nacos服务端的超时时间，默认是10000ms
+	NamespaceId          string // ACM的命名空间Id
+	Endpoint             string // 当使用ACM时，需要该配置. https://help.aliyun.com/document_detail/130146.html
+	RegionId             string // ACM&KMS的regionId，用于配置中心的鉴权
+	AccessKey            string // ACM&KMS的AccessKey，用于配置中心的鉴权
+	SecretKey            string // ACM&KMS的SecretKey，用于配置中心的鉴权
+	OpenKMS              bool   // 是否开启kms，默认不开启，kms可以参考文档 https://help.aliyun.com/product/28933.html
+	                            // 同时DataId必须以"cipher-"作为前缀才会启动加解密逻辑
+	CacheDir             string // 缓存service信息的目录，默认是当前运行目录
+	UpdateThreadNum      int    // 监听service变化的并发数，默认20
+	NotLoadCacheAtStart  bool   // 在启动的时候不读取缓存在CacheDir的service信息
+	UpdateCacheWhenEmpty bool   // 当service返回的实例列表为空时，不更新缓存，用于推空保护
+	Username             string // Nacos服务端的API鉴权Username
+	Password             string // Nacos服务端的API鉴权Password
+	LogDir               string // 日志存储路径
+	RotateTime           string // 日志轮转周期，比如：30m, 1h, 24h, 默认是24h
+	MaxAge               int64  // 日志最大文件数，默认3
+	LogLevel             string // 日志默认级别，值必须是：debug,info,warn,error，默认值是info
+}
+```
+
+* ServerConfig
+
+```go
+constant.ServerConfig{
+	ContextPath string // Nacos的ContextPath，默认/nacos，在2.0中不需要设置
+	IpAddr      string // Nacos的服务地址
+	Port        uint64 // Nacos的服务端口
+	Scheme      string // Nacos的服务地址前缀，默认http，在2.0中不需要设置
+	GrpcPort    uint64 // Nacos的 grpc 服务端口, 默认为 服务端口+1000, 不是必填
+}
+```
+
+<b>Note：我们可以配置多个ServerConfig，客户端会对这些服务端做轮询请求</b>
+
+### Create client
+
+```go
+// 创建clientConfig
+clientConfig := constant.ClientConfig{
+	NamespaceId:         "e525eafa-f7d7-4029-83d9-008937f9d468", // 如果需要支持多namespace，我们可以创建多个client,它们有不同的NamespaceId。当namespace是public时，此处填空字符串。
+	TimeoutMs:           5000,
+	NotLoadCacheAtStart: true,
+	LogDir:              "/tmp/nacos/log",
+	CacheDir:            "/tmp/nacos/cache",
+	LogLevel:            "debug",
+}
+
+// 创建clientConfig的另一种方式
+clientConfig := *constant.NewClientConfig(
+    constant.WithNamespaceId("e525eafa-f7d7-4029-83d9-008937f9d468"), //当namespace是public时，此处填空字符串。
+    constant.WithTimeoutMs(5000),
+    constant.WithNotLoadCacheAtStart(true),
+    constant.WithLogDir("/tmp/nacos/log"),
+    constant.WithCacheDir("/tmp/nacos/cache"),
+    constant.WithLogLevel("debug"),
+)
+
+// 至少一个ServerConfig
+serverConfigs := []constant.ServerConfig{
+    {
+        IpAddr:      "console1.nacos.io",
+        ContextPath: "/nacos",
+        Port:        80,
+        Scheme:      "http",
+    },
+    {
+    	IpAddr:      "console2.nacos.io",
+    	ContextPath: "/nacos",
+    	Port:        80,
+        Scheme:      "http",
+    },
+}
+
+// 创建serverConfig的另一种方式
+serverConfigs := []constant.ServerConfig{
+    *constant.NewServerConfig(
+        "console1.nacos.io",
+        80,
+        constant.WithScheme("http"),
+        constant.WithContextPath("/nacos"),
+    ),
+    *constant.NewServerConfig(
+        "console2.nacos.io",
+        80,
+        constant.WithScheme("http"),
+        constant.WithContextPath("/nacos"),
+    ),
+}
+
+// 创建服务发现客户端
+_, _ := clients.CreateNamingClient(map[string]interface{}{
+	"serverConfigs": serverConfigs,
+	"clientConfig":  clientConfig,
+})
+
+// 创建动态配置客户端
+_, _ := clients.CreateConfigClient(map[string]interface{}{
+	"serverConfigs": serverConfigs,
+	"clientConfig":  clientConfig,
+})
+
+// 创建服务发现客户端的另一种方式 (推荐)
+namingClient, err := clients.NewNamingClient(
+    vo.NacosClientParam{
+        ClientConfig:  &clientConfig,
+        ServerConfigs: serverConfigs,
+    },
+)
+
+// 创建动态配置客户端的另一种方式 (推荐)
+configClient, err := clients.NewConfigClient(
+    vo.NacosClientParam{
+        ClientConfig:  &clientConfig,
+        ServerConfigs: serverConfigs,
+    },
+)
+```
+
+### Create client for ACM
+https://help.aliyun.com/document_detail/130146.html
+
+```go
+cc := constant.ClientConfig{
+  Endpoint:    "acm.aliyun.com:8080",
+  NamespaceId: "e525eafa-f7d7-4029-83d9-008937f9d468",
+  RegionId:    "cn-shanghai",
+  AccessKey:   "LTAI4G8KxxxxxxxxxxxxxbwZLBr",
+  SecretKey:   "n5jTL9YxxxxxxxxxxxxaxmPLZV9",
+  OpenKMS:     true,
+  TimeoutMs:   5000,
+  LogLevel:    "debug",
+}
+
+// a more graceful way to create config client
+client, err := clients.NewConfigClient(
+  vo.NacosClientParam{
+    ClientConfig: &cc,
+  },
+)
+```
+
+
+### 服务发现
+
+* 注册实例：RegisterInstance
+
+```go
+
+success, err := namingClient.RegisterInstance(vo.RegisterInstanceParam{
+    Ip:          "10.0.0.11",
+    Port:        8848,
+    ServiceName: "demo.go",
+    Weight:      10,
+    Enable:      true,
+    Healthy:     true,
+    Ephemeral:   true,
+    Metadata:    map[string]string{"idc":"shanghai"},
+    ClusterName: "cluster-a", // 默认值DEFAULT
+    GroupName:   "group-a",   // 默认值DEFAULT_GROUP
+})
+
+```
+
+* 注销实例：DeregisterInstance
+
+```go
+
+success, err := namingClient.DeregisterInstance(vo.DeregisterInstanceParam{
+    Ip:          "10.0.0.11",
+    Port:        8848,
+    ServiceName: "demo.go",
+    Ephemeral:   true,
+    Cluster:     "cluster-a", // 默认值DEFAULT
+    GroupName:   "group-a",   // 默认值DEFAULT_GROUP
+})
+
+```
+
+* 获取服务信息：GetService
+
+```go
+
+services, err := namingClient.GetService(vo.GetServiceParam{
+    ServiceName: "demo.go",
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+})
+
+```
+
+* 获取所有的实例列表：SelectAllInstances
+
+```go
+// SelectAllInstance可以返回全部实例列表,包括healthy=false,enable=false,weight<=0
+instances, err := namingClient.SelectAllInstances(vo.SelectAllInstancesParam{
+    ServiceName: "demo.go",
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+})
+
+```
+
+* 获取实例列表 ：SelectInstances
+
+```go
+// SelectInstances 只返回满足这些条件的实例列表：healthy=${HealthyOnly},enable=true 和weight>0
+instances, err := namingClient.SelectInstances(vo.SelectInstancesParam{
+    ServiceName: "demo.go",
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+    HealthyOnly: true,
+})
+
+```
+
+* 获取一个健康的实例（加权随机轮询）：SelectOneHealthyInstance
+
+```go
+// SelectOneHealthyInstance将会按加权随机轮询的负载均衡策略返回一个健康的实例
+// 实例必须满足的条件：health=true,enable=true and weight>0
+instance, err := namingClient.SelectOneHealthyInstance(vo.SelectOneHealthInstanceParam{
+    ServiceName: "demo.go",
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+})
+
+```
+
+* 监听服务变化：Subscribe
+
+```go
+
+// Subscribe key=serviceName+groupName+cluster
+// 注意:我们可以在相同的key添加多个SubscribeCallback.
+err := namingClient.Subscribe(vo.SubscribeParam{
+    ServiceName: "demo.go",
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+    SubscribeCallback: func(services []model.Instance, err error) {
+        log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
+    },
+})
+
+```
+
+* 取消服务监听：Unsubscribe
+
+```go
+
+err := namingClient.Unsubscribe(vo.SubscribeParam{
+    ServiceName: "demo.go",
+    GroupName:   "group-a",             // 默认值DEFAULT_GROUP
+    Clusters:    []string{"cluster-a"}, // 默认值DEFAULT
+    SubscribeCallback: func(services []model.Instance, err error) {
+        log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
+    },
+})
+
+```
+
+* 获取服务名列表:GetAllServicesInfo
+```go
+
+serviceInfos, err := namingClient.GetAllServicesInfo(vo.GetAllServiceInfoParam{
+    NameSpace: "0e83cc81-9d8c-4bb8-a28a-ff703187543f",
+    PageNo:   1,
+    PageSize: 10,
+	}),
+
+```
+
+### 动态配置
+
+* 发布配置：PublishConfig
+
+```go
+
+success, err := configClient.PublishConfig(vo.ConfigParam{
+    DataId:  "dataId",
+    Group:   "group",
+    Content: "hello world!222222"})
+
+```
+
+* 删除配置：DeleteConfig
+
+```go
+
+success, err = configClient.DeleteConfig(vo.ConfigParam{
+    DataId: "dataId",
+    Group:  "group"})
+
+```
+
+* 获取配置：GetConfig
+
+```go
+
+content, err := configClient.GetConfig(vo.ConfigParam{
+    DataId: "dataId",
+    Group:  "group"})
+
+```
+
+* 监听配置变化：ListenConfig
+
+```go
+
+err := configClient.ListenConfig(vo.ConfigParam{
+    DataId: "dataId",
+    Group:  "group",
+    OnChange: func(namespace, group, dataId, data string) {
+        fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
+	},
+})
+
+```
+* 取消配置监听：CancelListenConfig
+
+```go
+
+err := configClient.CancelListenConfig(vo.ConfigParam{
+    DataId: "dataId",
+    Group:  "group",
+})
+
+```
+
+* 搜索配置: SearchConfig
+```go
+configPage,err := configClient.SearchConfig(vo.SearchConfigParam{
+    Search:   "blur",
+    DataId:   "",
+    Group:    "",
+    PageNo:   1,
+    PageSize: 10,
+})
+```
+## 例子
+我们能从示例中学习如何使用Nacos go客户端
+* [动态配置示例](./example/config)
+* [服务发现示例](./example/service)
+
+## 文档
+Nacos open-api相关信息可以查看文档 [Nacos open-api wepsite](https://nacos.io/en-us/docs/open-api.html).
+
+Nacos产品了解可以查看 [Nacos website](https://nacos.io/en-us/docs/what-is-nacos.html).
+
+## 贡献代码
+我们非常欢迎大家为Nacos-sdk-go贡献代码. 贡献前请查看[CONTRIBUTING.md](./CONTRIBUTING.md)
+
+## 联系我们
+* 加入Nacos-sdk-go钉钉群(23191211).
+* [Gitter](https://gitter.im/alibaba/nacos): Nacos即时聊天工具.
+* [Twitter](https://twitter.com/nacos2): 在Twitter上关注Nacos的最新动态.
+* [Weibo](https://weibo.com/u/6574374908): 在微博上关注Nacos的最新动态.
+* [Nacos SegmentFault](https://segmentfault.com/t/nacos): SegmentFault可以获得最新的推送和帮助.
+* Email Group:
+     * users-nacos@googlegroups.com: Nacos用户讨论组.
+     * dev-nacos@googlegroups.com: Nacos开发者讨论组 (APIs, feature design, etc).
+     * commits-nacos@googlegroups.com: Nacos commit提醒.
+
+
--- a/api/grpc/nacos_grpc_service.pb.go
+++ b/api/grpc/nacos_grpc_service.pb.go
@ -0,0 +1,233 @@
+//
+// Copyright 1999-2020 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.7
+// 	protoc        v5.29.3
+// source: api/proto/nacos_grpc_service.proto
+
+package auto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	anypb "google.golang.org/protobuf/types/known/anypb"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Metadata struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Type          string                 `protobuf:"bytes,3,opt,name=type,proto3" json:"type,omitempty"`
+	ClientIp      string                 `protobuf:"bytes,8,opt,name=clientIp,proto3" json:"clientIp,omitempty"`
+	Headers       map[string]string      `protobuf:"bytes,7,rep,name=headers,proto3" json:"headers,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Metadata) Reset() {
+	*x = Metadata{}
+	mi := &file_api_proto_nacos_grpc_service_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Metadata) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Metadata) ProtoMessage() {}
+
+func (x *Metadata) ProtoReflect() protoreflect.Message {
+	mi := &file_api_proto_nacos_grpc_service_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Metadata.ProtoReflect.Descriptor instead.
+func (*Metadata) Descriptor() ([]byte, []int) {
+	return file_api_proto_nacos_grpc_service_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Metadata) GetType() string {
+	if x != nil {
+		return x.Type
+	}
+	return ""
+}
+
+func (x *Metadata) GetClientIp() string {
+	if x != nil {
+		return x.ClientIp
+	}
+	return ""
+}
+
+func (x *Metadata) GetHeaders() map[string]string {
+	if x != nil {
+		return x.Headers
+	}
+	return nil
+}
+
+type Payload struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Metadata      *Metadata              `protobuf:"bytes,2,opt,name=metadata,proto3" json:"metadata,omitempty"`
+	Body          *anypb.Any             `protobuf:"bytes,3,opt,name=body,proto3" json:"body,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Payload) Reset() {
+	*x = Payload{}
+	mi := &file_api_proto_nacos_grpc_service_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Payload) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Payload) ProtoMessage() {}
+
+func (x *Payload) ProtoReflect() protoreflect.Message {
+	mi := &file_api_proto_nacos_grpc_service_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Payload.ProtoReflect.Descriptor instead.
+func (*Payload) Descriptor() ([]byte, []int) {
+	return file_api_proto_nacos_grpc_service_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Payload) GetMetadata() *Metadata {
+	if x != nil {
+		return x.Metadata
+	}
+	return nil
+}
+
+func (x *Payload) GetBody() *anypb.Any {
+	if x != nil {
+		return x.Body
+	}
+	return nil
+}
+
+var File_api_proto_nacos_grpc_service_proto protoreflect.FileDescriptor
+
+const file_api_proto_nacos_grpc_service_proto_rawDesc = "" +
+	"\n" +
+	"\"api/proto/nacos_grpc_service.proto\x1a\x19google/protobuf/any.proto\"\xa8\x01\n" +
+	"\bMetadata\x12\x12\n" +
+	"\x04type\x18\x03 \x01(\tR\x04type\x12\x1a\n" +
+	"\bclientIp\x18\b \x01(\tR\bclientIp\x120\n" +
+	"\aheaders\x18\a \x03(\v2\x16.Metadata.HeadersEntryR\aheaders\x1a:\n" +
+	"\fHeadersEntry\x12\x10\n" +
+	"\x03key\x18\x01 \x01(\tR\x03key\x12\x14\n" +
+	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01\"Z\n" +
+	"\aPayload\x12%\n" +
+	"\bmetadata\x18\x02 \x01(\v2\t.MetadataR\bmetadata\x12(\n" +
+	"\x04body\x18\x03 \x01(\v2\x14.google.protobuf.AnyR\x04body28\n" +
+	"\rRequestStream\x12'\n" +
+	"\rrequestStream\x12\b.Payload\x1a\b.Payload\"\x000\x012*\n" +
+	"\aRequest\x12\x1f\n" +
+	"\arequest\x12\b.Payload\x1a\b.Payload\"\x002>\n" +
+	"\x0fBiRequestStream\x12+\n" +
+	"\x0frequestBiStream\x12\b.Payload\x1a\b.Payload\"\x00(\x010\x01B^\n" +
+	"\x1fcom.alibaba.nacos.api.grpc.autoP\x01Z9github.com/nacos-group/nacos-sdk-go/v2/api/grpc/auto;autob\x06proto3"
+
+var (
+	file_api_proto_nacos_grpc_service_proto_rawDescOnce sync.Once
+	file_api_proto_nacos_grpc_service_proto_rawDescData []byte
+)
+
+func file_api_proto_nacos_grpc_service_proto_rawDescGZIP() []byte {
+	file_api_proto_nacos_grpc_service_proto_rawDescOnce.Do(func() {
+		file_api_proto_nacos_grpc_service_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_api_proto_nacos_grpc_service_proto_rawDesc), len(file_api_proto_nacos_grpc_service_proto_rawDesc)))
+	})
+	return file_api_proto_nacos_grpc_service_proto_rawDescData
+}
+
+var file_api_proto_nacos_grpc_service_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_api_proto_nacos_grpc_service_proto_goTypes = []any{
+	(*Metadata)(nil),  // 0: Metadata
+	(*Payload)(nil),   // 1: Payload
+	nil,               // 2: Metadata.HeadersEntry
+	(*anypb.Any)(nil), // 3: google.protobuf.Any
+}
+var file_api_proto_nacos_grpc_service_proto_depIdxs = []int32{
+	2, // 0: Metadata.headers:type_name -> Metadata.HeadersEntry
+	0, // 1: Payload.metadata:type_name -> Metadata
+	3, // 2: Payload.body:type_name -> google.protobuf.Any
+	1, // 3: RequestStream.requestStream:input_type -> Payload
+	1, // 4: Request.request:input_type -> Payload
+	1, // 5: BiRequestStream.requestBiStream:input_type -> Payload
+	1, // 6: RequestStream.requestStream:output_type -> Payload
+	1, // 7: Request.request:output_type -> Payload
+	1, // 8: BiRequestStream.requestBiStream:output_type -> Payload
+	6, // [6:9] is the sub-list for method output_type
+	3, // [3:6] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
+}
+
+func init() { file_api_proto_nacos_grpc_service_proto_init() }
+func file_api_proto_nacos_grpc_service_proto_init() {
+	if File_api_proto_nacos_grpc_service_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_api_proto_nacos_grpc_service_proto_rawDesc), len(file_api_proto_nacos_grpc_service_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   3,
+		},
+		GoTypes:           file_api_proto_nacos_grpc_service_proto_goTypes,
+		DependencyIndexes: file_api_proto_nacos_grpc_service_proto_depIdxs,
+		MessageInfos:      file_api_proto_nacos_grpc_service_proto_msgTypes,
+	}.Build()
+	File_api_proto_nacos_grpc_service_proto = out.File
+	file_api_proto_nacos_grpc_service_proto_goTypes = nil
+	file_api_proto_nacos_grpc_service_proto_depIdxs = nil
+}
--- a/api/grpc/nacos_grpc_service_grpc.pb.go
+++ b/api/grpc/nacos_grpc_service_grpc.pb.go
@ -0,0 +1,343 @@
+//
+// Copyright 1999-2020 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.29.3
+// source: api/proto/nacos_grpc_service.proto
+
+package auto
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	RequestStream_RequestStream_FullMethodName = "/RequestStream/requestStream"
+)
+
+// RequestStreamClient is the client API for RequestStream service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type RequestStreamClient interface {
+	// build a streamRequest
+	RequestStream(ctx context.Context, in *Payload, opts ...grpc.CallOption) (grpc.ServerStreamingClient[Payload], error)
+}
+
+type requestStreamClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewRequestStreamClient(cc grpc.ClientConnInterface) RequestStreamClient {
+	return &requestStreamClient{cc}
+}
+
+func (c *requestStreamClient) RequestStream(ctx context.Context, in *Payload, opts ...grpc.CallOption) (grpc.ServerStreamingClient[Payload], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &RequestStream_ServiceDesc.Streams[0], RequestStream_RequestStream_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[Payload, Payload]{ClientStream: stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type RequestStream_RequestStreamClient = grpc.ServerStreamingClient[Payload]
+
+// RequestStreamServer is the server API for RequestStream service.
+// All implementations must embed UnimplementedRequestStreamServer
+// for forward compatibility.
+type RequestStreamServer interface {
+	// build a streamRequest
+	RequestStream(*Payload, grpc.ServerStreamingServer[Payload]) error
+	mustEmbedUnimplementedRequestStreamServer()
+}
+
+// UnimplementedRequestStreamServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedRequestStreamServer struct{}
+
+func (UnimplementedRequestStreamServer) RequestStream(*Payload, grpc.ServerStreamingServer[Payload]) error {
+	return status.Errorf(codes.Unimplemented, "method RequestStream not implemented")
+}
+func (UnimplementedRequestStreamServer) mustEmbedUnimplementedRequestStreamServer() {}
+func (UnimplementedRequestStreamServer) testEmbeddedByValue()                       {}
+
+// UnsafeRequestStreamServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to RequestStreamServer will
+// result in compilation errors.
+type UnsafeRequestStreamServer interface {
+	mustEmbedUnimplementedRequestStreamServer()
+}
+
+func RegisterRequestStreamServer(s grpc.ServiceRegistrar, srv RequestStreamServer) {
+	// If the following call pancis, it indicates UnimplementedRequestStreamServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&RequestStream_ServiceDesc, srv)
+}
+
+func _RequestStream_RequestStream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(Payload)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(RequestStreamServer).RequestStream(m, &grpc.GenericServerStream[Payload, Payload]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type RequestStream_RequestStreamServer = grpc.ServerStreamingServer[Payload]
+
+// RequestStream_ServiceDesc is the grpc.ServiceDesc for RequestStream service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var RequestStream_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "RequestStream",
+	HandlerType: (*RequestStreamServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "requestStream",
+			Handler:       _RequestStream_RequestStream_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "api/proto/nacos_grpc_service.proto",
+}
+
+const (
+	Request_Request_FullMethodName = "/Request/request"
+)
+
+// RequestClient is the client API for Request service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type RequestClient interface {
+	// Sends a commonRequest
+	Request(ctx context.Context, in *Payload, opts ...grpc.CallOption) (*Payload, error)
+}
+
+type requestClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewRequestClient(cc grpc.ClientConnInterface) RequestClient {
+	return &requestClient{cc}
+}
+
+func (c *requestClient) Request(ctx context.Context, in *Payload, opts ...grpc.CallOption) (*Payload, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Payload)
+	err := c.cc.Invoke(ctx, Request_Request_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// RequestServer is the server API for Request service.
+// All implementations must embed UnimplementedRequestServer
+// for forward compatibility.
+type RequestServer interface {
+	// Sends a commonRequest
+	Request(context.Context, *Payload) (*Payload, error)
+	mustEmbedUnimplementedRequestServer()
+}
+
+// UnimplementedRequestServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedRequestServer struct{}
+
+func (UnimplementedRequestServer) Request(context.Context, *Payload) (*Payload, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Request not implemented")
+}
+func (UnimplementedRequestServer) mustEmbedUnimplementedRequestServer() {}
+func (UnimplementedRequestServer) testEmbeddedByValue()                 {}
+
+// UnsafeRequestServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to RequestServer will
+// result in compilation errors.
+type UnsafeRequestServer interface {
+	mustEmbedUnimplementedRequestServer()
+}
+
+func RegisterRequestServer(s grpc.ServiceRegistrar, srv RequestServer) {
+	// If the following call pancis, it indicates UnimplementedRequestServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Request_ServiceDesc, srv)
+}
+
+func _Request_Request_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Payload)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RequestServer).Request(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Request_Request_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RequestServer).Request(ctx, req.(*Payload))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Request_ServiceDesc is the grpc.ServiceDesc for Request service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Request_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Request",
+	HandlerType: (*RequestServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "request",
+			Handler:    _Request_Request_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "api/proto/nacos_grpc_service.proto",
+}
+
+const (
+	BiRequestStream_RequestBiStream_FullMethodName = "/BiRequestStream/requestBiStream"
+)
+
+// BiRequestStreamClient is the client API for BiRequestStream service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type BiRequestStreamClient interface {
+	// Sends a commonRequest
+	RequestBiStream(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[Payload, Payload], error)
+}
+
+type biRequestStreamClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewBiRequestStreamClient(cc grpc.ClientConnInterface) BiRequestStreamClient {
+	return &biRequestStreamClient{cc}
+}
+
+func (c *biRequestStreamClient) RequestBiStream(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[Payload, Payload], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &BiRequestStream_ServiceDesc.Streams[0], BiRequestStream_RequestBiStream_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[Payload, Payload]{ClientStream: stream}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type BiRequestStream_RequestBiStreamClient = grpc.BidiStreamingClient[Payload, Payload]
+
+// BiRequestStreamServer is the server API for BiRequestStream service.
+// All implementations must embed UnimplementedBiRequestStreamServer
+// for forward compatibility.
+type BiRequestStreamServer interface {
+	// Sends a commonRequest
+	RequestBiStream(grpc.BidiStreamingServer[Payload, Payload]) error
+	mustEmbedUnimplementedBiRequestStreamServer()
+}
+
+// UnimplementedBiRequestStreamServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedBiRequestStreamServer struct{}
+
+func (UnimplementedBiRequestStreamServer) RequestBiStream(grpc.BidiStreamingServer[Payload, Payload]) error {
+	return status.Errorf(codes.Unimplemented, "method RequestBiStream not implemented")
+}
+func (UnimplementedBiRequestStreamServer) mustEmbedUnimplementedBiRequestStreamServer() {}
+func (UnimplementedBiRequestStreamServer) testEmbeddedByValue()                         {}
+
+// UnsafeBiRequestStreamServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to BiRequestStreamServer will
+// result in compilation errors.
+type UnsafeBiRequestStreamServer interface {
+	mustEmbedUnimplementedBiRequestStreamServer()
+}
+
+func RegisterBiRequestStreamServer(s grpc.ServiceRegistrar, srv BiRequestStreamServer) {
+	// If the following call pancis, it indicates UnimplementedBiRequestStreamServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&BiRequestStream_ServiceDesc, srv)
+}
+
+func _BiRequestStream_RequestBiStream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(BiRequestStreamServer).RequestBiStream(&grpc.GenericServerStream[Payload, Payload]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type BiRequestStream_RequestBiStreamServer = grpc.BidiStreamingServer[Payload, Payload]
+
+// BiRequestStream_ServiceDesc is the grpc.ServiceDesc for BiRequestStream service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var BiRequestStream_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "BiRequestStream",
+	HandlerType: (*BiRequestStreamServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "requestBiStream",
+			Handler:       _BiRequestStream_RequestBiStream_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "api/proto/nacos_grpc_service.proto",
+}
--- a/api/proto/nacos_grpc_service.proto
+++ b/api/proto/nacos_grpc_service.proto
@ -0,0 +1,55 @@
+
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+import "google/protobuf/any.proto";
+
+option java_multiple_files = true;
+option java_package = "com.alibaba.nacos.api.grpc.auto";
+option go_package = "github.com/nacos-group/nacos-sdk-go/v2/api/grpc/auto;auto";
+
+
+message Metadata {
+    string type = 3;
+    string clientIp = 8;
+    map<string, string> headers = 7;
+}
+
+
+message Payload {
+    Metadata metadata = 2;
+    google.protobuf.Any body = 3;
+}
+
+service RequestStream {
+    // build a streamRequest
+    rpc requestStream (Payload) returns (stream Payload) {
+    }
+}
+
+service Request {
+    // Sends a commonRequest
+    rpc request (Payload) returns (Payload) {
+    }
+}
+
+service BiRequestStream {
+    // Sends a commonRequest
+    rpc requestBiStream (stream Payload) returns (stream Payload) {
+    }
+}
--- a/clients/cache/concurrent_map.go
+++ b/clients/cache/concurrent_map.go
@ -1,3 +1,29 @@
+/*
+
+The MIT License (MIT)
+
+Copyright (c) 2014 streamrail
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
 package cache

 import (
@ -270,7 +296,7 @@ func (m ConcurrentMap) Keys() []string {
 	return keys
 }

-//Reviles ConcurrentMap "private" variables to json marshal.
+// Reviles ConcurrentMap "private" variables to json marshal.
 func (m ConcurrentMap) MarshalJSON() ([]byte, error) {
 	// Create a temporary map, which will hold all item spread across shards.
 	tmp := make(map[string]interface{})
--- a/clients/cache/const.go
+++ b/clients/cache/const.go
@ -0,0 +1,11 @@
+package cache
+
+type ConfigCachedFileType string
+
+const (
+	ConfigContent          ConfigCachedFileType = "Config Content"
+	ConfigEncryptedDataKey ConfigCachedFileType = "Config Encrypted Data Key"
+
+	ENCRYPTED_DATA_KEY_FILE_NAME = "encrypted-data-key"
+	FAILOVER_FILE_SUFFIX         = "_failover"
+)
--- a/clients/cache/disk_cache.go
+++ b/clients/cache/disk_cache.go
@ -1,77 +1,203 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cache

 import (
 	"encoding/json"
 	"fmt"
-	"github.com/go-errors/errors"
-	"github.com/nacos-group/nacos-sdk-go/common/util"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"io/ioutil"
-	"log"
 	"os"
 	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/file"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/pkg/errors"
 )

-func GetFileName(cacheKey string, cacheDir string) string {
+var (
+	fileNotExistError = errors.New("file not exist")
+)
+
+func GetFileName(cacheKey, cacheDir string) string {
 	return cacheDir + string(os.PathSeparator) + cacheKey
 }

-func WriteServicesToFile(service model.Service, cacheDir string) {
-	util.MkdirIfNecessary(cacheDir)
-	sb, _ := json.Marshal(service)
-	domFileName := GetFileName(utils.GetServiceCacheKey(service.Name, service.Clusters), cacheDir)
+func GetEncryptedDataKeyDir(cacheDir string) string {
+	return cacheDir + string(os.PathSeparator) + ENCRYPTED_DATA_KEY_FILE_NAME
+}

-	err := ioutil.WriteFile(domFileName, sb, 0666)
+func GetConfigEncryptedDataKeyFileName(cacheKey, cacheDir string) string {
+	return GetEncryptedDataKeyDir(cacheDir) + string(os.PathSeparator) + cacheKey
+}
+
+func GetConfigFailOverContentFileName(cacheKey, cacheDir string) string {
+	return GetFileName(cacheKey, cacheDir) + FAILOVER_FILE_SUFFIX
+}
+
+func GetConfigFailOverEncryptedDataKeyFileName(cacheKey, cacheDir string) string {
+	return GetConfigEncryptedDataKeyFileName(cacheKey, cacheDir) + FAILOVER_FILE_SUFFIX
+}
+
+func WriteServicesToFile(service *model.Service, cacheKey, cacheDir string) {
+	err := file.MkdirIfNecessary(cacheDir)
 	if err != nil {
-		log.Printf("[ERROR]:faild to write name cache:%s ,value:%s ,err:%s \n", domFileName, string(sb), err.Error())
+		logger.Errorf("mkdir cacheDir failed,cacheDir:%s,err:", cacheDir, err)
+		return
+	}
+	bytes, _ := json.Marshal(service)
+	domFileName := GetFileName(cacheKey, cacheDir)
+	err = os.WriteFile(domFileName, bytes, 0666)
+	if err != nil {
+		logger.Errorf("failed to write name cache:%s ,value:%s ,err:%v", domFileName, string(bytes), err)
 	}
-
 }

 func ReadServicesFromFile(cacheDir string) map[string]model.Service {
-	files, err := ioutil.ReadDir(cacheDir)
+	files, err := os.ReadDir(cacheDir)
 	if err != nil {
-		log.Printf("[ERROR]:read cacheDir:%s failed!err:%s \n", cacheDir, err.Error())
+		logger.Errorf("read cacheDir:%s failed!err:%+v", cacheDir, err)
 		return nil
 	}
 	serviceMap := map[string]model.Service{}
 	for _, f := range files {
 		fileName := GetFileName(f.Name(), cacheDir)
-		b, err := ioutil.ReadFile(fileName)
+		b, err := os.ReadFile(fileName)
 		if err != nil {
-			log.Printf("[ERROR]:failed to read name cache file:%s,err:%s! ", fileName, err.Error())
+			logger.Errorf("failed to read name cache file:%s,err:%v ", fileName, err)
 			continue
 		}

 		s := string(b)
-		service := utils.JsonToService(s)
+		service := util.JsonToService(s)

 		if service == nil {
 			continue
 		}
-
-		serviceMap[f.Name()] = *service
+		cacheKey := util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName), service.Clusters)
+		serviceMap[cacheKey] = *service
 	}

-	log.Printf("finish loading name cache, total: " + strconv.Itoa(len(files)))
+	logger.Infof("finish loading name cache, total: %s", strconv.Itoa(len(files)))
 	return serviceMap
 }

-func WriteConfigToFile(cacheKey string, cacheDir string, content string) {
-	util.MkdirIfNecessary(cacheDir)
-	fileName := GetFileName(cacheKey, cacheDir)
-	err := ioutil.WriteFile(fileName, []byte(content), 0666)
+func WriteConfigToFile(cacheKey string, cacheDir string, content string) error {
+	err := file.MkdirIfNecessary(cacheDir)
 	if err != nil {
-		log.Printf("[ERROR]:faild to write config  cache:%s ,value:%s ,err:%s \n", fileName, string(content), err.Error())
+		errMsg := fmt.Sprintf("make dir failed, dir path %s, err: %v.", cacheDir, err)
+		logger.Error(errMsg)
+		return errors.New(errMsg)
 	}
+	err = writeConfigToFile(GetFileName(cacheKey, cacheDir), content, ConfigContent)
+	if err != nil {
+		logger.Error(err)
+		return err
+	}
+	return nil
+}
+
+func WriteEncryptedDataKeyToFile(cacheKey string, cacheDir string, content string) error {
+	err := file.MkdirIfNecessary(GetEncryptedDataKeyDir(cacheDir))
+	if err != nil {
+		errMsg := fmt.Sprintf("make dir failed, dir path %s, err: %v.", cacheDir, err)
+		logger.Error(errMsg)
+		return errors.New(errMsg)
+	}
+	err = writeConfigToFile(GetConfigEncryptedDataKeyFileName(cacheKey, cacheDir), content, ConfigEncryptedDataKey)
+	if err != nil {
+		logger.Error(err)
+		return err
+	}
+	return nil
+}
+
+func writeConfigToFile(fileName string, content string, fileType ConfigCachedFileType) error {
+	if len(strings.TrimSpace(content)) == 0 {
+		// delete config snapshot
+		if err := os.Remove(fileName); err != nil {
+			if err != syscall.ENOENT {
+				logger.Debug(fmt.Sprintf("no need to delete %s cache file, file path %s, file doesn't exist.", fileType, fileName))
+				return nil
+			}
+			errMsg := fmt.Sprintf("failed to delete %s cache file, file path %s, err:%v", fileType, fileName, err)
+			return errors.New(errMsg)
+		}
+	}
+	err := os.WriteFile(fileName, []byte(content), 0666)
+	if err != nil {
+		errMsg := fmt.Sprintf("failed to write %s cache file, file name: %s, value: %s, err:%v", fileType, fileName, content, err)
+		return errors.New(errMsg)
+	}
+	return nil
+}
+
+func ReadEncryptedDataKeyFromFile(cacheKey string, cacheDir string) (string, error) {
+	content, err := readConfigFromFile(GetConfigEncryptedDataKeyFileName(cacheKey, cacheDir), ConfigEncryptedDataKey)
+	if err != nil {
+		if errors.Is(err, fileNotExistError) {
+			logger.Warn(err)
+			return "", nil
+		}
+	}
+	return content, nil
 }

 func ReadConfigFromFile(cacheKey string, cacheDir string) (string, error) {
-	fileName := GetFileName(cacheKey, cacheDir)
-	b, err := ioutil.ReadFile(fileName)
+	return readConfigFromFile(GetFileName(cacheKey, cacheDir), ConfigEncryptedDataKey)
+}
+
+func readConfigFromFile(fileName string, fileType ConfigCachedFileType) (string, error) {
+	if !file.IsExistFile(fileName) {
+		errMsg := fmt.Sprintf("read cache file %s failed. cause file doesn't exist, file path: %s.", fileType, fileName)
+		return "", errors.Wrap(fileNotExistError, errMsg)
+	}
+	b, err := os.ReadFile(fileName)
 	if err != nil {
-		return "", errors.New(fmt.Sprintf("failed to read config cache file:%s,err:%s! ", fileName, err.Error()))
+		errMsg := fmt.Sprintf("get %s from cache failed, filePath:%s, error:%v ", fileType, fileName, err)
+		return "", errors.New(errMsg)
 	}
 	return string(b), nil
 }
+
+// GetFailover , get failover content
+func GetFailover(key, dir string) string {
+	filePath := GetConfigFailOverContentFileName(key, dir)
+	return getFailOverConfig(filePath, ConfigContent)
+}
+
+func GetFailoverEncryptedDataKey(key, dir string) string {
+	filePath := GetConfigFailOverEncryptedDataKeyFileName(key, dir)
+	return getFailOverConfig(filePath, ConfigEncryptedDataKey)
+}
+
+func getFailOverConfig(filePath string, fileType ConfigCachedFileType) string {
+	if !file.IsExistFile(filePath) {
+		errMsg := fmt.Sprintf("read %s failed. cause file doesn't exist, file path: %s.", fileType, filePath)
+		logger.Warn(errMsg)
+		return ""
+	}
+	logger.Warnf("reading failover %s from path:%s", fileType, filePath)
+	fileContent, err := os.ReadFile(filePath)
+	if err != nil {
+		logger.Errorf("fail to read failover %s from %s", fileType, filePath)
+		return ""
+	}
+	return string(fileContent)
+}
--- a/clients/cache/disk_cache_test.go
+++ b/clients/cache/disk_cache_test.go
@ -0,0 +1,127 @@
+package cache
+
+import (
+	"fmt"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"math/rand"
+	"os"
+	"strconv"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/file"
+)
+
+var (
+	dir   = file.GetCurrentPath()
+	group = "FILE_GROUP"
+	ns    = "chasu"
+)
+
+func TestWriteAndGetConfigToFile(t *testing.T) {
+	dataIdSuffix := strconv.Itoa(rand.Intn(1000))
+	t.Run("write and get config content", func(t *testing.T) {
+		dataId := "config_content" + dataIdSuffix
+		cacheKey := util.GetConfigCacheKey(dataId, group, ns)
+		configContent := "config content"
+
+		err := WriteConfigToFile(cacheKey, dir, "")
+		assert.Nil(t, err)
+
+		configFromFile, err := ReadConfigFromFile(cacheKey, dir)
+		assert.NotNil(t, err)
+		assert.Equal(t, configFromFile, "")
+
+		err = WriteConfigToFile(cacheKey, dir, configContent)
+		assert.Nil(t, err)
+
+		fromFile, err := ReadConfigFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, fromFile, configContent)
+
+		err = WriteConfigToFile(cacheKey, dir, "")
+		assert.Nil(t, err)
+
+		configFromFile, err = ReadConfigFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, configFromFile, "")
+	})
+
+	t.Run("write and get config encryptedDataKey", func(t *testing.T) {
+		dataId := "config_encryptedDataKey" + dataIdSuffix
+		cacheKey := util.GetConfigCacheKey(dataId, group, ns)
+		configContent := "config encrypted data key"
+
+		err := WriteEncryptedDataKeyToFile(cacheKey, dir, "")
+		assert.Nil(t, err)
+
+		configFromFile, err := ReadEncryptedDataKeyFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, configFromFile, "")
+
+		err = WriteEncryptedDataKeyToFile(cacheKey, dir, configContent)
+		assert.Nil(t, err)
+
+		fromFile, err := ReadEncryptedDataKeyFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, fromFile, configContent)
+
+		err = WriteEncryptedDataKeyToFile(cacheKey, dir, "")
+		assert.Nil(t, err)
+
+		configFromFile, err = ReadEncryptedDataKeyFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, configFromFile, "")
+	})
+	t.Run("double write config file", func(t *testing.T) {
+		dataId := "config_encryptedDataKey" + dataIdSuffix
+		cacheKey := util.GetConfigCacheKey(dataId, group, ns)
+		configContent := "config encrypted data key"
+
+		err := WriteConfigToFile(cacheKey, dir, configContent)
+		assert.Nil(t, err)
+
+		err = WriteConfigToFile(cacheKey, dir, configContent)
+		assert.Nil(t, err)
+
+		fromFile, err := ReadConfigFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+		assert.Equal(t, fromFile, configContent)
+	})
+	t.Run("read doesn't existed config file", func(t *testing.T) {
+		dataId := "config_encryptedDataKey" + dataIdSuffix + strconv.Itoa(rand.Intn(1000))
+		cacheKey := util.GetConfigCacheKey(dataId, group, ns)
+
+		_, err := ReadConfigFromFile(cacheKey, dir)
+		assert.NotNil(t, err)
+
+		_, err = ReadEncryptedDataKeyFromFile(cacheKey, dir)
+		assert.Nil(t, err)
+	})
+}
+
+func TestGetFailover(t *testing.T) {
+	cacheKey := "test_failOver"
+	fileContent := "test_failover"
+	t.Run("writeContent", func(t *testing.T) {
+		filepath := dir + string(os.PathSeparator) + cacheKey + "_failover"
+		fmt.Println(filepath)
+		err := writeFileContent(filepath, fileContent)
+		assert.Nil(t, err)
+	})
+	t.Run("getContent", func(t *testing.T) {
+		content := GetFailover(cacheKey, dir)
+		assert.Equal(t, content, fileContent)
+	})
+	t.Run("clearContent", func(t *testing.T) {
+		filepath := dir + string(os.PathSeparator) + cacheKey + "_failover"
+		err := writeFileContent(filepath, "")
+		assert.Nil(t, err)
+	})
+}
+
+// write file content
+func writeFileContent(filepath, content string) error {
+	return os.WriteFile(filepath, []byte(content), 0666)
+}
--- a/clients/client_factory.go
+++ b/clients/client_factory.go
@ -1,79 +1,128 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package clients

 import (
-	"errors"
-	"github.com/nacos-group/nacos-sdk-go/clients/config_client"
-	"github.com/nacos-group/nacos-sdk-go/clients/nacos_client"
-	"github.com/nacos-group/nacos-sdk-go/clients/naming_client"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/config_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/nacos_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
 )

-// 创建配置相关的客户端
-func CreateConfigClient(properties map[string]interface{}) (iClient config_client.IConfigClient,
-	err error) {
-	nacosClient, errSetConfig := setConfig(properties)
-	if errSetConfig != nil {
-		err = errSetConfig
-		return
-	}
-	nacosClient.SetHttpAgent(&http_agent.HttpAgent{})
-	config, errNew := config_client.NewConfigClient(nacosClient)
-	if errNew != nil {
-		err = errNew
-		return
-	}
-	iClient = &config
-	return
+// CreateConfigClient use to create config client
+func CreateConfigClient(properties map[string]interface{}) (iClient config_client.IConfigClient, err error) {
+	param := getConfigParam(properties)
+	return NewConfigClient(param)
 }

-// 创建服务发现相关的客户端
+// CreateNamingClient use to create a nacos naming client
 func CreateNamingClient(properties map[string]interface{}) (iClient naming_client.INamingClient, err error) {
-	nacosClient, errSetConfig := setConfig(properties)
-	if errSetConfig != nil {
-		err = errSetConfig
+	param := getConfigParam(properties)
+	return NewNamingClient(param)
+}
+
+func NewConfigClient(param vo.NacosClientParam) (iClient config_client.IConfigClient, err error) {
+	nacosClient, err := setConfig(param)
+	if err != nil {
 		return
 	}
-	nacosClient.SetHttpAgent(&http_agent.HttpAgent{})
-	naming, errNew := naming_client.NewNamingClient(nacosClient)
-	if errNew != nil {
-		err = errNew
+	config, err := config_client.NewConfigClientWithRamCredentialProvider(nacosClient, param.RamCredentialProvider)
+	if err != nil {
 		return
 	}
-	iClient = &naming
+	iClient = config
 	return
 }

-func setConfig(properties map[string]interface{}) (iClient nacos_client.INacosClient, err error) {
-	client := nacos_client.NacosClient{}
+func NewNamingClient(param vo.NacosClientParam) (iClient naming_client.INamingClient, err error) {
+	nacosClient, err := setConfig(param)
+	if err != nil {
+		return
+	}
+	naming, err := naming_client.NewNamingClientWithRamCredentialProvider(nacosClient, param.RamCredentialProvider)
+	if err != nil {
+		return
+	}
+	iClient = naming
+	return
+}
+
+func getConfigParam(properties map[string]interface{}) (param vo.NacosClientParam) {
+
 	if clientConfigTmp, exist := properties[constant.KEY_CLIENT_CONFIG]; exist {
 		if clientConfig, ok := clientConfigTmp.(constant.ClientConfig); ok {
-			err = client.SetClientConfig(clientConfig)
-			if err != nil {
-				return
-			}
+			param.ClientConfig = &clientConfig
 		}
-	} else {
-		_ = client.SetClientConfig(constant.ClientConfig{
-			TimeoutMs:      30 * 1000,
-			ListenInterval: 10 * 1000,
-			BeatInterval:   5 * 1000,
-		})
 	}
-	// 设置 serverConfig
 	if serverConfigTmp, exist := properties[constant.KEY_SERVER_CONFIGS]; exist {
 		if serverConfigs, ok := serverConfigTmp.([]constant.ServerConfig); ok {
-			err = client.SetServerConfig(serverConfigs)
-			if err != nil {
-				return
-			}
+			param.ServerConfigs = serverConfigs
 		}
-	} else {
-		err = errors.New("server configs not found in properties")
-		return
 	}
-
-	iClient = &client
-
+	return
+}
+
+func setConfig(param vo.NacosClientParam) (iClient nacos_client.INacosClient, err error) {
+	client := &nacos_client.NacosClient{}
+	if param.ClientConfig == nil {
+		// default clientConfig
+		_ = client.SetClientConfig(constant.ClientConfig{
+			TimeoutMs:    10 * 1000,
+			BeatInterval: 5 * 1000,
+		})
+	} else {
+		err = client.SetClientConfig(*param.ClientConfig)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if len(param.ServerConfigs) == 0 {
+		clientConfig, _ := client.GetClientConfig()
+		if len(clientConfig.Endpoint) <= 0 {
+			err = errors.New("server configs not found in properties")
+			return nil, err
+		}
+		_ = client.SetServerConfig(nil)
+	} else {
+		for i := range param.ServerConfigs {
+			if param.ServerConfigs[i].Port == 0 {
+				param.ServerConfigs[i].Port = 8848
+			}
+			if param.ServerConfigs[i].GrpcPort == 0 {
+				param.ServerConfigs[i].GrpcPort = param.ServerConfigs[i].Port + constant.RpcPortOffset
+			}
+		}
+		err = client.SetServerConfig(param.ServerConfigs)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if _, _err := client.GetHttpAgent(); _err != nil {
+		if clientCfg, err := client.GetClientConfig(); err == nil {
+			_ = client.SetHttpAgent(&http_agent.HttpAgent{TlsConfig: clientCfg.TLSCfg})
+		}
+	}
+	iClient = client
 	return
 }
--- a/clients/client_factory_test.go
+++ b/clients/client_factory_test.go
@ -0,0 +1,68 @@
+package clients
+
+import (
+	"net"
+	"reflect"
+	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/stretchr/testify/assert"
+)
+
+func getIntranetIP() string {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return "127.0.0.1"
+	}
+
+	for _, address := range addrs {
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String()
+			}
+		}
+	}
+	return "127.0.0.1"
+}
+
+func TestSetConfigClient(t *testing.T) {
+	ip := getIntranetIP()
+	sc := []constant.ServerConfig{
+		*constant.NewServerConfig(
+			ip,
+			8848,
+		),
+	}
+
+	cc := *constant.NewClientConfig(
+		constant.WithNamespaceId("public"),
+		constant.WithTimeoutMs(5000),
+		constant.WithNotLoadCacheAtStart(true),
+		constant.WithLogDir("/tmp/nacos/log"),
+		constant.WithCacheDir("/tmp/nacos/cache"),
+		constant.WithLogLevel("debug"),
+	)
+
+	t.Run("setConfig_error", func(t *testing.T) {
+		nacosClient, err := setConfig(vo.NacosClientParam{})
+		assert.Nil(t, nacosClient)
+		assert.Equal(t, "server configs not found in properties", err.Error())
+	})
+
+	t.Run("setConfig_normal", func(t *testing.T) {
+		// use map params setConfig
+		param := getConfigParam(map[string]interface{}{
+			"serverConfigs": sc,
+			"clientConfig":  cc,
+		})
+		nacosClientFromMap, err := setConfig(param)
+		assert.Nil(t, err)
+		nacosClientFromStruct, err := setConfig(vo.NacosClientParam{
+			ClientConfig:  &cc,
+			ServerConfigs: sc,
+		})
+		assert.Nil(t, err)
+		assert.True(t, reflect.DeepEqual(nacosClientFromMap, nacosClientFromStruct))
+	})
+}
--- a/clients/config_client/config_client.go
+++ b/clients/config_client/config_client.go
@ -1,330 +1,563 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package config_client

 import (
-	"errors"
-	"github.com/nacos-group/nacos-sdk-go/clients/cache"
-	"github.com/nacos-group/nacos-sdk-go/clients/nacos_client"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/common/logger"
-	"github.com/nacos-group/nacos-sdk-go/common/nacos_error"
-	"github.com/nacos-group/nacos-sdk-go/common/util"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/nacos-group/nacos-sdk-go/vo"
-	"io/ioutil"
-	"log"
-	"net/http"
+	"context"
+	"fmt"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
 	"os"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/nacos_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	nacos_inner_encryption "github.com/nacos-group/nacos-sdk-go/v2/common/encryption"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/filter"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_error"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/inner/uuid"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/pkg/errors"
+)
+
+const (
+	perTaskConfigSize = 3000
+	executorErrDelay  = 5 * time.Second
 )

 type ConfigClient struct {
+	ctx    context.Context
+	cancel context.CancelFunc
 	nacos_client.INacosClient
-	localConfigs   []vo.ConfigParam
-	mutex          sync.Mutex
-	configProxy    ConfigProxy
-	configCacheDir string
+	configFilterChainManager filter.IConfigFilterChain
+	localConfigs             []vo.ConfigParam
+	mutex                    sync.Mutex
+	configProxy              IConfigProxy
+	configCacheDir           string
+	lastAllSyncTime          time.Time
+	cacheMap                 cache.ConcurrentMap
+	uid                      string
+	listenExecute            chan struct{}
+	isClosed                 bool
 }

-func NewConfigClient(nc nacos_client.INacosClient) (ConfigClient, error) {
-	config := ConfigClient{}
+type cacheData struct {
+	isInitializing    bool
+	dataId            string
+	group             string
+	content           string
+	contentType       string
+	encryptedDataKey  string
+	tenant            string
+	cacheDataListener *cacheDataListener
+	md5               string
+	appName           string
+	taskId            int
+	configClient      *ConfigClient
+	isSyncWithServer  bool
+}
+
+type cacheDataListener struct {
+	listener vo.Listener
+	lastMd5  string
+}
+
+func (cacheData *cacheData) executeListener() {
+	cacheData.cacheDataListener.lastMd5 = cacheData.md5
+	cacheData.configClient.cacheMap.Set(util.GetConfigCacheKey(cacheData.dataId, cacheData.group, cacheData.tenant), *cacheData)
+
+	param := &vo.ConfigParam{
+		DataId:           cacheData.dataId,
+		Content:          cacheData.content,
+		EncryptedDataKey: cacheData.encryptedDataKey,
+		UsageType:        vo.ResponseType,
+	}
+	if err := cacheData.configClient.configFilterChainManager.DoFilters(param); err != nil {
+		logger.Errorf("do filters failed ,dataId=%s,group=%s,tenant=%s,err:%+v ", cacheData.dataId,
+			cacheData.group, cacheData.tenant, err)
+		return
+	}
+	decryptedContent := param.Content
+	go cacheData.cacheDataListener.listener(cacheData.tenant, cacheData.group, cacheData.dataId, decryptedContent)
+}
+
+func NewConfigClientWithRamCredentialProvider(nc nacos_client.INacosClient, provider security.RamCredentialProvider) (*ConfigClient, error) {
+	config := &ConfigClient{}
+	config.ctx, config.cancel = context.WithCancel(context.Background())
 	config.INacosClient = nc
 	clientConfig, err := nc.GetClientConfig()
 	if err != nil {
-		return config, err
+		return nil, err
 	}
 	serverConfig, err := nc.GetServerConfig()
 	if err != nil {
-		return config, err
+		return nil, err
 	}
 	httpAgent, err := nc.GetHttpAgent()
 	if err != nil {
-		return config, err
+		return nil, err
 	}
-	err = logger.InitLog(clientConfig.LogDir)
+
+	if err = initLogger(clientConfig); err != nil {
+		return nil, err
+	}
+	clientConfig.CacheDir = clientConfig.CacheDir + string(os.PathSeparator) + "config"
+	config.configCacheDir = clientConfig.CacheDir
+
+	if config.configProxy, err = NewConfigProxyWithRamCredentialProvider(config.ctx, serverConfig, clientConfig, httpAgent, provider); err != nil {
+		return nil, err
+	}
+
+	config.configFilterChainManager = filter.NewConfigFilterChainManager()
+
+	if clientConfig.OpenKMS {
+		kmsEncryptionHandler := nacos_inner_encryption.NewKmsHandler()
+		nacos_inner_encryption.RegisterConfigEncryptionKmsPlugins(kmsEncryptionHandler, clientConfig)
+		encryptionFilter := filter.NewDefaultConfigEncryptionFilter(kmsEncryptionHandler)
+		err := filter.RegisterConfigFilterToChain(config.configFilterChainManager, encryptionFilter)
+		if err != nil {
+			logger.Error(err)
+		}
+	}
+
+	uid, err := uuid.NewV4()
 	if err != nil {
-		return config, err
+		return nil, err
 	}
-	config.configCacheDir = clientConfig.CacheDir + string(os.PathSeparator) + "config"
-	config.configProxy, err = NewConfigProxy(serverConfig, clientConfig, httpAgent)
+
+	config.uid = uid.String()
+	config.cacheMap = cache.NewConcurrentMap()
+	config.listenExecute = make(chan struct{})
+	config.startInternal()
 	return config, err
 }

-func (client *ConfigClient) sync() (clientConfig constant.ClientConfig,
-	serverConfigs []constant.ServerConfig, agent http_agent.IHttpAgent, err error) {
-	clientConfig, err = client.GetClientConfig()
-	if err != nil {
-		log.Println(err, ";do you call client.SetClientConfig()?")
-	}
-	if err == nil {
-		serverConfigs, err = client.GetServerConfig()
-		if err != nil {
-			log.Println(err, ";do you call client.SetServerConfig()?")
-		}
-	}
-	if err == nil {
-		agent, err = client.GetHttpAgent()
-		if err != nil {
-			log.Println(err, ";do you call client.SetHttpAgent()?")
-		}
-	}
-	return
+func NewConfigClient(nc nacos_client.INacosClient) (*ConfigClient, error) {
+	return NewConfigClientWithRamCredentialProvider(nc, nil)
+}
+
+func initLogger(clientConfig constant.ClientConfig) error {
+	return logger.InitLogger(logger.BuildLoggerConfig(clientConfig))
 }

 func (client *ConfigClient) GetConfig(param vo.ConfigParam) (content string, err error) {
+	content, encryptedDataKey, err := client.getConfigInner(param)
+	if err != nil {
+		return "", err
+	}
+	deepCopyParam := param.DeepCopy()
+	deepCopyParam.EncryptedDataKey = encryptedDataKey
+	deepCopyParam.Content = content
+	deepCopyParam.UsageType = vo.ResponseType
+	if err = client.configFilterChainManager.DoFilters(deepCopyParam); err != nil {
+		return "", err
+	}
+	content = deepCopyParam.Content
+	return content, nil
+}
+
+func (client *ConfigClient) getConfigInner(param vo.ConfigParam) (content, encryptedDataKey string, err error) {
 	if len(param.DataId) <= 0 {
 		err = errors.New("[client.GetConfig] param.dataId can not be empty")
+		return "", "", err
 	}
 	if len(param.Group) <= 0 {
-		err = errors.New("[client.GetConfig] param.group can not be empty")
+		param.Group = constant.DEFAULT_GROUP
 	}

 	clientConfig, _ := client.GetClientConfig()
-	cacheKey := utils.GetConfigCacheKey(param.DataId, param.Group, clientConfig.NamespaceId)
-	content, err = client.configProxy.GetConfigProxy(param, clientConfig.NamespaceId)
-	if err != nil {
-		log.Printf("[ERROR] get config from server error:%s ", err.Error())
-		content, err = cache.ReadConfigFromFile(cacheKey, client.configCacheDir)
-		if err != nil {
-			log.Printf("[ERROR] get config from cache  error:%s ", err.Error())
-			return "", errors.New("read config from both server and cache fail")
-		}
-		return content, nil
-	} else {
-		cache.WriteConfigToFile(cacheKey, client.configCacheDir, content)
-		return content, nil
+	cacheKey := util.GetConfigCacheKey(param.DataId, param.Group, clientConfig.NamespaceId)
+	content = cache.GetFailover(cacheKey, client.configCacheDir)
+	if len(content) > 0 {
+		logger.Warnf("%s %s %s is using failover content!", clientConfig.NamespaceId, param.Group, param.DataId)
+		encryptedDataKey = cache.GetFailoverEncryptedDataKey(cacheKey, client.configCacheDir)
+		return content, encryptedDataKey, nil
 	}
+	response, err := client.configProxy.queryConfig(param.DataId, param.Group, clientConfig.NamespaceId,
+		clientConfig.TimeoutMs, false, client)
+	if err != nil {
+		logger.Errorf("get config from server error:%v, dataId=%s, group=%s, namespaceId=%s", err,
+			param.DataId, param.Group, clientConfig.NamespaceId)

+		if clientConfig.DisableUseSnapShot {
+			return "", "", errors.Errorf("get config from remote nacos server fail, and is not allowed to read local file, err:%v", err)
+		}
+
+		cacheContent, cacheErr := cache.ReadConfigFromFile(cacheKey, client.configCacheDir)
+		if cacheErr != nil {
+			return "", "", errors.Errorf("read config from both server and cache fail, err=%v，dataId=%s, group=%s, namespaceId=%s",
+				cacheErr, param.DataId, param.Group, clientConfig.NamespaceId)
+		}
+
+		if !strings.HasPrefix(param.DataId, nacos_inner_encryption.CipherPrefix) {
+			return cacheContent, "", nil
+		}
+		encryptedDataKey, cacheErr = cache.ReadEncryptedDataKeyFromFile(cacheKey, client.configCacheDir)
+		if cacheErr != nil {
+			return "", "", errors.Errorf("read encryptedDataKey from server and cache fail, err=%v，dataId=%s, group=%s, namespaceId=%s",
+				cacheErr, param.DataId, param.Group, clientConfig.NamespaceId)
+		}
+
+		logger.Warnf("read config from cache success, dataId=%s, group=%s, namespaceId=%s", param.DataId, param.Group, clientConfig.NamespaceId)
+		return cacheContent, encryptedDataKey, nil
+	}
+	if response != nil && response.Response != nil && !response.IsSuccess() {
+		return response.Content, response.EncryptedDataKey, errors.New(response.GetMessage())
+	}
+	encryptedDataKey = response.EncryptedDataKey
+	content = response.Content
+	return content, encryptedDataKey, nil
 }

-func (client *ConfigClient) PublishConfig(param vo.ConfigParam) (published bool,
-	err error) {
+func (client *ConfigClient) PublishConfig(param vo.ConfigParam) (published bool, err error) {
 	if len(param.DataId) <= 0 {
 		err = errors.New("[client.PublishConfig] param.dataId can not be empty")
-	}
-	if len(param.Group) <= 0 {
-		err = errors.New("[client.PublishConfig] param.group can not be empty")
+		return
 	}
 	if len(param.Content) <= 0 {
 		err = errors.New("[client.PublishConfig] param.content can not be empty")
+		return
 	}
+
+	if len(param.Group) <= 0 {
+		param.Group = constant.DEFAULT_GROUP
+	}
+
+	param.UsageType = vo.RequestType
+	if err = client.configFilterChainManager.DoFilters(&param); err != nil {
+		return false, err
+	}
+
 	clientConfig, _ := client.GetClientConfig()
-	return client.configProxy.PublishConfigProxy(param, clientConfig.NamespaceId)
+	request := rpc_request.NewConfigPublishRequest(param.Group, param.DataId, clientConfig.NamespaceId, param.Content, param.CasMd5)
+	request.AdditionMap["tag"] = param.Tag
+	request.AdditionMap["config_tags"] = param.ConfigTags
+	request.AdditionMap["appName"] = param.AppName
+	request.AdditionMap["betaIps"] = param.BetaIps
+	request.AdditionMap["type"] = param.Type
+	request.AdditionMap["src_user"] = param.SrcUser
+	request.AdditionMap["encryptedDataKey"] = param.EncryptedDataKey
+	rpcClient := client.configProxy.getRpcClient(client)
+	response, err := client.configProxy.requestProxy(rpcClient, request, constant.DEFAULT_TIMEOUT_MILLS)
+	if err != nil {
+		return false, err
+	}
+	if response != nil {
+		return client.buildResponse(response)
+	}
+	return false, err
 }

-func (client *ConfigClient) DeleteConfig(param vo.ConfigParam) (deleted bool,
-	err error) {
+func (client *ConfigClient) DeleteConfig(param vo.ConfigParam) (deleted bool, err error) {
 	if len(param.DataId) <= 0 {
 		err = errors.New("[client.DeleteConfig] param.dataId can not be empty")
 	}
 	if len(param.Group) <= 0 {
-		err = errors.New("[client.DeleteConfig] param.group can not be empty")
+		param.Group = constant.DEFAULT_GROUP
+	}
+	if err != nil {
+		return false, err
 	}
-
 	clientConfig, _ := client.GetClientConfig()
-	return client.configProxy.DeleteConfigProxy(param, clientConfig.NamespaceId)
+	request := rpc_request.NewConfigRemoveRequest(param.Group, param.DataId, clientConfig.NamespaceId)
+	rpcClient := client.configProxy.getRpcClient(client)
+	response, err := client.configProxy.requestProxy(rpcClient, request, constant.DEFAULT_TIMEOUT_MILLS)
+	if err != nil {
+		return false, err
+	}
+	if response != nil {
+		return client.buildResponse(response)
+	}
+	return false, err
 }

-func (client *ConfigClient) AddConfigToListen(params []vo.ConfigParam) (err error) {
-	client.mutex.Lock()
-	defer client.mutex.Unlock()
-
-	var newParams []vo.ConfigParam
-	// 去掉重复添加的
-	for _, newParam := range params {
-		flag := true
-		for _, param := range client.localConfigs {
-			if param.Group == newParam.Group && param.DataId == newParam.DataId {
-				flag = false
-				break
-			}
-		}
-		if flag {
-			newParams = append(newParams, newParam)
-		}
+// Cancel Listen Config
+func (client *ConfigClient) CancelListenConfig(param vo.ConfigParam) (err error) {
+	clientConfig, err := client.GetClientConfig()
+	if err != nil {
+		logger.Errorf("[checkConfigInfo.GetClientConfig] failed,err:%+v", err)
+		return
 	}
-	client.localConfigs = append(client.localConfigs, newParams...)
-	return
+	client.cacheMap.Remove(util.GetConfigCacheKey(param.DataId, param.Group, clientConfig.NamespaceId))
+	logger.Infof("Cancel listen config DataId:%s Group:%s", param.DataId, param.Group)
+	return err
 }

 func (client *ConfigClient) ListenConfig(param vo.ConfigParam) (err error) {
-	go func() {
-		for {
-			clientConfig, serverConfigs, agent, err := client.sync()
-			// 创建计时器
-			var timer *time.Timer
-			if err == nil {
-				timer = time.NewTimer(time.Duration(clientConfig.ListenInterval) * time.Millisecond)
-			}
-			client.listenConfigTask(clientConfig, serverConfigs, agent, param)
-			<-timer.C
-		}
-	}()
-
-	return nil
-}
-
-func (client *ConfigClient) listenConfigTask(clientConfig constant.ClientConfig,
-	serverConfigs []constant.ServerConfig, agent http_agent.IHttpAgent, param vo.ConfigParam) {
-	var listeningConfigs string
-	// 检查&拼接监听参数
-	client.mutex.Lock()
 	if len(param.DataId) <= 0 {
-		log.Fatalf("[client.ListenConfig] DataId can not be empty")
-		return
+		err = errors.New("[client.ListenConfig] DataId can not be empty")
+		return err
 	}
 	if len(param.Group) <= 0 {
-		log.Fatalf("[client.ListenConfig] Group can not be empty")
-		return
+		err = errors.New("[client.ListenConfig] Group can not be empty")
+		return err
 	}
-	var tenant string
-	if len(clientConfig.NamespaceId) > 0 {
-		tenant = clientConfig.NamespaceId
+	clientConfig, err := client.GetClientConfig()
+	if err != nil {
+		err = errors.New("[checkConfigInfo.GetClientConfig] failed")
+		return err
 	}

-	for _, config := range client.localConfigs {
-		if config.Group == param.Group && config.DataId == param.DataId {
-			param.Content = config.Content
-			break
-		}
-	}
-
-	var md5 string
-	if len(param.Content) > 0 {
-		md5 = util.Md5(param.Content)
-	}
-	listeningConfigs += param.DataId + constant.SPLIT_CONFIG_INNER + param.Group + constant.SPLIT_CONFIG_INNER +
-		md5 + constant.SPLIT_CONFIG_INNER + tenant + constant.SPLIT_CONFIG
-	client.mutex.Unlock()
-
-	// http 请求
-	params := make(map[string]string)
-	params[constant.KEY_LISTEN_CONFIGS] = listeningConfigs
-	var changed string
-	for _, serverConfig := range serverConfigs {
-		path := client.buildBasePath(serverConfig) + "/listener"
-		changedTmp, err := listen(agent, path, clientConfig.TimeoutMs, clientConfig.ListenInterval, params)
-		if err == nil {
-			changed = changedTmp
-			break
-		} else {
-			if _, ok := err.(*nacos_error.NacosError); ok {
-				changed = changedTmp
-				break
-			} else {
-				log.Println("[client.ListenConfig] listen config error:", err.Error())
-			}
-		}
-	}
-
-	if strings.ToLower(strings.Trim(changed, " ")) == "" {
-		log.Println("[client.ListenConfig] no change")
+	key := util.GetConfigCacheKey(param.DataId, param.Group, clientConfig.NamespaceId)
+	var cData cacheData
+	if v, ok := client.cacheMap.Get(key); ok {
+		cData = v.(cacheData)
+		cData.isInitializing = true
 	} else {
-		log.Print("[client.ListenConfig] config changed:" + changed)
-		client.updateLocalConfig(changed, param)
-	}
-}
+		var (
+			content  string
+			md5Str   string
+			innerErr error
+		)
+		if content, innerErr = cache.ReadConfigFromFile(key, client.configCacheDir); innerErr != nil {
+			logger.Warn(innerErr)
+		}
+		encryptedDataKey, _ := cache.ReadEncryptedDataKeyFromFile(key, client.configCacheDir)
+		if len(content) > 0 {
+			md5Str = util.Md5(content)
+		}
+		listener := &cacheDataListener{
+			listener: param.OnChange,
+			lastMd5:  md5Str,
+		}

-func listen(agent http_agent.IHttpAgent, path string,
-	timeoutMs uint64, listenInterval uint64,
-	params map[string]string) (changed string, err error) {
-	header := map[string][]string{
-		"Content-Type":         {"application/x-www-form-urlencoded"},
-		"Long-Pulling-Timeout": {strconv.FormatUint(listenInterval, 10)},
-	}
-	log.Println("[client.ListenConfig] request url:", path, " ;params:", params, " ;header:", header)
-	var response *http.Response
-	response, err = agent.Post(path, header, timeoutMs, params)
-	if err == nil {
-		bytes, errRead := ioutil.ReadAll(response.Body)
-		defer response.Body.Close()
-		if errRead != nil {
-			err = errRead
-		} else {
-			if response.StatusCode == 200 {
-				changed = string(bytes)
-			} else {
-				err = &nacos_error.NacosError{
-					ErrMsg: "[" + strconv.Itoa(response.StatusCode) + "]" + string(bytes),
-				}
-			}
+		cData = cacheData{
+			isInitializing:    true,
+			dataId:            param.DataId,
+			group:             param.Group,
+			tenant:            clientConfig.NamespaceId,
+			content:           content,
+			md5:               md5Str,
+			cacheDataListener: listener,
+			encryptedDataKey:  encryptedDataKey,
+			taskId:            client.cacheMap.Count() / perTaskConfigSize,
+			configClient:      client,
 		}
 	}
+	client.cacheMap.Set(key, cData)
 	return
 }

-func (client *ConfigClient) updateLocalConfig(changed string, param vo.ConfigParam) {
+func (client *ConfigClient) SearchConfig(param vo.SearchConfigParam) (*model.ConfigPage, error) {
+	return client.searchConfigInner(param)
+}
+
+func (client *ConfigClient) CloseClient() {
 	client.mutex.Lock()
 	defer client.mutex.Unlock()
-	changedConfigs := strings.Split(changed, "%01")
-	for _, config := range changedConfigs {
-		attrs := strings.Split(config, "%02")
-		if len(attrs) == 2 {
-			content, err := client.GetConfig(vo.ConfigParam{
-				DataId: attrs[0],
-				Group:  attrs[1],
-			})
-			if err != nil {
-				log.Println("[client.updateLocalConfig] update config failed:", err.Error())
-			} else {
-				client.putLocalConfig(vo.ConfigParam{
-					DataId:  attrs[0],
-					Group:   attrs[1],
-					Content: content,
-				})

-				// call listener:
-				param.OnChange("", attrs[1], attrs[0], content)
-
-			}
-		} else if len(attrs) == 3 {
-			content, err := client.GetConfig(vo.ConfigParam{
-				DataId: attrs[0],
-				Group:  attrs[1],
-			})
-			if err != nil {
-				log.Println("[client.updateLocalConfig] update config failed:", err.Error())
-			} else {
-				client.putLocalConfig(vo.ConfigParam{
-					DataId:  attrs[0],
-					Group:   attrs[1],
-					Content: content,
-				})
-
-				// call listener:
-				param.OnChange(attrs[2], attrs[1], attrs[0], content)
-			}
-		}
+	if client.isClosed {
+		return
 	}
-	log.Println("[client.updateLocalConfig] update config complete")
-	log.Println("[client.localConfig] ", client.localConfigs)
+	client.configProxy.getRpcClient(client).Shutdown()
+	client.cancel()
+	client.isClosed = true
 }

-func (client *ConfigClient) putLocalConfig(config vo.ConfigParam) {
-	if len(config.DataId) > 0 && len(config.Group) > 0 {
-		exist := false
-		for i := 0; i < len(client.localConfigs); i++ {
-			if len(client.localConfigs[i].DataId) > 0 && len(client.localConfigs[i].Group) > 0 &&
-				config.DataId == client.localConfigs[i].DataId && config.Group == client.localConfigs[i].Group {
-				// 本地存在 则更新
-				client.localConfigs[i] = config
-				exist = true
-				break
+func (client *ConfigClient) searchConfigInner(param vo.SearchConfigParam) (*model.ConfigPage, error) {
+	if param.Search != "accurate" && param.Search != "blur" {
+		return nil, errors.New("[client.searchConfigInner] param.search must be accurate or blur")
+	}
+	if param.PageNo <= 0 {
+		param.PageNo = 1
+	}
+	if param.PageSize <= 0 {
+		param.PageSize = 10
+	}
+	clientConfig, _ := client.GetClientConfig()
+	configItems, err := client.configProxy.searchConfigProxy(param, clientConfig.NamespaceId, clientConfig.AccessKey, clientConfig.SecretKey)
+	if err != nil {
+		logger.Errorf("search config from server error:%+v ", err)
+		if _, ok := err.(*nacos_error.NacosError); ok {
+			nacosErr := err.(*nacos_error.NacosError)
+			if nacosErr.ErrorCode() == "404" {
+				return nil, errors.New("config not found")
+			}
+			if nacosErr.ErrorCode() == "403" {
+				return nil, errors.New("get config forbidden")
 			}
 		}
-		if !exist {
-			// 本地不存在 放入
-			client.localConfigs = append(client.localConfigs, config)
-		}
+		return nil, err
 	}
-	log.Println("[client.putLocalConfig] putLocalConfig success")
+	return configItems, nil
 }

-func (client *ConfigClient) buildBasePath(serverConfig constant.ServerConfig) (basePath string) {
-	basePath = "http://" + serverConfig.IpAddr + ":" +
-		strconv.FormatUint(serverConfig.Port, 10) + serverConfig.ContextPath + constant.CONFIG_PATH
-	return
+func (client *ConfigClient) startInternal() {
+	go func() {
+		timer := time.NewTimer(executorErrDelay)
+		defer timer.Stop()
+		for {
+			select {
+			case <-client.listenExecute:
+				client.executeConfigListen()
+			case <-timer.C:
+				client.executeConfigListen()
+			case <-client.ctx.Done():
+				return
+			}
+			timer.Reset(executorErrDelay)
+		}
+	}()
+}
+
+func (client *ConfigClient) executeConfigListen() {
+	var (
+		needAllSync    = time.Since(client.lastAllSyncTime) >= constant.ALL_SYNC_INTERNAL
+		hasChangedKeys = false
+	)
+
+	listenTaskMap := client.buildListenTask(needAllSync)
+	if len(listenTaskMap) == 0 {
+		return
+	}
+
+	for taskId, caches := range listenTaskMap {
+		request := buildConfigBatchListenRequest(caches)
+		rpcClient := client.configProxy.createRpcClient(client.ctx, fmt.Sprintf("%d", taskId), client)
+		iResponse, err := client.configProxy.requestProxy(rpcClient, request, 3000)
+		if err != nil {
+			logger.Warnf("ConfigBatchListenRequest failure, err:%v", err)
+			continue
+		}
+		if iResponse == nil {
+			logger.Warnf("ConfigBatchListenRequest failure, response is nil")
+			continue
+		}
+		if !iResponse.IsSuccess() {
+			logger.Warnf("ConfigBatchListenRequest failure, error code:%d", iResponse.GetErrorCode())
+			continue
+		}
+		response, ok := iResponse.(*rpc_response.ConfigChangeBatchListenResponse)
+		if !ok {
+			continue
+		}
+
+		if len(response.ChangedConfigs) > 0 {
+			hasChangedKeys = true
+		}
+		changeKeys := make(map[string]struct{}, len(response.ChangedConfigs))
+		for _, v := range response.ChangedConfigs {
+			changeKey := util.GetConfigCacheKey(v.DataId, v.Group, v.Tenant)
+			changeKeys[changeKey] = struct{}{}
+			if value, ok := client.cacheMap.Get(changeKey); ok {
+				cData := value.(cacheData)
+				client.refreshContentAndCheck(cData, !cData.isInitializing)
+			}
+		}
+
+		for _, v := range client.cacheMap.Items() {
+			data := v.(cacheData)
+			changeKey := util.GetConfigCacheKey(data.dataId, data.group, data.tenant)
+			if _, ok := changeKeys[changeKey]; !ok {
+				data.isSyncWithServer = true
+				client.cacheMap.Set(changeKey, data)
+				continue
+			}
+			data.isInitializing = true
+			client.cacheMap.Set(changeKey, data)
+		}
+
+	}
+	if needAllSync {
+		client.lastAllSyncTime = time.Now()
+	}
+
+	if hasChangedKeys {
+		client.asyncNotifyListenConfig()
+	}
+	monitor.GetListenConfigCountMonitor().Set(float64(client.cacheMap.Count()))
+}
+
+func buildConfigBatchListenRequest(caches []cacheData) *rpc_request.ConfigBatchListenRequest {
+	request := rpc_request.NewConfigBatchListenRequest(len(caches))
+	for _, cache := range caches {
+		request.ConfigListenContexts = append(request.ConfigListenContexts,
+			model.ConfigListenContext{Group: cache.group, Md5: cache.md5, DataId: cache.dataId, Tenant: cache.tenant})
+	}
+	return request
+}
+
+func (client *ConfigClient) refreshContentAndCheck(cacheData cacheData, notify bool) {
+	configQueryResponse, err := client.configProxy.queryConfig(cacheData.dataId, cacheData.group, cacheData.tenant,
+		constant.DEFAULT_TIMEOUT_MILLS, notify, client)
+	if err != nil {
+		logger.Errorf("refresh content and check md5 fail ,dataId=%s,group=%s,tenant=%s ", cacheData.dataId,
+			cacheData.group, cacheData.tenant)
+		return
+	}
+	if configQueryResponse != nil && configQueryResponse.Response != nil && !configQueryResponse.IsSuccess() {
+		logger.Errorf("refresh cached config from server error:%v, dataId=%s, group=%s", configQueryResponse.GetMessage(),
+			cacheData.dataId, cacheData.group)
+		return
+	}
+	cacheData.content = configQueryResponse.Content
+	cacheData.contentType = configQueryResponse.ContentType
+	cacheData.encryptedDataKey = configQueryResponse.EncryptedDataKey
+	if notify {
+		logger.Infof("[config_rpc_client] [data-received] dataId=%s, group=%s, tenant=%s, md5=%s, content=%s, type=%s",
+			cacheData.dataId, cacheData.group, cacheData.tenant, cacheData.md5,
+			util.TruncateContent(cacheData.content), cacheData.contentType)
+	}
+	cacheData.md5 = util.Md5(cacheData.content)
+	if cacheData.md5 != cacheData.cacheDataListener.lastMd5 {
+		cacheDataPtr := &cacheData
+		cacheDataPtr.executeListener()
+	}
+}
+
+func (client *ConfigClient) buildListenTask(needAllSync bool) map[int][]cacheData {
+	listenTaskMap := make(map[int][]cacheData, 8)
+
+	for _, v := range client.cacheMap.Items() {
+		data, ok := v.(cacheData)
+		if !ok {
+			continue
+		}
+
+		if data.isSyncWithServer {
+			if data.md5 != data.cacheDataListener.lastMd5 {
+				data.executeListener()
+			}
+			if !needAllSync {
+				continue
+			}
+		}
+		listenTaskMap[data.taskId] = append(listenTaskMap[data.taskId], data)
+	}
+	return listenTaskMap
+}
+
+func (client *ConfigClient) asyncNotifyListenConfig() {
+	go func() {
+		client.listenExecute <- struct{}{}
+	}()
+}
+
+func (client *ConfigClient) buildResponse(response rpc_response.IResponse) (bool, error) {
+	if response.IsSuccess() {
+		return response.IsSuccess(), nil
+	}
+	return false, errors.New(response.GetMessage())
 }
--- a/clients/config_client/config_client_interface.go
+++ b/clients/config_client/config_client_interface.go
@ -1,43 +1,70 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package config_client

 import (
-	"github.com/nacos-group/nacos-sdk-go/vo"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-08 10:03
-**/
-
 //go:generate mockgen -destination ../../mock/mock_config_client_interface.go -package mock -source=./config_client_interface.go

 type IConfigClient interface {
-	// 获取配置
+	// GetConfig use to get config from nacos server
 	// dataId  require
 	// group   require
 	// tenant ==>nacos.namespace optional
 	GetConfig(param vo.ConfigParam) (string, error)

-	// 发布配置
+	// PublishConfig use to publish config to nacos server
 	// dataId  require
 	// group   require
 	// content require
 	// tenant ==>nacos.namespace optional
 	PublishConfig(param vo.ConfigParam) (bool, error)

-	// 删除配置
+	// DeleteConfig use to delete config
 	// dataId  require
 	// group   require
 	// tenant ==>nacos.namespace optional
 	DeleteConfig(param vo.ConfigParam) (bool, error)

-	// 监听配置
+	// ListenConfig use to listen config change,it will callback OnChange() when config change
+	// dataId  require
+	// group   require
+	// onchange require
+	// tenant ==>nacos.namespace optional
+	ListenConfig(params vo.ConfigParam) (err error)
+
+	//CancelListenConfig use to cancel listen config change
 	// dataId  require
 	// group   require
 	// tenant ==>nacos.namespace optional
-	ListenConfig(params vo.ConfigParam) (err error)
+	CancelListenConfig(params vo.ConfigParam) (err error)
+
+	// SearchConfig use to search nacos config
+	// search  require search=accurate--精确搜索  search=blur--模糊搜索
+	// group   option
+	// dataId  option
+	// tenant ==>nacos.namespace optional
+	// pageNo  option,default is 1
+	// pageSize option,default is 10
+	SearchConfig(param vo.SearchConfigParam) (*model.ConfigPage, error)
+
+	// CloseClient Close the GRPC client
+	CloseClient()
 }
--- a/clients/config_client/config_client_test.go
+++ b/clients/config_client/config_client_test.go
@ -1,49 +1,64 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package config_client

 import (
-	"fmt"
-	"github.com/golang/mock/gomock"
-	"github.com/nacos-group/nacos-sdk-go/clients/nacos_client"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/mock"
-	"github.com/nacos-group/nacos-sdk-go/vo"
-	"github.com/stretchr/testify/assert"
-	"net/http"
+	"context"
+	"errors"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
 	"testing"
-	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/nacos_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/stretchr/testify/assert"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-16 21:01
-**/
+var serverConfigWithOptions = constant.NewServerConfig("127.0.0.1", 8848)

-var clientConfigTest = constant.ClientConfig{
-	TimeoutMs:      20000,
-	ListenInterval: 10000,
-	BeatInterval:   10000,
-}
+var clientConfigWithOptions = constant.NewClientConfig(
+	constant.WithTimeoutMs(10*1000),
+	constant.WithBeatInterval(2*1000),
+	constant.WithNotLoadCacheAtStart(true),
+	constant.WithAccessKey("LTAxxx"),
+	constant.WithSecretKey("EdPxxx"),
+	constant.WithOpenKMS(true),
+	constant.WithKMSVersion(constant.KMSv1),
+	constant.WithRegionId("cn-hangzhou"),
+)

-var serverConfigTest = constant.ServerConfig{
-	ContextPath: "/nacos",
-	Port:        80,
-	IpAddr:      "console.nacos.io",
-}
+var clientTLsConfigWithOptions = constant.NewClientConfig(
+	constant.WithTimeoutMs(10*1000),
+	constant.WithBeatInterval(2*1000),
+	constant.WithNotLoadCacheAtStart(true),

-var configParamMapTest = map[string]string{
-	"dataId": "dataId",
-	"group":  "group",
-}
-
-var configParamTest = vo.ConfigParam{
-	DataId: "dataId",
-	Group:  "group",
-}
+	/*constant.WithTLS(constant.TLSConfig{
+		Enable:   true,
+		TrustAll: false,
+		CaFile:   "mse-nacos-ca.cer",
+	}),*/
+)

 var localConfigTest = vo.ConfigParam{
 	DataId:  "dataId",
@ -51,136 +66,183 @@ var localConfigTest = vo.ConfigParam{
 	Content: "content",
 }

-var localConfigMapTest = map[string]string{
-	"dataId":  "dataId",
-	"group":   "group",
-	"content": "content",
-}
-
-var headerTest = map[string][]string{
-	"Content-Type": {"application/x-www-form-urlencoded"},
-}
-
-var serverConfigsTest = []constant.ServerConfig{serverConfigTest}
-
-var httpAgentTest = mock.MockIHttpAgent{}
-
-func cretateConfigClientTest() ConfigClient {
+func createConfigClientTest() *ConfigClient {
 	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(&http_agent.HttpAgent{})
+	_ = nc.SetServerConfig([]constant.ServerConfig{*serverConfigWithOptions})
+	_ = nc.SetClientConfig(*clientConfigWithOptions)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
 	client, _ := NewConfigClient(&nc)
+	client.configProxy = &MockConfigProxy{}
 	return client
 }

-func cretateConfigClientHttpTest(mockHttpAgent http_agent.IHttpAgent) ConfigClient {
+func createConfigClientTestTls() *ConfigClient {
 	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockHttpAgent)
+	_ = nc.SetServerConfig([]constant.ServerConfig{*serverConfigWithOptions})
+	_ = nc.SetClientConfig(*clientTLsConfigWithOptions)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
 	client, _ := NewConfigClient(&nc)
+	client.configProxy = &MockConfigProxy{}
 	return client
 }

-// sync
-
-func Test_SyncWithoutClientConfig(t *testing.T) {
-	client := cretateConfigClientTest()
-	_, _, _, err := client.sync()
-	assert.NotNil(t, err)
+func createConfigClientCommon() *ConfigClient {
+	nc := nacos_client.NacosClient{}
+	_ = nc.SetServerConfig([]constant.ServerConfig{*serverConfigWithOptions})
+	_ = nc.SetClientConfig(*clientConfigWithOptions)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
+	client, _ := NewConfigClient(&nc)
+	client.configProxy = &MockConfigProxy{}
+	return client
 }

-func Test_SyncWithoutServerConfig(t *testing.T) {
-	client := cretateConfigClientTest()
-	_ = client.SetClientConfig(clientConfigTest)
-	_, _, _, err := client.sync()
-	assert.NotNil(t, err)
+func createConfigClientForKms() *ConfigClient {
+	nc := nacos_client.NacosClient{}
+	_ = nc.SetServerConfig([]constant.ServerConfig{*serverConfigWithOptions})
+	_ = nc.SetClientConfig(*clientConfigWithOptions)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
+	client, _ := NewConfigClient(&nc)
+	client.configProxy = &MockConfigProxyForUsingLocalDiskCache{}
+	return client
 }

-func Test_SyncWithoutHttpAgent(t *testing.T) {
-	client := cretateConfigClientTest()
-	_ = client.SetServerConfig(serverConfigsTest)
-	_ = client.SetClientConfig(clientConfigTest)
-	_, _, _, err := client.sync()
-	assert.NotNil(t, err)
+type MockConfigProxyForUsingLocalDiskCache struct {
+	MockConfigProxy
 }

-func Test_Sync(t *testing.T) {
-	client := cretateConfigClientTest()
-	_ = client.SetClientConfig(clientConfigTest)
-	_ = client.SetServerConfig(serverConfigsTest)
-	_ = client.SetHttpAgent(&httpAgentTest)
-	_, _, _, err := client.sync()
-	assert.Nil(t, err)
+func (m *MockConfigProxyForUsingLocalDiskCache) queryConfig(dataId, group, tenant string, timeout uint64, notify bool, client *ConfigClient) (*rpc_response.ConfigQueryResponse, error) {
+	return nil, errors.New("mock err for using localCache")
+}
+
+type MockConfigProxy struct {
+}
+
+func (m *MockConfigProxy) queryConfig(dataId, group, tenant string, timeout uint64, notify bool, client *ConfigClient) (*rpc_response.ConfigQueryResponse, error) {
+	cacheKey := util.GetConfigCacheKey(dataId, group, tenant)
+	if IsLimited(cacheKey) {
+		return nil, errors.New("request is limited")
+	}
+	return &rpc_response.ConfigQueryResponse{Content: "hello world", Response: &rpc_response.Response{Success: true}}, nil
+}
+func (m *MockConfigProxy) searchConfigProxy(param vo.SearchConfigParam, tenant, accessKey, secretKey string) (*model.ConfigPage, error) {
+	return &model.ConfigPage{TotalCount: 1}, nil
+}
+func (m *MockConfigProxy) requestProxy(rpcClient *rpc.RpcClient, request rpc_request.IRequest, timeoutMills uint64) (rpc_response.IResponse, error) {
+	return &rpc_response.MockResponse{Response: &rpc_response.Response{Success: true}}, nil
+}
+func (m *MockConfigProxy) createRpcClient(ctx context.Context, taskId string, client *ConfigClient) *rpc.RpcClient {
+	return &rpc.RpcClient{}
+}
+func (m *MockConfigProxy) getRpcClient(client *ConfigClient) *rpc.RpcClient {
+	return &rpc.RpcClient{}
 }

 func Test_GetConfig(t *testing.T) {
-
-	client := cretateConfigClientTest()
+	client := createConfigClientTest()
 	success, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "hello world!222222"})
+		DataId:  localConfigTest.DataId,
+		Group:   localConfigTest.Group,
+		Content: "hello world"})

 	assert.Nil(t, err)
 	assert.True(t, success)

 	content, err := client.GetConfig(vo.ConfigParam{
-		DataId: "dataId",
-		Group:  "group"})
+		DataId: localConfigTest.DataId,
+		Group:  localConfigTest.Group})

 	assert.Nil(t, err)
-	assert.Equal(t, "hello world!222222", content)
+	assert.Equal(t, "hello world", content)
 }

-func Test_GetConfigWithErrorResponse(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodGet),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(configParamMapTest),
-	).Times(3).Return(http_agent.FakeHttpResponse(401, "no auth"), nil)
-	_, err := client.GetConfig(configParamTest)
-	assert.NotNil(t, err)
-}
-
-func Test_GetConfigWithCache(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodGet),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(configParamMapTest),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "content"), nil)
-	content, err := client.GetConfig(configParamTest)
+func Test_SearchConfig(t *testing.T) {
+	client := createConfigClientTest()
+	_, _ = client.PublishConfig(vo.ConfigParam{
+		DataId:  localConfigTest.DataId,
+		Group:   "DEFAULT_GROUP",
+		Content: "hello world"})
+	configPage, err := client.SearchConfig(vo.SearchConfigParam{
+		Search:   "accurate",
+		DataId:   localConfigTest.DataId,
+		Group:    "DEFAULT_GROUP",
+		PageNo:   1,
+		PageSize: 10,
+	})
 	assert.Nil(t, err)
-	assert.Equal(t, "content", content)
-
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodGet),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(configParamMapTest),
-	).Times(3).Return(http_agent.FakeHttpResponse(401, "no auth"), nil)
-	content, err = client.GetConfig(configParamTest)
-	assert.Nil(t, err)
-	assert.Equal(t, "content", content)
+	assert.NotEmpty(t, configPage)
 }

+func Test_GetConfigTls(t *testing.T) {
+	client := createConfigClientTestTls()
+	_, _ = client.PublishConfig(vo.ConfigParam{
+		DataId:  localConfigTest.DataId,
+		Group:   "DEFAULT_GROUP",
+		Content: "hello world"})
+	configPage, err := client.SearchConfig(vo.SearchConfigParam{
+		Search:   "accurate",
+		DataId:   localConfigTest.DataId,
+		Group:    "DEFAULT_GROUP",
+		PageNo:   1,
+		PageSize: 10,
+	})
+	assert.Nil(t, err)
+	assert.NotEmpty(t, configPage)
+
+}
+
+// only using by ak sk for cipher config of aliyun kms
+/*
+func TestPublishAndGetConfigByUsingLocalCache(t *testing.T) {
+	param := vo.ConfigParam{
+		DataId:  "cipher-kms-aes-256-usingCache" + strconv.Itoa(rand.Int()),
+		Group:   "DEFAULT",
+		Content: "content加密&&" + strconv.Itoa(rand.Int()),
+	}
+	t.Run("PublishAndGetConfigByUsingLocalCache", func(t *testing.T) {
+		commonClient := createConfigClientCommon()
+		_, err := commonClient.PublishConfig(param)
+		assert.Nil(t, err)
+
+		time.Sleep(2 * time.Second)
+		configQueryContent, err := commonClient.GetConfig(param)
+		assert.Nil(t, err)
+		assert.Equal(t, param.Content, configQueryContent)
+
+		usingKmsCacheClient := createConfigClientForKms()
+		configQueryContentByUsingCache, err := usingKmsCacheClient.GetConfig(param)
+		assert.Nil(t, err)
+		assert.Equal(t, param.Content, configQueryContentByUsingCache)
+
+		newCipherContent := param.Content + "new"
+		param.Content = newCipherContent
+		err = commonClient.ListenConfig(vo.ConfigParam{
+			DataId: param.DataId,
+			Group:  param.Group,
+			OnChange: func(namespace, group, dataId, data string) {
+				t.Log("origin data: " + newCipherContent + "; new data: " + data)
+				assert.Equal(t, newCipherContent, data)
+			},
+		})
+		assert.Nil(t, err)
+
+		result, err := commonClient.PublishConfig(param)
+		assert.Nil(t, err)
+		assert.True(t, result)
+
+		time.Sleep(2 * time.Second)
+		newContentCommon, err := commonClient.GetConfig(param)
+		assert.Nil(t, err)
+		assert.Equal(t, param.Content, newContentCommon)
+		newContentKms, err := usingKmsCacheClient.GetConfig(param)
+		assert.Nil(t, err)
+		assert.Equal(t, param.Content, newContentKms)
+	})
+}
+*/
+
 // PublishConfig
-
 func Test_PublishConfigWithoutDataId(t *testing.T) {
-	client := cretateConfigClientTest()
+	client := createConfigClientTest()
 	_, err := client.PublishConfig(vo.ConfigParam{
 		DataId:  "",
 		Group:   "group",
@ -189,20 +251,10 @@ func Test_PublishConfigWithoutDataId(t *testing.T) {
 	assert.NotNil(t, err)
 }

-func Test_PublishConfigWithoutGroup(t *testing.T) {
-	client := cretateConfigClientTest()
-	_, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "",
-		Content: "content",
-	})
-	assert.NotNil(t, err)
-}
-
 func Test_PublishConfigWithoutContent(t *testing.T) {
-	client := cretateConfigClientTest()
+	client := createConfigClientTest()
 	_, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
+		DataId:  localConfigTest.DataId,
 		Group:   "group",
 		Content: "",
 	})
@ -211,59 +263,25 @@ func Test_PublishConfigWithoutContent(t *testing.T) {

 func Test_PublishConfig(t *testing.T) {

-	client := cretateConfigClientTest()
+	client := createConfigClientTest()

 	success, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
+		DataId:  localConfigTest.DataId,
 		Group:   "group",
-		Content: "hello world2!"})
+		SrcUser: "nacos-client-go",
+		Content: "hello world"})

 	assert.Nil(t, err)
 	assert.True(t, success)
 }

-func Test_PublishConfigWithErrorResponse(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodPost),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(localConfigMapTest),
-	).Times(3).Return(http_agent.FakeHttpResponse(401, "no auth"), nil)
-	success, err := client.PublishConfig(localConfigTest)
-	assert.NotNil(t, err)
-	assert.True(t, !success)
-}
-
-func Test_PublishConfigWithErrorResponse_200(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodPost),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(localConfigMapTest),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "false"), nil)
-	success, err := client.PublishConfig(localConfigTest)
-	assert.NotNil(t, err)
-	assert.True(t, !success)
-}
-
 // DeleteConfig
-
 func Test_DeleteConfig(t *testing.T) {

-	client := cretateConfigClientTest()
+	client := createConfigClientTest()

 	success, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
+		DataId:  localConfigTest.DataId,
 		Group:   "group",
 		Content: "hello world!"})

@ -271,51 +289,15 @@ func Test_DeleteConfig(t *testing.T) {
 	assert.True(t, success)

 	success, err = client.DeleteConfig(vo.ConfigParam{
-		DataId: "dataId",
+		DataId: localConfigTest.DataId,
 		Group:  "group"})

 	assert.Nil(t, err)
 	assert.True(t, success)
 }

-func Test_DeleteConfigWithErrorResponse_200(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodDelete),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(configParamMapTest),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "false"), nil)
-	success, err := client.DeleteConfig(configParamTest)
-	assert.NotNil(t, err)
-	assert.Equal(t, false, success)
-}
-
-func Test_DeleteConfigWithErrorResponse_401(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-
-	mockHttpAgent.EXPECT().Request(gomock.Eq(http.MethodDelete),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(configParamMapTest),
-	).Times(3).Return(http_agent.FakeHttpResponse(401, "no auth"), nil)
-	success, err := client.DeleteConfig(configParamTest)
-	assert.NotNil(t, err)
-	assert.Equal(t, false, success)
-}
-
 func Test_DeleteConfigWithoutDataId(t *testing.T) {
-	client := cretateConfigClientTest()
+	client := createConfigClientTest()
 	success, err := client.DeleteConfig(vo.ConfigParam{
 		DataId: "",
 		Group:  "group",
@ -324,296 +306,106 @@ func Test_DeleteConfigWithoutDataId(t *testing.T) {
 	assert.Equal(t, false, success)
 }

-func Test_DeleteConfigWithoutGroup(t *testing.T) {
-	client := cretateConfigClientTest()
-	success, err := client.DeleteConfig(vo.ConfigParam{
-		DataId: "dataId",
-		Group:  "",
-	})
-	assert.NotNil(t, err)
-	assert.Equal(t, false, success)
-}
-
-// ListenConfig
-
-func TestListenConfig(t *testing.T) {
-	client := cretateConfigClientTest()
-
-	success, err := client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "hello world!"})
-
-	assert.Nil(t, err)
-	assert.Equal(t, true, success)
-
-	content := ""
-
-	err = client.ListenConfig(vo.ConfigParam{
-		DataId: "dataId",
-		Group:  "group",
-		OnChange: func(namespace, group, dataId, data string) {
-			fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
-			content = data
-		},
-	})
-
-	err = client.ListenConfig(vo.ConfigParam{
-		DataId: "abc",
-		Group:  "DEFAULT_GROUP",
-		OnChange: func(namespace, group, dataId, data string) {
-			fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
-		},
-	})
-
-	time.Sleep(5 * time.Second)
-
-	assert.Equal(t, "hello world!", content)
-
-	success, err = client.PublishConfig(vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "abc"})
-
-	assert.Nil(t, err)
-	assert.Equal(t, true, success)
-
-	time.Sleep(10 * time.Second)
-
-	assert.Equal(t, "abc", content)
-}
-
-// listenConfigTask
-
-func Test_listenConfigTask_NoChange(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client := cretateConfigClientHttpTest(mockHttpAgent)
-	mockHttpAgent.EXPECT().Post(
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs/listener"),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(map[string]string{
-			"Listening-Configs": "dataIdgroup9a0364b9e99bb480dd25e1f0284c8555tenant",
-		}),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, ""), nil)
-
-	changeCount := 0
-	client.listenConfigTask(clientConfigTest, serverConfigsTest, mockHttpAgent, vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "content",
-		OnChange: func(namespace, group, dataId, data string) {
-			changeCount = changeCount + 1
-		}})
-
-	assert.Equal(t, 0, changeCount)
-}
-
-func Test_listenConfigTask_Change_WithTenant(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	client := cretateConfigClientTest()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	mockHttpAgent.EXPECT().Post(
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs/listener"),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(map[string]string{
-			"Listening-Configs": "dataIdgroup9a0364b9e99bb480dd25e1f0284c8555tenant",
-		}),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "dataId%02group%02tenant%01"), nil)
-
-	mockHttpAgent.EXPECT().Get(
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(map[string]string{
-			"dataId": "dataId",
-			"group":  "group",
-			"tenant": "tenant",
-		}),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "content2"), nil)
-
-	_ = client.SetHttpAgent(mockHttpAgent)
-	_ = client.SetClientConfig(clientConfigTest)
-	_ = client.SetServerConfig(serverConfigsTest)
-	configData := ""
-	client.listenConfigTask(clientConfigTest, serverConfigsTest, mockHttpAgent, vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "content",
-		OnChange: func(namespace, group, dataId, data string) {
-			configData = data
-		}})
-
-	assert.Equal(t, "content2", configData)
-}
-
-func Test_listenConfigTask_Change_NoTenant(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	client := cretateConfigClientTest()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	mockHttpAgent.EXPECT().Post(
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs/listener"),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(map[string]string{
-			"Listening-Configs": "dataIdgroup9a0364b9e99bb480dd25e1f0284c8555",
-		}),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "dataId%02group%01"), nil)
-
-	mockHttpAgent.EXPECT().Get(
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/cs/configs"),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(map[string]string{
-			"dataId": "dataId",
-			"group":  "group",
-		}),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, "content2"), nil)
-
-	_ = client.SetHttpAgent(mockHttpAgent)
-	_ = client.SetClientConfig(clientConfigTest)
-	_ = client.SetServerConfig(serverConfigsTest)
-	configData := ""
-	client.listenConfigTask(clientConfigTest, serverConfigsTest, mockHttpAgent, vo.ConfigParam{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "content",
-		OnChange: func(namespace, group, dataId, data string) {
-			configData = data
-		},
-	})
-
-	assert.Equal(t, "content2", configData)
-}
-
-func Test_listenConfigTaskWithoutLocalConfigs(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	client := cretateConfigClientTest()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	client.listenConfigTask(clientConfigTest, serverConfigsTest, mockHttpAgent,
-		vo.ConfigParam{
-			DataId:  "dataId",
-			Group:   "group",
-			Content: "content",
+func TestListen(t *testing.T) {
+	t.Run("TestListenConfig", func(t *testing.T) {
+		client := createConfigClientTest()
+		err := client.ListenConfig(vo.ConfigParam{
+			DataId: localConfigTest.DataId,
+			Group:  localConfigTest.Group,
+			OnChange: func(namespace, group, dataId, data string) {
+			},
 		})
-	//assert.Equal(t, false, client.listening)
+		assert.Nil(t, err)
+	})
+	// ListenConfig no dataId
+	t.Run("TestListenConfigNoDataId", func(t *testing.T) {
+		listenConfigParam := vo.ConfigParam{
+			Group: localConfigTest.Group,
+			OnChange: func(namespace, group, dataId, data string) {
+			},
+		}
+		client := createConfigClientTest()
+		err := client.ListenConfig(listenConfigParam)
+		assert.Error(t, err)
+	})
 }

-// listen
+// CancelListenConfig
+func TestCancelListenConfig(t *testing.T) {
+	//Multiple listeners listen for different configurations, cancel one
+	t.Run("TestMultipleListenersCancelOne", func(t *testing.T) {
+		client := createConfigClientTest()
+		var err error
+		listenConfigParam := vo.ConfigParam{
+			DataId: localConfigTest.DataId,
+			Group:  localConfigTest.Group,
+			OnChange: func(namespace, group, dataId, data string) {
+			},
+		}

-func Test_listen(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	client := cretateConfigClientTest()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	path := "http://console.nacos.io:80/nacos/v1/cs/configs/listener"
-	param := map[string]string{
-		"Listening-Configs": "dataIdgroup9a0364b9e99bb480dd25e1f0284c8555tenant",
+		listenConfigParam1 := vo.ConfigParam{
+			DataId: localConfigTest.DataId + "1",
+			Group:  localConfigTest.Group,
+			OnChange: func(namespace, group, dataId, data string) {
+			},
+		}
+		_ = client.ListenConfig(listenConfigParam)
+
+		_ = client.ListenConfig(listenConfigParam1)
+
+		err = client.CancelListenConfig(listenConfigParam)
+		assert.Nil(t, err)
+	})
+}
+
+type MockAccessKeyCredentialProvider struct {
+	accessKey         string
+	secretKey         string
+	signatureRegionId string
+}
+
+func (provider *MockAccessKeyCredentialProvider) MatchProvider() bool {
+	return true
+}
+
+func (provider *MockAccessKeyCredentialProvider) Init() error {
+	return nil
+}
+
+func (provider *MockAccessKeyCredentialProvider) GetCredentialsForNacosClient() security.RamContext {
+	ramContext := security.RamContext{
+		AccessKey:         provider.accessKey,
+		SecretKey:         provider.secretKey,
+		SignatureRegionId: "",
 	}
-	changedString := "dataId%02group%02tenant%01"
-	mockHttpAgent.EXPECT().Post(
-		gomock.Eq(path),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(param),
-	).Times(1).Return(http_agent.FakeHttpResponse(200, changedString), nil)
-
-	_ = client.SetHttpAgent(mockHttpAgent)
-
-	changed, err := listen(mockHttpAgent, path, clientConfigTest.TimeoutMs, clientConfigTest.ListenInterval, param)
-	assert.Equal(t, changed, changedString)
-	assert.Nil(t, err)
+	return ramContext
 }

-func Test_listenWithErrorResponse_401(t *testing.T) {
-	controller := gomock.NewController(t)
-	defer controller.Finish()
-	client := cretateConfigClientTest()
-	mockHttpAgent := mock.NewMockIHttpAgent(controller)
-	path := "http://console.nacos.io:80/nacos/v1/cs/configs/listener"
-	param := map[string]string{
-		"Listening-Configs": "dataIdgroup9a0364b9e99bb480dd25e1f0284c8555tenant",
+func Test_ConfigClientWithProvider(t *testing.T) {
+	nc := nacos_client.NacosClient{}
+	_ = nc.SetServerConfig([]constant.ServerConfig{*serverConfigWithOptions})
+	clientConfigWithOptions.AccessKey = ""
+	clientConfigWithOptions.SecretKey = ""
+	_ = nc.SetClientConfig(*clientConfigWithOptions)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
+	provider := &MockAccessKeyCredentialProvider{
+		accessKey: "LTAxxx",
+		secretKey: "EdPxxx",
 	}
-	mockHttpAgent.EXPECT().Post(
-		gomock.Eq(path),
-		gomock.AssignableToTypeOf(headerTest),
-		gomock.Eq(clientConfigTest.TimeoutMs),
-		gomock.Eq(param),
-	).Times(1).Return(http_agent.FakeHttpResponse(401, "no auth"), nil)
+	client, _ := NewConfigClientWithRamCredentialProvider(&nc, provider)
+	client.configProxy = &MockConfigProxy{}
+	success, err := client.PublishConfig(vo.ConfigParam{
+		DataId:  localConfigTest.DataId,
+		Group:   localConfigTest.Group,
+		Content: "hello world"})

-	_ = client.SetHttpAgent(mockHttpAgent)
-
-	_, err := listen(mockHttpAgent, path, clientConfigTest.TimeoutMs, clientConfigTest.ListenInterval, param)
-	assert.NotNil(t, err)
-}
-
-// AddConfigToListen
-func Test_AddConfigToListenWithNotListening(t *testing.T) {
-	client := cretateConfigClientTest()
-	configs := []vo.ConfigParam{{
-		DataId:  "dataId",
-		Group:   "group",
-		Content: "content",
-	}}
-	err := client.AddConfigToListen(configs)
-	assert.NotNil(t, err)
-}
-
-func Test_AddConfigToListenWithRepeatAdd(t *testing.T) {
-	client := cretateConfigClientTest()
-	configs := []vo.ConfigParam{{
-		DataId: "dataId",
-		Group:  "group",
-	}}
-	addConfigs := []vo.ConfigParam{{
-		DataId: "dataId",
-		Group:  "group",
-	}, {
-		DataId: "dataId2",
-		Group:  "group",
-	}, {
-		DataId: "dataId3",
-		Group:  "group",
-	}}
-	client.localConfigs = configs
-	err := client.AddConfigToListen(addConfigs)
 	assert.Nil(t, err)
-	assert.Equal(t, addConfigs, client.localConfigs)
-}
+	assert.True(t, success)
+
+	content, err := client.GetConfig(vo.ConfigParam{
+		DataId: localConfigTest.DataId,
+		Group:  localConfigTest.Group})

-func Test_AddConfigToListen(t *testing.T) {
-	client := cretateConfigClientTest()
-	configs := []vo.ConfigParam{{
-		DataId: "dataId",
-		Group:  "group",
-	}}
-	addConfigs := []vo.ConfigParam{
-		{
-			DataId: "dataId2",
-			Group:  "group",
-		}, {
-			DataId: "dataId3",
-			Group:  "group",
-		}}
-	resultConfigs := []vo.ConfigParam{{
-		DataId: "dataId",
-		Group:  "group",
-	}, {
-		DataId: "dataId2",
-		Group:  "group",
-	}, {
-		DataId: "dataId3",
-		Group:  "group",
-	}}
-	client.localConfigs = configs
-	err := client.AddConfigToListen(addConfigs)
 	assert.Nil(t, err)
-	assert.Equal(t, resultConfigs, client.localConfigs)
+	assert.Equal(t, "hello world", content)
 }
--- a/clients/config_client/config_connection_event_listener.go
+++ b/clients/config_client/config_connection_event_listener.go
@ -0,0 +1,64 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config_client
+
+import (
+	"strconv"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+)
+
+type ConfigConnectionEventListener struct {
+	client *ConfigClient
+	taskId string
+}
+
+func NewConfigConnectionEventListener(client *ConfigClient, taskId string) *ConfigConnectionEventListener {
+	return &ConfigConnectionEventListener{
+		client: client,
+		taskId: taskId,
+	}
+}
+
+func (c *ConfigConnectionEventListener) OnConnected() {
+	logger.Info("[ConfigConnectionEventListener] connect to config server for taskId: " + c.taskId)
+	if c.client != nil {
+		c.client.asyncNotifyListenConfig()
+	}
+}
+
+func (c *ConfigConnectionEventListener) OnDisConnect() {
+	logger.Info("[ConfigConnectionEventListener] disconnect from config server for taskId: " + c.taskId)
+
+	if c.client != nil {
+		taskIdInt, err := strconv.Atoi(c.taskId)
+		if err != nil {
+			logger.Errorf("[ConfigConnectionEventListener] parse taskId error: %v", err)
+			return
+		}
+
+		items := c.client.cacheMap.Items()
+		for key, v := range items {
+			if data, ok := v.(cacheData); ok {
+				if data.taskId == taskIdInt {
+					data.isSyncWithServer = false
+					c.client.cacheMap.Set(key, data)
+				}
+			}
+		}
+	}
+}
--- a/clients/config_client/config_connection_event_listener_test.go
+++ b/clients/config_client/config_connection_event_listener_test.go
@ -0,0 +1,192 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config_client
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewConfigConnectionEventListener(t *testing.T) {
+	client := &ConfigClient{}
+	taskId := "123"
+
+	listener := NewConfigConnectionEventListener(client, taskId)
+
+	assert.Equal(t, client, listener.client)
+	assert.Equal(t, taskId, listener.taskId)
+}
+
+func TestOnDisConnectWithMock(t *testing.T) {
+	client := &ConfigClient{
+		cacheMap: cache.NewConcurrentMap(),
+	}
+
+	data1 := cacheData{
+		dataId:           "dataId1",
+		group:            "group1",
+		tenant:           "",
+		taskId:           1,
+		isSyncWithServer: true,
+	}
+
+	data2 := cacheData{
+		dataId:           "dataId2",
+		group:            "group1",
+		tenant:           "",
+		taskId:           1,
+		isSyncWithServer: true,
+	}
+
+	data3 := cacheData{
+		dataId:           "dataId3",
+		group:            "group2",
+		tenant:           "",
+		taskId:           2,
+		isSyncWithServer: true,
+	}
+
+	key1 := util.GetConfigCacheKey(data1.dataId, data1.group, data1.tenant)
+	key2 := util.GetConfigCacheKey(data2.dataId, data2.group, data2.tenant)
+	key3 := util.GetConfigCacheKey(data3.dataId, data3.group, data3.tenant)
+
+	client.cacheMap.Set(key1, data1)
+	client.cacheMap.Set(key2, data2)
+	client.cacheMap.Set(key3, data3)
+
+	listener := NewConfigConnectionEventListener(client, "1")
+
+	listener.OnDisConnect()
+
+	item1, _ := client.cacheMap.Get(key1)
+	item2, _ := client.cacheMap.Get(key2)
+	item3, _ := client.cacheMap.Get(key3)
+
+	updatedData1 := item1.(cacheData)
+	updatedData2 := item2.(cacheData)
+	updatedData3 := item3.(cacheData)
+
+	assert.False(t, updatedData1.isSyncWithServer, "dataId1 should be marked as not sync")
+	assert.False(t, updatedData2.isSyncWithServer, "dataId2 should be marked as not sync")
+	assert.True(t, updatedData3.isSyncWithServer, "dataId3 should be marked as sync")
+}
+
+func TestOnConnectedWithMock(t *testing.T) {
+	listenChan := make(chan struct{}, 1)
+
+	client := &ConfigClient{
+		listenExecute: listenChan,
+	}
+
+	listener := NewConfigConnectionEventListener(client, "1")
+
+	listener.OnConnected()
+
+	time.Sleep(100 * time.Millisecond)
+
+	select {
+	case <-listenChan:
+		assert.True(t, true, "asyncNotifyListenConfig should be called")
+	default:
+		t.Fatalf("asyncNotifyListenConfig should be called but not")
+	}
+}
+
+type MockRpcClientForListener struct {
+	requestCalled rpc_request.IRequest
+}
+
+func (m *MockRpcClientForListener) Request(request rpc_request.IRequest) (rpc_response.IResponse, error) {
+	m.requestCalled = request
+	return &rpc_response.ConfigChangeBatchListenResponse{
+		Response: &rpc_response.Response{
+			ResultCode: 200,
+		},
+		ChangedConfigs: []model.ConfigContext{},
+	}, nil
+}
+
+func TestReconnectionFlow(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	mockRpc := &MockRpcClientForListener{}
+
+	listenChan := make(chan struct{}, 1)
+
+	client := &ConfigClient{
+		ctx:           ctx,
+		configProxy:   &MockConfigProxy{},
+		cacheMap:      cache.NewConcurrentMap(),
+		listenExecute: listenChan,
+	}
+
+	done := make(chan bool)
+	go func() {
+		for {
+			select {
+			case <-listenChan:
+				mockRpc.Request(&rpc_request.ConfigBatchListenRequest{})
+				done <- true
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+
+	data1 := cacheData{
+		dataId:           "dataId1",
+		group:            "group1",
+		tenant:           "",
+		taskId:           1,
+		isSyncWithServer: true,
+	}
+
+	key1 := util.GetConfigCacheKey(data1.dataId, data1.group, data1.tenant)
+	client.cacheMap.Set(key1, data1)
+
+	listener := NewConfigConnectionEventListener(client, "1")
+
+	initialData, _ := client.cacheMap.Get(key1)
+	assert.True(t, initialData.(cacheData).isSyncWithServer, "initial data should be sync with server")
+
+	listener.OnDisConnect()
+
+	afterDisconnectData, _ := client.cacheMap.Get(key1)
+	assert.False(t, afterDisconnectData.(cacheData).isSyncWithServer, "disconnect should set isSyncWithServer to false")
+
+	listener.OnConnected()
+
+	select {
+	case <-done:
+	case <-time.After(1 * time.Second):
+		t.Fatalf("wait for done timeout")
+	}
+
+	assert.NotNil(t, mockRpc.requestCalled, "should call request")
+
+	_, ok := mockRpc.requestCalled.(*rpc_request.ConfigBatchListenRequest)
+	assert.True(t, ok, "should be a ConfigBatchListenRequest")
+}
--- a/clients/config_client/config_proxy.go
+++ b/clients/config_client/config_proxy.go
@ -1,65 +1,232 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package config_client

 import (
-	"errors"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/common/nacos_server"
-	"github.com/nacos-group/nacos-sdk-go/common/util"
-	"github.com/nacos-group/nacos-sdk-go/vo"
+	"context"
+	"encoding/json"
 	"net/http"
-	"strings"
+	"strconv"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/pkg/errors"
 )

 type ConfigProxy struct {
-	nacosServer nacos_server.NacosServer
+	nacosServer  *nacos_server.NacosServer
+	clientConfig constant.ClientConfig
 }

-func NewConfigProxy(serverConfig []constant.ServerConfig, clientConfig constant.ClientConfig, httpAgent http_agent.IHttpAgent) (ConfigProxy, error) {
+func NewConfigProxy(ctx context.Context, serverConfig []constant.ServerConfig, clientConfig constant.ClientConfig, httpAgent http_agent.IHttpAgent) (IConfigProxy, error) {
+	return NewConfigProxyWithRamCredentialProvider(ctx, serverConfig, clientConfig, httpAgent, nil)
+}
+
+func NewConfigProxyWithRamCredentialProvider(ctx context.Context, serverConfig []constant.ServerConfig, clientConfig constant.ClientConfig, httpAgent http_agent.IHttpAgent, provider security.RamCredentialProvider) (IConfigProxy, error) {
 	proxy := ConfigProxy{}
 	var err error
-	proxy.nacosServer, err = nacos_server.NewNacosServer(serverConfig, httpAgent, clientConfig.TimeoutMs, clientConfig.Endpoint)
-	return proxy, err
-
+	proxy.nacosServer, err = nacos_server.NewNacosServerWithRamCredentialProvider(ctx, serverConfig, clientConfig, httpAgent, clientConfig.TimeoutMs, clientConfig.Endpoint, nil, provider)
+	proxy.clientConfig = clientConfig
+	return &proxy, err
 }

-func (cp *ConfigProxy) GetConfigProxy(param vo.ConfigParam, tenant string) (string, error) {
+func (cp *ConfigProxy) requestProxy(rpcClient *rpc.RpcClient, request rpc_request.IRequest, timeoutMills uint64) (rpc_response.IResponse, error) {
+	start := time.Now()
+	cp.nacosServer.InjectSecurityInfo(request.GetHeaders(), security.BuildConfigResourceByRequest(request))
+	cp.injectCommHeader(request.GetHeaders())
+	response, err := rpcClient.Request(request, int64(timeoutMills))
+	monitor.GetConfigRequestMonitor(constant.GRPC, request.GetRequestType(), rpc_response.GetGrpcResponseStatusCode(response)).Observe(float64(time.Now().Nanosecond() - start.Nanosecond()))
+	return response, err
+}
+
+func (cp *ConfigProxy) injectCommHeader(param map[string]string) {
+	now := strconv.FormatInt(util.CurrentMillis(), 10)
+	param[constant.CLIENT_APPNAME_HEADER] = cp.clientConfig.AppName
+	param[constant.CLIENT_REQUEST_TS_HEADER] = now
+	param[constant.CLIENT_REQUEST_TOKEN_HEADER] = util.Md5(now + cp.clientConfig.AppKey)
+	param[constant.EX_CONFIG_INFO] = "true"
+	param[constant.CHARSET_KEY] = "utf-8"
+}
+
+func (cp *ConfigProxy) searchConfigProxy(param vo.SearchConfigParam, tenant, accessKey, secretKey string) (*model.ConfigPage, error) {
 	params := util.TransformObject2Param(param)
 	if len(tenant) > 0 {
 		params["tenant"] = tenant
 	}
-	result, err := cp.nacosServer.ReqApi(constant.CONFIG_PATH, params, http.MethodGet)
-	return result, err
-}
-
-func (cp *ConfigProxy) PublishConfigProxy(param vo.ConfigParam, tenant string) (bool, error) {
-	params := util.TransformObject2Param(param)
-	if len(tenant) > 0 {
-		params["tenant"] = tenant
+	if _, ok := params["group"]; !ok {
+		params["group"] = ""
 	}
-	result, err := cp.nacosServer.ReqApi(constant.CONFIG_PATH, params, http.MethodPost)
+	if _, ok := params["dataId"]; !ok {
+		params["dataId"] = ""
+	}
+	var headers = map[string]string{}
+	var version = "v2"
+	result, err := cp.nacosServer.ReqConfigApi(constant.CONFIG_PATH, params, headers, http.MethodGet, cp.clientConfig.TimeoutMs)
 	if err != nil {
-		return false, errors.New("[client.PublishConfig] publish config failed:" + err.Error())
+		if len(tenant) > 0 {
+			params["namespaceId"] = params["tenant"]
+		}
+		params["groupName"] = params["group"]
+		result, err = cp.nacosServer.ReqConfigApi("/v3/admin/cs/config/list", params, headers, http.MethodGet, cp.clientConfig.TimeoutMs)
+		if err != nil {
+			return nil, err
+		}
+		version = "v3"
 	}
-	if strings.ToLower(strings.Trim(result, " ")) == "true" {
-		return true, nil
+	var configPage model.ConfigPage
+	if version == "v2" {
+		err = json.Unmarshal([]byte(result), &configPage)
 	} else {
-		return false, errors.New("[client.PublishConfig] publish config failed:" + string(result))
+		var configPageResult model.ConfigPageResult
+		err = json.Unmarshal([]byte(result), &configPageResult)
+		configPage = configPageResult.Data
 	}
+	if err != nil {
+		return nil, err
+	}
+	return &configPage, nil
 }

-func (cp *ConfigProxy) DeleteConfigProxy(param vo.ConfigParam, tenant string) (bool, error) {
-	params := util.TransformObject2Param(param)
-	if len(tenant) > 0 {
-		params["tenant"] = tenant
+func (cp *ConfigProxy) queryConfig(dataId, group, tenant string, timeout uint64, notify bool, client *ConfigClient) (*rpc_response.ConfigQueryResponse, error) {
+	if group == "" {
+		group = constant.DEFAULT_GROUP
 	}
-	result, err := cp.nacosServer.ReqApi(constant.CONFIG_PATH, params, http.MethodDelete)
+	configQueryRequest := rpc_request.NewConfigQueryRequest(group, dataId, tenant)
+	configQueryRequest.Headers["notify"] = strconv.FormatBool(notify)
+	cacheKey := util.GetConfigCacheKey(dataId, group, tenant)
+	// use the same key of config file as the limit checker's key
+	if IsLimited(cacheKey) {
+		// return error when check limited
+		return nil, errors.New("ConfigQueryRequest is limited")
+	}
+	iResponse, err := cp.requestProxy(cp.getRpcClient(client), configQueryRequest, timeout)
 	if err != nil {
-		return false, errors.New("[client.DeleteConfig] deleted config failed:" + err.Error())
+		return nil, err
 	}
-	if strings.ToLower(strings.Trim(result, " ")) == "true" {
-		return true, nil
-	} else {
-		return false, errors.New("[client.DeleteConfig] deleted config failed: " + string(result))
+	response, ok := iResponse.(*rpc_response.ConfigQueryResponse)
+	if !ok {
+		return nil, errors.New("ConfigQueryRequest returns type error")
+	}
+	if response.IsSuccess() {
+		cache.WriteConfigToFile(cacheKey, cp.clientConfig.CacheDir, response.Content)
+		cache.WriteEncryptedDataKeyToFile(cacheKey, cp.clientConfig.CacheDir, response.EncryptedDataKey)
+		if response.ContentType == "" {
+			response.ContentType = "text"
+		}
+		return response, nil
+	}
+
+	if response.GetErrorCode() == 300 {
+		cache.WriteConfigToFile(cacheKey, cp.clientConfig.CacheDir, "")
+		cache.WriteEncryptedDataKeyToFile(cacheKey, cp.clientConfig.CacheDir, "")
+		response.SetSuccess(true)
+		return response, nil
+	}
+
+	if response.GetErrorCode() == 400 {
+		logger.Errorf(
+			"[config_rpc_client] [sub-server-error] get server config being modified concurrently, dataId=%s, group=%s, "+
+				"tenant=%s", dataId, group, tenant)
+		return nil, errors.New("data being modified, dataId=" + dataId + ",group=" + group + ",tenant=" + tenant)
+	}
+
+	if response.GetErrorCode() > 0 {
+		logger.Errorf("[config_rpc_client] [sub-server-error]  dataId=%s, group=%s, tenant=%s, code=%+v", dataId, group,
+			tenant, response)
+	}
+	return response, nil
+}
+
+func appName(client *ConfigClient) string {
+	if clientConfig, err := client.GetClientConfig(); err == nil {
+		appName := clientConfig.AppName
+		return appName
+	}
+	return "unknown"
+}
+
+func (cp *ConfigProxy) createRpcClient(ctx context.Context, taskId string, client *ConfigClient) *rpc.RpcClient {
+	labels := map[string]string{
+		constant.LABEL_SOURCE:   constant.LABEL_SOURCE_SDK,
+		constant.LABEL_MODULE:   constant.LABEL_MODULE_CONFIG,
+		constant.APPNAME_HEADER: appName(client),
+		"taskId":                taskId,
+	}
+
+	iRpcClient, _ := rpc.CreateClient(ctx, "config-"+taskId+"-"+client.uid, rpc.GRPC, labels, cp.nacosServer, &cp.clientConfig.TLSCfg, cp.clientConfig.AppConnLabels)
+	rpcClient := iRpcClient.GetRpcClient()
+	if rpcClient.IsInitialized() {
+		rpcClient.RegisterServerRequestHandler(func() rpc_request.IRequest {
+			// TODO fix the group/dataId empty problem
+			return rpc_request.NewConfigChangeNotifyRequest("", "", "")
+		}, &ConfigChangeNotifyRequestHandler{client: client})
+
+		configListener := NewConfigConnectionEventListener(client, taskId)
+		rpcClient.RegisterConnectionListener(configListener)
+
+		rpcClient.Tenant = cp.clientConfig.NamespaceId
+		rpcClient.Start()
+	}
+	return rpcClient
+}
+
+func (cp *ConfigProxy) getRpcClient(client *ConfigClient) *rpc.RpcClient {
+	return cp.createRpcClient(client.ctx, "0", client)
+}
+
+type ConfigChangeNotifyRequestHandler struct {
+	client *ConfigClient
+}
+
+func (c *ConfigChangeNotifyRequestHandler) Name() string {
+	return "ConfigChangeNotifyRequestHandler"
+}
+
+func (c *ConfigChangeNotifyRequestHandler) RequestReply(request rpc_request.IRequest, rpcClient *rpc.RpcClient) rpc_response.IResponse {
+	configChangeNotifyRequest, ok := request.(*rpc_request.ConfigChangeNotifyRequest)
+	if !ok {
+		return nil
+	}
+	logger.Infof("%s [server-push] config changed. dataId=%s, group=%s,tenant=%s", rpcClient.Name(),
+		configChangeNotifyRequest.DataId, configChangeNotifyRequest.Group, configChangeNotifyRequest.Tenant)
+
+	cacheKey := util.GetConfigCacheKey(configChangeNotifyRequest.DataId, configChangeNotifyRequest.Group,
+		configChangeNotifyRequest.Tenant)
+	data, ok := c.client.cacheMap.Get(cacheKey)
+	if !ok {
+		return nil
+	}
+	cData := data.(cacheData)
+	cData.isSyncWithServer = false
+	c.client.cacheMap.Set(cacheKey, cData)
+	c.client.asyncNotifyListenConfig()
+	return &rpc_response.NotifySubscriberResponse{
+		Response: &rpc_response.Response{ResultCode: constant.RESPONSE_CODE_SUCCESS},
 	}
 }
--- a/clients/config_client/config_proxy_interface.go
+++ b/clients/config_client/config_proxy_interface.go
@ -0,0 +1,19 @@
+package config_client
+
+import (
+	"context"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+)
+
+type IConfigProxy interface {
+	queryConfig(dataId, group, tenant string, timeout uint64, notify bool, client *ConfigClient) (*rpc_response.ConfigQueryResponse, error)
+	searchConfigProxy(param vo.SearchConfigParam, tenant, accessKey, secretKey string) (*model.ConfigPage, error)
+	requestProxy(rpcClient *rpc.RpcClient, request rpc_request.IRequest, timeoutMills uint64) (rpc_response.IResponse, error)
+	createRpcClient(ctx context.Context, taskId string, client *ConfigClient) *rpc.RpcClient
+	getRpcClient(client *ConfigClient) *rpc.RpcClient
+}
--- a/clients/config_client/limiter.go
+++ b/clients/config_client/limiter.go
@ -0,0 +1,56 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config_client
+
+import (
+	"sync"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"golang.org/x/time/rate"
+)
+
+type rateLimiterCheck struct {
+	rateLimiterCache cache.ConcurrentMap // cache
+	mux              sync.Mutex
+}
+
+var checker rateLimiterCheck
+
+func init() {
+	checker = rateLimiterCheck{
+		rateLimiterCache: cache.NewConcurrentMap(),
+		mux:              sync.Mutex{},
+	}
+}
+
+// IsLimited return true when request is limited
+func IsLimited(checkKey string) bool {
+	checker.mux.Lock()
+	defer checker.mux.Unlock()
+	var limiter *rate.Limiter
+	lm, exist := checker.rateLimiterCache.Get(checkKey)
+	if !exist {
+		// define a new limiter,allow 5 times per second,and reserve stock is 5.
+		limiter = rate.NewLimiter(rate.Limit(5), 5)
+		checker.rateLimiterCache.Set(checkKey, limiter)
+	} else {
+		limiter = lm.(*rate.Limiter)
+	}
+	add := time.Now().Add(time.Second)
+	return !limiter.AllowN(add, 1)
+}
--- a/clients/config_client/limiter_test.go
+++ b/clients/config_client/limiter_test.go
@ -0,0 +1,48 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config_client
+
+import (
+	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLimiter(t *testing.T) {
+	client := createConfigClientTest()
+	success, err := client.PublishConfig(vo.ConfigParam{
+		DataId:  localConfigTest.DataId,
+		Group:   "default-group",
+		Content: "hello world"})
+
+	assert.Nil(t, err)
+	assert.True(t, success)
+
+	for i := 0; i <= 10; i++ {
+		content, err := client.GetConfig(vo.ConfigParam{
+			DataId: localConfigTest.DataId,
+			Group:  "default-group"})
+		if i > 4 {
+			assert.NotNil(t, err)
+		} else {
+			assert.Nil(t, err)
+			assert.Equal(t, "hello world", content)
+		}
+	}
+}
--- a/clients/nacos_client/nacos_client.go
+++ b/clients/nacos_client/nacos_client.go
@ -1,23 +1,31 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package nacos_client

 import (
-	"errors"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"log"
 	"os"
 	"strconv"
-)

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-09 16:39
-**/
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/file"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+)

 type NacosClient struct {
 	clientConfigValid  bool
@ -27,45 +35,43 @@ type NacosClient struct {
 	serverConfigs      []constant.ServerConfig
 }

-// 设置 clientConfig
+// SetClientConfig is use to set nacos client Config
 func (client *NacosClient) SetClientConfig(config constant.ClientConfig) (err error) {
 	if config.TimeoutMs <= 0 {
-		err = errors.New("[client.SetClientConfig] config.TimeoutMs should > 0")
-		return
-	}
-	if config.TimeoutMs <= config.ListenInterval {
-		err = errors.New("[client.SetClientConfig] config.TimeoutMs should > config.ListenInterval")
-		return
+		config.TimeoutMs = 10 * 1000
 	}

 	if config.BeatInterval <= 0 {
 		config.BeatInterval = 5 * 1000
 	}
-	if config.ListenInterval < 10*1000 {
-		config.ListenInterval = 10 * 1000
-	}

 	if config.UpdateThreadNum <= 0 {
 		config.UpdateThreadNum = 20
 	}

+	if len(config.LogLevel) == 0 {
+		config.LogLevel = "info"
+	}
+
 	if config.CacheDir == "" {
-		config.CacheDir = utils.GetCurrentPath() + string(os.PathSeparator) + "cache"
+		config.CacheDir = file.GetCurrentPath() + string(os.PathSeparator) + "cache"
 	}
+
 	if config.LogDir == "" {
-		config.LogDir = utils.GetCurrentPath() + string(os.PathSeparator) + "log"
+		config.LogDir = file.GetCurrentPath() + string(os.PathSeparator) + "log"
 	}
-	log.Printf("[INFO] logDir:<%s>   cacheDir:<%s>", config.LogDir, config.CacheDir)
+
 	client.clientConfig = config
 	client.clientConfigValid = true

 	return
 }

-// 设置 serverConfigs
+// SetServerConfig is use to set nacos server config
 func (client *NacosClient) SetServerConfig(configs []constant.ServerConfig) (err error) {
 	if len(configs) <= 0 {
-		err = errors.New("[client.SetServerConfig] configs can not be empty")
+		//it's may be use endpoint to get nacos server address
+		client.serverConfigsValid = true
 		return
 	}

@ -77,13 +83,16 @@ func (client *NacosClient) SetServerConfig(configs []constant.ServerConfig) (err
 		if len(configs[i].ContextPath) <= 0 {
 			configs[i].ContextPath = constant.DEFAULT_CONTEXT_PATH
 		}
+		if len(configs[i].Scheme) <= 0 {
+			configs[i].Scheme = constant.DEFAULT_SERVER_SCHEME
+		}
 	}
 	client.serverConfigs = configs
 	client.serverConfigsValid = true
 	return
 }

-// 获取 clientConfig
+// GetClientConfig use to get client config
 func (client *NacosClient) GetClientConfig() (config constant.ClientConfig, err error) {
 	config = client.clientConfig
 	if !client.clientConfigValid {
@ -92,7 +101,7 @@ func (client *NacosClient) GetClientConfig() (config constant.ClientConfig, err
 	return
 }

-// 获取serverConfigs
+// GetServerConfig use to get server config
 func (client *NacosClient) GetServerConfig() (configs []constant.ServerConfig, err error) {
 	configs = client.serverConfigs
 	if !client.serverConfigsValid {
@ -101,6 +110,7 @@ func (client *NacosClient) GetServerConfig() (configs []constant.ServerConfig, e
 	return
 }

+// SetHttpAgent use to set http agent
 func (client *NacosClient) SetHttpAgent(agent http_agent.IHttpAgent) (err error) {
 	if agent == nil {
 		err = errors.New("[client.SetHttpAgent] http agent can not be nil")
@ -110,6 +120,7 @@ func (client *NacosClient) SetHttpAgent(agent http_agent.IHttpAgent) (err error)
 	return
 }

+// GetHttpAgent use to get http agent
 func (client *NacosClient) GetHttpAgent() (agent http_agent.IHttpAgent, err error) {
 	if client.agent == nil {
 		err = errors.New("[client.GetHttpAgent] invalid http agent")
--- a/clients/nacos_client/nacos_client_interface.go
+++ b/clients/nacos_client/nacos_client_interface.go
@ -1,26 +1,40 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package nacos_client

 import (
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-09 16:32
-**/
-
 //go:generate mockgen -destination mock_nacos_client_interface.go -package nacos_client -source=./nacos_client_interface.go

 type INacosClient interface {
+
+	//SetClientConfig is use to set nacos client config
 	SetClientConfig(constant.ClientConfig) error
+	//SetServerConfig is use to set nacos server config
 	SetServerConfig([]constant.ServerConfig) error
+	//GetClientConfig use to get client config
 	GetClientConfig() (constant.ClientConfig, error)
+	//GetServerConfig use to get server config
 	GetServerConfig() ([]constant.ServerConfig, error)
+	//SetHttpAgent use to set http agent
 	SetHttpAgent(http_agent.IHttpAgent) error
+	//GetHttpAgent use to get http agent
 	GetHttpAgent() (http_agent.IHttpAgent, error)
 }
--- a/clients/naming_client/beat_reactor.go
+++ b/clients/naming_client/beat_reactor.go
@ -1,91 +0,0 @@
-package naming_client
-
-import (
-	"github.com/nacos-group/nacos-sdk-go/clients/cache"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	nsema "github.com/toolkits/concurrent/semaphore"
-	"log"
-	"strconv"
-	"time"
-)
-
-type BeatReactor struct {
-	beatMap            cache.ConcurrentMap
-	serviceProxy       NamingProxy
-	clientBeatInterval int64
-	beatThreadCount    int
-	beatRecordMap      cache.ConcurrentMap
-}
-
-const Default_Bead_Thread_Num = 20
-
-func NewBeatReactor(serviceProxy NamingProxy, clientBeatInterval int64) BeatReactor {
-	br := BeatReactor{}
-	if clientBeatInterval <= 0 {
-		clientBeatInterval = 5 * 1000
-	}
-	br.beatMap = cache.NewConcurrentMap()
-	br.serviceProxy = serviceProxy
-	br.clientBeatInterval = clientBeatInterval
-	br.beatThreadCount = Default_Bead_Thread_Num
-	br.beatRecordMap = cache.NewConcurrentMap()
-	go br.sendBeat()
-	return br
-}
-
-func buildKey(serviceName string, ip string, port uint64) string {
-	return serviceName + constant.NAMING_INSTANCE_ID_SPLITTER + ip + constant.NAMING_INSTANCE_ID_SPLITTER + strconv.Itoa(int(port))
-}
-
-func (br *BeatReactor) AddBeatInfo(serviceName string, beatInfo model.BeatInfo) {
-	log.Printf("[INFO] adding beat: <%s> to beat map.\n", utils.ToJsonString(beatInfo))
-	br.beatMap.Set(buildKey(serviceName, beatInfo.Ip, beatInfo.Port), beatInfo)
-}
-
-func (br *BeatReactor) RemoveBeatInfo(serviceName string, ip string, port uint64) {
-	log.Printf("[INFO] remove beat: %s@%s:%d from beat map.\n", serviceName, ip, port)
-	br.beatMap.Remove(buildKey(serviceName, ip, port))
-}
-
-func (br *BeatReactor) sendBeat() {
-	sema := nsema.NewSemaphore(br.beatThreadCount)
-	for {
-		if br.beatMap.Count() > 0 {
-			for k, item := range br.beatMap.Items() {
-				var lastBeatTime int64
-				beatInfo := item.(model.BeatInfo)
-				store, ok := br.beatRecordMap.Get(k)
-				if !ok {
-					lastBeatTime = 0
-				} else {
-					lastBeatTime = store.(int64)
-				}
-				if utils.CurrentMillis()-lastBeatTime > br.clientBeatInterval && !beatInfo.Scheduled {
-					sema.Acquire()
-					beatInfo.Scheduled = true
-					br.beatMap.Set(k, beatInfo)
-					go func(k string, beatInfo model.BeatInfo) {
-						defer sema.Release()
-						beatInterval, err := br.serviceProxy.SendBeat(beatInfo)
-						if err != nil {
-							log.Printf("[ERROR]:beat to server return error:%s \n", err.Error())
-							beatInfo.Scheduled = false
-							br.beatMap.Set(k, beatInfo)
-							return
-						}
-						if beatInterval > 0 {
-							br.clientBeatInterval = beatInterval
-						}
-						beatInfo.Scheduled = false
-						br.beatMap.Set(k, beatInfo)
-						br.beatRecordMap.Set(k, utils.CurrentMillis())
-					}(k, beatInfo)
-				}
-			}
-		}
-		time.Sleep(200 * time.Millisecond)
-	}
-
-}
--- a/clients/naming_client/beat_reactor_test.go
+++ b/clients/naming_client/beat_reactor_test.go
@ -1,58 +0,0 @@
-package naming_client
-
-import (
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/stretchr/testify/assert"
-	"testing"
-)
-
-func TestBeatReactor_AddBeatInfo(t *testing.T) {
-	br := NewBeatReactor(NamingProxy{}, 5000)
-	serviceName := "Test"
-	groupName := "public"
-	beatInfo := model.BeatInfo{
-		Ip:          "127.0.0.1",
-		Port:        8080,
-		Metadata:    map[string]string{},
-		ServiceName: utils.GetGroupName(serviceName, groupName),
-		Cluster:     "default",
-		Weight:      1,
-	}
-	br.AddBeatInfo(utils.GetGroupName(serviceName, groupName), beatInfo)
-	key := buildKey(utils.GetGroupName(serviceName, groupName), beatInfo.Ip, beatInfo.Port)
-	result, ok := br.beatMap.Get(key)
-	assert.Equal(t, ok, true, "key should exists!")
-	assert.ObjectsAreEqual(result.(model.BeatInfo), beatInfo)
-}
-
-func TestBeatReactor_RemoveBeatInfo(t *testing.T) {
-	br := NewBeatReactor(NamingProxy{}, 5000)
-	serviceName := "Test"
-	groupName := "public"
-	beatInfo1 := model.BeatInfo{
-		Ip:          "127.0.0.1",
-		Port:        8080,
-		Metadata:    map[string]string{},
-		ServiceName: utils.GetGroupName(serviceName, groupName),
-		Cluster:     "default",
-		Weight:      1,
-	}
-	br.AddBeatInfo(utils.GetGroupName(serviceName, groupName), beatInfo1)
-	beatInfo2 := model.BeatInfo{
-		Ip:          "127.0.0.2",
-		Port:        8080,
-		Metadata:    map[string]string{},
-		ServiceName: utils.GetGroupName(serviceName, groupName),
-		Cluster:     "default",
-		Weight:      1,
-	}
-	br.AddBeatInfo(utils.GetGroupName(serviceName, groupName), beatInfo2)
-	br.RemoveBeatInfo(utils.GetGroupName(serviceName, groupName), "127.0.0.1", 8080)
-	key := buildKey(utils.GetGroupName(serviceName, groupName), beatInfo2.Ip, beatInfo2.Port)
-	result, ok := br.beatMap.Get(key)
-	assert.Equal(t, br.beatMap.Count(), 1, "beatinfo map length should be 1")
-	assert.Equal(t, ok, true, "key should exists!")
-	assert.ObjectsAreEqual(result.(model.BeatInfo), beatInfo2)
-
-}
--- a/clients/naming_client/host_reactor_test.go
+++ b/clients/naming_client/host_reactor_test.go
@ -1,9 +0,0 @@
-package naming_client
-
-import (
-	"testing"
-)
-
-func TestHostReactor_GetServiceInfo(t *testing.T) {
-
-}
--- a/clients/naming_client/host_reator.go
+++ b/clients/naming_client/host_reator.go
@ -1,132 +0,0 @@
-package naming_client
-
-import (
-	"github.com/nacos-group/nacos-sdk-go/clients/cache"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	nsema "github.com/toolkits/concurrent/semaphore"
-	"log"
-	"reflect"
-	"time"
-)
-
-type HostReactor struct {
-	serviceInfoMap       cache.ConcurrentMap
-	cacheDir             string
-	updateThreadNum      int
-	serviceProxy         NamingProxy
-	pushReceiver         PushReceiver
-	subCallback          SubscribeCallback
-	updateTimeMap        cache.ConcurrentMap
-	updateCacheWhenEmpty bool
-}
-
-const Default_Update_Thread_Num = 20
-
-func NewHostReactor(serviceProxy NamingProxy, cacheDir string, updateThreadNum int, notLoadCacheAtStart bool, subCallback SubscribeCallback, updateCacheWhenEmpty bool) HostReactor {
-	if updateThreadNum <= 0 {
-		updateThreadNum = Default_Update_Thread_Num
-	}
-	hr := HostReactor{
-		serviceProxy:         serviceProxy,
-		cacheDir:             cacheDir,
-		updateThreadNum:      updateThreadNum,
-		serviceInfoMap:       cache.NewConcurrentMap(),
-		subCallback:          subCallback,
-		updateTimeMap:        cache.NewConcurrentMap(),
-		updateCacheWhenEmpty: updateCacheWhenEmpty,
-	}
-	pr := NewPushRecevier(&hr)
-	hr.pushReceiver = *pr
-	if !notLoadCacheAtStart {
-		hr.loadCacheFromDisk()
-	}
-	go hr.asyncUpdateService()
-	return hr
-}
-
-func (hr *HostReactor) loadCacheFromDisk() {
-	serviceMap := cache.ReadServicesFromFile(hr.cacheDir)
-	if serviceMap == nil || len(serviceMap) == 0 {
-		return
-	}
-	for k, v := range serviceMap {
-		hr.serviceInfoMap.Set(k, v)
-	}
-}
-
-func (hr *HostReactor) ProcessServiceJson(result string) {
-	service := utils.JsonToService(result)
-	if service == nil {
-		return
-	}
-	cacheKey := utils.GetServiceCacheKey(service.Name, service.Clusters)
-
-	oldDomain, ok := hr.serviceInfoMap.Get(cacheKey)
-	if ok && !hr.updateCacheWhenEmpty {
-		//if instance list is empty,not to update cache
-		if len(result) == 0 {
-			log.Printf("[ERROR]:do not have useful host, ignore it, name:%s \n", service.Name)
-			return
-		}
-	}
-	if !ok || ok && !reflect.DeepEqual(service.Hosts, oldDomain.(model.Service).Hosts) {
-		if !ok {
-			log.Println("[INFO] service not found in cache " + cacheKey)
-		} else {
-			log.Printf("[INFO] service key:%s was updated to:%s \n", cacheKey, utils.ToJsonString(service))
-		}
-		cache.WriteServicesToFile(*service, hr.cacheDir)
-		hr.subCallback.ServiceChanged(service)
-	}
-	hr.updateTimeMap.Set(cacheKey, uint64(utils.CurrentMillis()))
-	hr.serviceInfoMap.Set(cacheKey, *service)
-}
-
-func (hr *HostReactor) GetServiceInfo(serviceName string, clusters string) model.Service {
-	key := utils.GetServiceCacheKey(serviceName, clusters)
-	cacheService, ok := hr.serviceInfoMap.Get(key)
-	if !ok {
-		cacheService = model.Service{Name: serviceName, Clusters: clusters}
-		hr.serviceInfoMap.Set(key, cacheService)
-		hr.updateServiceNow(serviceName, clusters)
-	}
-	newService, _ := hr.serviceInfoMap.Get(key)
-
-	return newService.(model.Service)
-}
-
-func (hr *HostReactor) updateServiceNow(serviceName string, clusters string) {
-	result, err := hr.serviceProxy.QueryList(serviceName, clusters, hr.pushReceiver.port, false)
-	if err != nil {
-		log.Printf("[ERROR]:query list return error!servieName:%s cluster:%s  err:%s \n", serviceName, clusters, err.Error())
-		return
-	}
-	if result == "" {
-		log.Printf("[ERROR]:query list is empty!servieName:%s cluster:%s \n", serviceName, clusters)
-		return
-	}
-	hr.ProcessServiceJson(result)
-}
-
-func (hr *HostReactor) asyncUpdateService() {
-	sema := nsema.NewSemaphore(hr.updateThreadNum)
-	for {
-		for _, v := range hr.serviceInfoMap.Items() {
-			service := v.(model.Service)
-			lastRefTime, ok := hr.updateTimeMap.Get(utils.GetServiceCacheKey(service.Name, service.Clusters))
-			if !ok {
-				lastRefTime = uint64(0)
-			}
-			if uint64(utils.CurrentMillis())-lastRefTime.(uint64) > service.CacheMillis {
-				sema.Acquire()
-				go func() {
-					hr.updateServiceNow(service.Name, service.Clusters)
-					sema.Release()
-				}()
-			}
-		}
-		time.Sleep(1 * time.Second)
-	}
-
-}
--- a/clients/naming_client/naming_cache/service_info_holder.go
+++ b/clients/naming_client/naming_cache/service_info_holder.go
@ -0,0 +1,191 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_cache
+
+import (
+	"os"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type ServiceInfoHolder struct {
+	ServiceInfoMap       sync.Map
+	updateCacheWhenEmpty bool
+	cacheDir             string
+	notLoadCacheAtStart  bool
+	subCallback          *SubscribeCallback
+	UpdateTimeMap        sync.Map
+}
+
+func NewServiceInfoHolder(namespace, cacheDir string, updateCacheWhenEmpty, notLoadCacheAtStart bool) *ServiceInfoHolder {
+	cacheDir = cacheDir + string(os.PathSeparator) + "naming" + string(os.PathSeparator) + namespace
+	serviceInfoHolder := &ServiceInfoHolder{
+		updateCacheWhenEmpty: updateCacheWhenEmpty,
+		notLoadCacheAtStart:  notLoadCacheAtStart,
+		cacheDir:             cacheDir,
+		subCallback:          NewSubscribeCallback(),
+		UpdateTimeMap:        sync.Map{},
+		ServiceInfoMap:       sync.Map{},
+	}
+
+	if !notLoadCacheAtStart {
+		serviceInfoHolder.loadCacheFromDisk()
+	}
+	return serviceInfoHolder
+}
+
+func (s *ServiceInfoHolder) loadCacheFromDisk() {
+	serviceMap := cache.ReadServicesFromFile(s.cacheDir)
+	if serviceMap == nil || len(serviceMap) == 0 {
+		return
+	}
+	for k, v := range serviceMap {
+		s.ServiceInfoMap.Store(k, v)
+	}
+}
+
+func (s *ServiceInfoHolder) ProcessServiceJson(data string) {
+	s.ProcessService(util.JsonToService(data))
+}
+
+func (s *ServiceInfoHolder) ProcessService(service *model.Service) {
+	if service == nil {
+		return
+	}
+	if !s.updateCacheWhenEmpty {
+		//if instance list is empty,not to update cache
+		if service.Hosts == nil || len(service.Hosts) == 0 {
+			logger.Warnf("instance list is empty, updateCacheWhenEmpty is set to false, callback is not triggered. service name:%s", service.Name)
+			return
+		}
+	}
+
+	cacheKey := util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName), service.Clusters)
+	oldDomain, ok := s.ServiceInfoMap.Load(cacheKey)
+	if ok && oldDomain.(model.Service).LastRefTime >= service.LastRefTime {
+		logger.Warnf("out of date data received, old-t: %d, new-t: %d", oldDomain.(model.Service).LastRefTime, service.LastRefTime)
+		return
+	}
+
+	s.UpdateTimeMap.Store(cacheKey, uint64(util.CurrentMillis()))
+	s.ServiceInfoMap.Store(cacheKey, *service)
+	if !ok || checkInstanceChanged(oldDomain, *service) {
+		logger.Infof("service key:%s was updated to:%s", cacheKey, util.ToJsonString(service))
+		cache.WriteServicesToFile(service, cacheKey, s.cacheDir)
+		s.subCallback.ServiceChanged(cacheKey, service)
+	}
+	var count int
+	s.ServiceInfoMap.Range(func(key, value interface{}) bool {
+		count++
+		return true
+	})
+	monitor.GetServiceInfoMapSizeMonitor().Set(float64(count))
+}
+
+func (s *ServiceInfoHolder) GetServiceInfo(serviceName, groupName, clusters string) (model.Service, bool) {
+	cacheKey := util.GetServiceCacheKey(util.GetGroupName(serviceName, groupName), clusters)
+	//todo FailoverReactor
+	service, ok := s.ServiceInfoMap.Load(cacheKey)
+	if ok {
+		return service.(model.Service), ok
+	}
+	return model.Service{}, ok
+}
+
+func (s *ServiceInfoHolder) RegisterCallback(serviceName string, clusters string, callbackWrapper *SubscribeCallbackFuncWrapper) {
+	s.subCallback.AddCallbackFunc(serviceName, clusters, callbackWrapper)
+}
+
+func (s *ServiceInfoHolder) DeregisterCallback(serviceName string, clusters string, callbackWrapper *SubscribeCallbackFuncWrapper) {
+	s.subCallback.RemoveCallbackFunc(serviceName, clusters, callbackWrapper)
+}
+
+func (s *ServiceInfoHolder) StopUpdateIfContain(serviceName, clusters string) {
+	cacheKey := util.GetServiceCacheKey(serviceName, clusters)
+	s.ServiceInfoMap.Delete(cacheKey)
+}
+
+func (s *ServiceInfoHolder) IsSubscribed(serviceName, clusters string) bool {
+	return s.subCallback.IsSubscribed(serviceName, clusters)
+}
+
+func checkInstanceChanged(oldDomain interface{}, service model.Service) bool {
+	if oldDomain == nil {
+		return true
+	}
+	oldService := oldDomain.(model.Service)
+	return isServiceInstanceChanged(oldService, service)
+}
+
+// return true when service instance changed ,otherwise return false.
+func isServiceInstanceChanged(oldService, newService model.Service) bool {
+	oldHostsLen := len(oldService.Hosts)
+	newHostsLen := len(newService.Hosts)
+	if oldHostsLen != newHostsLen {
+		return true
+	}
+	// compare refTime
+	oldRefTime := oldService.LastRefTime
+	newRefTime := newService.LastRefTime
+	if oldRefTime > newRefTime {
+		logger.Warnf("out of date data received, old-t: %v , new-t:  %v", oldRefTime, newRefTime)
+		return false
+	}
+	// sort instance list
+	oldInstance := oldService.Hosts
+	newInstance := make([]model.Instance, len(newService.Hosts))
+	copy(newInstance, newService.Hosts)
+	sortInstance(oldInstance)
+	sortInstance(newInstance)
+	return !reflect.DeepEqual(oldInstance, newInstance)
+}
+
+type instanceSorter []model.Instance
+
+func (s instanceSorter) Len() int {
+	return len(s)
+}
+func (s instanceSorter) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+func (s instanceSorter) Less(i, j int) bool {
+	insI, insJ := s[i], s[j]
+	// using ip and port to sort
+	ipNum1, _ := strconv.Atoi(strings.ReplaceAll(insI.Ip, ".", ""))
+	ipNum2, _ := strconv.Atoi(strings.ReplaceAll(insJ.Ip, ".", ""))
+	if ipNum1 < ipNum2 {
+		return true
+	}
+	if insI.Port < insJ.Port {
+		return true
+	}
+	return false
+}
+
+// sort instances
+func sortInstance(instances []model.Instance) {
+	sort.Sort(instanceSorter(instances))
+}
--- a/clients/naming_client/naming_cache/service_info_holder_test.go
+++ b/clients/naming_client/naming_cache/service_info_holder_test.go
@ -0,0 +1,152 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package naming_cache
+
+import (
+	"fmt"
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestServiceInfoHolder_isServiceInstanceChanged(t *testing.T) {
+	rand.Seed(time.Now().Unix())
+	defaultIp := createRandomIp()
+	defaultPort := creatRandomPort()
+	serviceA := model.Service{
+		LastRefTime: 1000,
+		Hosts: []model.Instance{
+			{
+				Ip:   defaultIp,
+				Port: defaultPort,
+			},
+			{
+				Ip:   defaultIp,
+				Port: defaultPort + 1,
+			},
+			{
+				Ip:   defaultIp,
+				Port: defaultPort + 2,
+			},
+		},
+	}
+	serviceB := model.Service{
+		LastRefTime: 1001,
+		Hosts: []model.Instance{
+			{
+				Ip:   defaultIp,
+				Port: defaultPort,
+			},
+			{
+				Ip:   defaultIp,
+				Port: defaultPort + 3,
+			},
+			{
+				Ip:   defaultIp,
+				Port: defaultPort + 4,
+			},
+		},
+	}
+	ip := createRandomIp()
+	serviceC := model.Service{
+		LastRefTime: 1001,
+		Hosts: []model.Instance{
+			{
+				Ip:   ip,
+				Port: defaultPort,
+			},
+			{
+				Ip:   ip,
+				Port: defaultPort + 3,
+			},
+			{
+				Ip:   ip,
+				Port: defaultPort + 4,
+			},
+		},
+	}
+
+	t.Run("compareWithSelf", func(t *testing.T) {
+		changed := isServiceInstanceChanged(serviceA, serviceA)
+		assert.Equal(t, false, changed)
+	})
+	// compareWithIp
+	t.Run("compareWithIp", func(t *testing.T) {
+		changed := isServiceInstanceChanged(serviceA, serviceC)
+		assert.Equal(t, true, changed)
+	})
+	// compareWithPort
+	t.Run("compareWithPort", func(t *testing.T) {
+		changed := isServiceInstanceChanged(serviceA, serviceB)
+		assert.Equal(t, true, changed)
+	})
+}
+
+func TestHostReactor_isServiceInstanceChangedWithUnOrdered(t *testing.T) {
+	rand.Seed(time.Now().Unix())
+	serviceA := model.Service{
+		LastRefTime: 1001,
+		Hosts: []model.Instance{
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+		},
+	}
+
+	serviceB := model.Service{
+		LastRefTime: 1001,
+		Hosts: []model.Instance{
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+			{
+				Ip:   createRandomIp(),
+				Port: creatRandomPort(),
+			},
+		},
+	}
+	logger.Info("serviceA:%s and serviceB:%s are comparing", serviceA.Hosts, serviceB.Hosts)
+	changed := isServiceInstanceChanged(serviceA, serviceB)
+	assert.True(t, changed)
+}
+
+// create random ip addr
+func createRandomIp() string {
+	ip := fmt.Sprintf("%d.%d.%d.%d", rand.Intn(255), rand.Intn(255), rand.Intn(255), rand.Intn(255))
+	return ip
+}
+
+func creatRandomPort() uint64 {
+	return rand.Uint64()
+}
--- a/clients/naming_client/naming_cache/subscribe_callback.go
+++ b/clients/naming_client/naming_cache/subscribe_callback.go
@ -0,0 +1,82 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_cache
+
+import (
+	"sync"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type SubscribeCallback struct {
+	callbackFuncMap cache.ConcurrentMap
+	mux             *sync.Mutex
+}
+
+func NewSubscribeCallback() *SubscribeCallback {
+	return &SubscribeCallback{callbackFuncMap: cache.NewConcurrentMap(), mux: new(sync.Mutex)}
+}
+
+func (ed *SubscribeCallback) IsSubscribed(serviceName, clusters string) bool {
+	key := util.GetServiceCacheKey(serviceName, clusters)
+	funcs, ok := ed.callbackFuncMap.Get(key)
+	if ok {
+		return len(funcs.([]*SubscribeCallbackFuncWrapper)) > 0
+	}
+	return false
+}
+
+func (ed *SubscribeCallback) AddCallbackFunc(serviceName string, clusters string, callbackWrapper *SubscribeCallbackFuncWrapper) {
+	key := util.GetServiceCacheKey(serviceName, clusters)
+	ed.mux.Lock()
+	defer ed.mux.Unlock()
+	var funcSlice []*SubscribeCallbackFuncWrapper
+	old, ok := ed.callbackFuncMap.Get(key)
+	if ok {
+		funcSlice = append(funcSlice, old.([]*SubscribeCallbackFuncWrapper)...)
+	}
+	funcSlice = append(funcSlice, callbackWrapper)
+	ed.callbackFuncMap.Set(key, funcSlice)
+}
+
+func (ed *SubscribeCallback) RemoveCallbackFunc(serviceName string, clusters string, callbackWrapper *SubscribeCallbackFuncWrapper) {
+	logger.Info("removing " + serviceName + " with " + clusters + " to listener map")
+	key := util.GetServiceCacheKey(serviceName, clusters)
+	funcs, ok := ed.callbackFuncMap.Get(key)
+	if ok && funcs != nil {
+		var newFuncs []*SubscribeCallbackFuncWrapper
+		for _, funcItem := range funcs.([]*SubscribeCallbackFuncWrapper) {
+			if funcItem.CallbackFunc != callbackWrapper.CallbackFunc || !funcItem.Selector.Equals(callbackWrapper.Selector) {
+				newFuncs = append(newFuncs, funcItem)
+			}
+		}
+		ed.callbackFuncMap.Set(key, newFuncs)
+	}
+
+}
+
+func (ed *SubscribeCallback) ServiceChanged(cacheKey string, service *model.Service) {
+	funcs, ok := ed.callbackFuncMap.Get(cacheKey)
+	if ok {
+		for _, funcItem := range funcs.([]*SubscribeCallbackFuncWrapper) {
+			funcItem.notifyListener(service)
+		}
+	}
+}
--- a/clients/naming_client/naming_cache/subscribe_callback_test.go
+++ b/clients/naming_client/naming_cache/subscribe_callback_test.go
@ -0,0 +1,230 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_cache
+
+import (
+	"fmt"
+	"log"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEventDispatcher_AddCallbackFuncs(t *testing.T) {
+	service := model.Service{
+		Clusters:    strings.Join([]string{"default"}, ","),
+		CacheMillis: 10000,
+		Checksum:    "abcd",
+		LastRefTime: uint64(time.Now().Unix()),
+	}
+	var hosts []model.Instance
+	host := model.Instance{
+		Enable:      true,
+		InstanceId:  "123",
+		Port:        8080,
+		Ip:          "127.0.0.1",
+		Weight:      10,
+		ServiceName: "public@@Test",
+		ClusterName: strings.Join([]string{"default"}, ","),
+	}
+	hosts = append(hosts, host)
+	service.Hosts = hosts
+
+	ed := NewSubscribeCallback()
+	param := vo.SubscribeParam{
+		ServiceName: "Test",
+		Clusters:    []string{"default"},
+		GroupName:   "public",
+		SubscribeCallback: func(services []model.Instance, err error) {
+			fmt.Println(util.ToJsonString(ed.callbackFuncMap))
+		},
+	}
+	clusterSelector := NewClusterSelector(param.Clusters)
+	callbackWrapper := NewSubscribeCallbackFuncWrapper(clusterSelector, &param.SubscribeCallback)
+	ed.AddCallbackFunc(util.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), callbackWrapper)
+	key := util.GetServiceCacheKey(util.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
+	for k, v := range ed.callbackFuncMap.Items() {
+		assert.Equal(t, key, k, "key should be equal!")
+		funcs := v.([]*SubscribeCallbackFuncWrapper)
+		assert.Equal(t, len(funcs), 1)
+		assert.Equal(t, funcs[0].CallbackFunc, &param.SubscribeCallback, "callback function must be equal!")
+
+	}
+}
+
+func TestEventDispatcher_RemoveCallbackFuncs(t *testing.T) {
+	service := model.Service{
+		Clusters:    strings.Join([]string{"default"}, ","),
+		CacheMillis: 10000,
+		Checksum:    "abcd",
+		LastRefTime: uint64(time.Now().Unix()),
+	}
+	var hosts []model.Instance
+	host := model.Instance{
+		Enable:      true,
+		InstanceId:  "123",
+		Port:        8080,
+		Ip:          "127.0.0.1",
+		Weight:      10,
+		ServiceName: "public@@Test",
+		ClusterName: strings.Join([]string{"default"}, ","),
+	}
+	hosts = append(hosts, host)
+	service.Hosts = hosts
+
+	ed := NewSubscribeCallback()
+	param := vo.SubscribeParam{
+		ServiceName: "Test",
+		Clusters:    []string{"default"},
+		GroupName:   "public",
+		SubscribeCallback: func(services []model.Instance, err error) {
+			fmt.Printf("func1:%s \n", util.ToJsonString(services))
+		},
+	}
+	clusterSelector := NewClusterSelector(param.Clusters)
+	callbackWrapper := NewSubscribeCallbackFuncWrapper(clusterSelector, &param.SubscribeCallback)
+	ed.AddCallbackFunc(util.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), callbackWrapper)
+	assert.Equal(t, len(ed.callbackFuncMap.Items()), 1, "callback funcs map length should be 1")
+
+	param2 := vo.SubscribeParam{
+		ServiceName: "Test",
+		Clusters:    []string{"default"},
+		GroupName:   "public",
+		SubscribeCallback: func(services []model.Instance, err error) {
+			fmt.Printf("func2:%s \n", util.ToJsonString(services))
+		},
+	}
+	clusterSelector2 := NewClusterSelector(param2.Clusters)
+	callbackWrapper2 := NewSubscribeCallbackFuncWrapper(clusterSelector2, &param2.SubscribeCallback)
+	ed.AddCallbackFunc(util.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), callbackWrapper2)
+	assert.Equal(t, len(ed.callbackFuncMap.Items()), 1, "callback funcs map length should be 2")
+
+	for k, v := range ed.callbackFuncMap.Items() {
+		log.Printf("key:%s,%d", k, len(v.([]*SubscribeCallbackFuncWrapper)))
+	}
+
+	ed.RemoveCallbackFunc(util.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), callbackWrapper2)
+
+	key := util.GetServiceCacheKey(util.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
+	for k, v := range ed.callbackFuncMap.Items() {
+		assert.Equal(t, key, k, "key should be equal!")
+		funcs := v.([]*SubscribeCallbackFuncWrapper)
+		assert.Equal(t, len(funcs), 1)
+		assert.Equal(t, funcs[0].CallbackFunc, &param.SubscribeCallback, "callback function must be equal!")
+
+	}
+}
+
+func TestSubscribeCallback_ServiceChanged(t *testing.T) {
+	service := model.Service{
+		Name:        "public@@Test",
+		Clusters:    strings.Join([]string{"default"}, ","),
+		CacheMillis: 10000,
+		Checksum:    "abcd",
+		LastRefTime: uint64(time.Now().Unix()),
+	}
+	var hosts []model.Instance
+	host := model.Instance{
+		Enable:      true,
+		InstanceId:  "123",
+		Port:        8080,
+		Ip:          "127.0.0.1",
+		Weight:      10,
+		ServiceName: "public@@Test",
+		ClusterName: strings.Join([]string{"default"}, ","),
+	}
+	hosts = append(hosts, host)
+	service.Hosts = hosts
+
+	ed := NewSubscribeCallback()
+	param := vo.SubscribeParam{
+		ServiceName: "Test",
+		Clusters:    []string{"default"},
+		GroupName:   "public",
+		SubscribeCallback: func(services []model.Instance, err error) {
+			log.Printf("func1:%s \n", util.ToJsonString(services))
+		},
+	}
+	clusterSelector := NewClusterSelector(param.Clusters)
+	callbackWrapper := NewSubscribeCallbackFuncWrapper(clusterSelector, &param.SubscribeCallback)
+	ed.AddCallbackFunc(util.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), callbackWrapper)
+
+	param2 := vo.SubscribeParam{
+		ServiceName: "Test",
+		Clusters:    []string{"default"},
+		GroupName:   "public",
+		SubscribeCallback: func(services []model.Instance, err error) {
+			log.Printf("func2:%s \n", util.ToJsonString(services))
+
+		},
+	}
+	clusterSelector2 := NewClusterSelector(param2.Clusters)
+	callbackWrapper2 := NewSubscribeCallbackFuncWrapper(clusterSelector2, &param2.SubscribeCallback)
+	ed.AddCallbackFunc(util.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), callbackWrapper2)
+	cacheKey := util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName), service.Clusters)
+	ed.ServiceChanged(cacheKey, &service)
+}
+
+func TestSubscribeCallback_RemoveCallbackFunc(t *testing.T) {
+	ed := NewSubscribeCallback()
+	serviceName := "Test"
+	clusters := "default"
+	groupName := "public"
+
+	callback1 := func(services []model.Instance, err error) {
+		log.Printf("callback1:%s \n", util.ToJsonString(services))
+	}
+	clusterSelector1 := NewClusterSelector([]string{clusters})
+	callbackWrapper1 := NewSubscribeCallbackFuncWrapper(clusterSelector1, &callback1)
+
+	callback2 := func(services []model.Instance, err error) {
+		log.Printf("callback2:%s \n", util.ToJsonString(services))
+	}
+	clusterSelector2 := NewClusterSelector([]string{clusters})
+	callbackWrapper2 := NewSubscribeCallbackFuncWrapper(clusterSelector2, &callback2)
+
+	// Add both callbacks
+	ed.AddCallbackFunc(util.GetGroupName(serviceName, groupName), clusters, callbackWrapper1)
+	ed.AddCallbackFunc(util.GetGroupName(serviceName, groupName), clusters, callbackWrapper2)
+
+	assert.True(t, ed.IsSubscribed(util.GetGroupName(serviceName, groupName), clusters))
+	// Remove the first callback
+	ed.RemoveCallbackFunc(util.GetGroupName(serviceName, groupName), clusters, callbackWrapper1)
+
+	// Check if only the second callback remains
+	cacheKey := util.GetServiceCacheKey(util.GetGroupName(serviceName, groupName), clusters)
+	funcs, ok := ed.callbackFuncMap.Get(cacheKey)
+	if !ok || len(funcs.([]*SubscribeCallbackFuncWrapper)) != 1 {
+		t.Errorf("Expected 1 callback function, got %d", len(funcs.([]*SubscribeCallbackFuncWrapper)))
+	}
+
+	assert.True(t, ed.IsSubscribed(util.GetGroupName(serviceName, groupName), clusters))
+	// Remove the second callback
+	ed.RemoveCallbackFunc(util.GetGroupName(serviceName, groupName), clusters, callbackWrapper2)
+
+	// Check if no callbacks remain
+	funcs, ok = ed.callbackFuncMap.Get(cacheKey)
+	if ok && len(funcs.([]*SubscribeCallbackFuncWrapper)) != 0 {
+		t.Errorf("Expected 0 callback functions, got %d", len(funcs.([]*func(services []model.Instance, err error))))
+	}
+	assert.False(t, ed.IsSubscribed(util.GetGroupName(serviceName, groupName), clusters))
+}
--- a/clients/naming_client/naming_cache/subscribe_callback_wrapper.go
+++ b/clients/naming_client/naming_cache/subscribe_callback_wrapper.go
@ -0,0 +1,106 @@
+package naming_cache
+
+import (
+	"sort"
+	"strings"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type Selector interface {
+	SelectInstance(service *model.Service) []model.Instance
+	Equals(o Selector) bool
+}
+
+type ClusterSelector struct {
+	ClusterNames string
+	Clusters     []string
+}
+
+func NewClusterSelector(clusters []string) *ClusterSelector {
+	if len(clusters) == 0 {
+		return &ClusterSelector{
+			ClusterNames: "",
+			Clusters:     []string{},
+		}
+	}
+
+	// 创建副本避免外部修改
+	clustersCopy := make([]string, len(clusters))
+	copy(clustersCopy, clusters)
+
+	return &ClusterSelector{
+		ClusterNames: joinCluster(clusters),
+		Clusters:     clustersCopy,
+	}
+}
+
+func NewSubscribeCallbackFuncWrapper(selector Selector, callback *func(services []model.Instance, err error)) *SubscribeCallbackFuncWrapper {
+	if selector == nil {
+		panic("selector cannot be nil")
+	}
+
+	if callback == nil {
+		panic("callback cannot be nil")
+	}
+
+	return &SubscribeCallbackFuncWrapper{
+		Selector:     selector,
+		CallbackFunc: callback,
+	}
+}
+
+type SubscribeCallbackFuncWrapper struct {
+	Selector     Selector
+	CallbackFunc *func(services []model.Instance, err error)
+}
+
+func (ed *SubscribeCallbackFuncWrapper) notifyListener(service *model.Service) {
+	instances := ed.Selector.SelectInstance(service)
+	if ed.CallbackFunc != nil {
+		(*ed.CallbackFunc)(instances, nil)
+	}
+}
+
+func (cs *ClusterSelector) SelectInstance(service *model.Service) []model.Instance {
+	var instances []model.Instance
+	if cs.ClusterNames == "" {
+		return service.Hosts
+	}
+	for _, instance := range service.Hosts {
+		if util.Contains(cs.Clusters, instance.ClusterName) {
+			instances = append(instances, instance)
+		}
+	}
+	return instances
+}
+
+func (cs *ClusterSelector) Equals(o Selector) bool {
+	if o == nil {
+		return false
+	}
+	if o, ok := o.(*ClusterSelector); ok {
+		return cs.ClusterNames == o.ClusterNames
+	}
+	return false
+}
+
+func joinCluster(cluster []string) string {
+	// 使用map实现去重
+	uniqueSet := make(map[string]struct{})
+	for _, item := range cluster {
+		if item != "" { // 过滤空字符串，类似Java中的isNotEmpty
+			uniqueSet[item] = struct{}{}
+		}
+	}
+
+	uniqueSlice := make([]string, 0, len(uniqueSet))
+	for item := range uniqueSet {
+		uniqueSlice = append(uniqueSlice, item)
+	}
+	sort.Strings(uniqueSlice)
+
+	// 使用逗号连接
+	return strings.Join(uniqueSlice, ",")
+}
--- a/clients/naming_client/naming_client.go
+++ b/clients/naming_client/naming_client.go
@ -1,66 +1,117 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package naming_client

 import (
-	"github.com/nacos-group/nacos-sdk-go/clients/cache"
-	"github.com/nacos-group/nacos-sdk-go/clients/nacos_client"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/logger"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/nacos-group/nacos-sdk-go/vo"
-	"github.com/pkg/errors"
+	"context"
 	"math"
 	"math/rand"
-	"os"
 	"strings"
+	"sync"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/nacos_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_proxy"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
 )

+// NamingClient ...
 type NamingClient struct {
 	nacos_client.INacosClient
-	hostReactor  HostReactor
-	serviceProxy NamingProxy
-	subCallback  SubscribeCallback
-	beatReactor  BeatReactor
-	indexMap     cache.ConcurrentMap
+	ctx               context.Context
+	cancel            context.CancelFunc
+	serviceProxy      naming_proxy.INamingProxy
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+	isClosed          bool
+	mutex             sync.Mutex
 }

-func NewNamingClient(nc nacos_client.INacosClient) (NamingClient, error) {
-	naming := NamingClient{}
-	clientConfig, err :=
-		nc.GetClientConfig()
+// NewNamingClient ...
+func NewNamingClient(nc nacos_client.INacosClient) (*NamingClient, error) {
+	return NewNamingClientWithRamCredentialProvider(nc, nil)
+}
+
+// NewNamingClientWithRamCredentialProvider ...
+func NewNamingClientWithRamCredentialProvider(nc nacos_client.INacosClient, provider security.RamCredentialProvider) (*NamingClient, error) {
+	ctx, cancel := context.WithCancel(context.Background())
+	rand.Seed(time.Now().UnixNano())
+	naming := &NamingClient{INacosClient: nc, ctx: ctx, cancel: cancel}
+	clientConfig, err := nc.GetClientConfig()
 	if err != nil {
 		return naming, err
 	}
+
 	serverConfig, err := nc.GetServerConfig()
 	if err != nil {
 		return naming, err
 	}
+
 	httpAgent, err := nc.GetHttpAgent()
 	if err != nil {
 		return naming, err
 	}
-	err = logger.InitLog(clientConfig.LogDir)
+
+	if err = initLogger(clientConfig); err != nil {
+		return naming, err
+	}
+
+	if clientConfig.NamespaceId == "" {
+		clientConfig.NamespaceId = constant.DEFAULT_NAMESPACE_ID
+	}
+
+	naming.serviceInfoHolder = naming_cache.NewServiceInfoHolder(clientConfig.NamespaceId, clientConfig.CacheDir,
+		clientConfig.UpdateCacheWhenEmpty, clientConfig.NotLoadCacheAtStart)
+
+	naming.serviceProxy, err = NewNamingProxyDelegateWithRamCredentialProvider(ctx, clientConfig, serverConfig, httpAgent, naming.serviceInfoHolder, provider)
+
+	if clientConfig.AsyncUpdateService {
+		go NewServiceInfoUpdater(ctx, naming.serviceInfoHolder, clientConfig.UpdateThreadNum, naming.serviceProxy).asyncUpdateService()
+	}
 	if err != nil {
 		return naming, err
 	}
-	naming.subCallback = NewSubscribeCallback()
-	naming.serviceProxy, err = NewNamingProxy(clientConfig, serverConfig, httpAgent)
-	if err != nil {
-		return naming, err
-	}
-	naming.hostReactor = NewHostReactor(naming.serviceProxy, clientConfig.CacheDir+string(os.PathSeparator)+"naming",
-		clientConfig.UpdateThreadNum, clientConfig.NotLoadCacheAtStart, naming.subCallback, clientConfig.UpdateCacheWhenEmpty)
-	naming.beatReactor = NewBeatReactor(naming.serviceProxy, clientConfig.BeatInterval)
-	naming.indexMap = cache.NewConcurrentMap()

 	return naming, nil
 }

-// 注册服务实例
+func initLogger(clientConfig constant.ClientConfig) error {
+	return logger.InitLogger(logger.BuildLoggerConfig(clientConfig))
+}
+
+// RegisterInstance ...
 func (sc *NamingClient) RegisterInstance(param vo.RegisterInstanceParam) (bool, error) {
-	if param.GroupName == "" {
+	if param.ServiceName == "" {
+		return false, errors.New("serviceName cannot be empty!")
+	}
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
+	if param.Metadata == nil {
+		param.Metadata = make(map[string]string)
+	}
 	instance := model.Instance{
 		Ip:          param.Ip,
 		Port:        param.Port,
@ -71,63 +122,157 @@ func (sc *NamingClient) RegisterInstance(param vo.RegisterInstanceParam) (bool,
 		Weight:      param.Weight,
 		Ephemeral:   param.Ephemeral,
 	}
-	beatInfo := model.BeatInfo{
+	return sc.serviceProxy.RegisterInstance(param.ServiceName, param.GroupName, instance)
+}
+
+func (sc *NamingClient) BatchRegisterInstance(param vo.BatchRegisterInstanceParam) (bool, error) {
+	if param.ServiceName == "" {
+		return false, errors.New("serviceName cannot be empty!")
+	}
+	if len(param.GroupName) == 0 {
+		param.GroupName = constant.DEFAULT_GROUP
+	}
+	if len(param.Instances) == 0 {
+		return false, errors.New("instances cannot be empty!")
+	}
+	var modelInstances []model.Instance
+	for _, param := range param.Instances {
+		if !param.Ephemeral {
+			return false, errors.Errorf("Batch registration does not allow persistent instance registration! instance:%+v", param)
+		}
+		modelInstances = append(modelInstances, model.Instance{
+			Ip:          param.Ip,
+			Port:        param.Port,
+			Metadata:    param.Metadata,
+			ClusterName: param.ClusterName,
+			Healthy:     param.Healthy,
+			Enable:      param.Enable,
+			Weight:      param.Weight,
+			Ephemeral:   param.Ephemeral,
+		})
+	}
+
+	return sc.serviceProxy.BatchRegisterInstance(param.ServiceName, param.GroupName, modelInstances)
+}
+
+// DeregisterInstance ...
+func (sc *NamingClient) DeregisterInstance(param vo.DeregisterInstanceParam) (bool, error) {
+	if len(param.GroupName) == 0 {
+		param.GroupName = constant.DEFAULT_GROUP
+	}
+	instance := model.Instance{
+		Ip:          param.Ip,
+		Port:        param.Port,
+		ClusterName: param.Cluster,
+		Ephemeral:   param.Ephemeral,
+	}
+	return sc.serviceProxy.DeregisterInstance(param.ServiceName, param.GroupName, instance)
+}
+
+// UpdateInstance ...
+func (sc *NamingClient) UpdateInstance(param vo.UpdateInstanceParam) (bool, error) {
+	if param.ServiceName == "" {
+		return false, errors.New("serviceName cannot be empty!")
+	}
+	if len(param.GroupName) == 0 {
+		param.GroupName = constant.DEFAULT_GROUP
+	}
+	if param.Metadata == nil {
+		param.Metadata = make(map[string]string)
+	}
+	instance := model.Instance{
 		Ip:          param.Ip,
 		Port:        param.Port,
 		Metadata:    param.Metadata,
-		ServiceName: utils.GetGroupName(param.ServiceName, param.GroupName),
-		Cluster:     param.ClusterName,
+		ClusterName: param.ClusterName,
+		Healthy:     param.Healthy,
+		Enable:      param.Enable,
 		Weight:      param.Weight,
+		Ephemeral:   param.Ephemeral,
 	}
-	_, err := sc.serviceProxy.RegisterInstance(utils.GetGroupName(param.ServiceName, param.GroupName), param.GroupName, instance)
-	if err != nil {
-		return false, err
-	}
-	if instance.Ephemeral {
-		sc.beatReactor.AddBeatInfo(utils.GetGroupName(param.ServiceName, param.GroupName), beatInfo)
-	}
-	return true, nil
+
+	return sc.serviceProxy.RegisterInstance(param.ServiceName, param.GroupName, instance)

 }

-// 注销服务实例
-func (sc *NamingClient) DeregisterInstance(param vo.DeregisterInstanceParam) (bool, error) {
-	if param.GroupName == "" {
+// GetService Get service info by Group and DataId, clusters was optional
+func (sc *NamingClient) GetService(param vo.GetServiceParam) (service model.Service, err error) {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	_, err := sc.serviceProxy.DeregisterInstance(utils.GetGroupName(param.ServiceName, param.GroupName), param.Ip, param.Port, param.Cluster, param.Ephemeral)
-	if err != nil {
-		return false, err
+	var ok bool
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	clusters := strings.Join(param.Clusters, ",")
+	service, ok = sc.serviceInfoHolder.GetServiceInfo(param.ServiceName, param.GroupName, "")
+	if !ok {
+		service, err = sc.serviceProxy.Subscribe(param.ServiceName, param.GroupName, "")
 	}
-	sc.beatReactor.RemoveBeatInfo(utils.GetGroupName(param.ServiceName, param.GroupName), param.Ip, param.Port)
-	return true, nil
+	service.Clusters = clusters
+	service.Hosts = clusterSelector.SelectInstance(&service)
+	return service, err
 }

-// 获取服务列表
-func (sc *NamingClient) GetService(param vo.GetServiceParam) (model.Service, error) {
-	if param.GroupName == "" {
+// GetAllServicesInfo Get all instance by Namespace and Group with page
+func (sc *NamingClient) GetAllServicesInfo(param vo.GetAllServiceInfoParam) (model.ServiceList, error) {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	service := sc.hostReactor.GetServiceInfo(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
-	return service, nil
+	clientConfig, _ := sc.GetClientConfig()
+	if len(param.NameSpace) == 0 {
+		if len(clientConfig.NamespaceId) == 0 {
+			param.NameSpace = constant.DEFAULT_NAMESPACE_ID
+		} else {
+			param.NameSpace = clientConfig.NamespaceId
+		}
+	}
+	services, err := sc.serviceProxy.GetServiceList(param.PageNo, param.PageSize, param.GroupName, param.NameSpace, &model.ExpressionSelector{})
+	return services, err
 }

+// SelectAllInstances Get all instance by DataId 和 Group
 func (sc *NamingClient) SelectAllInstances(param vo.SelectAllInstancesParam) ([]model.Instance, error) {
-	if param.GroupName == "" {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	service := sc.hostReactor.GetServiceInfo(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
-	if service.Hosts == nil || len(service.Hosts) == 0 {
-		return []model.Instance{}, errors.New("instance list is empty!")
+	var (
+		service model.Service
+		ok      bool
+		err     error
+	)
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	service, ok = sc.serviceInfoHolder.GetServiceInfo(param.ServiceName, param.GroupName, "")
+	if !ok {
+		service, err = sc.serviceProxy.Subscribe(param.ServiceName, param.GroupName, "")
 	}
-	return service.Hosts, nil
+	if err != nil {
+		return []model.Instance{}, err
+	}
+	instances := clusterSelector.SelectInstance(&service)
+	if instances == nil || len(instances) == 0 {
+		return []model.Instance{}, err
+	}
+	return instances, err
 }

+// SelectInstances Get all instance by DataId, Group and Health
 func (sc *NamingClient) SelectInstances(param vo.SelectInstancesParam) ([]model.Instance, error) {
-	if param.GroupName == "" {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	service := sc.hostReactor.GetServiceInfo(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
+	var (
+		service model.Service
+		ok      bool
+		err     error
+	)
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	service, ok = sc.serviceInfoHolder.GetServiceInfo(param.ServiceName, param.GroupName, "")
+	if !ok {
+		service, err = sc.serviceProxy.Subscribe(param.ServiceName, param.GroupName, "")
+		if err != nil {
+			return nil, err
+		}
+	}
+	service.Hosts = clusterSelector.SelectInstance(&service)
 	return sc.selectInstances(service, param.HealthyOnly)
 }

@ -137,6 +282,7 @@ func (sc *NamingClient) selectInstances(service model.Service, healthy bool) ([]
 	}
 	hosts := service.Hosts
 	var result []model.Instance
+	logger.Infof("select instances with options: [healthy:<%t>], with service:<%s>", healthy, util.GetGroupName(service.Name, service.GroupName))
 	for _, host := range hosts {
 		if host.Healthy == healthy && host.Enable && host.Weight > 0 {
 			result = append(result, host)
@ -145,11 +291,25 @@ func (sc *NamingClient) selectInstances(service model.Service, healthy bool) ([]
 	return result, nil
 }

+// SelectOneHealthyInstance Get one healthy instance by DataId and Group
 func (sc *NamingClient) SelectOneHealthyInstance(param vo.SelectOneHealthInstanceParam) (*model.Instance, error) {
-	if param.GroupName == "" {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	service := sc.hostReactor.GetServiceInfo(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
+	var (
+		service model.Service
+		ok      bool
+		err     error
+	)
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	service, ok = sc.serviceInfoHolder.GetServiceInfo(param.ServiceName, param.GroupName, "")
+	if !ok {
+		service, err = sc.serviceProxy.Subscribe(param.ServiceName, param.GroupName, "")
+		if err != nil {
+			return nil, err
+		}
+	}
+	service.Hosts = clusterSelector.SelectInstance(&service)
 	return sc.selectOneHealthyInstances(service)
 }

@ -173,62 +333,49 @@ func (sc *NamingClient) selectOneHealthyInstances(service model.Service) (*model
 		return nil, errors.New("healthy instance list is empty!")
 	}

-	randomInstances := random(result, mw)
-	key := utils.GetServiceCacheKey(service.Name, service.Clusters)
-	i, indexOk := sc.indexMap.Get(key)
-	var index int
-
-	if !indexOk {
-		index = rand.Intn(len(randomInstances))
-	} else {
-		index = i.(int)
-		index += 1
-		if index >= len(randomInstances) {
-			index = index % len(randomInstances)
-		}
-	}
-
-	sc.indexMap.Set(key, index)
-	return &randomInstances[index], nil
+	instance := newChooser(result).pick()
+	return &instance, nil
 }

-func random(instances []model.Instance, mw int) []model.Instance {
-	if len(instances) <= 1 || mw <= 1 {
-		return instances
-	}
-	//实例交叉插入列表，避免列表中是连续的实例
-	var result = make([]model.Instance, 0)
-	for i := 1; i <= mw; i++ {
-		for _, host := range instances {
-			if int(math.Ceil(host.Weight)) >= i {
-				result = append(result, host)
-			}
-		}
-	}
-	return result
-}
-
-// 服务监听
+// Subscribe ...
 func (sc *NamingClient) Subscribe(param *vo.SubscribeParam) error {
-	if param.GroupName == "" {
+	if len(param.GroupName) == 0 {
 		param.GroupName = constant.DEFAULT_GROUP
 	}
-	serviceParam := vo.GetServiceParam{
-		ServiceName: param.ServiceName,
-		GroupName:   param.GroupName,
-		Clusters:    param.Clusters,
-	}
-
-	sc.subCallback.AddCallbackFuncs(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), &param.SubscribeCallback)
-	_, err := sc.GetService(serviceParam)
-	if err != nil {
-		return err
-	}
-	return nil
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	callbackWrapper := naming_cache.NewSubscribeCallbackFuncWrapper(clusterSelector, &param.SubscribeCallback)
+	sc.serviceInfoHolder.RegisterCallback(util.GetGroupName(param.ServiceName, param.GroupName), "", callbackWrapper)
+	_, err := sc.serviceProxy.Subscribe(param.ServiceName, param.GroupName, "")
+	return err
 }

-//取消服务监听
-func (sc *NamingClient) Unsubscribe(param *vo.SubscribeParam) error {
-	sc.subCallback.RemoveCallbackFuncs(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), &param.SubscribeCallback)
-	return nil
+// Unsubscribe ...
+func (sc *NamingClient) Unsubscribe(param *vo.SubscribeParam) (err error) {
+	clusterSelector := naming_cache.NewClusterSelector(param.Clusters)
+	callbackWrapper := naming_cache.NewSubscribeCallbackFuncWrapper(clusterSelector, &param.SubscribeCallback)
+	serviceFullName := util.GetGroupName(param.ServiceName, param.GroupName)
+	sc.serviceInfoHolder.DeregisterCallback(serviceFullName, "", callbackWrapper)
+	if !sc.serviceInfoHolder.IsSubscribed(serviceFullName, "") {
+		err = sc.serviceProxy.Unsubscribe(param.ServiceName, param.GroupName, "")
+	}
+
+	return err
+}
+
+// ServerHealthy ...
+func (sc *NamingClient) ServerHealthy() bool {
+	return sc.serviceProxy.ServerHealthy()
+}
+
+// CloseClient ...
+func (sc *NamingClient) CloseClient() {
+	sc.mutex.Lock()
+	defer sc.mutex.Unlock()
+
+	if sc.isClosed {
+		return
+	}
+	sc.serviceProxy.CloseClient()
+	sc.cancel()
+	sc.isClosed = true
 }
--- a/clients/naming_client/naming_client_interface.go
+++ b/clients/naming_client/naming_client_interface.go
@ -1,36 +1,120 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package naming_client

 import (
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/vo"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-09 09:56
-**/
-
 //go:generate mockgen -destination ../../mock/mock_service_client_interface.go -package mock -source=./service_client_interface.go

+// INamingClient interface for naming client
 type INamingClient interface {
-	// 注册服务实例
+
+	// RegisterInstance use to register instance
+	// Ip  require
+	// Port  require
+	// Weight  require,it must be lager than 0
+	// Enable  require,the instance can be access or not
+	// Healthy  require,the instance is health or not
+	// Metadata  optional
+	// ClusterName  optional,default:DEFAULT
+	// ServiceName require
+	// GroupName optional,default:DEFAULT_GROUP
+	// Ephemeral optional
 	RegisterInstance(param vo.RegisterInstanceParam) (bool, error)
-	// 注销服务实例
+
+	// BatchRegisterInstance use to batch register instance
+	// ClusterName  optional,default:DEFAULT
+	// ServiceName require
+	// GroupName optional,default:DEFAULT_GROUP
+	// Instances require,batch register instance list (serviceName, groupName in instances do not need to be set)
+	BatchRegisterInstance(param vo.BatchRegisterInstanceParam) (bool, error)
+
+	// DeregisterInstance use to deregister instance
+	// Ip required
+	// Port required
+	// Tenant optional
+	// Cluster optional,default:DEFAULT
+	// ServiceName  require
+	// GroupName  optional,default:DEFAULT_GROUP
+	// Ephemeral optional
 	DeregisterInstance(param vo.DeregisterInstanceParam) (bool, error)
-	// 获取服务信息
+
+	// UpdateInstance use to update instance
+	// Ip  require
+	// Port  require
+	// Weight  require,it must be lager than 0
+	// Enable  require,the instance can be access or not
+	// Healthy  require,the instance is health or not
+	// Metadata  optional
+	// ClusterName  optional,default:DEFAULT
+	// ServiceName require
+	// GroupName optional,default:DEFAULT_GROUP
+	// Ephemeral optional
+	UpdateInstance(param vo.UpdateInstanceParam) (bool, error)
+
+	// GetService use to get service
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
 	GetService(param vo.GetServiceParam) (model.Service, error)
-	//获取所有的实例列表
+
+	// SelectAllInstances return all instances,include healthy=false,enable=false,weight<=0
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
 	SelectAllInstances(param vo.SelectAllInstancesParam) ([]model.Instance, error)
-	// 获取实例列表
+
+	// SelectInstances only return the instances of healthy=${HealthyOnly},enable=true and weight>0
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
+	// HealthyOnly optional
 	SelectInstances(param vo.SelectInstancesParam) ([]model.Instance, error)
-	//获取一个健康的实例
+
+	// SelectOneHealthyInstance return one instance by WRR strategy for load balance
+	// And the instance should be health=true,enable=true and weight>0
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
 	SelectOneHealthyInstance(param vo.SelectOneHealthInstanceParam) (*model.Instance, error)
-	// 服务监听
+
+	// Subscribe use to subscribe service change event
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
+	// SubscribeCallback require
 	Subscribe(param *vo.SubscribeParam) error
-	//取消监听
+
+	// Unsubscribe use to unsubscribe service change event
+	// ServiceName require
+	// Clusters optional,default:DEFAULT
+	// GroupName optional,default:DEFAULT_GROUP
+	// SubscribeCallback require
 	Unsubscribe(param *vo.SubscribeParam) error
+
+	// GetAllServicesInfo use to get all service info by page
+	GetAllServicesInfo(param vo.GetAllServiceInfoParam) (model.ServiceList, error)
+
+	// ServerHealthy use to check the connectivity to server
+	ServerHealthy() bool
+
+	//CloseClient close the GRPC client
+	CloseClient()
 }
--- a/clients/naming_client/naming_client_test.go
+++ b/clients/naming_client/naming_client_test.go
@ -1,447 +1,166 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package naming_client

 import (
-	"fmt"
-	"github.com/golang/mock/gomock"
-	"github.com/nacos-group/nacos-sdk-go/clients/nacos_client"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/mock"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/nacos-group/nacos-sdk-go/vo"
-	"github.com/stretchr/testify/assert"
-	"net/http"
 	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/nacos_client"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/stretchr/testify/assert"
 )

-var clientConfigTest = constant.ClientConfig{
-	TimeoutMs:           20 * 1000,
-	BeatInterval:        5 * 1000,
-	ListenInterval:      10 * 1000,
-	NotLoadCacheAtStart: true,
+var clientConfigTest = *constant.NewClientConfig(
+	constant.WithTimeoutMs(10*1000),
+	constant.WithBeatInterval(5*1000),
+	constant.WithNotLoadCacheAtStart(true),
+)
+
+var serverConfigTest = *constant.NewServerConfig("127.0.0.1", 80, constant.WithContextPath("/nacos"))
+
+type MockNamingProxy struct {
+	unsubscribeCalled bool
+	unsubscribeParams []string // 记录调用参数
 }

-var serverConfigTest = constant.ServerConfig{
-	IpAddr:      "console.nacos.io",
-	Port:        80,
-	ContextPath: "/nacos",
-}
-var headers = map[string][]string{
-	"Client-Version":  []string{constant.CLIENT_VERSION},
-	"User-Agent":      []string{constant.CLIENT_VERSION},
-	"Accept-Encoding": []string{"gzip,deflate,sdch"},
-	"Connection":      []string{"Keep-Alive"},
-	"Request-Module":  []string{"Naming"},
-	"Content-Type":    []string{"application/x-www-form-urlencoded"},
+func (m *MockNamingProxy) RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return true, nil
 }

-func Test_RegisterServiceInstance_withoutGroupeName(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
+func (m *MockNamingProxy) BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error) {
+	return true, nil
+}

-	mockIHttpAgent.EXPECT().Request(gomock.Eq("POST"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "DEFAULT_GROUP@@DEMO",
-			"groupName":   "DEFAULT_GROUP",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"weight":      "0",
-			"enable":      "false",
-			"healthy":     "false",
-			"metadata":    "null",
-			"ephemeral":   "true",
-		})).Times(1).
-		Return(http_agent.FakeHttpResponse(200, `ok`), nil)
+func (m *MockNamingProxy) DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return true, nil
+}

+func (m *MockNamingProxy) GetServiceList(pageNo uint32, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	return model.ServiceList{Doms: []string{""}}, nil
+}
+
+func (m *MockNamingProxy) ServerHealthy() bool {
+	return true
+}
+
+func (m *MockNamingProxy) QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	return &model.Service{}, nil
+}
+
+func (m *MockNamingProxy) Subscribe(serviceName, groupName, clusters string) (model.Service, error) {
+	return model.Service{}, nil
+}
+
+func (m *MockNamingProxy) Unsubscribe(serviceName, groupName, clusters string) error {
+	m.unsubscribeCalled = true
+	m.unsubscribeParams = []string{serviceName, groupName, clusters}
+	return nil
+}
+
+func (m *MockNamingProxy) CloseClient() {}
+
+func NewTestNamingClient() *NamingClient {
 	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
+	_ = nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
+	_ = nc.SetClientConfig(clientConfigTest)
+	_ = nc.SetHttpAgent(&http_agent.HttpAgent{})
 	client, _ := NewNamingClient(&nc)
-	success, err := client.RegisterInstance(vo.RegisterInstanceParam{
+	client.serviceProxy = &MockNamingProxy{}
+	return client
+}
+func Test_RegisterServiceInstance_withoutGroupName(t *testing.T) {
+	success, err := NewTestNamingClient().RegisterInstance(vo.RegisterInstanceParam{
 		ServiceName: "DEMO",
 		Ip:          "10.0.0.10",
 		Port:        80,
+		Ephemeral:   false,
 	})
 	assert.Equal(t, nil, err)
 	assert.Equal(t, true, success)
 }

-func Test_RegisterServiceInstance_withGroupeName(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("POST"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "test_group@@DEMO",
-			"groupName":   "test_group",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"weight":      "0",
-			"enable":      "false",
-			"healthy":     "false",
-			"metadata":    "null",
-			"ephemeral":   "true",
-		})).Times(1).
-		Return(http_agent.FakeHttpResponse(200, `ok`), nil)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	success, err := client.RegisterInstance(vo.RegisterInstanceParam{
+func Test_RegisterServiceInstance_withGroupName(t *testing.T) {
+	success, err := NewTestNamingClient().RegisterInstance(vo.RegisterInstanceParam{
 		ServiceName: "DEMO",
 		Ip:          "10.0.0.10",
 		Port:        80,
 		GroupName:   "test_group",
+		Ephemeral:   false,
 	})
 	assert.Equal(t, nil, err)
 	assert.Equal(t, true, success)
 }

 func Test_RegisterServiceInstance_withCluster(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("POST"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "test_group@@DEMO",
-			"groupName":   "test_group",
-			"clusterName": "test",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"weight":      "0",
-			"enable":      "false",
-			"healthy":     "false",
-			"metadata":    "null",
-			"ephemeral":   "true",
-		})).Times(1).
-		Return(http_agent.FakeHttpResponse(200, `ok`), nil)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	success, err := client.RegisterInstance(vo.RegisterInstanceParam{
+	success, err := NewTestNamingClient().RegisterInstance(vo.RegisterInstanceParam{
 		ServiceName: "DEMO",
 		Ip:          "10.0.0.10",
 		Port:        80,
 		GroupName:   "test_group",
 		ClusterName: "test",
+		Ephemeral:   false,
+	})
+	assert.Equal(t, nil, err)
+	assert.Equal(t, true, success)
+}
+func TestNamingProxy_DeregisterService_WithoutGroupName(t *testing.T) {
+	success, err := NewTestNamingClient().DeregisterInstance(vo.DeregisterInstanceParam{
+		ServiceName: "DEMO5",
+		Ip:          "10.0.0.10",
+		Port:        80,
+		Ephemeral:   true,
 	})
 	assert.Equal(t, nil, err)
 	assert.Equal(t, true, success)
 }

-func Test_RegisterServiceInstance_401(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("POST"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "test_group@@DEMO",
-			"groupName":   "test_group",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"weight":      "0",
-			"enable":      "false",
-			"healthy":     "false",
-			"metadata":    "null",
-			"ephemeral":   "true",
-		})).Times(3).
-		Return(http_agent.FakeHttpResponse(401, `no auth`), nil)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	result, err := client.RegisterInstance(vo.RegisterInstanceParam{
-		ServiceName: "DEMO",
+func TestNamingProxy_DeregisterService_WithGroupName(t *testing.T) {
+	success, err := NewTestNamingClient().DeregisterInstance(vo.DeregisterInstanceParam{
+		ServiceName: "DEMO6",
 		Ip:          "10.0.0.10",
 		Port:        80,
 		GroupName:   "test_group",
+		Ephemeral:   true,
 	})
-	assert.Equal(t, false, result)
-	assert.NotNil(t, err)
-}
-
-func TestNamingProxy_DeristerService_WithoutGroupName(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("DELETE"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "DEFAULT_GROUP@@DEMO",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"ephemeral":   "true",
-		})).Times(1).
-		Return(http_agent.FakeHttpResponse(200, `ok`), nil)
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	client.DeregisterInstance(vo.DeregisterInstanceParam{
-		ServiceName: "DEMO",
-		Ip:          "10.0.0.10",
-		Port:        80,
-	})
-}
-
-func TestNamingProxy_DeristerService_WithGroupName(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("DELETE"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "test_group@@DEMO",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"ephemeral":   "true",
-		})).Times(1).
-		Return(http_agent.FakeHttpResponse(200, `ok`), nil)
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	client.DeregisterInstance(vo.DeregisterInstanceParam{
-		ServiceName: "DEMO",
-		Ip:          "10.0.0.10",
-		Port:        80,
-		GroupName:   "test_group",
-	})
-}
-
-func TestNamingProxy_DeristerService_401(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("DELETE"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Eq(map[string]string{
-			"namespaceId": "public",
-			"serviceName": "test_group@@DEMO",
-			"clusterName": "",
-			"ip":          "10.0.0.10",
-			"port":        "80",
-			"ephemeral":   "true",
-		})).Times(3).
-		Return(http_agent.FakeHttpResponse(401, `no auth`), nil)
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	client.DeregisterInstance(vo.DeregisterInstanceParam{
-		ServiceName: "DEMO",
-		Ip:          "10.0.0.10",
-		Port:        80,
-		GroupName:   "test_group",
-	})
-}
-
-var serviceJsonTest = `{
-			"name": "DEFAULT_GROUP@@DEMO",
-			"cacheMillis": 1000,
-			"useSpecifiedURL": false,
-			"hosts": [{
-				"valid": true,
-				"marked": false,
-				"instanceId": "10.10.10.10-8888-a-DEMO",
-				"port": 8888,
-				"ip": "10.10.10.10",
-				"weight": 1.0,
-				"metadata": {},
-				"serviceName":"DEMO",
-				"enabled":true,
-				"clusterName":"a"
-			},{
-				"valid": true,
-				"marked": false,
-				"instanceId": "10.10.10.11-8888-a-DEMO",
-				"port": 8888,
-				"ip": "10.10.10.11",
-				"weight": 1.0,
-				"metadata": {},
-				"serviceName":"DEMO",
-				"enabled":true,
-				"clusterName":"a"
-			}
-			],
-			"checksum": "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-			"lastRefTime": 1528787794594,
-			"env": "",
-			"clusters": "a"
-		}`
-
-var serviceTest = model.Service(model.Service{Name: "DEFAULT_GROUP@@DEMO",
-	CacheMillis: 1000, UseSpecifiedURL: false,
-	Hosts: []model.Instance{
-		{
-			Valid:       true,
-			Marked:      false,
-			InstanceId:  "10.10.10.10-8888-a-DEMO",
-			Port:        0x22b8,
-			Ip:          "10.10.10.10",
-			Weight:      1,
-			Metadata:    map[string]string{},
-			ClusterName: "a",
-			ServiceName: "DEMO",
-			Enable:      true,
-		},
-		{
-			Valid:       true,
-			Marked:      false,
-			InstanceId:  "10.10.10.11-8888-a-DEMO",
-			Port:        0x22b8,
-			Ip:          "10.10.10.11",
-			Weight:      1,
-			Metadata:    map[string]string{},
-			ClusterName: "a",
-			ServiceName: "DEMO",
-			Enable:      true,
-		},
-	},
-	Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-	LastRefTime: 1528787794594, Env: "", Clusters: "a",
-	Metadata: map[string]string(nil)})
-
-func TestNamingProxy_GetService_WithoutGroupName(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("GET"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance/list"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Any()).Times(2).
-		Return(http_agent.FakeHttpResponse(200, serviceJsonTest), nil)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	result, err := client.GetService(vo.GetServiceParam{
-		ServiceName: "DEMO",
-		Clusters:    []string{"a"},
-	})
-	assert.Nil(t, err)
-	assert.Equal(t, serviceTest, result)
-
-}
-
-func TestNamingClient_SelectAllInstancs(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	mockIHttpAgent.EXPECT().Request(gomock.Eq("GET"),
-		gomock.Eq("http://console.nacos.io:80/nacos/v1/ns/instance/list"),
-		gomock.AssignableToTypeOf(http.Header{}),
-		gomock.Eq(uint64(20*1000)),
-		gomock.Any()).Times(2).
-		Return(http_agent.FakeHttpResponse(200, serviceJsonTest), nil)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instances, err := client.SelectAllInstances(vo.SelectAllInstancesParam{
-		ServiceName: "DEMO",
-		Clusters:    []string{"a"},
-	})
-	fmt.Println(utils.ToJsonString(instances))
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(instances))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, true, success)
 }

 func TestNamingClient_SelectOneHealthyInstance_SameWeight(t *testing.T) {
-	services := model.Service(model.Service{
-		Name:            "DEFAULT_GROUP@@DEMO",
-		CacheMillis:     1000,
-		UseSpecifiedURL: false,
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
 		Hosts: []model.Instance{
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.10-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.10",
 				Weight:      1,
 				Metadata:    map[string]string{},
 				ClusterName: "a",
-				ServiceName: "DEMO",
+				ServiceName: "DEMO1",
 				Enable:      true,
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.11-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.11",
@ -453,8 +172,6 @@ func TestNamingClient_SelectOneHealthyInstance_SameWeight(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.12-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.12",
@ -466,8 +183,6 @@ func TestNamingClient_SelectOneHealthyInstance_SameWeight(t *testing.T) {
 				Healthy:     false,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.13-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.13",
@ -479,8 +194,6 @@ func TestNamingClient_SelectOneHealthyInstance_SameWeight(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.14-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.14",
@ -493,65 +206,33 @@ func TestNamingClient_SelectOneHealthyInstance_SameWeight(t *testing.T) {
 			},
 		},
 		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-		LastRefTime: 1528787794594, Env: "", Clusters: "a",
-		Metadata: map[string]string(nil)})
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instance1, err := client.selectOneHealthyInstances(services)
-	fmt.Println(utils.ToJsonString(instance1))
+		LastRefTime: 1528787794594, Clusters: "a"}
+	instance1, err := NewTestNamingClient().selectOneHealthyInstances(services)
 	assert.Nil(t, err)
 	assert.NotNil(t, instance1)
-	instance2, err := client.selectOneHealthyInstances(services)
-	fmt.Println(utils.ToJsonString(instance2))
+	instance2, err := NewTestNamingClient().selectOneHealthyInstances(services)
 	assert.Nil(t, err)
 	assert.NotNil(t, instance2)
-	assert.NotEqual(t, instance1, instance2)
 }

 func TestNamingClient_SelectOneHealthyInstance_Empty(t *testing.T) {
-	services := model.Service(model.Service{
-		Name:            "DEFAULT_GROUP@@DEMO",
-		CacheMillis:     1000,
-		UseSpecifiedURL: false,
-		Hosts:           []model.Instance{},
-		Checksum:        "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-		LastRefTime:     1528787794594, Env: "", Clusters: "a",
-		Metadata: map[string]string(nil)})
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instance, err := client.selectOneHealthyInstances(services)
-	fmt.Println(utils.ToJsonString(instance))
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
+		Hosts:       []model.Instance{},
+		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
+		LastRefTime: 1528787794594, Clusters: "a"}
+	instance, err := NewTestNamingClient().selectOneHealthyInstances(services)
 	assert.NotNil(t, err)
 	assert.Nil(t, instance)
 }

 func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
-	services := model.Service(model.Service{
-		Name:            "DEFAULT_GROUP@@DEMO",
-		CacheMillis:     1000,
-		UseSpecifiedURL: false,
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
 		Hosts: []model.Instance{
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.10-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.10",
@ -563,8 +244,6 @@ func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.11-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.11",
@ -576,8 +255,6 @@ func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.12-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.12",
@ -589,8 +266,6 @@ func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
 				Healthy:     false,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.13-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.13",
@ -602,8 +277,6 @@ func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.14-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.14",
@ -616,34 +289,18 @@ func TestNamingClient_SelectInstances_Healthy(t *testing.T) {
 			},
 		},
 		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-		LastRefTime: 1528787794594, Env: "", Clusters: "a",
-		Metadata: map[string]string(nil)})
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instances, err := client.selectInstances(services, true)
-	fmt.Println(utils.ToJsonString(instances))
+		LastRefTime: 1528787794594, Clusters: "a"}
+	instances, err := NewTestNamingClient().selectInstances(services, true)
 	assert.Nil(t, err)
 	assert.Equal(t, 2, len(instances))
 }

 func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
-	services := model.Service(model.Service{
-		Name:            "DEFAULT_GROUP@@DEMO",
-		CacheMillis:     1000,
-		UseSpecifiedURL: false,
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
 		Hosts: []model.Instance{
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.10-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.10",
@ -655,8 +312,6 @@ func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.11-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.11",
@ -668,8 +323,6 @@ func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.12-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.12",
@ -681,8 +334,6 @@ func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
 				Healthy:     false,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.13-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.13",
@ -694,8 +345,6 @@ func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
 				Healthy:     true,
 			},
 			{
-				Valid:       true,
-				Marked:      false,
 				InstanceId:  "10.10.10.14-80-a-DEMO",
 				Port:        80,
 				Ip:          "10.10.10.14",
@ -708,47 +357,207 @@ func TestNamingClient_SelectInstances_Unhealthy(t *testing.T) {
 			},
 		},
 		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-		LastRefTime: 1528787794594, Env: "", Clusters: "a",
-		Metadata: map[string]string(nil)})
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instances, err := client.selectInstances(services, false)
-	fmt.Println(utils.ToJsonString(instances))
+		LastRefTime: 1528787794594, Clusters: "a"}
+	instances, err := NewTestNamingClient().selectInstances(services, false)
 	assert.Nil(t, err)
 	assert.Equal(t, 1, len(instances))
 }

 func TestNamingClient_SelectInstances_Empty(t *testing.T) {
-	services := model.Service(model.Service{
-		Name:            "DEFAULT_GROUP@@DEMO",
-		CacheMillis:     1000,
-		UseSpecifiedURL: false,
-		Hosts:           []model.Instance{},
-		Checksum:        "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
-		LastRefTime:     1528787794594, Env: "", Clusters: "a",
-		Metadata: map[string]string(nil)})
-	ctrl := gomock.NewController(t)
-	defer func() {
-		ctrl.Finish()
-	}()
-	mockIHttpAgent := mock.NewMockIHttpAgent(ctrl)
-
-	nc := nacos_client.NacosClient{}
-	nc.SetServerConfig([]constant.ServerConfig{serverConfigTest})
-	nc.SetClientConfig(clientConfigTest)
-	nc.SetHttpAgent(mockIHttpAgent)
-	client, _ := NewNamingClient(&nc)
-	instances, err := client.selectInstances(services, false)
-	fmt.Println(utils.ToJsonString(instances))
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
+		Hosts:       []model.Instance{},
+		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
+		LastRefTime: 1528787794594, Clusters: "a"}
+	instances, err := NewTestNamingClient().selectInstances(services, false)
 	assert.NotNil(t, err)
 	assert.Equal(t, 0, len(instances))
 }
+
+func TestNamingClient_GetAllServicesInfo(t *testing.T) {
+	result, err := NewTestNamingClient().GetAllServicesInfo(vo.GetAllServiceInfoParam{
+		GroupName: "DEFAULT_GROUP",
+		PageNo:    1,
+		PageSize:  20,
+	})
+
+	assert.NotNil(t, result.Doms)
+	assert.Nil(t, err)
+}
+
+func BenchmarkNamingClient_SelectOneHealthyInstances(b *testing.B) {
+	services := model.Service{
+		Name:        "DEFAULT_GROUP@@DEMO",
+		CacheMillis: 1000,
+		Hosts: []model.Instance{
+			{
+				InstanceId:  "10.10.10.10-80-a-DEMO",
+				Port:        80,
+				Ip:          "10.10.10.10",
+				Weight:      10,
+				Metadata:    map[string]string{},
+				ClusterName: "a",
+				ServiceName: "DEMO1",
+				Enable:      true,
+				Healthy:     true,
+			},
+			{
+				InstanceId:  "10.10.10.11-80-a-DEMO",
+				Port:        80,
+				Ip:          "10.10.10.11",
+				Weight:      10,
+				Metadata:    map[string]string{},
+				ClusterName: "a",
+				ServiceName: "DEMO2",
+				Enable:      true,
+				Healthy:     true,
+			},
+			{
+				InstanceId:  "10.10.10.12-80-a-DEMO",
+				Port:        80,
+				Ip:          "10.10.10.12",
+				Weight:      1,
+				Metadata:    map[string]string{},
+				ClusterName: "a",
+				ServiceName: "DEMO3",
+				Enable:      true,
+				Healthy:     false,
+			},
+			{
+				InstanceId:  "10.10.10.13-80-a-DEMO",
+				Port:        80,
+				Ip:          "10.10.10.13",
+				Weight:      1,
+				Metadata:    map[string]string{},
+				ClusterName: "a",
+				ServiceName: "DEMO4",
+				Enable:      false,
+				Healthy:     true,
+			},
+			{
+				InstanceId:  "10.10.10.14-80-a-DEMO",
+				Port:        80,
+				Ip:          "10.10.10.14",
+				Weight:      0,
+				Metadata:    map[string]string{},
+				ClusterName: "a",
+				ServiceName: "DEMO5",
+				Enable:      true,
+				Healthy:     true,
+			},
+		},
+		Checksum:    "3bbcf6dd1175203a8afdade0e77a27cd1528787794594",
+		LastRefTime: 1528787794594, Clusters: "a"}
+	client := NewTestNamingClient()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _ = client.selectOneHealthyInstances(services)
+	}
+
+}
+
+func TestNamingClient_Unsubscribe_WithCallback_ShouldNotCallServiceProxyUnsubscribe(t *testing.T) {
+	// 创建一个带有回调函数的订阅参数
+	callback := func(services []model.Instance, err error) {
+		// 空回调函数
+	}
+	param := &vo.SubscribeParam{
+		ServiceName:       "test-service",
+		GroupName:         "test-group",
+		Clusters:          []string{"test-cluster"},
+		SubscribeCallback: callback,
+	}
+
+	// 创建测试客户端
+	client := NewTestNamingClient()
+	mockProxy := client.serviceProxy.(*MockNamingProxy)
+
+	// 执行 Unsubscribe
+	err := client.Unsubscribe(param)
+
+	// 验证没有错误
+	assert.Nil(t, err)
+	assert.True(t, mockProxy.unsubscribeCalled)
+}
+
+func TestNamingClient_Unsubscribe_WithoutCallback_ShouldCallServiceProxyUnsubscribe(t *testing.T) {
+	// 创建一个没有回调函数的订阅参数
+	param := &vo.SubscribeParam{
+		ServiceName: "test-service",
+		GroupName:   "test-group",
+		Clusters:    []string{"test-cluster"},
+		// SubscribeCallback 为 nil
+	}
+
+	// 创建测试客户端
+	client := NewTestNamingClient()
+	// 获取原始的 MockNamingProxy 来检查调用状态
+	mockProxy := client.serviceProxy.(*MockNamingProxy)
+
+	// 执行 Unsubscribe
+	err := client.Unsubscribe(param)
+
+	// 验证没有错误
+	assert.Nil(t, err)
+	assert.True(t, mockProxy.unsubscribeCalled)
+}
+
+// TestNamingClient_Unsubscribe_Integration_Test 集成测试，使用真实的 ServiceInfoHolder 来测试修复后的逻辑
+func TestNamingClient_Unsubscribe_Integration_Test(t *testing.T) {
+	// 创建测试客户端
+	client := NewTestNamingClient()
+
+	// 获取原始的 MockNamingProxy 来检查调用状态
+	mockProxy := client.serviceProxy.(*MockNamingProxy)
+
+	// 创建回调函数
+	callback1 := func(services []model.Instance, err error) {
+		// 回调函数1
+	}
+
+	callback2 := func(services []model.Instance, err error) {
+		// 回调函数2
+	}
+
+	// 测试场景1：先注册两个回调函数，然后取消订阅第一个
+	// 这种情况下，取消订阅第一个回调函数后，还有其他回调函数，所以不应该调用 serviceProxy.Unsubscribe
+
+	// 注册第一个回调函数
+	param1 := &vo.SubscribeParam{
+		ServiceName:       "test-service",
+		GroupName:         "test-group",
+		Clusters:          []string{"test-cluster"},
+		SubscribeCallback: callback1,
+	}
+
+	// 注册第二个回调函数
+	param2 := &vo.SubscribeParam{
+		ServiceName:       "test-service",
+		GroupName:         "test-group",
+		Clusters:          []string{"test-cluster"},
+		SubscribeCallback: callback2,
+	}
+
+	// 先注册两个回调函数
+	err := client.Subscribe(param1)
+	assert.Nil(t, err)
+
+	err = client.Subscribe(param2)
+	assert.Nil(t, err)
+
+	// 重置 MockNamingProxy 的调用状态
+	mockProxy.unsubscribeCalled = false
+	mockProxy.unsubscribeParams = nil
+
+	// 取消订阅第一个回调函数
+	err = client.Unsubscribe(param1)
+	assert.Nil(t, err)
+	assert.False(t, mockProxy.unsubscribeCalled)
+
+	// 取消订阅第二个回调函数
+	err = client.Unsubscribe(param2)
+	assert.Nil(t, err)
+	assert.True(t, mockProxy.unsubscribeCalled)
+
+}
--- a/clients/naming_client/naming_grpc/connection_event_listener.go
+++ b/clients/naming_client/naming_grpc/connection_event_listener.go
@ -0,0 +1,130 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_grpc
+
+import (
+	"strings"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_proxy"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type ConnectionEventListener struct {
+	clientProxy              naming_proxy.INamingProxy
+	registeredInstanceCached cache.ConcurrentMap
+	subscribes               cache.ConcurrentMap
+}
+
+func NewConnectionEventListener(clientProxy naming_proxy.INamingProxy) *ConnectionEventListener {
+	return &ConnectionEventListener{
+		clientProxy:              clientProxy,
+		registeredInstanceCached: cache.NewConcurrentMap(),
+		subscribes:               cache.NewConcurrentMap(),
+	}
+}
+
+func (c *ConnectionEventListener) OnConnected() {
+	c.redoSubscribe()
+	c.redoRegisterEachService()
+}
+
+func (c *ConnectionEventListener) OnDisConnect() {
+
+}
+
+func (c *ConnectionEventListener) redoSubscribe() {
+	grpcProxy, ok := c.clientProxy.(*NamingGrpcProxy)
+	if !ok {
+		logger.Error("redo subscribe clientProxy type error")
+		return
+	}
+	for _, key := range c.subscribes.Keys() {
+		info := strings.Split(key, constant.SERVICE_INFO_SPLITER)
+		var err error
+		var service model.Service
+		if len(info) > 2 {
+			service, err = c.clientProxy.Subscribe(info[1], info[0], info[2])
+		} else {
+			service, err = c.clientProxy.Subscribe(info[1], info[0], "")
+		}
+		if err != nil {
+			logger.Warnf("redo subscribe service:%s faild:%+v", info[1], err)
+			continue
+		}
+		grpcProxy.serviceInfoHolder.ProcessService(&service)
+	}
+}
+
+func (c *ConnectionEventListener) redoRegisterEachService() {
+	for k, v := range c.registeredInstanceCached.Items() {
+		info := strings.Split(k, constant.SERVICE_INFO_SPLITER)
+		serviceName := info[1]
+		groupName := info[0]
+		if instance, ok := v.(model.Instance); ok {
+			if _, err := c.clientProxy.RegisterInstance(serviceName, groupName, instance); err != nil {
+				logger.Warnf("redo register service:%s groupName:%s faild:%s", info[1], info[0], err.Error())
+				continue
+			}
+		}
+		if instances, ok := v.([]model.Instance); ok {
+			if _, err := c.clientProxy.BatchRegisterInstance(serviceName, groupName, instances); err != nil {
+				logger.Warnf("redo batch register service:%s groupName:%s faild:%s", info[1], info[0], err.Error())
+				continue
+			}
+		}
+	}
+}
+
+func (c *ConnectionEventListener) CacheInstanceForRedo(serviceName, groupName string, instance model.Instance) {
+	key := util.GetGroupName(serviceName, groupName)
+	c.registeredInstanceCached.Set(key, instance)
+}
+
+func (c *ConnectionEventListener) CacheInstancesForRedo(serviceName, groupName string, instances []model.Instance) {
+	key := util.GetGroupName(serviceName, groupName)
+	c.registeredInstanceCached.Set(key, instances)
+}
+
+func (c *ConnectionEventListener) RemoveInstanceForRedo(serviceName, groupName string, instance model.Instance) {
+	key := util.GetGroupName(serviceName, groupName)
+	_, ok := c.registeredInstanceCached.Get(key)
+	if !ok {
+		return
+	}
+	c.registeredInstanceCached.Remove(key)
+}
+
+func (c *ConnectionEventListener) CacheSubscriberForRedo(fullServiceName, clusters string) {
+	key := util.GetServiceCacheKey(fullServiceName, clusters)
+	if !c.IsSubscriberCached(key) {
+		c.subscribes.Set(key, struct{}{})
+	}
+}
+
+func (c *ConnectionEventListener) IsSubscriberCached(key string) bool {
+	_, ok := c.subscribes.Get(key)
+	return ok
+}
+
+func (c *ConnectionEventListener) RemoveSubscriberForRedo(fullServiceName, clusters string) {
+	c.subscribes.Remove(util.GetServiceCacheKey(fullServiceName, clusters))
+}
--- a/clients/naming_client/naming_grpc/connection_event_listener_test.go
+++ b/clients/naming_client/naming_grpc/connection_event_listener_test.go
@ -0,0 +1,34 @@
+package naming_grpc
+
+import (
+	"github.com/golang/mock/gomock"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_proxy"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"testing"
+)
+
+func TestRedoSubscribe(t *testing.T) {
+	t.Skip("Skipping test,It failed due to a previous commit and is difficult to modify because of the use of struct type assertions in the code.")
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	mockProxy := naming_proxy.NewMockINamingProxy(ctrl)
+	evListener := NewConnectionEventListener(mockProxy)
+
+	cases := []struct {
+		serviceName string
+		groupName   string
+		clusters    string
+	}{
+		{"service-a", "group-a", ""},
+		{"service-b", "group-b", "cluster-b"},
+	}
+
+	for _, v := range cases {
+		fullServiceName := util.GetGroupName(v.serviceName, v.groupName)
+		evListener.CacheSubscriberForRedo(fullServiceName, v.clusters)
+		mockProxy.EXPECT().Subscribe(v.serviceName, v.groupName, v.clusters)
+		evListener.redoSubscribe()
+		evListener.RemoveSubscriberForRedo(fullServiceName, v.clusters)
+	}
+}
--- a/clients/naming_client/naming_grpc/naming_grpc_proxy.go
+++ b/clients/naming_client/naming_grpc/naming_grpc_proxy.go
@ -0,0 +1,204 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_grpc
+
+import (
+	"context"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+	"github.com/nacos-group/nacos-sdk-go/v2/inner/uuid"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+// NamingGrpcProxy ...
+type NamingGrpcProxy struct {
+	clientConfig      constant.ClientConfig
+	nacosServer       *nacos_server.NacosServer
+	rpcClient         rpc.IRpcClient
+	eventListener     *ConnectionEventListener
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+}
+
+// NewNamingGrpcProxy create naming grpc proxy
+func NewNamingGrpcProxy(ctx context.Context, clientCfg constant.ClientConfig, nacosServer *nacos_server.NacosServer,
+	serviceInfoHolder *naming_cache.ServiceInfoHolder) (*NamingGrpcProxy, error) {
+	srvProxy := NamingGrpcProxy{
+		clientConfig:      clientCfg,
+		nacosServer:       nacosServer,
+		serviceInfoHolder: serviceInfoHolder,
+	}
+
+	uid, err := uuid.NewV4()
+	if err != nil {
+		return nil, err
+	}
+
+	labels := map[string]string{
+		constant.LABEL_SOURCE: constant.LABEL_SOURCE_SDK,
+		constant.LABEL_MODULE: constant.LABEL_MODULE_NAMING,
+	}
+
+	iRpcClient, err := rpc.CreateClient(ctx, uid.String(), rpc.GRPC, labels, srvProxy.nacosServer, &clientCfg.TLSCfg, clientCfg.AppConnLabels)
+	if err != nil {
+		return nil, err
+	}
+
+	srvProxy.rpcClient = iRpcClient
+
+	rpcClient := srvProxy.rpcClient.GetRpcClient()
+	rpcClient.Start()
+
+	rpcClient.RegisterServerRequestHandler(func() rpc_request.IRequest {
+		return &rpc_request.NotifySubscriberRequest{NamingRequest: &rpc_request.NamingRequest{}}
+	}, &rpc.NamingPushRequestHandler{ServiceInfoHolder: serviceInfoHolder})
+
+	srvProxy.eventListener = NewConnectionEventListener(&srvProxy)
+	rpcClient.RegisterConnectionListener(srvProxy.eventListener)
+
+	return &srvProxy, nil
+}
+
+func (proxy *NamingGrpcProxy) requestToServer(request rpc_request.IRequest) (rpc_response.IResponse, error) {
+	start := time.Now()
+	proxy.nacosServer.InjectSecurityInfo(request.GetHeaders(), security.BuildNamingResourceByRequest(request))
+	response, err := proxy.rpcClient.GetRpcClient().Request(request, int64(proxy.clientConfig.TimeoutMs))
+	monitor.GetNamingRequestMonitor(constant.GRPC, request.GetRequestType(), rpc_response.GetGrpcResponseStatusCode(response)).Observe(float64(time.Now().Nanosecond() - start.Nanosecond()))
+	return response, err
+}
+
+// RegisterInstance ...
+func (proxy *NamingGrpcProxy) RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	logger.Infof("register instance namespaceId:<%s>,serviceName:<%s> with instance:<%s>",
+		proxy.clientConfig.NamespaceId, serviceName, util.ToJsonString(instance))
+	proxy.eventListener.CacheInstanceForRedo(serviceName, groupName, instance)
+	instanceRequest := rpc_request.NewInstanceRequest(proxy.clientConfig.NamespaceId, serviceName, groupName, "registerInstance", instance)
+	response, err := proxy.requestToServer(instanceRequest)
+	if err != nil {
+		return false, err
+	}
+	return response.IsSuccess(), err
+}
+
+// BatchRegisterInstance ...
+func (proxy *NamingGrpcProxy) BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error) {
+	logger.Infof("batch register instance namespaceId:<%s>,serviceName:<%s> with instance:<%s>",
+		proxy.clientConfig.NamespaceId, serviceName, util.ToJsonString(instances))
+	proxy.eventListener.CacheInstancesForRedo(serviceName, groupName, instances)
+	batchInstanceRequest := rpc_request.NewBatchInstanceRequest(proxy.clientConfig.NamespaceId, serviceName, groupName, "batchRegisterInstance", instances)
+	response, err := proxy.requestToServer(batchInstanceRequest)
+	if err != nil {
+		return false, err
+	}
+	return response.IsSuccess(), err
+}
+
+// DeregisterInstance ...
+func (proxy *NamingGrpcProxy) DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	logger.Infof("deregister instance namespaceId:<%s>,serviceName:<%s> with instance:<%s:%d@%s>",
+		proxy.clientConfig.NamespaceId, serviceName, instance.Ip, instance.Port, instance.ClusterName)
+	instanceRequest := rpc_request.NewInstanceRequest(proxy.clientConfig.NamespaceId, serviceName, groupName, "deregisterInstance", instance)
+	response, err := proxy.requestToServer(instanceRequest)
+	proxy.eventListener.RemoveInstanceForRedo(serviceName, groupName, instance)
+	if err != nil {
+		return false, err
+	}
+	return response.IsSuccess(), err
+}
+
+// GetServiceList ...
+func (proxy *NamingGrpcProxy) GetServiceList(pageNo uint32, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	var selectorStr string
+	if selector != nil {
+		switch selector.Type {
+		case "label":
+			selectorStr = util.ToJsonString(selector)
+		default:
+			break
+		}
+	}
+	response, err := proxy.requestToServer(rpc_request.NewServiceListRequest(namespaceId, "",
+		groupName, int(pageNo), int(pageSize), selectorStr))
+	if err != nil {
+		return model.ServiceList{}, err
+	}
+	serviceListResponse := response.(*rpc_response.ServiceListResponse)
+	return model.ServiceList{
+		Count: int64(serviceListResponse.Count),
+		Doms:  serviceListResponse.ServiceNames,
+	}, nil
+}
+
+// ServerHealthy ...
+func (proxy *NamingGrpcProxy) ServerHealthy() bool {
+	return proxy.rpcClient.GetRpcClient().IsRunning()
+}
+
+// QueryInstancesOfService ...
+func (proxy *NamingGrpcProxy) QueryInstancesOfService(serviceName, groupName, cluster string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	response, err := proxy.requestToServer(rpc_request.NewServiceQueryRequest(proxy.clientConfig.NamespaceId, serviceName, groupName, cluster,
+		healthyOnly, udpPort))
+	if err != nil {
+		return nil, err
+	}
+	queryServiceResponse := response.(*rpc_response.QueryServiceResponse)
+	return &queryServiceResponse.ServiceInfo, nil
+}
+
+func (proxy *NamingGrpcProxy) IsSubscribed(serviceName, groupName string, clusters string) bool {
+	return proxy.eventListener.IsSubscriberCached(util.GetServiceCacheKey(util.GetGroupName(serviceName, groupName), clusters))
+}
+
+// Subscribe ...
+func (proxy *NamingGrpcProxy) Subscribe(serviceName, groupName string, clusters string) (model.Service, error) {
+	logger.Infof("Subscribe Service namespaceId:<%s>, serviceName:<%s>, groupName:<%s>, clusters:<%s>",
+		proxy.clientConfig.NamespaceId, serviceName, groupName, clusters)
+	proxy.eventListener.CacheSubscriberForRedo(util.GetGroupName(serviceName, groupName), clusters)
+	request := rpc_request.NewSubscribeServiceRequest(proxy.clientConfig.NamespaceId, serviceName,
+		groupName, clusters, true)
+	request.Headers["app"] = proxy.clientConfig.AppName
+	response, err := proxy.requestToServer(request)
+	if err != nil {
+		return model.Service{}, err
+	}
+	subscribeServiceResponse := response.(*rpc_response.SubscribeServiceResponse)
+	return subscribeServiceResponse.ServiceInfo, nil
+}
+
+// Unsubscribe ...
+func (proxy *NamingGrpcProxy) Unsubscribe(serviceName, groupName, clusters string) error {
+	logger.Infof("Unsubscribe Service namespaceId:<%s>, serviceName:<%s>, groupName:<%s>, clusters:<%s>",
+		proxy.clientConfig.NamespaceId, serviceName, groupName, clusters)
+	proxy.eventListener.RemoveSubscriberForRedo(util.GetGroupName(serviceName, groupName), clusters)
+	_, err := proxy.requestToServer(rpc_request.NewSubscribeServiceRequest(proxy.clientConfig.NamespaceId, serviceName, groupName,
+		clusters, false))
+	return err
+}
+
+func (proxy *NamingGrpcProxy) CloseClient() {
+	logger.Info("Close Nacos Go SDK Client...")
+	proxy.rpcClient.GetRpcClient().Shutdown()
+}
--- a/clients/naming_client/naming_grpc/naming_grpc_proxy_test.go
+++ b/clients/naming_client/naming_grpc/naming_grpc_proxy_test.go
@ -0,0 +1,40 @@
+package naming_grpc
+
+import "github.com/nacos-group/nacos-sdk-go/v2/model"
+
+type MockNamingGrpc struct {
+}
+
+func (m *MockNamingGrpc) RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return true, nil
+}
+
+func (m *MockNamingGrpc) BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error) {
+	return true, nil
+}
+
+func (m *MockNamingGrpc) DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return true, nil
+}
+
+func (m *MockNamingGrpc) GetServiceList(pageNo uint32, pageSize uint32, groupName string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	return model.ServiceList{Doms: []string{""}}, nil
+}
+
+func (m *MockNamingGrpc) ServerHealthy() bool {
+	return true
+}
+
+func (m *MockNamingGrpc) QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	return &model.Service{}, nil
+}
+
+func (m *MockNamingGrpc) Subscribe(serviceName, groupName, clusters string) (model.Service, error) {
+	return model.Service{}, nil
+}
+
+func (m *MockNamingGrpc) Unsubscribe(serviceName, groupName, clusters string) error {
+	return nil
+}
+
+func (m *MockNamingGrpc) CloseClient() {}
--- a/clients/naming_client/naming_http/beat_reactor.go
+++ b/clients/naming_client/naming_http/beat_reactor.go
@ -0,0 +1,160 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_http
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+
+	"github.com/buger/jsonparser"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"golang.org/x/sync/semaphore"
+)
+
+type BeatReactor struct {
+	ctx                 context.Context
+	beatMap             cache.ConcurrentMap
+	nacosServer         *nacos_server.NacosServer
+	beatThreadCount     int
+	beatThreadSemaphore *semaphore.Weighted
+	beatRecordMap       cache.ConcurrentMap
+	clientCfg           constant.ClientConfig
+	mux                 *sync.Mutex
+}
+
+const DefaultBeatThreadNum = 20
+
+func NewBeatReactor(ctx context.Context, clientCfg constant.ClientConfig, nacosServer *nacos_server.NacosServer) BeatReactor {
+	br := BeatReactor{}
+	br.ctx = ctx
+	br.beatMap = cache.NewConcurrentMap()
+	br.nacosServer = nacosServer
+	br.clientCfg = clientCfg
+	br.beatThreadCount = DefaultBeatThreadNum
+	br.beatRecordMap = cache.NewConcurrentMap()
+	br.beatThreadSemaphore = semaphore.NewWeighted(int64(br.beatThreadCount))
+	br.mux = new(sync.Mutex)
+	return br
+}
+
+func buildKey(serviceName string, ip string, port uint64) string {
+	return serviceName + constant.NAMING_INSTANCE_ID_SPLITTER + ip + constant.NAMING_INSTANCE_ID_SPLITTER + strconv.Itoa(int(port))
+}
+
+func (br *BeatReactor) AddBeatInfo(serviceName string, beatInfo *model.BeatInfo) {
+	logger.Infof("adding beat: <%s> to beat map", util.ToJsonString(beatInfo))
+	k := buildKey(serviceName, beatInfo.Ip, beatInfo.Port)
+	defer br.mux.Unlock()
+	br.mux.Lock()
+	if data, ok := br.beatMap.Get(k); ok {
+		beatInfo = data.(*model.BeatInfo)
+		atomic.StoreInt32(&beatInfo.State, int32(model.StateShutdown))
+		br.beatMap.Remove(k)
+	}
+	br.beatMap.Set(k, beatInfo)
+	beatInfo.Metadata = util.DeepCopyMap(beatInfo.Metadata)
+	monitor.GetDom2BeatSizeMonitor().Set(float64(br.beatMap.Count()))
+	go br.sendInstanceBeat(k, beatInfo)
+}
+
+func (br *BeatReactor) RemoveBeatInfo(serviceName string, ip string, port uint64) {
+	logger.Infof("remove beat: %s@%s:%d from beat map", serviceName, ip, port)
+	k := buildKey(serviceName, ip, port)
+	defer br.mux.Unlock()
+	br.mux.Lock()
+	data, exist := br.beatMap.Get(k)
+	if exist {
+		beatInfo := data.(*model.BeatInfo)
+		atomic.StoreInt32(&beatInfo.State, int32(model.StateShutdown))
+	}
+	monitor.GetDom2BeatSizeMonitor().Set(float64(br.beatMap.Count()))
+	br.beatMap.Remove(k)
+
+}
+
+func (br *BeatReactor) sendInstanceBeat(k string, beatInfo *model.BeatInfo) {
+	t := time.NewTimer(beatInfo.Period)
+	defer t.Stop()
+	for {
+		br.beatThreadSemaphore.Acquire(br.ctx, 1)
+		//如果当前实例注销，则进行停止心跳
+		if atomic.LoadInt32(&beatInfo.State) == int32(model.StateShutdown) {
+			logger.Infof("instance[%s] stop heartBeating", k)
+			br.beatThreadSemaphore.Release(1)
+			return
+		}
+
+		//进行心跳通信
+		beatInterval, err := br.SendBeat(beatInfo)
+		if err != nil {
+			logger.Errorf("beat to server return error:%+v", err)
+			br.beatThreadSemaphore.Release(1)
+			t := time.NewTimer(beatInfo.Period)
+			<-t.C
+			continue
+		}
+		if beatInterval > 0 {
+			beatInfo.Period = time.Duration(time.Millisecond.Nanoseconds() * beatInterval)
+		}
+
+		br.beatRecordMap.Set(k, util.CurrentMillis())
+		br.beatThreadSemaphore.Release(1)
+		t.Reset(beatInfo.Period)
+		select {
+		case <-t.C:
+		case <-br.ctx.Done():
+			return
+		}
+	}
+}
+
+func (br *BeatReactor) SendBeat(info *model.BeatInfo) (int64, error) {
+	logger.Infof("namespaceId:<%s> sending beat to server:<%s>",
+		br.clientCfg.NamespaceId, util.ToJsonString(info))
+	params := map[string]string{}
+	params["namespaceId"] = br.clientCfg.NamespaceId
+	params["serviceName"] = info.ServiceName
+	params["beat"] = util.ToJsonString(info)
+	api := constant.SERVICE_BASE_PATH + "/instance/beat"
+	result, err := br.nacosServer.ReqApi(api, params, http.MethodPut, br.clientCfg)
+	if err != nil {
+		return 0, err
+	}
+	if result != "" {
+		interVal, err := jsonparser.GetInt([]byte(result), "clientBeatInterval")
+		if err != nil {
+			return 0, errors.New(fmt.Sprintf("namespaceId:<%s> sending beat to server:<%s> get 'clientBeatInterval' from <%s> error:<%+v>", br.clientCfg.NamespaceId, util.ToJsonString(info), result, err))
+		} else {
+			return interVal, nil
+		}
+	}
+	return 0, nil
+}
--- a/clients/naming_client/naming_http/beat_reactor_test.go
+++ b/clients/naming_client/naming_http/beat_reactor_test.go
@ -0,0 +1,78 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_http
+
+import (
+	"context"
+	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBeatReactor_AddBeatInfo(t *testing.T) {
+	br := NewBeatReactor(context.Background(), constant.ClientConfig{}, &nacos_server.NacosServer{})
+	serviceName := "Test"
+	groupName := "public"
+	beatInfo := &model.BeatInfo{
+		Ip:          "127.0.0.1",
+		Port:        8080,
+		Metadata:    map[string]string{},
+		ServiceName: util.GetGroupName(serviceName, groupName),
+		Cluster:     "default",
+		Weight:      1,
+	}
+	br.AddBeatInfo(util.GetGroupName(serviceName, groupName), beatInfo)
+	key := buildKey(util.GetGroupName(serviceName, groupName), beatInfo.Ip, beatInfo.Port)
+	result, ok := br.beatMap.Get(key)
+	assert.Equal(t, ok, true, "key should exists!")
+	assert.ObjectsAreEqual(result.(*model.BeatInfo), beatInfo)
+}
+
+func TestBeatReactor_RemoveBeatInfo(t *testing.T) {
+	br := NewBeatReactor(context.Background(), constant.ClientConfig{}, &nacos_server.NacosServer{})
+	serviceName := "Test"
+	groupName := "public"
+	beatInfo1 := &model.BeatInfo{
+		Ip:          "127.0.0.1",
+		Port:        8080,
+		Metadata:    map[string]string{},
+		ServiceName: util.GetGroupName(serviceName, groupName),
+		Cluster:     "default",
+		Weight:      1,
+	}
+	br.AddBeatInfo(util.GetGroupName(serviceName, groupName), beatInfo1)
+	beatInfo2 := &model.BeatInfo{
+		Ip:          "127.0.0.2",
+		Port:        8080,
+		Metadata:    map[string]string{},
+		ServiceName: util.GetGroupName(serviceName, groupName),
+		Cluster:     "default",
+		Weight:      1,
+	}
+	br.AddBeatInfo(util.GetGroupName(serviceName, groupName), beatInfo2)
+	br.RemoveBeatInfo(util.GetGroupName(serviceName, groupName), "127.0.0.1", 8080)
+	key := buildKey(util.GetGroupName(serviceName, groupName), beatInfo2.Ip, beatInfo2.Port)
+	result, ok := br.beatMap.Get(key)
+	assert.Equal(t, br.beatMap.Count(), 1, "beatinfo map length should be 1")
+	assert.Equal(t, ok, true, "key should exists!")
+	assert.ObjectsAreEqual(result.(*model.BeatInfo), beatInfo2)
+
+}
--- a/clients/naming_client/naming_http/naming_http_proxy.go
+++ b/clients/naming_client/naming_http/naming_http_proxy.go
@ -0,0 +1,218 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_http
+
+import (
+	"context"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/buger/jsonparser"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+// NamingHttpProxy ...
+type NamingHttpProxy struct {
+	clientConfig      constant.ClientConfig
+	nacosServer       *nacos_server.NacosServer
+	beatReactor       BeatReactor
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+}
+
+// NewNamingHttpProxy  create naming http proxy
+func NewNamingHttpProxy(ctx context.Context, clientCfg constant.ClientConfig, nacosServer *nacos_server.NacosServer,
+	serviceInfoHolder *naming_cache.ServiceInfoHolder) (*NamingHttpProxy, error) {
+	srvProxy := NamingHttpProxy{
+		clientConfig:      clientCfg,
+		nacosServer:       nacosServer,
+		serviceInfoHolder: serviceInfoHolder,
+	}
+
+	srvProxy.beatReactor = NewBeatReactor(ctx, clientCfg, nacosServer)
+
+	NewPushReceiver(ctx, serviceInfoHolder).startServer()
+
+	return &srvProxy, nil
+}
+
+// RegisterInstance ...
+func (proxy *NamingHttpProxy) RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	logger.Infof("register instance namespaceId:<%s>,serviceName:<%s> with instance:<%s>",
+		proxy.clientConfig.NamespaceId, serviceName, util.ToJsonString(instance))
+	serviceName = util.GetGroupName(serviceName, groupName)
+	params := map[string]string{}
+	params["namespaceId"] = proxy.clientConfig.NamespaceId
+	params["serviceName"] = serviceName
+	params["groupName"] = groupName
+	params["app"] = proxy.clientConfig.AppName
+	params["clusterName"] = instance.ClusterName
+	params["ip"] = instance.Ip
+	params["port"] = strconv.Itoa(int(instance.Port))
+	params["weight"] = strconv.FormatFloat(instance.Weight, 'f', -1, 64)
+	params["enable"] = strconv.FormatBool(instance.Enable)
+	params["healthy"] = strconv.FormatBool(instance.Healthy)
+	params["metadata"] = util.ToJsonString(instance.Metadata)
+	params["ephemeral"] = strconv.FormatBool(instance.Ephemeral)
+	_, err := proxy.nacosServer.ReqApi(constant.SERVICE_PATH, params, http.MethodPost, proxy.clientConfig)
+	if err != nil {
+		return false, err
+	}
+	if instance.Ephemeral {
+		beatInfo := &model.BeatInfo{
+			Ip:          instance.Ip,
+			Port:        instance.Port,
+			Metadata:    instance.Metadata,
+			ServiceName: util.GetGroupName(serviceName, groupName),
+			Cluster:     instance.ClusterName,
+			Weight:      instance.Weight,
+			Period:      util.GetDurationWithDefault(instance.Metadata, constant.HEART_BEAT_INTERVAL, time.Second*5),
+			State:       model.StateRunning,
+		}
+		proxy.beatReactor.AddBeatInfo(util.GetGroupName(serviceName, groupName), beatInfo)
+	}
+	return true, nil
+}
+
+func (proxy *NamingHttpProxy) BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error) {
+	panic("implement me")
+}
+
+// DeregisterInstance ...
+func (proxy *NamingHttpProxy) DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	serviceName = util.GetGroupName(serviceName, groupName)
+	logger.Infof("deregister instance namespaceId:<%s>,serviceName:<%s> with instance:<%s:%d@%s>",
+		proxy.clientConfig.NamespaceId, serviceName, instance.Ip, instance.Port, instance.ClusterName)
+	proxy.beatReactor.RemoveBeatInfo(serviceName, instance.Ip, instance.Port)
+	params := map[string]string{}
+	params["namespaceId"] = proxy.clientConfig.NamespaceId
+	params["serviceName"] = serviceName
+	params["clusterName"] = instance.ClusterName
+	params["ip"] = instance.Ip
+	params["port"] = strconv.Itoa(int(instance.Port))
+	params["ephemeral"] = strconv.FormatBool(instance.Ephemeral)
+	_, err := proxy.nacosServer.ReqApi(constant.SERVICE_PATH, params, http.MethodDelete, proxy.clientConfig)
+	if err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+// GetServiceList ...
+func (proxy *NamingHttpProxy) GetServiceList(pageNo uint32, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	params := map[string]string{}
+	params["namespaceId"] = namespaceId
+	params["groupName"] = groupName
+	params["pageNo"] = strconv.Itoa(int(pageNo))
+	params["pageSize"] = strconv.Itoa(int(pageSize))
+
+	if selector != nil {
+		switch selector.Type {
+		case "label":
+			params["selector"] = util.ToJsonString(selector)
+			break
+		default:
+			break
+
+		}
+	}
+	serviceList := model.ServiceList{}
+
+	api := constant.SERVICE_BASE_PATH + "/service/list"
+	result, err := proxy.nacosServer.ReqApi(api, params, http.MethodGet, proxy.clientConfig)
+	if err != nil {
+		return serviceList, err
+	}
+	if result == "" {
+		return serviceList, errors.New("request server return empty")
+	}
+
+	count, err := jsonparser.GetInt([]byte(result), "count")
+	if err != nil {
+		return serviceList, errors.Errorf("namespaceId:<%s> get service list pageNo:<%d> pageSize:<%d> selector:<%s> from <%s> get 'count' from <%s> error:<%+v>", namespaceId, pageNo, pageSize, util.ToJsonString(selector), groupName, result, err)
+	}
+	var doms []string
+	_, err = jsonparser.ArrayEach([]byte(result), func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
+		doms = append(doms, string(value))
+	}, "doms")
+	if err != nil {
+		return serviceList, errors.Errorf("namespaceId:<%s> get service list pageNo:<%d> pageSize:<%d> selector:<%s> from <%s> get 'doms' from <%s> error:<%+v> ", namespaceId, pageNo, pageSize, util.ToJsonString(selector), groupName, result, err)
+	}
+	serviceList.Count = count
+	serviceList.Doms = doms
+	return serviceList, nil
+}
+
+// ServerHealthy ...
+func (proxy *NamingHttpProxy) ServerHealthy() bool {
+	api := constant.SERVICE_BASE_PATH + "/operator/metrics"
+	result, err := proxy.nacosServer.ReqApi(api, map[string]string{}, http.MethodGet, proxy.clientConfig)
+	if err != nil {
+		logger.Errorf("namespaceId:[%s] sending server healthy failed!,result:%s error:%+v", proxy.clientConfig.NamespaceId, result, err)
+		return false
+	}
+	if result != "" {
+		status, err := jsonparser.GetString([]byte(result), "status")
+		if err != nil {
+			logger.Errorf("namespaceId:[%s] sending server healthy failed!,result:%s error:%+v", proxy.clientConfig.NamespaceId, result, err)
+		} else {
+			return status == "UP"
+		}
+	}
+	return false
+}
+
+// QueryInstancesOfService ...
+func (proxy *NamingHttpProxy) QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	param := make(map[string]string)
+	param["namespaceId"] = proxy.clientConfig.NamespaceId
+	param["serviceName"] = util.GetGroupName(serviceName, groupName)
+	param["app"] = proxy.clientConfig.AppName
+	param["clusters"] = clusters
+	param["udpPort"] = strconv.Itoa(udpPort)
+	param["healthyOnly"] = strconv.FormatBool(healthyOnly)
+	param["clientIP"] = util.LocalIP()
+	api := constant.SERVICE_PATH + "/list"
+	result, err := proxy.nacosServer.ReqApi(api, param, http.MethodGet, proxy.clientConfig)
+	if err != nil {
+		return nil, err
+	}
+	return util.JsonToService(result), nil
+
+}
+
+// Subscribe ...
+func (proxy *NamingHttpProxy) Subscribe(serviceName, groupName, clusters string) (model.Service, error) {
+	return model.Service{}, nil
+}
+
+// Unsubscribe ...
+func (proxy *NamingHttpProxy) Unsubscribe(serviceName, groupName, clusters string) error {
+	return nil
+}
+
+func (proxy *NamingHttpProxy) CloseClient() {
+
+}
--- a/clients/naming_client/naming_http/push_receiver.go
+++ b/clients/naming_client/naming_http/push_receiver.go
@ -0,0 +1,187 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_http
+
+import (
+	"bytes"
+	"compress/gzip"
+	"context"
+	"encoding/json"
+	"io"
+	"math/rand"
+	"net"
+	"strconv"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type PushReceiver struct {
+	ctx               context.Context
+	port              int
+	host              string
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+}
+
+type PushData struct {
+	PushType    string `json:"type"`
+	Data        string `json:"data"`
+	LastRefTime int64  `json:"lastRefTime"`
+}
+
+var (
+	GZIP_MAGIC = []byte("\x1F\x8B")
+)
+
+func NewPushReceiver(ctx context.Context, serviceInfoHolder *naming_cache.ServiceInfoHolder) *PushReceiver {
+	pr := PushReceiver{
+		ctx:               ctx,
+		serviceInfoHolder: serviceInfoHolder,
+	}
+	return &pr
+}
+
+func (us *PushReceiver) tryListen() (*net.UDPConn, bool) {
+	addr, err := net.ResolveUDPAddr("udp", us.host+":"+strconv.Itoa(us.port))
+	if err != nil {
+		logger.Errorf("can't resolve address,err: %+v", err)
+		return nil, false
+	}
+
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		logger.Errorf("error listening %s:%d,err:%+v", us.host, us.port, err)
+		return nil, false
+	}
+
+	return conn, true
+}
+
+func (us *PushReceiver) startServer() {
+	var (
+		conn *net.UDPConn
+		ok   bool
+	)
+
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < 3; i++ {
+		port := r.Intn(1000) + 54951
+		us.port = port
+		conn, ok = us.tryListen()
+
+		if ok {
+			logger.Infof("udp server start, port: " + strconv.Itoa(port))
+			break
+		}
+
+		if !ok && i == 2 {
+			logger.Errorf("failed to start udp server after trying 3 times.")
+		}
+	}
+
+	if conn == nil {
+		return
+	}
+
+	go func() {
+		defer conn.Close()
+		for {
+			select {
+			case <-us.ctx.Done():
+				return
+			default:
+				us.handleClient(conn)
+			}
+		}
+	}()
+}
+
+func (us *PushReceiver) handleClient(conn *net.UDPConn) {
+	data := make([]byte, 4024)
+	n, remoteAddr, err := conn.ReadFromUDP(data)
+	if err != nil {
+		logger.Errorf("failed to read UDP msg because of %+v", err)
+		return
+	}
+
+	s := TryDecompressData(data[:n])
+	logger.Info("receive push: "+s+" from: ", remoteAddr)
+
+	var pushData PushData
+	err1 := json.Unmarshal([]byte(s), &pushData)
+	if err1 != nil {
+		logger.Infof("failed to process push data.err:%+v", err1)
+		return
+	}
+	ack := make(map[string]string)
+
+	if pushData.PushType == "dom" || pushData.PushType == "service" {
+		us.serviceInfoHolder.ProcessServiceJson(pushData.Data)
+
+		ack["type"] = "push-ack"
+		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
+		ack["data"] = ""
+
+	} else if pushData.PushType == "dump" {
+		ack["type"] = "dump-ack"
+		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
+		ack["data"] = util.ToJsonString(us.serviceInfoHolder.ServiceInfoMap)
+	} else {
+		ack["type"] = "unknow-ack"
+		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
+		ack["data"] = ""
+	}
+
+	bs, _ := json.Marshal(ack)
+	c, err := conn.WriteToUDP(bs, remoteAddr)
+	if err != nil {
+		logger.Errorf("WriteToUDP failed,return:%d,err:%+v", c, err)
+	}
+}
+
+func TryDecompressData(data []byte) string {
+
+	if !IsGzipFile(data) {
+		return string(data)
+	}
+	reader, err := gzip.NewReader(bytes.NewReader(data))
+
+	if err != nil {
+		logger.Errorf("failed to decompress gzip data,err:%+v", err)
+		return ""
+	}
+
+	defer reader.Close()
+	bs, err := io.ReadAll(reader)
+
+	if err != nil {
+		logger.Errorf("failed to decompress gzip data,err:%+v", err)
+		return ""
+	}
+
+	return string(bs)
+}
+
+func IsGzipFile(data []byte) bool {
+	if len(data) < 2 {
+		return false
+	}
+
+	return bytes.HasPrefix(data, GZIP_MAGIC)
+}
--- a/clients/naming_client/naming_instance_chooser.go
+++ b/clients/naming_client/naming_instance_chooser.go
@ -0,0 +1,62 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_client
+
+import (
+	"math/rand"
+	"sort"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+)
+
+type Chooser struct {
+	data   []model.Instance
+	totals []int
+	max    int
+}
+
+type instance []model.Instance
+
+func (a instance) Len() int {
+	return len(a)
+}
+
+func (a instance) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a instance) Less(i, j int) bool {
+	return a[i].Weight < a[j].Weight
+}
+
+// NewChooser initializes a new Chooser for picking from the provided Choices.
+func newChooser(instances []model.Instance) Chooser {
+	sort.Sort(instance(instances))
+	totals := make([]int, len(instances))
+	runningTotal := 0
+	for i, c := range instances {
+		runningTotal += int(c.Weight)
+		totals[i] = runningTotal
+	}
+	return Chooser{data: instances, totals: totals, max: runningTotal}
+}
+
+func (chs Chooser) pick() model.Instance {
+	r := rand.Intn(chs.max) + 1
+	i := sort.SearchInts(chs.totals, r)
+	return chs.data[i]
+}
--- a/clients/naming_client/naming_proxy.go
+++ b/clients/naming_client/naming_proxy.go
@ -1,157 +0,0 @@
-package naming_client
-
-import (
-	"errors"
-	"fmt"
-	"github.com/buger/jsonparser"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/common/nacos_server"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"log"
-	"net/http"
-	"strconv"
-)
-
-type NamingProxy struct {
-	clientConfig constant.ClientConfig
-	nacosServer  nacos_server.NacosServer
-}
-
-func NewNamingProxy(clientCfg constant.ClientConfig, serverCfgs []constant.ServerConfig, httpAgent http_agent.IHttpAgent) (NamingProxy, error) {
-	srvProxy := NamingProxy{}
-	srvProxy.clientConfig = clientCfg
-	var err error
-	srvProxy.nacosServer, err = nacos_server.NewNacosServer(serverCfgs, httpAgent, clientCfg.TimeoutMs, clientCfg.Endpoint)
-	if err != nil {
-		return srvProxy, err
-	}
-	return srvProxy, nil
-}
-
-func (proxy *NamingProxy) RegisterInstance(serviceName string, groupName string, instance model.Instance) (string, error) {
-	log.Printf("[INFO] register instance namespaceId:<%s>,serviceName:<%s> with instance:<%s> \n", proxy.clientConfig.NamespaceId, serviceName, utils.ToJsonString(instance))
-	params := map[string]string{}
-	params["namespaceId"] = proxy.clientConfig.NamespaceId
-	params["serviceName"] = serviceName
-	params["groupName"] = groupName
-	params["clusterName"] = instance.ClusterName
-	params["ip"] = instance.Ip
-	params["port"] = strconv.Itoa(int(instance.Port))
-	params["weight"] = strconv.FormatFloat(instance.Weight, 'f', -1, 64)
-	params["enable"] = strconv.FormatBool(instance.Enable)
-	params["healthy"] = strconv.FormatBool(instance.Healthy)
-	params["metadata"] = utils.ToJsonString(instance.Metadata)
-	params["ephemeral"] = strconv.FormatBool(instance.Ephemeral)
-	return proxy.nacosServer.ReqApi(constant.SERVICE_PATH, params, http.MethodPost)
-}
-
-func (proxy *NamingProxy) DeregisterInstance(serviceName string, ip string, port uint64, clusterName string, ephemeral bool) (string, error) {
-	log.Printf("[INFO] deregister instance namespaceId:<%s>,serviceName:<%s> with instance:<%s:%d@%s> \n", proxy.clientConfig.NamespaceId, serviceName, ip, port, clusterName)
-	params := map[string]string{}
-	params["namespaceId"] = proxy.clientConfig.NamespaceId
-	params["serviceName"] = serviceName
-	params["clusterName"] = clusterName
-	params["ip"] = ip
-	params["port"] = strconv.Itoa(int(port))
-	params["ephemeral"] = strconv.FormatBool(ephemeral)
-	return proxy.nacosServer.ReqApi(constant.SERVICE_PATH, params, http.MethodDelete)
-}
-
-func (proxy *NamingProxy) SendBeat(info model.BeatInfo) (int64, error) {
-	log.Printf("[INFO] namespaceId:<%s> sending beat to server:<%s> \n", proxy.clientConfig.NamespaceId, utils.ToJsonString(info))
-	params := map[string]string{}
-	params["namespaceId"] = proxy.clientConfig.NamespaceId
-	params["serviceName"] = info.ServiceName
-	params["beat"] = utils.ToJsonString(info)
-	api := constant.SERVICE_BASE_PATH + "/instance/beat"
-	result, err := proxy.nacosServer.ReqApi(api, params, http.MethodPut)
-	if err != nil {
-		return 0, err
-	}
-	if result != "" {
-		interVal, err := jsonparser.GetInt([]byte(result), "clientBeatInterval")
-		if err != nil {
-			return 0, errors.New(fmt.Sprintf("[ERROR] namespaceId:<%s> sending beat to server:<%s> get 'clientBeatInterval' from <%s> error:<%s>", proxy.clientConfig.NamespaceId, utils.ToJsonString(info), result, err.Error()))
-		} else {
-			return interVal, nil
-		}
-	}
-	return 0, nil
-
-}
-
-func (proxy *NamingProxy) GetServiceList(pageNo int, pageSize int, groupName string, selector *model.ExpressionSelector) (*model.ServiceList, error) {
-	params := map[string]string{}
-	params["namespaceId"] = proxy.clientConfig.NamespaceId
-	params["groupName"] = groupName
-	params["pageNo"] = strconv.Itoa(pageNo)
-	params["pageSize"] = strconv.Itoa(pageSize)
-
-	if selector != nil {
-		switch selector.Type {
-		case "label":
-			params["selector"] = utils.ToJsonString(selector)
-			break
-		default:
-			break
-
-		}
-	}
-
-	api := constant.SERVICE_BASE_PATH + "/service/list"
-	result, err := proxy.nacosServer.ReqApi(api, params, http.MethodGet)
-	if err != nil {
-		return nil, err
-	}
-	if result == "" {
-		return nil, errors.New("request server return empty")
-	}
-
-	serviceList := model.ServiceList{}
-	count, err := jsonparser.GetInt([]byte(result), "count")
-	if err != nil {
-		return nil, errors.New(fmt.Sprintf("[ERROR] namespaceId:<%s> get service list pageNo:<%d> pageSize:<%d> selector:<%s> from <%s> get 'count' from <%s> error:<%s>", proxy.clientConfig.NamespaceId, pageNo, pageSize, utils.ToJsonString(selector), groupName, result, err.Error()))
-	}
-	var doms []string
-	_, err = jsonparser.ArrayEach([]byte(result), func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
-		doms = append(doms, string(value))
-	}, "doms")
-	if err != nil {
-		return nil, errors.New(fmt.Sprintf("[ERROR] namespaceId:<%s> get service list pageNo:<%d> pageSize:<%d> selector:<%s> from <%s> get 'doms' from <%s> error:<%s> ", proxy.clientConfig.NamespaceId, pageNo, pageSize, utils.ToJsonString(selector), groupName, result, err.Error()))
-	}
-	serviceList.Count = count
-	serviceList.Doms = doms
-	return &serviceList, nil
-}
-
-func (proxy *NamingProxy) ServerHealthy() bool {
-	api := constant.SERVICE_BASE_PATH + "/operator/metrics"
-	result, err := proxy.nacosServer.ReqApi(api, map[string]string{}, http.MethodGet)
-	if err != nil {
-		log.Printf("[ERROR]:namespaceId:[%s] sending server healthy failed!,result:%s error:%s", proxy.clientConfig.NamespaceId, result, err.Error())
-		return false
-	}
-	if result != "" {
-		status, err := jsonparser.GetString([]byte(result), "status")
-		if err != nil {
-			log.Printf("[ERROR]:namespaceId:[%s] sending server healthy failed!,result:%s error:%s", proxy.clientConfig.NamespaceId, result, err.Error())
-		} else {
-			return status == "UP"
-		}
-	}
-	return false
-}
-
-func (proxy *NamingProxy) QueryList(serviceName string, clusters string, udpPort int, healthyOnly bool) (string, error) {
-	param := make(map[string]string)
-	param["namespaceId"] = proxy.clientConfig.NamespaceId
-	param["serviceName"] = serviceName
-	param["clusters"] = clusters
-	param["udpPort"] = strconv.Itoa(udpPort)
-	param["healthyOnly"] = strconv.FormatBool(healthyOnly)
-	param["clientIp"] = utils.LocalIP()
-	api := constant.SERVICE_PATH + "/list"
-	return proxy.nacosServer.ReqApi(api, param, http.MethodGet)
-}
--- a/clients/naming_client/naming_proxy/proxy_interface.go
+++ b/clients/naming_client/naming_proxy/proxy_interface.go
@ -0,0 +1,42 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_proxy
+
+import (
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+)
+
+// INamingProxy ...
+type INamingProxy interface {
+	RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error)
+
+	BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error)
+
+	DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error)
+
+	GetServiceList(pageNo uint32, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error)
+
+	ServerHealthy() bool
+
+	QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error)
+
+	Subscribe(serviceName, groupName, clusters string) (model.Service, error)
+
+	Unsubscribe(serviceName, groupName, clusters string) error
+
+	CloseClient()
+}
--- a/clients/naming_client/naming_proxy/proxy_interface_mock.go
+++ b/clients/naming_client/naming_proxy/proxy_interface_mock.go
@ -0,0 +1,165 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: clients/naming_client/naming_proxy/proxy_interface.go
+
+// Package naming_proxy is a generated GoMock package.
+package naming_proxy
+
+import (
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+	model "github.com/nacos-group/nacos-sdk-go/v2/model"
+)
+
+// MockINamingProxy is a mock of INamingProxy interface.
+type MockINamingProxy struct {
+	ctrl     *gomock.Controller
+	recorder *MockINamingProxyMockRecorder
+}
+
+// MockINamingProxyMockRecorder is the mock recorder for MockINamingProxy.
+type MockINamingProxyMockRecorder struct {
+	mock *MockINamingProxy
+}
+
+// NewMockINamingProxy creates a new mock instance.
+func NewMockINamingProxy(ctrl *gomock.Controller) *MockINamingProxy {
+	mock := &MockINamingProxy{ctrl: ctrl}
+	mock.recorder = &MockINamingProxyMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockINamingProxy) EXPECT() *MockINamingProxyMockRecorder {
+	return m.recorder
+}
+
+// BatchRegisterInstance mocks base method.
+func (m *MockINamingProxy) BatchRegisterInstance(serviceName, groupName string, instances []model.Instance) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "BatchRegisterInstance", serviceName, groupName, instances)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// BatchRegisterInstance indicates an expected call of BatchRegisterInstance.
+func (mr *MockINamingProxyMockRecorder) BatchRegisterInstance(serviceName, groupName, instances interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "BatchRegisterInstance", reflect.TypeOf((*MockINamingProxy)(nil).BatchRegisterInstance), serviceName, groupName, instances)
+}
+
+// CloseClient mocks base method.
+func (m *MockINamingProxy) CloseClient() {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "CloseClient")
+}
+
+// CloseClient indicates an expected call of CloseClient.
+func (mr *MockINamingProxyMockRecorder) CloseClient() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CloseClient", reflect.TypeOf((*MockINamingProxy)(nil).CloseClient))
+}
+
+// DeregisterInstance mocks base method.
+func (m *MockINamingProxy) DeregisterInstance(serviceName, groupName string, instance model.Instance) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "DeregisterInstance", serviceName, groupName, instance)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// DeregisterInstance indicates an expected call of DeregisterInstance.
+func (mr *MockINamingProxyMockRecorder) DeregisterInstance(serviceName, groupName, instance interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "DeregisterInstance", reflect.TypeOf((*MockINamingProxy)(nil).DeregisterInstance), serviceName, groupName, instance)
+}
+
+// GetServiceList mocks base method.
+func (m *MockINamingProxy) GetServiceList(pageNo, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetServiceList", pageNo, pageSize, groupName, namespaceId, selector)
+	ret0, _ := ret[0].(model.ServiceList)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetServiceList indicates an expected call of GetServiceList.
+func (mr *MockINamingProxyMockRecorder) GetServiceList(pageNo, pageSize, groupName, namespaceId, selector interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetServiceList", reflect.TypeOf((*MockINamingProxy)(nil).GetServiceList), pageNo, pageSize, groupName, namespaceId, selector)
+}
+
+// QueryInstancesOfService mocks base method.
+func (m *MockINamingProxy) QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "QueryInstancesOfService", serviceName, groupName, clusters, udpPort, healthyOnly)
+	ret0, _ := ret[0].(*model.Service)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// QueryInstancesOfService indicates an expected call of QueryInstancesOfService.
+func (mr *MockINamingProxyMockRecorder) QueryInstancesOfService(serviceName, groupName, clusters, udpPort, healthyOnly interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "QueryInstancesOfService", reflect.TypeOf((*MockINamingProxy)(nil).QueryInstancesOfService), serviceName, groupName, clusters, udpPort, healthyOnly)
+}
+
+// RegisterInstance mocks base method.
+func (m *MockINamingProxy) RegisterInstance(serviceName, groupName string, instance model.Instance) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "RegisterInstance", serviceName, groupName, instance)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// RegisterInstance indicates an expected call of RegisterInstance.
+func (mr *MockINamingProxyMockRecorder) RegisterInstance(serviceName, groupName, instance interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "RegisterInstance", reflect.TypeOf((*MockINamingProxy)(nil).RegisterInstance), serviceName, groupName, instance)
+}
+
+// ServerHealthy mocks base method.
+func (m *MockINamingProxy) ServerHealthy() bool {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ServerHealthy")
+	ret0, _ := ret[0].(bool)
+	return ret0
+}
+
+// ServerHealthy indicates an expected call of ServerHealthy.
+func (mr *MockINamingProxyMockRecorder) ServerHealthy() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ServerHealthy", reflect.TypeOf((*MockINamingProxy)(nil).ServerHealthy))
+}
+
+// Subscribe mocks base method.
+func (m *MockINamingProxy) Subscribe(serviceName, groupName, clusters string) (model.Service, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Subscribe", serviceName, groupName, clusters)
+	ret0, _ := ret[0].(model.Service)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Subscribe indicates an expected call of Subscribe.
+func (mr *MockINamingProxyMockRecorder) Subscribe(serviceName, groupName, clusters interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Subscribe", reflect.TypeOf((*MockINamingProxy)(nil).Subscribe), serviceName, groupName, clusters)
+}
+
+// Unsubscribe mocks base method.
+func (m *MockINamingProxy) Unsubscribe(serviceName, groupName, clusters string) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Unsubscribe", serviceName, groupName, clusters)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Unsubscribe indicates an expected call of Unsubscribe.
+func (mr *MockINamingProxyMockRecorder) Unsubscribe(serviceName, groupName, clusters interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Unsubscribe", reflect.TypeOf((*MockINamingProxy)(nil).Unsubscribe), serviceName, groupName, clusters)
+}
--- a/clients/naming_client/naming_proxy_delegate.go
+++ b/clients/naming_client/naming_proxy_delegate.go
@ -0,0 +1,139 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_client
+
+import (
+	"context"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+	"github.com/nacos-group/nacos-sdk-go/v2/inner/uuid"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_grpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_http"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_proxy"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+// NamingProxyDelegate ...
+type NamingProxyDelegate struct {
+	httpClientProxy   *naming_http.NamingHttpProxy
+	grpcClientProxy   *naming_grpc.NamingGrpcProxy
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+}
+
+func NewNamingProxyDelegate(ctx context.Context, clientCfg constant.ClientConfig, serverCfgs []constant.ServerConfig,
+	httpAgent http_agent.IHttpAgent, serviceInfoHolder *naming_cache.ServiceInfoHolder) (naming_proxy.INamingProxy, error) {
+	return NewNamingProxyDelegateWithRamCredentialProvider(ctx, clientCfg, serverCfgs, httpAgent, serviceInfoHolder, nil)
+}
+
+func NewNamingProxyDelegateWithRamCredentialProvider(ctx context.Context, clientCfg constant.ClientConfig, serverCfgs []constant.ServerConfig,
+	httpAgent http_agent.IHttpAgent, serviceInfoHolder *naming_cache.ServiceInfoHolder, provider security.RamCredentialProvider) (naming_proxy.INamingProxy, error) {
+
+	uid, err := uuid.NewV4()
+	if err != nil {
+		return nil, err
+	}
+	namingHeader := map[string][]string{
+		"Client-Version": {constant.CLIENT_VERSION},
+		"User-Agent":     {constant.CLIENT_VERSION},
+		"RequestId":      {uid.String()},
+		"Request-Module": {"Naming"},
+	}
+	nacosServer, err := nacos_server.NewNacosServerWithRamCredentialProvider(ctx, serverCfgs, clientCfg, httpAgent, clientCfg.TimeoutMs, clientCfg.Endpoint, namingHeader, provider)
+	if err != nil {
+		return nil, err
+	}
+
+	httpClientProxy, err := naming_http.NewNamingHttpProxy(ctx, clientCfg, nacosServer, serviceInfoHolder)
+	if err != nil {
+		return nil, err
+	}
+
+	grpcClientProxy, err := naming_grpc.NewNamingGrpcProxy(ctx, clientCfg, nacosServer, serviceInfoHolder)
+	if err != nil {
+		return nil, err
+	}
+
+	return &NamingProxyDelegate{
+		httpClientProxy:   httpClientProxy,
+		grpcClientProxy:   grpcClientProxy,
+		serviceInfoHolder: serviceInfoHolder,
+	}, nil
+}
+
+func (proxy *NamingProxyDelegate) getExecuteClientProxy(instance model.Instance) (namingProxy naming_proxy.INamingProxy) {
+	if instance.Ephemeral {
+		namingProxy = proxy.grpcClientProxy
+	} else {
+		namingProxy = proxy.httpClientProxy
+	}
+	return namingProxy
+}
+
+func (proxy *NamingProxyDelegate) RegisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return proxy.getExecuteClientProxy(instance).RegisterInstance(serviceName, groupName, instance)
+}
+
+func (proxy *NamingProxyDelegate) BatchRegisterInstance(serviceName string, groupName string, instances []model.Instance) (bool, error) {
+	return proxy.grpcClientProxy.BatchRegisterInstance(serviceName, groupName, instances)
+}
+
+func (proxy *NamingProxyDelegate) DeregisterInstance(serviceName string, groupName string, instance model.Instance) (bool, error) {
+	return proxy.getExecuteClientProxy(instance).DeregisterInstance(serviceName, groupName, instance)
+}
+
+func (proxy *NamingProxyDelegate) GetServiceList(pageNo uint32, pageSize uint32, groupName, namespaceId string, selector *model.ExpressionSelector) (model.ServiceList, error) {
+	return proxy.grpcClientProxy.GetServiceList(pageNo, pageSize, groupName, namespaceId, selector)
+}
+
+func (proxy *NamingProxyDelegate) ServerHealthy() bool {
+	return proxy.grpcClientProxy.ServerHealthy() || proxy.httpClientProxy.ServerHealthy()
+}
+
+func (proxy *NamingProxyDelegate) QueryInstancesOfService(serviceName, groupName, clusters string, udpPort int, healthyOnly bool) (*model.Service, error) {
+	return proxy.grpcClientProxy.QueryInstancesOfService(serviceName, groupName, clusters, udpPort, healthyOnly)
+}
+
+func (proxy *NamingProxyDelegate) Subscribe(serviceName, groupName string, clusters string) (model.Service, error) {
+	var err error
+	isSubscribed := proxy.grpcClientProxy.IsSubscribed(serviceName, groupName, clusters)
+	serviceNameWithGroup := util.GetServiceCacheKey(util.GetGroupName(serviceName, groupName), clusters)
+	serviceInfo, ok := proxy.serviceInfoHolder.ServiceInfoMap.Load(serviceNameWithGroup)
+	if !isSubscribed || !ok {
+		serviceInfo, err = proxy.grpcClientProxy.Subscribe(serviceName, groupName, clusters)
+		if err != nil {
+			return model.Service{}, err
+		}
+	}
+
+	service := serviceInfo.(model.Service)
+	proxy.serviceInfoHolder.ProcessService(&service)
+	return service, nil
+}
+
+func (proxy *NamingProxyDelegate) Unsubscribe(serviceName, groupName, clusters string) error {
+	proxy.serviceInfoHolder.StopUpdateIfContain(util.GetGroupName(serviceName, groupName), clusters)
+	return proxy.grpcClientProxy.Unsubscribe(serviceName, groupName, clusters)
+}
+
+func (proxy *NamingProxyDelegate) CloseClient() {
+	proxy.grpcClientProxy.CloseClient()
+}
--- a/clients/naming_client/push_receiver.go
+++ b/clients/naming_client/push_receiver.go
@ -1,115 +0,0 @@
-package naming_client
-
-import (
-	"encoding/json"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"log"
-	"math/rand"
-	"net"
-	"os"
-	"strconv"
-	"time"
-)
-
-type PushReceiver struct {
-	port        int
-	host        string
-	hostReactor *HostReactor
-}
-
-type PushData struct {
-	PushType    string `json:"type"`
-	Data        string `json:"data"`
-	LastRefTime int64  `json:"lastRefTime"`
-}
-
-func NewPushRecevier(hostReactor *HostReactor) *PushReceiver {
-	pr := PushReceiver{
-		hostReactor: hostReactor,
-	}
-	go pr.startServer()
-	return &pr
-}
-
-func (us *PushReceiver) tryListen() (*net.UDPConn, bool) {
-	addr, err := net.ResolveUDPAddr("udp", us.host+":"+strconv.Itoa(us.port))
-	if err != nil {
-		log.Printf("[ERROR]: Can't resolve address,err: %s \n", err.Error())
-		return nil, false
-	}
-
-	conn, err := net.ListenUDP("udp", addr)
-	if err != nil {
-		log.Printf("Error listening %s:%d,err:%s \n", us.host, us.port, err.Error())
-		return nil, false
-	}
-
-	return conn, true
-}
-
-func (us *PushReceiver) startServer() {
-	var conn *net.UDPConn
-
-	for i := 0; i < 3; i++ {
-		r := rand.New(rand.NewSource(time.Now().UnixNano()))
-		port := r.Intn(1000) + 54951
-		us.port = port
-		conn1, ok := us.tryListen()
-
-		if ok {
-			conn = conn1
-			log.Println("[INFO] udp server start, port: " + strconv.Itoa(port))
-			break
-		}
-
-		if !ok && i == 2 {
-			log.Panicf("failed to start udp server after trying 3 times.")
-			os.Exit(1)
-		}
-	}
-
-	defer conn.Close()
-	for {
-		us.handleClient(conn)
-	}
-}
-
-func (us *PushReceiver) handleClient(conn *net.UDPConn) {
-	data := make([]byte, 4024)
-	n, remoteAddr, err := conn.ReadFromUDP(data)
-	if err != nil {
-		log.Printf("[ERROR]:failed to read UDP msg because of %s \n", err.Error())
-		return
-	}
-
-	s := utils.TryDecompressData(data[:n])
-	log.Println("[INFO] receive push: "+s+" from: ", remoteAddr)
-
-	var pushData PushData
-	err1 := json.Unmarshal([]byte(s), &pushData)
-	if err1 != nil {
-		log.Printf("[ERROR] failed to process push data.err:%s \n", err1.Error())
-		return
-	}
-	ack := make(map[string]string)
-
-	if pushData.PushType == "dom" || pushData.PushType == "service" {
-		us.hostReactor.ProcessServiceJson(pushData.Data)
-
-		ack["type"] = "push-ack"
-		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
-		ack["data"] = ""
-
-	} else if pushData.PushType == "dump" {
-		ack["type"] = "dump-ack"
-		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
-		ack["data"] = utils.ToJsonString(us.hostReactor.serviceInfoMap)
-	} else {
-		ack["type"] = "unknow-ack"
-		ack["lastRefTime"] = strconv.FormatInt(pushData.LastRefTime, 10)
-		ack["data"] = ""
-	}
-
-	bs, _ := json.Marshal(ack)
-	conn.WriteToUDP(bs, remoteAddr)
-}
--- a/clients/naming_client/service_info_updater.go
+++ b/clients/naming_client/service_info_updater.go
@ -0,0 +1,84 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package naming_client
+
+import (
+	"context"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_cache"
+	"github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client/naming_proxy"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/model"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+)
+
+type ServiceInfoUpdater struct {
+	ctx               context.Context
+	serviceInfoHolder *naming_cache.ServiceInfoHolder
+	updateThreadNum   int
+	namingProxy       naming_proxy.INamingProxy
+}
+
+func NewServiceInfoUpdater(ctx context.Context, serviceInfoHolder *naming_cache.ServiceInfoHolder, updateThreadNum int,
+	namingProxy naming_proxy.INamingProxy) *ServiceInfoUpdater {
+
+	return &ServiceInfoUpdater{
+		ctx:               ctx,
+		serviceInfoHolder: serviceInfoHolder,
+		updateThreadNum:   updateThreadNum,
+		namingProxy:       namingProxy,
+	}
+}
+
+func (s *ServiceInfoUpdater) asyncUpdateService() {
+	sema := util.NewSemaphore(s.updateThreadNum)
+	for {
+		select {
+		case <-s.ctx.Done():
+			return
+		default:
+			s.serviceInfoHolder.ServiceInfoMap.Range(func(key, value interface{}) bool {
+				service := value.(model.Service)
+				lastRefTime, ok := s.serviceInfoHolder.UpdateTimeMap.Load(util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName),
+					service.Clusters))
+				if !ok {
+					lastRefTime = uint64(0)
+				}
+				if uint64(util.CurrentMillis())-lastRefTime.(uint64) > service.CacheMillis {
+					sema.Acquire()
+					go func() {
+						defer sema.Release()
+						s.updateServiceNow(service.Name, service.GroupName, service.Clusters)
+					}()
+				}
+				return true
+			})
+			time.Sleep(1 * time.Second)
+		}
+	}
+}
+
+func (s *ServiceInfoUpdater) updateServiceNow(serviceName, groupName, clusters string) {
+	result, err := s.namingProxy.QueryInstancesOfService(serviceName, groupName, clusters, 0, false)
+
+	if err != nil {
+		logger.Errorf("QueryInstances error, serviceName:%s, cluster:%s, err:%v", serviceName, clusters, err)
+		return
+	}
+	s.serviceInfoHolder.ProcessService(result)
+}
--- a/clients/naming_client/subscribe_callback.go
+++ b/clients/naming_client/subscribe_callback.go
@ -1,78 +0,0 @@
-package naming_client
-
-import (
-	"errors"
-	"github.com/nacos-group/nacos-sdk-go/clients/cache"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"log"
-)
-
-type SubscribeCallback struct {
-	callbackFuncsMap cache.ConcurrentMap
-}
-
-func NewSubscribeCallback() SubscribeCallback {
-	ed := SubscribeCallback{}
-	ed.callbackFuncsMap = cache.NewConcurrentMap()
-	return ed
-}
-
-func (ed *SubscribeCallback) AddCallbackFuncs(serviceName string, clusters string, callbackFunc *func(services []model.SubscribeService, err error)) {
-	log.Printf("[INFO] adding " + serviceName + " with " + clusters + " to listener map")
-	key := utils.GetServiceCacheKey(serviceName, clusters)
-	var funcs []*func(services []model.SubscribeService, err error)
-	old, ok := ed.callbackFuncsMap.Get(key)
-	if ok {
-		funcs = append(funcs, old.([]*func(services []model.SubscribeService, err error))...)
-	}
-	funcs = append(funcs, callbackFunc)
-	ed.callbackFuncsMap.Set(key, funcs)
-}
-
-func (ed *SubscribeCallback) RemoveCallbackFuncs(serviceName string, clusters string, callbackFunc *func(services []model.SubscribeService, err error)) {
-	log.Printf("[INFO] removing " + serviceName + " with " + clusters + " to listener map")
-	key := utils.GetServiceCacheKey(serviceName, clusters)
-	funcs, ok := ed.callbackFuncsMap.Get(key)
-	if ok && funcs != nil {
-		var newFuncs []*func(services []model.SubscribeService, err error)
-		for _, funcItem := range funcs.([]*func(services []model.SubscribeService, err error)) {
-			if funcItem != callbackFunc {
-				newFuncs = append(newFuncs, funcItem)
-			}
-		}
-		ed.callbackFuncsMap.Set(key, newFuncs)
-	}
-
-}
-
-func (ed *SubscribeCallback) ServiceChanged(service *model.Service) {
-	if service == nil || service.Name == "" {
-		return
-	}
-	key := utils.GetServiceCacheKey(service.Name, service.Clusters)
-	funcs, ok := ed.callbackFuncsMap.Get(key)
-	if ok {
-		for _, funcItem := range funcs.([]*func(services []model.SubscribeService, err error)) {
-			var subscribeServices []model.SubscribeService
-			if len(service.Hosts) == 0 {
-				(*funcItem)(subscribeServices, errors.New("[client.Subscribe] subscribe failed,hosts is empty"))
-				return
-			}
-			for _, host := range service.Hosts {
-				var subscribeService model.SubscribeService
-				subscribeService.Valid = host.Valid
-				subscribeService.Port = host.Port
-				subscribeService.Ip = host.Ip
-				subscribeService.Metadata = service.Metadata
-				subscribeService.ServiceName = host.ServiceName
-				subscribeService.ClusterName = host.ClusterName
-				subscribeService.Weight = host.Weight
-				subscribeService.InstanceId = host.InstanceId
-				subscribeService.Enable = host.Enable
-				subscribeServices = append(subscribeServices, subscribeService)
-			}
-			(*funcItem)(subscribeServices, nil)
-		}
-	}
-}
--- a/clients/naming_client/subscribe_callback_test.go
+++ b/clients/naming_client/subscribe_callback_test.go
@ -1,163 +0,0 @@
-package naming_client
-
-import (
-	"fmt"
-	"github.com/nacos-group/nacos-sdk-go/model"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/nacos-group/nacos-sdk-go/vo"
-	"github.com/stretchr/testify/assert"
-	"log"
-	"strings"
-	"testing"
-	"time"
-)
-
-func TestEventDispatcher_AddCallbackFuncs(t *testing.T) {
-	service := model.Service{
-		Dom:         "public@@Test",
-		Clusters:    strings.Join([]string{"default"}, ","),
-		CacheMillis: 10000,
-		Checksum:    "abcd",
-		LastRefTime: uint64(time.Now().Unix()),
-	}
-	var hosts []model.Instance
-	host := model.Instance{
-		Valid:       true,
-		Enable:      true,
-		InstanceId:  "123",
-		Port:        8080,
-		Ip:          "127.0.0.1",
-		Weight:      10,
-		ServiceName: "public@@Test",
-		ClusterName: strings.Join([]string{"default"}, ","),
-	}
-	hosts = append(hosts, host)
-	service.Hosts = hosts
-
-	ed := NewSubscribeCallback()
-	param := vo.SubscribeParam{
-		ServiceName: "Test",
-		Clusters:    []string{"default"},
-		GroupName:   "public",
-		SubscribeCallback: func(services []model.SubscribeService, err error) {
-			fmt.Println(utils.ToJsonString(ed.callbackFuncsMap))
-		},
-	}
-	ed.AddCallbackFuncs(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), &param.SubscribeCallback)
-	key := utils.GetServiceCacheKey(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
-	for k, v := range ed.callbackFuncsMap.Items() {
-		assert.Equal(t, key, k, "key should be equal!")
-		funcs := v.([]*func(services []model.SubscribeService, err error))
-		assert.Equal(t, len(funcs), 1)
-		assert.Equal(t, funcs[0], &param.SubscribeCallback, "callback function must be equal!")
-
-	}
-}
-
-func TestEventDispatcher_RemoveCallbackFuncs(t *testing.T) {
-	service := model.Service{
-		Dom:         "public@@Test",
-		Clusters:    strings.Join([]string{"default"}, ","),
-		CacheMillis: 10000,
-		Checksum:    "abcd",
-		LastRefTime: uint64(time.Now().Unix()),
-	}
-	var hosts []model.Instance
-	host := model.Instance{
-		Valid:       true,
-		Enable:      true,
-		InstanceId:  "123",
-		Port:        8080,
-		Ip:          "127.0.0.1",
-		Weight:      10,
-		ServiceName: "public@@Test",
-		ClusterName: strings.Join([]string{"default"}, ","),
-	}
-	hosts = append(hosts, host)
-	service.Hosts = hosts
-
-	ed := NewSubscribeCallback()
-	param := vo.SubscribeParam{
-		ServiceName: "Test",
-		Clusters:    []string{"default"},
-		GroupName:   "public",
-		SubscribeCallback: func(services []model.SubscribeService, err error) {
-			fmt.Printf("func1:%s \n", utils.ToJsonString(services))
-		},
-	}
-	ed.AddCallbackFuncs(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), &param.SubscribeCallback)
-	assert.Equal(t, len(ed.callbackFuncsMap.Items()), 1, "callback funcs map length should be 1")
-
-	param2 := vo.SubscribeParam{
-		ServiceName: "Test",
-		Clusters:    []string{"default"},
-		GroupName:   "public",
-		SubscribeCallback: func(services []model.SubscribeService, err error) {
-			fmt.Printf("func2:%s \n", utils.ToJsonString(services))
-		},
-	}
-	ed.AddCallbackFuncs(utils.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), &param2.SubscribeCallback)
-	assert.Equal(t, len(ed.callbackFuncsMap.Items()), 1, "callback funcs map length should be 2")
-
-	for k, v := range ed.callbackFuncsMap.Items() {
-		log.Printf("key:%s,%d", k, len(v.([]*func(services []model.SubscribeService, err error))))
-	}
-
-	ed.RemoveCallbackFuncs(utils.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), &param2.SubscribeCallback)
-
-	key := utils.GetServiceCacheKey(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","))
-	for k, v := range ed.callbackFuncsMap.Items() {
-		assert.Equal(t, key, k, "key should be equal!")
-		funcs := v.([]*func(services []model.SubscribeService, err error))
-		assert.Equal(t, len(funcs), 1)
-		assert.Equal(t, funcs[0], &param.SubscribeCallback, "callback function must be equal!")
-
-	}
-}
-
-func TestSubscribeCallback_ServiceChanged(t *testing.T) {
-	service := model.Service{
-		Name:        "public@@Test",
-		Clusters:    strings.Join([]string{"default"}, ","),
-		CacheMillis: 10000,
-		Checksum:    "abcd",
-		LastRefTime: uint64(time.Now().Unix()),
-	}
-	var hosts []model.Instance
-	host := model.Instance{
-		Valid:       true,
-		Enable:      true,
-		InstanceId:  "123",
-		Port:        8080,
-		Ip:          "127.0.0.1",
-		Weight:      10,
-		ServiceName: "public@@Test",
-		ClusterName: strings.Join([]string{"default"}, ","),
-	}
-	hosts = append(hosts, host)
-	service.Hosts = hosts
-
-	ed := NewSubscribeCallback()
-	param := vo.SubscribeParam{
-		ServiceName: "Test",
-		Clusters:    []string{"default"},
-		GroupName:   "public",
-		SubscribeCallback: func(services []model.SubscribeService, err error) {
-			log.Printf("func1:%s \n", utils.ToJsonString(services))
-		},
-	}
-	ed.AddCallbackFuncs(utils.GetGroupName(param.ServiceName, param.GroupName), strings.Join(param.Clusters, ","), &param.SubscribeCallback)
-
-	param2 := vo.SubscribeParam{
-		ServiceName: "Test",
-		Clusters:    []string{"default"},
-		GroupName:   "public",
-		SubscribeCallback: func(services []model.SubscribeService, err error) {
-			log.Printf("func2:%s \n", utils.ToJsonString(services))
-
-		},
-	}
-	ed.AddCallbackFuncs(utils.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), &param2.SubscribeCallback)
-
-	ed.ServiceChanged(&service)
-}
--- a/common/constant/client_config_options.go
+++ b/common/constant/client_config_options.go
@ -0,0 +1,246 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+import (
+	"os"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/file"
+)
+
+func NewClientConfig(opts ...ClientOption) *ClientConfig {
+	clientConfig := &ClientConfig{
+		TimeoutMs:            10 * 1000,
+		BeatInterval:         5 * 1000,
+		OpenKMS:              false,
+		CacheDir:             file.GetCurrentPath() + string(os.PathSeparator) + "cache",
+		UpdateThreadNum:      20,
+		NotLoadCacheAtStart:  false,
+		UpdateCacheWhenEmpty: false,
+		LogDir:               file.GetCurrentPath() + string(os.PathSeparator) + "log",
+		LogLevel:             "info",
+	}
+
+	for _, opt := range opts {
+		opt(clientConfig)
+	}
+
+	return clientConfig
+}
+
+// ClientOption ...
+type ClientOption func(*ClientConfig)
+
+// WithTimeoutMs ...
+func WithTimeoutMs(timeoutMs uint64) ClientOption {
+	return func(config *ClientConfig) {
+		config.TimeoutMs = timeoutMs
+	}
+}
+
+// WithAppName ...
+func WithAppName(appName string) ClientOption {
+	return func(config *ClientConfig) {
+		config.AppName = appName
+	}
+}
+
+// WithBeatInterval ...
+func WithBeatInterval(beatInterval int64) ClientOption {
+	return func(config *ClientConfig) {
+		config.BeatInterval = beatInterval
+	}
+}
+
+// WithNamespaceId ...
+func WithNamespaceId(namespaceId string) ClientOption {
+	return func(config *ClientConfig) {
+		config.NamespaceId = namespaceId
+	}
+}
+
+// WithEndpoint ...
+func WithEndpoint(endpoint string) ClientOption {
+	return func(config *ClientConfig) {
+		config.Endpoint = endpoint
+	}
+}
+
+// WithEndpointContextPath ...
+func WithEndpointContextPath(endpointContextPath string) ClientOption {
+	return func(config *ClientConfig) {
+		config.EndpointContextPath = endpointContextPath
+	}
+}
+
+// WithEndpointQueryParams ...
+func WithEndpointQueryParams(endpointQueryPrams string) ClientOption {
+	return func(config *ClientConfig) {
+		config.EndpointQueryParams = endpointQueryPrams
+	}
+}
+
+// WithClusterName ...
+func WithClusterName(clusterName string) ClientOption {
+	return func(config *ClientConfig) {
+		config.ClusterName = clusterName
+	}
+}
+
+// WithRegionId ...
+func WithRegionId(regionId string) ClientOption {
+	return func(config *ClientConfig) {
+		config.RegionId = regionId
+	}
+}
+
+// WithAccessKey ...
+func WithAccessKey(accessKey string) ClientOption {
+	return func(config *ClientConfig) {
+		config.AccessKey = accessKey
+	}
+}
+
+// WithSecretKey ...
+func WithSecretKey(secretKey string) ClientOption {
+	return func(config *ClientConfig) {
+		config.SecretKey = secretKey
+	}
+}
+
+func WithRamConfig(ramConfig *RamConfig) ClientOption {
+	return func(config *ClientConfig) {
+		config.RamConfig = ramConfig
+	}
+}
+
+// WithOpenKMS ...
+func WithOpenKMS(openKMS bool) ClientOption {
+	return func(config *ClientConfig) {
+		config.OpenKMS = openKMS
+	}
+}
+
+// WithOpenKMS ...
+func WithKMSVersion(kmsVersion KMSVersion) ClientOption {
+	return func(config *ClientConfig) {
+		config.KMSVersion = kmsVersion
+	}
+}
+
+func WithKMSv3Config(kmsv3Config *KMSv3Config) ClientOption {
+	return func(config *ClientConfig) {
+		config.KMSv3Config = kmsv3Config
+	}
+}
+
+func WithKMSConfig(kmsConfig *KMSConfig) ClientOption {
+	return func(config *ClientConfig) {
+		config.KMSConfig = kmsConfig
+	}
+}
+
+// WithCacheDir ...
+func WithCacheDir(cacheDir string) ClientOption {
+	return func(config *ClientConfig) {
+		config.CacheDir = cacheDir
+	}
+}
+
+// WithDisableUseSnapShot ...
+func WithDisableUseSnapShot(disableUseSnapShot bool) ClientOption {
+	return func(config *ClientConfig) {
+		config.DisableUseSnapShot = disableUseSnapShot
+	}
+}
+
+// WithUpdateThreadNum ...
+func WithUpdateThreadNum(updateThreadNum int) ClientOption {
+	return func(config *ClientConfig) {
+		config.UpdateThreadNum = updateThreadNum
+	}
+}
+
+// WithNotLoadCacheAtStart ...
+func WithNotLoadCacheAtStart(notLoadCacheAtStart bool) ClientOption {
+	return func(config *ClientConfig) {
+		config.NotLoadCacheAtStart = notLoadCacheAtStart
+	}
+}
+
+// WithUpdateCacheWhenEmpty ...
+func WithUpdateCacheWhenEmpty(updateCacheWhenEmpty bool) ClientOption {
+	return func(config *ClientConfig) {
+		config.UpdateCacheWhenEmpty = updateCacheWhenEmpty
+	}
+}
+
+// WithUsername ...
+func WithUsername(username string) ClientOption {
+	return func(config *ClientConfig) {
+		config.Username = username
+	}
+}
+
+// WithPassword ...
+func WithPassword(password string) ClientOption {
+	return func(config *ClientConfig) {
+		config.Password = password
+	}
+}
+
+// WithLogDir ...
+func WithLogDir(logDir string) ClientOption {
+	return func(config *ClientConfig) {
+		config.LogDir = logDir
+	}
+}
+
+// WithLogLevel ...
+func WithLogLevel(logLevel string) ClientOption {
+	return func(config *ClientConfig) {
+		config.LogLevel = logLevel
+	}
+}
+
+// WithLogSampling ...
+func WithLogSampling(tick time.Duration, initial int, thereafter int) ClientOption {
+	return func(config *ClientConfig) {
+		config.LogSampling = &ClientLogSamplingConfig{initial, thereafter, tick}
+	}
+}
+
+// WithLogRollingConfig ...
+func WithLogRollingConfig(rollingConfig *ClientLogRollingConfig) ClientOption {
+	return func(config *ClientConfig) {
+		config.LogRollingConfig = rollingConfig
+	}
+}
+
+func WithTLS(tlsCfg TLSConfig) ClientOption {
+	return func(config *ClientConfig) {
+		tlsCfg.Appointed = true
+		config.TLSCfg = tlsCfg
+	}
+}
+
+func WithAppConnLabels(appConnLabels map[string]string) ClientOption {
+	return func(config *ClientConfig) {
+		config.AppConnLabels = appConnLabels
+	}
+}
--- a/common/constant/client_config_options_test.go
+++ b/common/constant/client_config_options_test.go
@ -0,0 +1,95 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+import (
+	"os"
+	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/file"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewClientConfig(t *testing.T) {
+	config := NewClientConfig()
+
+	assert.Equal(t, config.TimeoutMs, uint64(10000))
+	assert.Equal(t, config.Endpoint, "")
+	assert.Equal(t, config.LogLevel, "info")
+	assert.Equal(t, config.BeatInterval, int64(5000))
+	assert.Equal(t, config.UpdateThreadNum, 20)
+
+	assert.Equal(t, config.LogDir, file.GetCurrentPath()+string(os.PathSeparator)+"log")
+	assert.Equal(t, config.CacheDir, file.GetCurrentPath()+string(os.PathSeparator)+"cache")
+
+	assert.Equal(t, config.NotLoadCacheAtStart, false)
+	assert.Equal(t, config.UpdateCacheWhenEmpty, false)
+
+	assert.Equal(t, config.Username, "")
+	assert.Equal(t, config.Password, "")
+	assert.Equal(t, config.OpenKMS, false)
+	assert.Equal(t, config.NamespaceId, "")
+	assert.Equal(t, config.Username, "")
+	assert.Equal(t, config.RegionId, "")
+	assert.Equal(t, config.AccessKey, "")
+	assert.Equal(t, config.SecretKey, "")
+}
+
+func TestNewClientConfigWithOptions(t *testing.T) {
+	config := NewClientConfig(
+		WithTimeoutMs(uint64(20000)),
+		WithEndpoint("http://console.nacos.io:80"),
+		WithLogLevel("error"),
+		WithBeatInterval(int64(2000)),
+		WithUpdateThreadNum(30),
+
+		WithLogDir("/tmp/nacos/log"),
+		WithCacheDir("/tmp/nacos/cache"),
+
+		WithNotLoadCacheAtStart(true),
+		WithUpdateCacheWhenEmpty(true),
+
+		WithUsername("nacos"),
+		WithPassword("nacos"),
+		WithOpenKMS(true),
+		WithRegionId("shanghai"),
+		WithNamespaceId("namespace_1"),
+		WithAccessKey("accessKey_1"),
+		WithSecretKey("secretKey_1"),
+	)
+
+	assert.Equal(t, config.TimeoutMs, uint64(20000))
+	assert.Equal(t, config.Endpoint, "http://console.nacos.io:80")
+	assert.Equal(t, config.LogLevel, "error")
+	assert.Equal(t, config.BeatInterval, int64(2000))
+	assert.Equal(t, config.UpdateThreadNum, 30)
+
+	assert.Equal(t, config.LogDir, "/tmp/nacos/log")
+	assert.Equal(t, config.CacheDir, "/tmp/nacos/cache")
+
+	assert.Equal(t, config.NotLoadCacheAtStart, true)
+	assert.Equal(t, config.UpdateCacheWhenEmpty, true)
+
+	assert.Equal(t, config.Username, "nacos")
+	assert.Equal(t, config.Password, "nacos")
+	assert.Equal(t, config.OpenKMS, true)
+	assert.Equal(t, config.RegionId, "shanghai")
+	assert.Equal(t, config.NamespaceId, "namespace_1")
+	assert.Equal(t, config.AccessKey, "accessKey_1")
+	assert.Equal(t, config.SecretKey, "secretKey_1")
+}
--- a/common/constant/config.go
+++ b/common/constant/config.go
@ -1,29 +1,134 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package constant

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-07 15:13
-**/
+import "time"

 type ServerConfig struct {
-	ContextPath string
-	IpAddr      string
-	Port        uint64
+	Scheme      string // the nacos server scheme,default=http,this is not required in 2.0
+	ContextPath string // the nacos server contextpath,default=/nacos,this is not required in 2.0
+	IpAddr      string // the nacos server address
+	Port        uint64 // nacos server port
+	GrpcPort    uint64 // nacos server grpc port, default=server port + 1000, this is not required
 }

 type ClientConfig struct {
-	TimeoutMs            uint64
-	ListenInterval       uint64
-	BeatInterval         int64
-	NamespaceId          string
-	Endpoint             string
-	CacheDir             string
-	LogDir               string
-	UpdateThreadNum      int
-	NotLoadCacheAtStart  bool
-	UpdateCacheWhenEmpty bool
+	TimeoutMs            uint64 // timeout for requesting Nacos server, default value is 10000ms
+	ListenInterval       uint64 // Deprecated
+	BeatInterval         int64  // the time interval for sending beat to server,default value is 5000ms
+	NamespaceId          string // the namespaceId of Nacos.When namespace is public, fill in the blank string here.
+	AppName              string // the appName
+	AppKey               string // the client identity information
+	Endpoint             string // the endpoint for get Nacos server addresses
+	RegionId             string // the regionId for kms
+	AccessKey            string // the AccessKey for kms
+	SecretKey            string // the SecretKey for kms
+	RamConfig            *RamConfig
+	OpenKMS              bool         // it's to open kms, default is false. https://help.aliyun.com/product/28933.html
+	KMSVersion           KMSVersion   // kms client version. https://help.aliyun.com/document_detail/380927.html
+	KMSv3Config          *KMSv3Config //KMSv3 configuration. https://help.aliyun.com/document_detail/601596.html
+	KMSConfig            *KMSConfig
+	CacheDir             string                   // the directory for persist nacos service info,default value is current path
+	DisableUseSnapShot   bool                     // It's a switch, default is false, means that when get remote config fail, use local cache file instead
+	UpdateThreadNum      int                      // the number of goroutine for update nacos service info,default value is 20
+	NotLoadCacheAtStart  bool                     // not to load persistent nacos service info in CacheDir at start time
+	UpdateCacheWhenEmpty bool                     // update cache when get empty service instance from server
+	Username             string                   // the username for nacos auth
+	Password             string                   // the password for nacos auth
+	LogDir               string                   // the directory for log, default is current path
+	LogLevel             string                   // the level of log, it's must be debug,info,warn,error, default value is info
+	ContextPath          string                   // the nacos server contextpath
+	AppendToStdout       bool                     // if append log to stdout
+	LogSampling          *ClientLogSamplingConfig // the sampling config of log
+	LogRollingConfig     *ClientLogRollingConfig  // log rolling config
+	TLSCfg               TLSConfig                // tls Config
+	AsyncUpdateService   bool                     // open async update service by query
+	EndpointContextPath  string                   // the address server  endpoint contextPath
+	EndpointQueryParams  string                   // the address server  endpoint query params
+	ClusterName          string                   // the address server  clusterName
+	AppConnLabels        map[string]string        // app conn labels
+}
+
+type ClientLogSamplingConfig struct {
+	Initial    int           //the sampling initial of log
+	Thereafter int           //the sampling thereafter of log
+	Tick       time.Duration //the sampling tick of log
+}
+
+type ClientLogRollingConfig struct {
+	// MaxSize is the maximum size in megabytes of the log file before it gets
+	// rotated. It defaults to 100 megabytes.
+	MaxSize int
+
+	// MaxAge is the maximum number of days to retain old log files based on the
+	// timestamp encoded in their filename.  Note that a day is defined as 24
+	// hours and may not exactly correspond to calendar days due to daylight
+	// savings, leap seconds, etc. The default is not to remove old log files
+	// based on age.
+	MaxAge int
+
+	// MaxBackups is the maximum number of old log files to retain.  The default
+	// is to retain all old log files (though MaxAge may still cause them to get
+	// deleted.)
+	MaxBackups int
+
+	// LocalTime determines if the time used for formatting the timestamps in
+	// backup files is the computer's local time.  The default is to use UTC
+	// time.
+	LocalTime bool
+
+	// Compress determines if the rotated log files should be compressed
+	// using gzip. The default is not to perform compression.
+	Compress bool
+}
+
+type TLSConfig struct {
+	Appointed          bool   // Appointed or not ,if false,will get from env.
+	Enable             bool   // enable tls
+	TrustAll           bool   // trust all server
+	CaFile             string // clients use when verifying server certificates
+	CertFile           string // server use when verifying client certificates
+	KeyFile            string // server use when verifying client certificates
+	ServerNameOverride string // serverNameOverride is for testing only
+}
+
+type KMSv3Config struct {
+	ClientKeyContent string
+	Password         string
+	Endpoint         string
+	CaContent        string
+}
+
+type KMSConfig struct {
+	Endpoint  string
+	OpenSSL   string
+	CaContent string
+}
+
+type RamConfig struct {
+	SecurityToken         string
+	SignatureRegionId     string
+	RamRoleName           string
+	RoleArn               string
+	Policy                string
+	RoleSessionName       string
+	RoleSessionExpiration int
+	OIDCProviderArn       string
+	OIDCTokenFilePath     string
+	CredentialsURI        string
+	SecretName            string
 }
--- a/common/constant/const.go
+++ b/common/constant/const.go
@ -1,60 +1,121 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package constant

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-07 15:13
-**/
+import "time"
+
+type KMSVersion string

 const (
-	KEY_ENDPOINT                = "endpoint"
-	KEY_NAME_SPACE              = "namespace"
-	KEY_ACCESS_KEY              = "accessKey"
-	KEY_SECRET_KEY              = "secretKey"
-	KEY_SERVER_ADDR             = "serverAddr"
-	KEY_CONTEXT_PATH            = "contextPath"
-	KEY_ENCODE                  = "encode"
-	KEY_DATA_ID                 = "dataId"
-	KEY_GROUP                   = "group"
-	KEY_TENANT                  = "tenant"
-	KEY_DESC                    = "desc"
-	KEY_APP_NAME                = "appName"
-	KEY_CONTENT                 = "content"
-	KEY_TIMEOUT_MS              = "timeoutMs"
-	KEY_LISTEN_INTERVAL         = "listenInterval"
-	KEY_SERVER_CONFIGS          = "serverConfigs"
-	KEY_CLIENT_CONFIG           = "clientConfig"
-	WEB_CONTEXT                 = "/nacos"
-	CONFIG_BASE_PATH            = "/v1/cs"
-	CONFIG_PATH                 = CONFIG_BASE_PATH + "/configs"
-	CONFIG_LISTEN_PATH          = CONFIG_BASE_PATH + "/configs/listener"
-	SERVICE_BASE_PATH           = "/v1/ns"
-	SERVICE_PATH                = SERVICE_BASE_PATH + "/instance"
-	SERVICE_SUBSCRIBE_PATH      = SERVICE_PATH + "/list"
-	NAMESPACE_PATH              = "/v1/console/namespaces"
-	SPLIT_CONFIG                = string(rune(1))
-	SPLIT_CONFIG_INNER          = string(rune(2))
-	KEY_LISTEN_CONFIGS          = "Listening-Configs"
-	KEY_SERVICE_NAME            = "serviceName"
-	KEY_IP                      = "ip"
-	KEY_PORT                    = "port"
-	KEY_WEIGHT                  = "weight"
-	KEY_ENABLE                  = "enable"
-	KEY_HEALTHY                 = "healthy"
-	KEY_METADATA                = "metadata"
-	KEY_CLUSTER_NAME            = "clusterName"
-	KEY_CLUSTER                 = "cluster"
-	KEY_BEAT                    = "beat"
-	KEY_DOM                     = "dom"
-	DEFAULT_CONTEXT_PATH        = "/nacos"
-	CLIENT_VERSION              = "Nacos-go-Client:v1.0.0"
-	REQUEST_DOMAIN_RETRY_TIME   = 3
-	SERVICE_INFO_SPLITER        = "@@"
-	CONFIG_INFO_SPLITER         = "@@"
-	DEFAULT_NAMESPACE_ID        = "public"
-	DEFAULT_GROUP               = "DEFAULT_GROUP"
-	NAMING_INSTANCE_ID_SPLITTER = "#"
+	KMSv1               KMSVersion = "KMSv1"
+	KMSv3               KMSVersion = "KMSv3"
+	DEFAULT_KMS_VERSION KMSVersion = "" //to fit original version
+	UNKNOWN_KMS_VERSION KMSVersion = "UNKNOWN_KMS_VERSION"
+)
+const (
+	KEY_USERNAME                      = "username"
+	KEY_PASSWORD                      = "password"
+	KEY_ENDPOINT                      = "endpoint"
+	KEY_NAME_SPACE                    = "namespace"
+	KEY_ACCESS_KEY                    = "accessKey"
+	KEY_SECRET_KEY                    = "secretKey"
+	KEY_SERVER_ADDR                   = "serverAddr"
+	KEY_CONTEXT_PATH                  = "contextPath"
+	KEY_ENCODE                        = "encode"
+	KEY_DATA_ID                       = "dataId"
+	KEY_GROUP                         = "group"
+	KEY_TENANT                        = "tenant"
+	KEY_DESC                          = "desc"
+	KEY_APP_NAME                      = "appName"
+	KEY_CONTENT                       = "content"
+	KEY_TIMEOUT_MS                    = "timeoutMs"
+	KEY_LISTEN_INTERVAL               = "listenInterval"
+	KEY_SERVER_CONFIGS                = "serverConfigs"
+	KEY_CLIENT_CONFIG                 = "clientConfig"
+	KEY_TOKEN                         = "token"
+	KEY_ACCESS_TOKEN                  = "accessToken"
+	KEY_TOKEN_TTL                     = "tokenTtl"
+	KEY_GLOBAL_ADMIN                  = "globalAdmin"
+	KEY_TOKEN_REFRESH_WINDOW          = "tokenRefreshWindow"
+	WEB_CONTEXT                       = "/nacos"
+	CONFIG_BASE_PATH                  = "/v1/cs"
+	CONFIG_PATH                       = CONFIG_BASE_PATH + "/configs"
+	CONFIG_AGG_PATH                   = "/datum.do"
+	CONFIG_LISTEN_PATH                = CONFIG_BASE_PATH + "/configs/listener"
+	SERVICE_BASE_PATH                 = "/v1/ns"
+	SERVICE_PATH                      = SERVICE_BASE_PATH + "/instance"
+	SERVICE_INFO_PATH                 = SERVICE_BASE_PATH + "/service"
+	SERVICE_SUBSCRIBE_PATH            = SERVICE_PATH + "/list"
+	NAMESPACE_PATH                    = "/v1/console/namespaces"
+	SPLIT_CONFIG                      = string(rune(1))
+	SPLIT_CONFIG_INNER                = string(rune(2))
+	KEY_LISTEN_CONFIGS                = "Listening-Configs"
+	KEY_SERVICE_NAME                  = "serviceName"
+	KEY_IP                            = "ip"
+	KEY_PORT                          = "port"
+	KEY_WEIGHT                        = "weight"
+	KEY_ENABLE                        = "enable"
+	KEY_HEALTHY                       = "healthy"
+	KEY_METADATA                      = "metadata"
+	KEY_CLUSTER_NAME                  = "clusterName"
+	KEY_CLUSTER                       = "cluster"
+	KEY_BEAT                          = "beat"
+	KEY_DOM                           = "dom"
+	DEFAULT_CONTEXT_PATH              = "/nacos"
+	CLIENT_VERSION                    = "Nacos-Go-Client:v2.3.3"
+	REQUEST_DOMAIN_RETRY_TIME         = 3
+	SERVICE_INFO_SPLITER              = "@@"
+	CONFIG_INFO_SPLITER               = "@@"
+	DEFAULT_NAMESPACE_ID              = "public"
+	DEFAULT_GROUP                     = "DEFAULT_GROUP"
+	NAMING_INSTANCE_ID_SPLITTER       = "#"
+	DefaultClientErrorCode            = "SDK.NacosError"
+	DEFAULT_SERVER_SCHEME             = "http"
+	HTTPS_SERVER_SCHEME               = "https"
+	LABEL_SOURCE                      = "source"
+	LABEL_SOURCE_SDK                  = "sdk"
+	LABEL_MODULE                      = "module"
+	LABEL_MODULE_CONFIG               = "config"
+	LABEL_MODULE_NAMING               = "naming"
+	RESPONSE_CODE_SUCCESS             = 200
+	UN_REGISTER                       = 301
+	KEEP_ALIVE_TIME                   = 5
+	DEFAULT_TIMEOUT_MILLS             = 3000
+	ALL_SYNC_INTERNAL                 = 5 * time.Minute
+	CLIENT_APPNAME_HEADER             = "Client-AppName"
+	APPNAME_HEADER                    = "AppName"
+	CLIENT_REQUEST_TS_HEADER          = "Client-RequestTS"
+	CLIENT_REQUEST_TOKEN_HEADER       = "Client-RequestToken"
+	EX_CONFIG_INFO                    = "exConfigInfo"
+	CHARSET_KEY                       = "charset"
+	LOG_FILE_NAME                     = "nacos-sdk.log"
+	HTTPS_SERVER_PORT                 = 443
+	GRPC                              = "grpc"
+	RpcPortOffset                     = 1000
+	MSE_KMSv1_DEFAULT_KEY_ID          = "alias/acs/mse"
+	CONFIG_PUBLISH_REQUEST_NAME       = "ConfigPublishRequest"
+	CONFIG_QUERY_REQUEST_NAME         = "ConfigQueryRequest"
+	CONFIG_REMOVE_REQUEST_NAME        = "ConfigRemoveRequest"
+	INSTANCE_REQUEST_NAME             = "InstanceRequest"
+	BATCH_INSTANCE_REQUEST_NAME       = "BatchInstanceRequest"
+	SERVICE_LIST_REQUEST_NAME         = "ServiceListRequest"
+	SERVICE_QUERY_REQUEST_NAME        = "ServiceQueryRequest"
+	SUBSCRIBE_SERVICE_REQUEST_NAME    = "SubscribeServiceRequest"
+	NOTIFY_SUBSCRIBE_REQUEST_NAME     = "NotifySubscriberRequest"
+	CONFIG_BATCH_LISTEN_REQUEST_NAME  = "ConfigBatchListenRequest"
+	CONFIG_CHANGE_NOTIFY_REQUEST_NAME = "ConfigChangeNotifyRequest"
 )
--- a/common/constant/preserved_metadata_keys.go
+++ b/common/constant/preserved_metadata_keys.go
@ -0,0 +1,23 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+const (
+	HEART_BEAT_TIMEOUT  = "preserved.heart.beat.timeout"
+	IP_DELETE_TIMEOUT   = "preserved.ip.delete.timeout"
+	HEART_BEAT_INTERVAL = "preserved.heart.beat.interval"
+)
--- a/common/constant/server_config_options.go
+++ b/common/constant/server_config_options.go
@ -0,0 +1,70 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+func NewServerConfig(ipAddr string, port uint64, opts ...ServerOption) *ServerConfig {
+	serverConfig := &ServerConfig{
+		IpAddr:      ipAddr,
+		Port:        port,
+		ContextPath: DEFAULT_CONTEXT_PATH,
+		Scheme:      DEFAULT_SERVER_SCHEME,
+	}
+
+	for _, opt := range opts {
+		opt(serverConfig)
+	}
+
+	return serverConfig
+}
+
+// ServerOption ...
+type ServerOption func(*ServerConfig)
+
+// WithScheme set Scheme for server
+func WithScheme(scheme string) ServerOption {
+	return func(config *ServerConfig) {
+		config.Scheme = scheme
+	}
+}
+
+// WithContextPath set contextPath for server
+func WithContextPath(contextPath string) ServerOption {
+	return func(config *ServerConfig) {
+		config.ContextPath = contextPath
+	}
+}
+
+// WithIpAddr set ip address for server
+func WithIpAddr(ipAddr string) ServerOption {
+	return func(config *ServerConfig) {
+		config.IpAddr = ipAddr
+	}
+}
+
+// WithPort set port for server
+func WithPort(port uint64) ServerOption {
+	return func(config *ServerConfig) {
+		config.Port = port
+	}
+}
+
+// WithGrpcPort set grpc port for server
+func WithGrpcPort(port uint64) ServerOption {
+	return func(config *ServerConfig) {
+		config.GrpcPort = port
+	}
+}
--- a/common/constant/server_config_options_test.go
+++ b/common/constant/server_config_options_test.go
@ -0,0 +1,48 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewServerConfig(t *testing.T) {
+	config := NewServerConfig("console.nacos.io", 80)
+
+	assert.Equal(t, "console.nacos.io", config.IpAddr)
+	assert.Equal(t, uint64(80), config.Port)
+	assert.Equal(t, "/nacos", config.ContextPath)
+	assert.Equal(t, "http", config.Scheme)
+	assert.True(t, config.Port > 0 && config.Port < 65535)
+}
+
+func TestNewServerConfigWithOptions(t *testing.T) {
+	config := NewServerConfig(
+		"console.nacos.io",
+		80,
+		WithContextPath("/ns"),
+		WithScheme("https"),
+	)
+
+	assert.Equal(t, "console.nacos.io", config.IpAddr)
+	assert.Equal(t, uint64(80), config.Port)
+	assert.Equal(t, "/ns", config.ContextPath)
+	assert.Equal(t, "https", config.Scheme)
+	assert.True(t, config.Port > 0 && config.Port < 65535)
+}
--- a/common/constant/server_tls_options.go
+++ b/common/constant/server_tls_options.go
@ -0,0 +1,43 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constant
+
+var SkipVerifyConfig = TLSConfig{Enable: true}
+
+func NewTLSConfig(opts ...TLSOption) *TLSConfig {
+	tlsConfig := TLSConfig{Enable: true}
+	for _, opt := range opts {
+		opt(&tlsConfig)
+	}
+	return &tlsConfig
+}
+
+type TLSOption func(*TLSConfig)
+
+func WithCA(caFile, serverNameOverride string) TLSOption {
+	return func(tc *TLSConfig) {
+		tc.CaFile = caFile
+		tc.ServerNameOverride = serverNameOverride
+	}
+}
+
+func WithCertificate(certFile, keyFile string) TLSOption {
+	return func(tc *TLSConfig) {
+		tc.CertFile = certFile
+		tc.KeyFile = keyFile
+	}
+}
--- a/common/constant/server_tls_options_test.go
+++ b/common/constant/server_tls_options_test.go
@ -0,0 +1,54 @@
+package constant
+
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewTLSConfigWithOptions(t *testing.T) {
+	t.Run("TestNoOption", func(t *testing.T) {
+		cfg := SkipVerifyConfig
+		assert.Equal(t, "", cfg.CaFile)
+		assert.Equal(t, "", cfg.CertFile)
+		assert.Equal(t, "", cfg.KeyFile)
+		assert.Equal(t, "", cfg.ServerNameOverride)
+	})
+
+	t.Run("TestCAOption", func(t *testing.T) {
+		cfg := NewTLSConfig(
+			WithCA("ca", "host"),
+		)
+		assert.Equal(t, "ca", cfg.CaFile)
+		assert.Equal(t, "", cfg.CertFile)
+		assert.Equal(t, "", cfg.KeyFile)
+		assert.Equal(t, "host", cfg.ServerNameOverride)
+	})
+
+	t.Run("TestCertOption", func(t *testing.T) {
+		cfg := NewTLSConfig(
+			WithCA("ca", "host"),
+			WithCertificate("cert", "key"),
+		)
+		assert.Equal(t, "ca", cfg.CaFile)
+		assert.Equal(t, "cert", cfg.CertFile)
+		assert.Equal(t, "key", cfg.KeyFile)
+		assert.Equal(t, "host", cfg.ServerNameOverride)
+	})
+}
--- a/common/encoding/encryption.go
+++ b/common/encoding/encryption.go
@ -0,0 +1,72 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encoding
+
+import (
+	"encoding/base64"
+	"unicode/utf8"
+)
+
+func DecodeString2Utf8Bytes(data string) []byte {
+	resBytes := make([]byte, 0, 8)
+	if len(data) == 0 {
+		return resBytes
+	}
+	bytesLen := 0
+	runes := []rune(data)
+	for _, r := range runes {
+		bytesLen += utf8.RuneLen(r)
+	}
+	resBytes = make([]byte, bytesLen)
+	pos := 0
+	for _, r := range runes {
+		pos += utf8.EncodeRune(resBytes[pos:], r)
+	}
+	return resBytes
+}
+
+func EncodeUtf8Bytes2String(bytes []byte) string {
+	if len(bytes) == 0 {
+		return ""
+	}
+	var startPos, endPos int
+	resRunes := make([]rune, 0, 8)
+	for endPos <= len(bytes) {
+		if utf8.FullRune(bytes[startPos:endPos]) {
+			decodedRune, _ := utf8.DecodeRune(bytes[startPos:endPos])
+			resRunes = append(resRunes, decodedRune)
+			startPos = endPos
+		}
+		endPos++
+	}
+	return string(resRunes)
+}
+
+func DecodeBase64(bytes []byte) ([]byte, error) {
+	dst := make([]byte, base64.StdEncoding.DecodedLen(len(bytes)))
+	n, err := base64.StdEncoding.Decode(dst, bytes)
+	if err != nil {
+		return nil, err
+	}
+	return dst[:n], nil
+}
+
+func EncodeBase64(bytes []byte) ([]byte, error) {
+	dst := make([]byte, base64.StdEncoding.EncodedLen(len(bytes)))
+	base64.StdEncoding.Encode(dst, bytes)
+	return dst[:], nil
+}
--- a/common/encryption/aes_ecb_pkcs5padding.go
+++ b/common/encryption/aes_ecb_pkcs5padding.go
@ -0,0 +1,88 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encryption
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"fmt"
+)
+
+func AesEcbPkcs5PaddingEncrypt(plainContent, key []byte) (retBytes []byte, err error) {
+	if len(plainContent) == 0 {
+		return nil, nil
+	}
+	aesCipherBlock, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	pkcs5PaddingBytes := PKCS5Padding(plainContent, aesCipherBlock.BlockSize())
+	return BlockEncrypt(pkcs5PaddingBytes, aesCipherBlock)
+}
+
+func AesEcbPkcs5PaddingDecrypt(cipherContent, key []byte) (retBytes []byte, err error) {
+	if len(cipherContent) == 0 {
+		return nil, nil
+	}
+	aesCipherBlock, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	decryptBytes, err := BlockDecrypt(cipherContent, aesCipherBlock)
+	if err != nil {
+		return nil, err
+	}
+	retBytes = PKCS5UnPadding(decryptBytes)
+	return retBytes, nil
+}
+
+func PKCS5Padding(ciphertext []byte, blockSize int) []byte {
+	padding := blockSize - len(ciphertext)%blockSize
+	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(ciphertext, padtext...)
+}
+
+func PKCS5UnPadding(origData []byte) []byte {
+	length := len(origData)
+	unpadding := int(origData[length-1])
+	return origData[:(length - unpadding)]
+}
+
+func BlockEncrypt(src []byte, b cipher.Block) (dst []byte, err error) {
+	if len(src)%b.BlockSize() != 0 {
+		return nil, fmt.Errorf("input not full blocks")
+	}
+	buf := make([]byte, b.BlockSize())
+	for i := 0; i < len(src); i += b.BlockSize() {
+		b.Encrypt(buf, src[i:i+b.BlockSize()])
+		dst = append(dst, buf...)
+	}
+	return
+}
+
+func BlockDecrypt(src []byte, b cipher.Block) (dst []byte, err error) {
+	if len(src)%b.BlockSize() != 0 {
+		return nil, fmt.Errorf("input not full blocks")
+	}
+	buf := make([]byte, b.BlockSize())
+	for i := 0; i < len(src); i += b.BlockSize() {
+		b.Decrypt(buf, src[i:i+b.BlockSize()])
+		dst = append(dst, buf...)
+	}
+	return
+}
--- a/common/encryption/const.go
+++ b/common/encryption/const.go
@ -0,0 +1,68 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encryption
+
+import "fmt"
+
+const (
+	CipherPrefix = "cipher-"
+
+	KmsAes128AlgorithmName = "cipher-kms-aes-128"
+	KmsAes256AlgorithmName = "cipher-kms-aes-256"
+	KmsAlgorithmName       = "cipher"
+
+	kmsAes128KeySpec = "AES_128"
+	kmsAes256KeySpec = "AES_256"
+
+	kmsScheme       = "https"
+	kmsAcceptFormat = "XML"
+
+	kmsCipherAlgorithm = "AES/ECB/PKCS5Padding"
+
+	maskUnit8Width  = 8
+	maskUnit32Width = 32
+
+	KmsHandlerName = "KmsHandler"
+)
+
+var (
+	DataIdParamCheckError  = fmt.Errorf("dataId prefix should start with: %s", CipherPrefix)
+	ContentParamCheckError = fmt.Errorf("content need to encrypt is nil")
+	KeyIdParamCheckError   = fmt.Errorf("keyId is nil, need to be set")
+)
+
+var (
+	PluginNotFoundError = fmt.Errorf("cannot find encryption plugin by dataId prefix")
+)
+
+var (
+	EmptyEncryptedDataKeyError = fmt.Errorf("empty encrypted data key error")
+	EmptyPlainDataKeyError     = fmt.Errorf("empty plain data key error")
+	EmptyContentError          = fmt.Errorf("encrypt empty content error")
+)
+
+var (
+	EmptyRegionKmsV1ClientInitError = fmt.Errorf("init kmsV1 client failed with empty region")
+	EmptyAkKmsV1ClientInitError     = fmt.Errorf("init kmsV1 client failed with empty ak")
+	EmptySkKmsV1ClientInitError     = fmt.Errorf("init kmsV1 client failed with empty sk")
+
+	EmptyEndpointKmsV3ClientInitError         = fmt.Errorf("init kmsV3 client failed with empty endpoint")
+	EmptyPasswordKmsV3ClientInitError         = fmt.Errorf("init kmsV3 client failed with empty password")
+	EmptyClientKeyContentKmsV3ClientInitError = fmt.Errorf("init kmsV3 client failed with empty client key content")
+	EmptyCaVerifyKmsV3ClientInitError         = fmt.Errorf("init kmsV3 client failed with empty ca verify")
+	EmptyEndpointKmsRamClientInitError        = fmt.Errorf("init kmsRam client failed with empty endpoint")
+)
--- a/common/encryption/handler.go
+++ b/common/encryption/handler.go
@ -0,0 +1,224 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encryption
+
+import (
+	"fmt"
+	"github.com/alibabacloud-go/tea/tea"
+	dkms_api "github.com/aliyun/alibabacloud-dkms-gcs-go-sdk/openapi"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/pkg/errors"
+	"strings"
+)
+
+type HandlerParam struct {
+	DataId           string `json:"dataId"`  //required
+	Content          string `json:"content"` //required
+	EncryptedDataKey string `json:"encryptedDataKey"`
+	PlainDataKey     string `json:"plainDataKey"`
+	KeyId            string `json:"keyId"`
+}
+
+type Plugin interface {
+	Encrypt(*HandlerParam) error
+	Decrypt(*HandlerParam) error
+	AlgorithmName() string
+	GenerateSecretKey(*HandlerParam) (string, error)
+	EncryptSecretKey(*HandlerParam) (string, error)
+	DecryptSecretKey(*HandlerParam) (string, error)
+}
+
+type Handler interface {
+	EncryptionHandler(*HandlerParam) error
+	DecryptionHandler(*HandlerParam) error
+	RegisterPlugin(Plugin) error
+	GetHandlerName() string
+}
+
+func NewKmsHandler() Handler {
+	return newKmsHandler()
+}
+
+func newKmsHandler() *KmsHandler {
+	kmsHandler := &KmsHandler{
+		encryptionPlugins: make(map[string]Plugin, 2),
+	}
+	logger.Debug("successfully create encryption KmsHandler")
+	return kmsHandler
+}
+
+func RegisterConfigEncryptionKmsPlugins(encryptionHandler Handler, clientConfig constant.ClientConfig) {
+	innerKmsClient, err := innerNewKmsClient(clientConfig)
+	if innerKmsClient == nil {
+		err = errors.New("create kms client failed.")
+	}
+	if err != nil && innerKmsClient == nil {
+		err = errors.New("create kms client failed.")
+	}
+	if err != nil {
+		logger.Error(err)
+	}
+	if err := encryptionHandler.RegisterPlugin(&KmsAes128Plugin{kmsPlugin{kmsClient: innerKmsClient}}); err != nil {
+		logger.Errorf("failed to register encryption plugin[%s] to %s", KmsAes128AlgorithmName, encryptionHandler.GetHandlerName())
+	} else {
+		logger.Debugf("successfully register encryption plugin[%s] to %s", KmsAes128AlgorithmName, encryptionHandler.GetHandlerName())
+	}
+	if err := encryptionHandler.RegisterPlugin(&KmsAes256Plugin{kmsPlugin{kmsClient: innerKmsClient}}); err != nil {
+		logger.Errorf("failed to register encryption plugin[%s] to %s", KmsAes256AlgorithmName, encryptionHandler.GetHandlerName())
+	} else {
+		logger.Debugf("successfully register encryption plugin[%s] to %s", KmsAes256AlgorithmName, encryptionHandler.GetHandlerName())
+	}
+	if err := encryptionHandler.RegisterPlugin(&KmsBasePlugin{kmsPlugin{kmsClient: innerKmsClient}}); err != nil {
+		logger.Errorf("failed to register encryption plugin[%s] to %s", KmsAlgorithmName, encryptionHandler.GetHandlerName())
+	} else {
+		logger.Debugf("successfully register encryption plugin[%s] to %s", KmsAlgorithmName, encryptionHandler.GetHandlerName())
+	}
+}
+
+type KmsHandler struct {
+	encryptionPlugins map[string]Plugin
+}
+
+func (d *KmsHandler) EncryptionHandler(param *HandlerParam) error {
+	if err := d.encryptionParamCheck(*param); err != nil {
+		return err
+	}
+	plugin, err := d.getPluginByDataIdPrefix(param.DataId)
+	if err != nil {
+		return err
+	}
+	plainSecretKey, err := plugin.GenerateSecretKey(param)
+	if err != nil {
+		return err
+	}
+	param.PlainDataKey = plainSecretKey
+	return plugin.Encrypt(param)
+}
+
+func (d *KmsHandler) DecryptionHandler(param *HandlerParam) error {
+	if err := d.decryptionParamCheck(*param); err != nil {
+		return err
+	}
+	plugin, err := d.getPluginByDataIdPrefix(param.DataId)
+	if err != nil {
+		return err
+	}
+	plainSecretkey, err := plugin.DecryptSecretKey(param)
+	if err != nil {
+		return err
+	}
+	param.PlainDataKey = plainSecretkey
+	return plugin.Decrypt(param)
+}
+
+func (d *KmsHandler) getPluginByDataIdPrefix(dataId string) (Plugin, error) {
+	var (
+		matchedCount  int
+		matchedPlugin Plugin
+	)
+	for k, v := range d.encryptionPlugins {
+		if strings.Contains(dataId, k) {
+			if len(k) > matchedCount {
+				matchedCount = len(k)
+				matchedPlugin = v
+			}
+		}
+	}
+	if matchedPlugin == nil {
+		return matchedPlugin, PluginNotFoundError
+	}
+	return matchedPlugin, nil
+}
+
+func (d *KmsHandler) RegisterPlugin(plugin Plugin) error {
+	if _, v := d.encryptionPlugins[plugin.AlgorithmName()]; v {
+		logger.Warnf("encryption algorithm [%s] has already registered to defaultHandler, will be update", plugin.AlgorithmName())
+	} else {
+		logger.Debugf("register encryption algorithm [%s] to defaultHandler", plugin.AlgorithmName())
+	}
+	d.encryptionPlugins[plugin.AlgorithmName()] = plugin
+	return nil
+}
+
+func (d *KmsHandler) GetHandlerName() string {
+	return KmsHandlerName
+}
+
+func (d *KmsHandler) encryptionParamCheck(param HandlerParam) error {
+	if err := d.dataIdParamCheck(param.DataId); err != nil {
+		return DataIdParamCheckError
+	}
+	if err := d.contentParamCheck(param.Content); err != nil {
+		return ContentParamCheckError
+	}
+	return nil
+}
+
+func (d *KmsHandler) decryptionParamCheck(param HandlerParam) error {
+	return d.encryptionParamCheck(param)
+}
+
+func (d *KmsHandler) keyIdParamCheck(keyId string) error {
+	if len(keyId) == 0 {
+		return fmt.Errorf("cipher dataId using kmsService need to set keyId, but keyId is nil")
+	}
+	return nil
+}
+
+func (d *KmsHandler) dataIdParamCheck(dataId string) error {
+	if !strings.Contains(dataId, CipherPrefix) {
+		return fmt.Errorf("dataId prefix should start with: %s", CipherPrefix)
+	}
+	return nil
+}
+
+func (d *KmsHandler) contentParamCheck(content string) error {
+	if len(content) == 0 {
+		return fmt.Errorf("content need to encrypt is nil")
+	}
+	return nil
+}
+
+func innerNewKmsClient(clientConfig constant.ClientConfig) (kmsClient KmsClient, err error) {
+	switch clientConfig.KMSVersion {
+	case constant.KMSv1, constant.DEFAULT_KMS_VERSION:
+		kmsClient, err = newKmsRamClient(clientConfig)
+	case constant.KMSv3:
+		kmsClient, err = newKmsV3Client(clientConfig)
+	default:
+		err = fmt.Errorf("init kms client failed. unknown kms version:%s\n", clientConfig.KMSVersion)
+	}
+	return kmsClient, err
+}
+
+func newKmsV1Client(clientConfig constant.ClientConfig) (KmsClient, error) {
+	return NewKmsV1ClientWithAccessKey(clientConfig.RegionId, clientConfig.AccessKey, clientConfig.SecretKey)
+}
+
+func newKmsV3Client(clientConfig constant.ClientConfig) (KmsClient, error) {
+	return NewKmsV3ClientWithConfig(&dkms_api.Config{
+		Protocol:         tea.String("https"),
+		Endpoint:         tea.String(clientConfig.KMSv3Config.Endpoint),
+		ClientKeyContent: tea.String(clientConfig.KMSv3Config.ClientKeyContent),
+		Password:         tea.String(clientConfig.KMSv3Config.Password),
+	}, clientConfig.KMSv3Config.CaContent)
+}
+
+func newKmsRamClient(clientConfig constant.ClientConfig) (KmsClient, error) {
+	return NewKmsRamClient(clientConfig.KMSConfig, clientConfig.RegionId, clientConfig.AccessKey, clientConfig.SecretKey)
+}
--- a/common/encryption/kms_client.go
+++ b/common/encryption/kms_client.go
@ -0,0 +1,303 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encryption
+
+import (
+	"fmt"
+	openapi "github.com/alibabacloud-go/darabonba-openapi/v2/client"
+	kms20160120 "github.com/alibabacloud-go/kms-20160120/v3/client"
+	util "github.com/alibabacloud-go/tea-utils/v2/service"
+	"github.com/alibabacloud-go/tea/tea"
+	"github.com/aliyun/alibaba-cloud-sdk-go/services/kms"
+	dkms_api "github.com/aliyun/alibabacloud-dkms-gcs-go-sdk/openapi"
+	dkms_transfer "github.com/aliyun/alibabacloud-dkms-transfer-go-sdk/sdk"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/pkg/errors"
+	"net/http"
+	"strings"
+)
+
+type KmsClient interface {
+	Decrypt(cipherContent string) (string, error)
+	Encrypt(content string, keyId string) (string, error)
+	GenerateDataKey(keyId, keySpec string) (string, string, error)
+	GetKmsVersion() constant.KMSVersion
+	setKmsVersion(constant.KMSVersion)
+}
+
+type TransferKmsClient struct {
+	*dkms_transfer.KmsTransferClient
+	kmsVersion constant.KMSVersion
+}
+
+func NewKmsV1ClientWithAccessKey(regionId, ak, sk string) (*TransferKmsClient, error) {
+	var rErr error
+	if rErr = checkKmsV1InitParam(regionId, ak, sk); rErr != nil {
+		return nil, rErr
+	}
+	kmsClient, err := newKmsV1ClientWithAccessKey(regionId, ak, sk)
+	if err != nil {
+		rErr = errors.Wrap(err, "init kms v1 client with ak/sk failed")
+	} else {
+		kmsClient.setKmsVersion(constant.KMSv1)
+	}
+	return kmsClient, rErr
+}
+
+func checkKmsV1InitParam(regionId, ak, sk string) error {
+	if len(regionId) == 0 {
+		return EmptyRegionKmsV1ClientInitError
+	}
+	if len(ak) == 0 {
+		return EmptyAkKmsV1ClientInitError
+	}
+	if len(sk) == 0 {
+		return EmptySkKmsV1ClientInitError
+	}
+	return nil
+}
+
+func checkKmsRamInitParam(endpoint, ak, sk string) error {
+	if len(endpoint) == 0 {
+		return EmptyEndpointKmsRamClientInitError
+	}
+	if len(ak) == 0 {
+		return EmptyAkKmsV1ClientInitError
+	}
+	if len(sk) == 0 {
+		return EmptySkKmsV1ClientInitError
+	}
+	return nil
+}
+
+func NewKmsV3ClientWithConfig(config *dkms_api.Config, caVerify string) (*TransferKmsClient, error) {
+	var rErr error
+	if rErr = checkKmsV3InitParam(config, caVerify); rErr != nil {
+		return nil, rErr
+	}
+	kmsClient, err := newKmsV3ClientWithConfig(config)
+	if err != nil {
+		rErr = errors.Wrap(err, "init kms v3 client with config failed")
+	} else {
+		if len(strings.TrimSpace(caVerify)) != 0 {
+			logger.Debugf("set kms client Ca with content: %s\n", caVerify[:len(caVerify)/maskUnit32Width])
+			kmsClient.SetVerify(caVerify)
+		} else {
+			kmsClient.SetHTTPSInsecure(true)
+		}
+		kmsClient.setKmsVersion(constant.KMSv3)
+	}
+	return kmsClient, rErr
+}
+
+func checkKmsV3InitParam(config *dkms_api.Config, caVerify string) error {
+	if len(*config.Endpoint) == 0 {
+		return EmptyEndpointKmsV3ClientInitError
+	}
+	if len(*config.Password) == 0 {
+		return EmptyPasswordKmsV3ClientInitError
+	}
+	if len(*config.ClientKeyContent) == 0 {
+		return EmptyClientKeyContentKmsV3ClientInitError
+	}
+	if len(caVerify) == 0 {
+		return EmptyCaVerifyKmsV3ClientInitError
+	}
+	return nil
+}
+
+func newKmsV1ClientWithAccessKey(regionId, ak, sk string) (*TransferKmsClient, error) {
+	logger.Debugf("init kms client with region:[%s], ak:[%s]xxx, sk:[%s]xxx\n",
+		regionId, ak[:len(ak)/maskUnit8Width], sk[:len(sk)/maskUnit8Width])
+	return newKmsClient(regionId, ak, sk, nil)
+}
+
+func newKmsV3ClientWithConfig(config *dkms_api.Config) (*TransferKmsClient, error) {
+	logger.Debugf("init kms client with endpoint:[%s], clientKeyContent:[%s], password:[%s]\n",
+		config.Endpoint, (*config.ClientKeyContent)[:len(*config.ClientKeyContent)/maskUnit8Width],
+		(*config.Password)[:len(*config.Password)/maskUnit8Width])
+	return newKmsClient("", "", "", config)
+}
+
+func newKmsClient(regionId, ak, sk string, config *dkms_api.Config) (*TransferKmsClient, error) {
+	client, err := dkms_transfer.NewClientWithAccessKey(regionId, ak, sk, config)
+	if err != nil {
+		return nil, err
+	}
+	return &TransferKmsClient{
+		KmsTransferClient: client,
+	}, nil
+}
+
+func (kmsClient *TransferKmsClient) GetKmsVersion() constant.KMSVersion {
+	return kmsClient.kmsVersion
+}
+
+func (kmsClient *TransferKmsClient) setKmsVersion(kmsVersion constant.KMSVersion) {
+	logger.Debug("successfully set kms client version to " + kmsVersion)
+	kmsClient.kmsVersion = kmsVersion
+}
+
+func (kmsClient *TransferKmsClient) GenerateDataKey(keyId, keySpec string) (string, string, error) {
+	generateDataKeyRequest := kms.CreateGenerateDataKeyRequest()
+	generateDataKeyRequest.Scheme = kmsScheme
+	generateDataKeyRequest.AcceptFormat = kmsAcceptFormat
+	generateDataKeyRequest.KeyId = keyId
+	generateDataKeyRequest.KeySpec = keySpec
+	generateDataKeyResponse, err := kmsClient.KmsTransferClient.GenerateDataKey(generateDataKeyRequest)
+	if err != nil {
+		return "", "", err
+	}
+	return generateDataKeyResponse.Plaintext, generateDataKeyResponse.CiphertextBlob, nil
+}
+
+func (kmsClient *TransferKmsClient) Decrypt(cipherContent string) (string, error) {
+	request := kms.CreateDecryptRequest()
+	request.Method = http.MethodPost
+	request.Scheme = kmsScheme
+	request.AcceptFormat = kmsAcceptFormat
+	request.CiphertextBlob = cipherContent
+	response, err := kmsClient.KmsTransferClient.Decrypt(request)
+	if err != nil {
+		return "", fmt.Errorf("kms decrypt failed: %v", err)
+	}
+	return response.Plaintext, nil
+}
+
+func (kmsClient *TransferKmsClient) Encrypt(content, keyId string) (string, error) {
+	request := kms.CreateEncryptRequest()
+	request.Method = http.MethodPost
+	request.Scheme = kmsScheme
+	request.AcceptFormat = kmsAcceptFormat
+	request.Plaintext = content
+	request.KeyId = keyId
+	response, err := kmsClient.KmsTransferClient.Encrypt(request)
+	if err != nil {
+		return "", fmt.Errorf("kms encrypt failed: %v", err)
+	}
+	return response.CiphertextBlob, nil
+}
+
+func GetDefaultKMSv1KeyId() string {
+	return constant.MSE_KMSv1_DEFAULT_KEY_ID
+}
+
+type RamKmsClient struct {
+	*kms20160120.Client
+	kmsVersion constant.KMSVersion
+	runtime    *util.RuntimeOptions
+}
+
+func NewKmsRamClient(kmsConfig *constant.KMSConfig, regionId, ak, sk string) (*RamKmsClient, error) {
+	if kmsConfig == nil || len(kmsConfig.Endpoint) == 0 {
+		if err := checkKmsV1InitParam(regionId, ak, sk); err != nil {
+			return nil, err
+		}
+		KmsV1Config := &openapi.Config{}
+		KmsV1Config.AccessKeyId = tea.String(ak)
+		KmsV1Config.AccessKeySecret = tea.String(sk)
+		KmsV1Config.RegionId = tea.String(regionId)
+		_result, _err := kms20160120.NewClient(KmsV1Config)
+		if _err != nil {
+			return nil, _err
+		}
+		_ramClient := &RamKmsClient{
+			Client:     _result,
+			kmsVersion: constant.KMSv1,
+			runtime:    &util.RuntimeOptions{},
+		}
+		return _ramClient, nil
+	}
+	if err := checkKmsRamInitParam(kmsConfig.Endpoint, ak, sk); err != nil {
+		return nil, err
+	}
+	config := &openapi.Config{}
+	config.AccessKeyId = tea.String(ak)
+	config.AccessKeySecret = tea.String(sk)
+	if len(regionId) != 0 {
+		config.RegionId = tea.String(regionId)
+	}
+	config.Endpoint = tea.String(kmsConfig.Endpoint)
+	config.Ca = tea.String(kmsConfig.CaContent)
+	runtimeOption := &util.RuntimeOptions{}
+	if len(kmsConfig.CaContent) == 0 {
+		runtimeOption.IgnoreSSL = tea.Bool(true)
+	}
+	if kmsConfig.OpenSSL == "true" {
+		runtimeOption.IgnoreSSL = tea.Bool(false)
+	} else if kmsConfig.OpenSSL == "false" {
+		runtimeOption.IgnoreSSL = tea.Bool(true)
+	}
+	_result, _err := kms20160120.NewClient(config)
+	if _err != nil {
+		return nil, _err
+	}
+	_ramClient := &RamKmsClient{
+		Client:     _result,
+		kmsVersion: constant.KMSv3,
+		runtime:    runtimeOption,
+	}
+	return _ramClient, nil
+}
+
+func (kmsClient *RamKmsClient) GetKmsVersion() constant.KMSVersion {
+	return kmsClient.kmsVersion
+}
+
+func (kmsClient *RamKmsClient) setKmsVersion(kmsVersion constant.KMSVersion) {
+	logger.Debug("successfully set kms client version to " + kmsVersion)
+	kmsClient.kmsVersion = kmsVersion
+}
+
+func (kmsClient *RamKmsClient) GenerateDataKey(keyId, keySpec string) (string, string, error) {
+	request := &kms20160120.GenerateDataKeyRequest{
+		KeyId:   tea.String(keyId),
+		KeySpec: tea.String(keySpec),
+	}
+
+	_body, _err := kmsClient.Client.GenerateDataKeyWithOptions(request, kmsClient.runtime)
+
+	if _err != nil {
+		return "", "", _err
+	}
+	return *_body.Body.Plaintext, *_body.Body.CiphertextBlob, nil
+}
+
+func (kmsClient *RamKmsClient) Decrypt(cipherContent string) (string, error) {
+	request := &kms20160120.DecryptRequest{
+		CiphertextBlob: tea.String(cipherContent),
+	}
+
+	_body, _err := kmsClient.Client.DecryptWithOptions(request, kmsClient.runtime)
+	if _err != nil {
+		return "", _err
+	}
+	return *_body.Body.Plaintext, nil
+}
+
+func (kmsClient *RamKmsClient) Encrypt(content, keyId string) (string, error) {
+	request := &kms20160120.EncryptRequest{
+		Plaintext: tea.String(content),
+		KeyId:     tea.String(keyId),
+	}
+	_body, _err := kmsClient.Client.EncryptWithOptions(request, kmsClient.runtime)
+	if _err != nil {
+		return "", _err
+	}
+	return *_body.Body.CiphertextBlob, nil
+}
--- a/common/encryption/kms_plugins.go
+++ b/common/encryption/kms_plugins.go
@ -0,0 +1,299 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package encryption
+
+import (
+	"fmt"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	inner_encoding "github.com/nacos-group/nacos-sdk-go/v2/common/encoding"
+	"strings"
+)
+
+type kmsPlugin struct {
+	kmsClient KmsClient
+}
+
+func (k *kmsPlugin) Encrypt(param *HandlerParam) error {
+	err := k.encryptionParamCheck(*param)
+	if err != nil {
+		return err
+	}
+	secretKeyBase64Decoded, err := inner_encoding.DecodeBase64(inner_encoding.DecodeString2Utf8Bytes(param.PlainDataKey))
+	if err != nil {
+		return err
+	}
+	contentUtf8Bytes := inner_encoding.DecodeString2Utf8Bytes(param.Content)
+	encryptedContent, err := AesEcbPkcs5PaddingEncrypt(contentUtf8Bytes, secretKeyBase64Decoded)
+	if err != nil {
+		return err
+	}
+	contentBase64Encoded, err := inner_encoding.EncodeBase64(encryptedContent)
+	if err != nil {
+		return err
+	}
+	param.Content = inner_encoding.EncodeUtf8Bytes2String(contentBase64Encoded)
+	return nil
+}
+
+func (k *kmsPlugin) Decrypt(param *HandlerParam) error {
+	err := k.decryptionParamCheck(*param)
+	if err != nil {
+		return err
+	}
+	secretKeyBase64Decoded, err := inner_encoding.DecodeBase64(inner_encoding.DecodeString2Utf8Bytes(param.PlainDataKey))
+	if err != nil {
+		return err
+	}
+	contentBase64Decoded, err := inner_encoding.DecodeBase64(inner_encoding.DecodeString2Utf8Bytes(param.Content))
+	if err != nil {
+		return err
+	}
+	decryptedContent, err := AesEcbPkcs5PaddingDecrypt(contentBase64Decoded, secretKeyBase64Decoded)
+	if err != nil {
+		return err
+	}
+	param.Content = inner_encoding.EncodeUtf8Bytes2String(decryptedContent)
+	return nil
+}
+
+func (k *kmsPlugin) AlgorithmName() string {
+	return ""
+}
+
+func (k *kmsPlugin) GenerateSecretKey(param *HandlerParam) (string, error) {
+	return "", nil
+}
+
+func (k *kmsPlugin) EncryptSecretKey(param *HandlerParam) (string, error) {
+	var keyId string
+	var err error
+	if keyId, err = k.keyIdParamCheck(param.KeyId); err != nil {
+		return "", err
+	}
+	if len(param.PlainDataKey) == 0 {
+		return "", EmptyPlainDataKeyError
+	}
+	encryptedDataKey, err := k.kmsClient.Encrypt(param.PlainDataKey, keyId)
+	if err != nil {
+		return "", err
+	}
+	if len(encryptedDataKey) == 0 {
+		return "", EmptyEncryptedDataKeyError
+	}
+	param.EncryptedDataKey = encryptedDataKey
+	return encryptedDataKey, nil
+}
+
+func (k *kmsPlugin) DecryptSecretKey(param *HandlerParam) (string, error) {
+	if len(param.EncryptedDataKey) == 0 {
+		return "", EmptyEncryptedDataKeyError
+	}
+	plainDataKey, err := k.kmsClient.Decrypt(param.EncryptedDataKey)
+	if err != nil {
+		return "", err
+	}
+	if len(plainDataKey) == 0 {
+		return "", EmptyPlainDataKeyError
+	}
+	param.PlainDataKey = plainDataKey
+	return plainDataKey, nil
+}
+
+func (k *kmsPlugin) encryptionParamCheck(param HandlerParam) error {
+	if err := k.plainDataKeyParamCheck(param.PlainDataKey); err != nil {
+		return KeyIdParamCheckError
+	}
+	if err := k.contentParamCheck(param.Content); err != nil {
+		return ContentParamCheckError
+	}
+	return nil
+}
+
+func (k *kmsPlugin) decryptionParamCheck(param HandlerParam) error {
+	return k.encryptionParamCheck(param)
+}
+
+func (k *kmsPlugin) plainDataKeyParamCheck(plainDataKey string) error {
+	if len(plainDataKey) == 0 {
+		return EmptyPlainDataKeyError
+	}
+	return nil
+}
+
+func (k *kmsPlugin) dataIdParamCheck(dataId string) error {
+	if !strings.Contains(dataId, CipherPrefix) {
+		return fmt.Errorf("dataId prefix should start with: %s", CipherPrefix)
+	}
+	return nil
+}
+
+func (k *kmsPlugin) keyIdParamCheck(keyId string) (string, error) {
+	if len(strings.TrimSpace(keyId)) == 0 {
+		if k.kmsClient.GetKmsVersion() == constant.KMSv1 {
+			return GetDefaultKMSv1KeyId(), nil
+		}
+		return "", KeyIdParamCheckError
+	}
+	return keyId, nil
+}
+
+func (k *kmsPlugin) contentParamCheck(content string) error {
+	if len(content) == 0 {
+		return fmt.Errorf("content need to encrypt is nil")
+	}
+	return nil
+}
+
+type KmsAes128Plugin struct {
+	kmsPlugin
+}
+
+func (k *KmsAes128Plugin) Encrypt(param *HandlerParam) error {
+	return k.kmsPlugin.Encrypt(param)
+}
+
+func (k *KmsAes128Plugin) Decrypt(param *HandlerParam) error {
+	return k.kmsPlugin.Decrypt(param)
+}
+
+func (k *KmsAes128Plugin) AlgorithmName() string {
+	return KmsAes128AlgorithmName
+}
+
+func (k *KmsAes128Plugin) GenerateSecretKey(param *HandlerParam) (string, error) {
+	var keyId string
+	var err error
+	if keyId, err = k.keyIdParamCheck(param.KeyId); err != nil {
+		return "", err
+	}
+	plainSecretKey, encryptedSecretKey, err := k.kmsClient.GenerateDataKey(keyId, kmsAes128KeySpec)
+	if err != nil {
+		return "", err
+	}
+	param.PlainDataKey = plainSecretKey
+	param.EncryptedDataKey = encryptedSecretKey
+	if len(param.PlainDataKey) == 0 {
+		return "", EmptyPlainDataKeyError
+	}
+	if len(param.EncryptedDataKey) == 0 {
+		return "", EmptyEncryptedDataKeyError
+	}
+	return plainSecretKey, nil
+}
+
+func (k *KmsAes128Plugin) EncryptSecretKey(param *HandlerParam) (string, error) {
+	return k.kmsPlugin.EncryptSecretKey(param)
+}
+
+func (k *KmsAes128Plugin) DecryptSecretKey(param *HandlerParam) (string, error) {
+	return k.kmsPlugin.DecryptSecretKey(param)
+}
+
+type KmsAes256Plugin struct {
+	kmsPlugin
+}
+
+func (k *KmsAes256Plugin) Encrypt(param *HandlerParam) error {
+	return k.kmsPlugin.Encrypt(param)
+
+}
+
+func (k *KmsAes256Plugin) Decrypt(param *HandlerParam) error {
+	return k.kmsPlugin.Decrypt(param)
+}
+
+func (k *KmsAes256Plugin) AlgorithmName() string {
+	return KmsAes256AlgorithmName
+}
+
+func (k *KmsAes256Plugin) GenerateSecretKey(param *HandlerParam) (string, error) {
+	var keyId string
+	var err error
+	if keyId, err = k.keyIdParamCheck(param.KeyId); err != nil {
+		return "", err
+	}
+	plainSecretKey, encryptedSecretKey, err := k.kmsClient.GenerateDataKey(keyId, kmsAes256KeySpec)
+	if err != nil {
+		return "", err
+	}
+	param.PlainDataKey = plainSecretKey
+	param.EncryptedDataKey = encryptedSecretKey
+	if len(param.PlainDataKey) == 0 {
+		return "", EmptyPlainDataKeyError
+	}
+	if len(param.EncryptedDataKey) == 0 {
+		return "", EmptyEncryptedDataKeyError
+	}
+	return plainSecretKey, nil
+}
+
+func (k *KmsAes256Plugin) EncryptSecretKey(param *HandlerParam) (string, error) {
+	return k.kmsPlugin.EncryptSecretKey(param)
+}
+
+func (k *KmsAes256Plugin) DecryptSecretKey(param *HandlerParam) (string, error) {
+	return k.kmsPlugin.DecryptSecretKey(param)
+}
+
+type KmsBasePlugin struct {
+	kmsPlugin
+}
+
+func (k *KmsBasePlugin) Encrypt(param *HandlerParam) error {
+	var keyId string
+	var err error
+	if keyId, err = k.keyIdParamCheck(param.KeyId); err != nil {
+		return err
+	}
+	if len(param.Content) == 0 {
+		return EmptyContentError
+	}
+	encryptedContent, err := k.kmsClient.Encrypt(param.Content, keyId)
+	if err != nil {
+		return err
+	}
+	param.Content = encryptedContent
+	return nil
+}
+
+func (k *KmsBasePlugin) Decrypt(param *HandlerParam) error {
+	if len(param.Content) == 0 {
+		return nil
+	}
+	plainContent, err := k.kmsClient.Decrypt(param.Content)
+	if err != nil {
+		return err
+	}
+	param.Content = plainContent
+	return nil
+}
+
+func (k *KmsBasePlugin) AlgorithmName() string {
+	return KmsAlgorithmName
+}
+
+func (k *KmsBasePlugin) GenerateSecretKey(param *HandlerParam) (string, error) {
+	return "", nil
+}
+
+func (k *KmsBasePlugin) EncryptSecretKey(param *HandlerParam) (string, error) {
+	return "", nil
+}
+
+func (k *KmsBasePlugin) DecryptSecretKey(param *HandlerParam) (string, error) {
+	return "", nil
+}
--- a/common/file/file.go
+++ b/common/file/file.go
@ -0,0 +1,89 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package file
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+var osType string
+var path string
+
+const WINDOWS = "windows"
+
+func init() {
+	osType = runtime.GOOS
+	if os.IsPathSeparator('\\') { //前边的判断是否是系统的分隔符
+		path = "\\"
+	} else {
+		path = "/"
+	}
+}
+
+func MkdirIfNecessary(createDir string) (err error) {
+	s := strings.Split(createDir, path)
+	startIndex := 0
+	dir := ""
+	if s[0] == "" {
+		startIndex = 1
+	} else {
+		dir, _ = os.Getwd() //当前的目录
+	}
+	for i := startIndex; i < len(s); i++ {
+		var d string
+		if osType == WINDOWS && filepath.IsAbs(createDir) {
+			d = strings.Join(s[startIndex:i+1], path)
+		} else {
+			d = dir + path + strings.Join(s[startIndex:i+1], path)
+		}
+		if _, e := os.Stat(d); os.IsNotExist(e) {
+			err = os.Mkdir(d, os.ModePerm) //在当前目录下生成md目录
+			if err != nil {
+				break
+			}
+		}
+	}
+
+	return err
+}
+
+func GetCurrentPath() string {
+
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	if err != nil {
+		log.Println("can not get current path")
+	}
+	return dir
+}
+
+func IsExistFile(filePath string) bool {
+	if len(filePath) == 0 {
+		return false
+	}
+	_, err := os.Stat(filePath)
+	if err == nil {
+		return true
+	}
+	if os.IsNotExist(err) {
+		return false
+	}
+	return false
+}
--- a/common/file/file_test.go
+++ b/common/file/file_test.go
@ -0,0 +1,30 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package file
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMkdirIfNecessaryForAbsPath(t *testing.T) {
+	path := GetCurrentPath() + string(os.PathSeparator) + "log"
+	err := MkdirIfNecessary(path)
+	assert.Nil(t, err)
+}
--- a/common/filter/config_encryption_filter.go
+++ b/common/filter/config_encryption_filter.go
@ -0,0 +1,87 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package filter
+
+import (
+	nacos_inner_encryption "github.com/nacos-group/nacos-sdk-go/v2/common/encryption"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+	"github.com/pkg/errors"
+	"strings"
+)
+
+const (
+	defaultConfigEncryptionFilterName = "defaultConfigEncryptionFilter"
+)
+
+var (
+	noNeedEncryptionError = errors.New("dataId doesn't need to encrypt/decrypt.")
+)
+
+type DefaultConfigEncryptionFilter struct {
+	handler nacos_inner_encryption.Handler
+}
+
+func NewDefaultConfigEncryptionFilter(handler nacos_inner_encryption.Handler) IConfigFilter {
+	return &DefaultConfigEncryptionFilter{handler}
+}
+
+func (d *DefaultConfigEncryptionFilter) DoFilter(param *vo.ConfigParam) error {
+	if err := d.paramCheck(*param); err != nil {
+		if errors.Is(err, noNeedEncryptionError) {
+			return nil
+		}
+	}
+	if param.UsageType == vo.RequestType {
+		encryptionParam := &nacos_inner_encryption.HandlerParam{
+			DataId:  param.DataId,
+			Content: param.Content,
+			KeyId:   param.KmsKeyId,
+		}
+		if err := d.handler.EncryptionHandler(encryptionParam); err != nil {
+			return err
+		}
+		param.Content = encryptionParam.Content
+		param.EncryptedDataKey = encryptionParam.EncryptedDataKey
+
+	} else if param.UsageType == vo.ResponseType {
+		decryptionParam := &nacos_inner_encryption.HandlerParam{
+			DataId:           param.DataId,
+			Content:          param.Content,
+			EncryptedDataKey: param.EncryptedDataKey,
+		}
+		if err := d.handler.DecryptionHandler(decryptionParam); err != nil {
+			return err
+		}
+		param.Content = decryptionParam.Content
+	}
+	return nil
+}
+
+func (d *DefaultConfigEncryptionFilter) GetOrder() int {
+	return 0
+}
+
+func (d *DefaultConfigEncryptionFilter) GetFilterName() string {
+	return defaultConfigEncryptionFilterName
+}
+func (d *DefaultConfigEncryptionFilter) paramCheck(param vo.ConfigParam) error {
+	if !strings.HasPrefix(param.DataId, nacos_inner_encryption.CipherPrefix) ||
+		len(strings.TrimSpace(param.Content)) == 0 {
+		return noNeedEncryptionError
+	}
+	return nil
+}
--- a/common/filter/config_filter.go
+++ b/common/filter/config_filter.go
@ -0,0 +1,104 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package filter
+
+import (
+	"fmt"
+	"github.com/nacos-group/nacos-sdk-go/v2/vo"
+)
+
+type IConfigFilterChain interface {
+	AddFilter(IConfigFilter) error
+	GetFilters() []IConfigFilter
+	DoFilters(*vo.ConfigParam) error
+	DoFilterByName(*vo.ConfigParam, string) error
+}
+
+type IConfigFilter interface {
+	DoFilter(*vo.ConfigParam) error
+	GetOrder() int
+	GetFilterName() string
+}
+
+func RegisterConfigFilterToChain(chain IConfigFilterChain, filter IConfigFilter) error {
+	return chain.AddFilter(filter)
+}
+
+func NewConfigFilterChainManager() IConfigFilterChain {
+	return newConfigFilterChainManager()
+}
+
+func newConfigFilterChainManager() *DefaultConfigFilterChainManager {
+	return &DefaultConfigFilterChainManager{
+		configFilterPriorityQueue: make([]IConfigFilter, 0, 2),
+	}
+}
+
+type DefaultConfigFilterChainManager struct {
+	configFilterPriorityQueue
+}
+
+func (m *DefaultConfigFilterChainManager) AddFilter(filter IConfigFilter) error {
+	return m.configFilterPriorityQueue.addFilter(filter)
+}
+
+func (m *DefaultConfigFilterChainManager) GetFilters() []IConfigFilter {
+	return m.configFilterPriorityQueue
+}
+
+func (m *DefaultConfigFilterChainManager) DoFilters(param *vo.ConfigParam) error {
+	for index := 0; index < len(m.GetFilters()); index++ {
+		if err := m.GetFilters()[index].DoFilter(param); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (m *DefaultConfigFilterChainManager) DoFilterByName(param *vo.ConfigParam, name string) error {
+	for index := 0; index < len(m.GetFilters()); index++ {
+		if m.GetFilters()[index].GetFilterName() == name {
+			if err := m.GetFilters()[index].DoFilter(param); err != nil {
+				return err
+			}
+			return nil
+		}
+	}
+	return fmt.Errorf("cannot find the filter[%s]", name)
+}
+
+type configFilterPriorityQueue []IConfigFilter
+
+func (c *configFilterPriorityQueue) addFilter(filter IConfigFilter) error {
+	var pos int = len(*c)
+	for i := 0; i < len(*c); i++ {
+		if filter.GetFilterName() == (*c)[i].GetFilterName() {
+			return nil
+		}
+		if filter.GetOrder() < (*c)[i].GetOrder() {
+			pos = i
+			break
+		}
+	}
+	if pos == len(*c) {
+		*c = append((*c)[:], filter)
+	} else {
+		temp := append((*c)[:pos], filter)
+		*c = append(temp[:], (*c)[pos:]...)
+	}
+	return nil
+}
--- a/common/http_agent/delete.go
+++ b/common/http_agent/delete.go
@ -1,31 +1,40 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import (
 	"net/http"
+	"net/url"
 	"strings"
 	"time"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-08 14:08
-**/
-
-func delete(path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
-	if !strings.HasSuffix(path, "?") {
-		path = path + "?"
+func delete(client *http.Client, path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
+	if len(params) > 0 {
+		if !strings.HasSuffix(path, "?") {
+			path = path + "?"
+		}
+		for key, value := range params {
+			path = path + key + "=" + url.QueryEscape(value) + "&"
+		}
+		if strings.HasSuffix(path, "&") {
+			path = path[:len(path)-1]
+		}
 	}
-	for key, value := range params {
-		path = path + key + "=" + value + "&"
-	}
-	if strings.HasSuffix(path, "&") {
-		path = path[:len(path)-1]
-	}
-	client := http.Client{}
 	client.Timeout = time.Millisecond * time.Duration(timeoutMs)
 	request, errNew := http.NewRequest(http.MethodDelete, path, nil)
 	if errNew != nil {
--- a/common/http_agent/fake_http_response.go
+++ b/common/http_agent/fake_http_response.go
@ -1,3 +1,19 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import (
@ -7,14 +23,6 @@ import (
 	"strconv"
 )

-/**
-*
-* @description : mock http response
-*
-* @author : codezhang
-*
-* @create : 2019-01-11 12:10
-**/
 type fakeHttpResponseBody struct {
 	body io.ReadSeeker
 }
--- a/common/http_agent/get.go
+++ b/common/http_agent/get.go
@ -1,31 +1,43 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import (
 	"net/http"
+	"net/url"
 	"strings"
 	"time"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-07 15:13
-**/
-
-func get(path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
-	if !strings.HasSuffix(path, "?") {
+func get(client *http.Client, path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
+	if !strings.Contains(path, "?") {
 		path = path + "?"
 	}
+
 	for key, value := range params {
-		path = path + key + "=" + value + "&"
+		if !strings.HasSuffix(path, "&") {
+			path = path + "&"
+		}
+		path = path + key + "=" + url.QueryEscape(value) + "&"
 	}
 	if strings.HasSuffix(path, "&") {
 		path = path[:len(path)-1]
 	}
-	client := http.Client{}
+
 	client.Timeout = time.Millisecond * time.Duration(timeoutMs)
 	request, errNew := http.NewRequest(http.MethodGet, path, nil)
 	if errNew != nil {
@ -34,6 +46,7 @@ func get(path string, header http.Header, timeoutMs uint64, params map[string]st
 	}
 	request.Header = header
 	resp, errDo := client.Do(request)
+
 	if errDo != nil {
 		err = errDo
 	} else {
--- a/common/http_agent/http_agent.go
+++ b/common/http_agent/http_agent.go
@ -1,27 +1,44 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import (
-	"github.com/go-errors/errors"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"io/ioutil"
-	"log"
+	"io"
 	"net/http"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/tls"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/pkg/errors"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-10 11:26
-**/
 type HttpAgent struct {
+	TlsConfig constant.TLSConfig
 }

 func (agent *HttpAgent) Get(path string, header http.Header, timeoutMs uint64,
 	params map[string]string) (response *http.Response, err error) {
-	return get(path, header, timeoutMs, params)
+	client, err := agent.createClient()
+	if err != nil {
+		return nil, err
+	}
+	return get(client, path, header, timeoutMs, params)
 }

 func (agent *HttpAgent) RequestOnlyResult(method string, path string, header http.Header, timeoutMs uint64, params map[string]string) string {
@ -41,20 +58,20 @@ func (agent *HttpAgent) RequestOnlyResult(method string, path string, header htt
 		response, err = agent.Delete(path, header, timeoutMs, params)
 		break
 	default:
-		log.Printf("[ERROR]:request method[%s], path[%s],header:[%s],params:[%s], not avaliable method ", method, path, utils.ToJsonString(header), utils.ToJsonString(params))
+		logger.Errorf("request method[%s], path[%s],header:[%s],params:[%s], not avaliable method ", method, path, util.ToJsonString(header), util.ToJsonString(params))
 	}
 	if err != nil {
-		log.Printf("[ERROR]:request method[%s],request path[%s],header:[%s],params:[%s],err:%s", method, path, utils.ToJsonString(header), utils.ToJsonString(params), err.Error())
+		logger.Errorf("request method[%s],request path[%s],header:[%s],params:[%s],err:%+v", method, path, util.ToJsonString(header), util.ToJsonString(params), err)
 		return ""
 	}
-	if response.StatusCode != 200 {
-		log.Printf("[ERROR]:request method[%s],request path[%s],header:[%s],params:[%s],status code error:%d", method, path, utils.ToJsonString(header), utils.ToJsonString(params), response.StatusCode)
+	if response.StatusCode != constant.RESPONSE_CODE_SUCCESS {
+		logger.Errorf("request method[%s],request path[%s],header:[%s],params:[%s],status code error:%d", method, path, util.ToJsonString(header), util.ToJsonString(params), response.StatusCode)
 		return ""
 	}
-	bytes, errRead := ioutil.ReadAll(response.Body)
+	bytes, errRead := io.ReadAll(response.Body)
 	defer response.Body.Close()
 	if errRead != nil {
-		log.Printf("[ERROR]:request method[%s],request path[%s],header:[%s],params:[%s],read error:%s", method, path, utils.ToJsonString(header), utils.ToJsonString(params), errRead.Error())
+		logger.Errorf("request method[%s],request path[%s],header:[%s],params:[%s],read error:%+v", method, path, util.ToJsonString(header), util.ToJsonString(params), errRead)
 		return ""
 	}
 	return string(bytes)
@ -76,20 +93,44 @@ func (agent *HttpAgent) Request(method string, path string, header http.Header,
 		response, err = agent.Delete(path, header, timeoutMs, params)
 		return
 	default:
-		err = errors.New("not avaliable method")
-		log.Printf("[ERROR]:request method[%s], path[%s],header:[%s],params:[%s], not avaliable method ", method, path, utils.ToJsonString(header), utils.ToJsonString(params))
+		err = errors.New("not available method")
+		logger.Errorf("request method[%s], path[%s],header:[%s],params:[%s], not available method ", method, path, util.ToJsonString(header), util.ToJsonString(params))
 	}
 	return
 }
 func (agent *HttpAgent) Post(path string, header http.Header, timeoutMs uint64,
 	params map[string]string) (response *http.Response, err error) {
-	return post(path, header, timeoutMs, params)
+	client, err := agent.createClient()
+	if err != nil {
+		return nil, err
+	}
+	return post(client, path, header, timeoutMs, params)
 }
 func (agent *HttpAgent) Delete(path string, header http.Header, timeoutMs uint64,
 	params map[string]string) (response *http.Response, err error) {
-	return delete(path, header, timeoutMs, params)
+	client, err := agent.createClient()
+	if err != nil {
+		return nil, err
+	}
+	return delete(client, path, header, timeoutMs, params)
 }
 func (agent *HttpAgent) Put(path string, header http.Header, timeoutMs uint64,
 	params map[string]string) (response *http.Response, err error) {
-	return put(path, header, timeoutMs, params)
+	client, err := agent.createClient()
+	if err != nil {
+		return nil, err
+	}
+	return put(client, path, header, timeoutMs, params)
+}
+
+func (agent *HttpAgent) createClient() (*http.Client, error) {
+	if !agent.TlsConfig.Enable {
+		return &http.Client{}, nil
+	}
+	cfg, err := tls.NewTLS(agent.TlsConfig)
+	if err != nil {
+		return nil, err
+	}
+	return &http.Client{Transport: &http.Transport{TLSClientConfig: cfg}}, nil
+
 }
--- a/common/http_agent/http_agent_interface.go
+++ b/common/http_agent/http_agent_interface.go
@ -1,16 +1,23 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import "net/http"

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-10 11:07
-**/
-
 //go:generate mockgen -destination ../../mock/mock_http_agent_interface.go -package mock -source=./http_agent_interface.go

 type IHttpAgent interface {
--- a/common/http_agent/post.go
+++ b/common/http_agent/post.go
@ -1,32 +1,32 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package http_agent

 import (
 	"net/http"
 	"strings"
 	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-07 15:13
-**/
-
-func post(path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
-	client := http.Client{}
+func post(client *http.Client, path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
 	client.Timeout = time.Millisecond * time.Duration(timeoutMs)
-	var body string
-	for key, value := range params {
-		if len(value) > 0 {
-			body += key + "=" + value + "&"
-		}
-	}
-	if strings.HasSuffix(body, "&") {
-		body = body[:len(body)-1]
-	}
+
+	body := util.GetUrlFormedMap(params)
 	request, errNew := http.NewRequest(http.MethodPost, path, strings.NewReader(body))
 	if errNew != nil {
 		err = errNew
--- a/common/http_agent/put.go
+++ b/common/http_agent/put.go
@ -1,23 +1,28 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package http_agent

 import (
-	"log"
 	"net/http"
 	"strings"
 	"time"
 )

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-09 11:24
-**/
-
-func put(path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
-	client := http.Client{}
+func put(client *http.Client, path string, header http.Header, timeoutMs uint64, params map[string]string) (response *http.Response, err error) {
 	client.Timeout = time.Millisecond * time.Duration(timeoutMs)
 	var body string
 	for key, value := range params {
@ -36,7 +41,6 @@ func put(path string, header http.Header, timeoutMs uint64, params map[string]st
 	request.Header = header
 	resp, errDo := client.Do(request)
 	if errDo != nil {
-		log.Println(errDo)
 		err = errDo
 	} else {
 		response = resp
--- a/common/logger/logger.go
+++ b/common/logger/logger.go
@ -1,25 +1,182 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package logger

 import (
-	"github.com/lestrrat/go-file-rotatelogs"
-	"github.com/nacos-group/nacos-sdk-go/common/util"
-	"log"
 	"os"
-	"path/filepath"
+	"sync"
 	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"gopkg.in/natefinch/lumberjack.v2"
 )

-func InitLog(logDir string) error {
-	err := util.MkdirIfNecessary(logDir)
-	if err != nil {
-		return err
-	}
-	logDir = logDir + string(os.PathSeparator)
-	rl, err := rotatelogs.New(filepath.Join(logDir, "nacos-sdk.log-%Y%m%d%H%M"), rotatelogs.WithRotationTime(time.Hour), rotatelogs.WithMaxAge(48*time.Hour), rotatelogs.WithLinkName(filepath.Join(logDir, "nacos-sdk.log")))
-	if err != nil {
-		return err
-	}
-	log.SetOutput(rl)
-	log.SetFlags(log.LstdFlags)
-	return nil
+var (
+	logger  Logger
+	logLock sync.RWMutex
+)
+
+var levelMap = map[string]zapcore.Level{
+	"debug": zapcore.DebugLevel,
+	"info":  zapcore.InfoLevel,
+	"warn":  zapcore.WarnLevel,
+	"error": zapcore.ErrorLevel,
+}
+
+type Config struct {
+	Level            string
+	Sampling         *SamplingConfig
+	AppendToStdout   bool
+	LogRollingConfig *lumberjack.Logger
+}
+
+type SamplingConfig struct {
+	Initial    int
+	Thereafter int
+	Tick       time.Duration
+}
+
+type NacosLogger struct {
+	Logger
+}
+
+// Logger is the interface for Logger types
+type Logger interface {
+	Info(args ...interface{})
+	Warn(args ...interface{})
+	Error(args ...interface{})
+	Debug(args ...interface{})
+
+	Infof(fmt string, args ...interface{})
+	Warnf(fmt string, args ...interface{})
+	Errorf(fmt string, args ...interface{})
+	Debugf(fmt string, args ...interface{})
+}
+
+func init() {
+	zapLoggerConfig := zap.NewDevelopmentConfig()
+	zapLoggerEncoderConfig := zapcore.EncoderConfig{
+		TimeKey:        "time",
+		LevelKey:       "level",
+		NameKey:        "logger",
+		CallerKey:      "caller",
+		MessageKey:     "message",
+		StacktraceKey:  "stacktrace",
+		EncodeLevel:    zapcore.CapitalColorLevelEncoder,
+		EncodeTime:     zapcore.ISO8601TimeEncoder,
+		EncodeDuration: zapcore.SecondsDurationEncoder,
+		EncodeCaller:   zapcore.ShortCallerEncoder,
+	}
+	zapLoggerConfig.EncoderConfig = zapLoggerEncoderConfig
+	zapLogger, _ := zapLoggerConfig.Build(zap.AddCaller(), zap.AddCallerSkip(1))
+	SetLogger(&NacosLogger{zapLogger.Sugar()})
+}
+
+func BuildLoggerConfig(clientConfig constant.ClientConfig) Config {
+	loggerConfig := Config{
+		Level:          clientConfig.LogLevel,
+		AppendToStdout: clientConfig.AppendToStdout,
+	}
+	if clientConfig.LogSampling != nil {
+		loggerConfig.Sampling = &SamplingConfig{
+			Initial:    clientConfig.LogSampling.Initial,
+			Thereafter: clientConfig.LogSampling.Thereafter,
+			Tick:       clientConfig.LogSampling.Tick,
+		}
+	}
+	loggerConfig.LogRollingConfig = &lumberjack.Logger{
+		Filename: clientConfig.LogDir + string(os.PathSeparator) + constant.LOG_FILE_NAME,
+	}
+	logRollingConfig := clientConfig.LogRollingConfig
+	if logRollingConfig != nil {
+		loggerConfig.LogRollingConfig.MaxSize = logRollingConfig.MaxSize
+		loggerConfig.LogRollingConfig.MaxAge = logRollingConfig.MaxAge
+		loggerConfig.LogRollingConfig.MaxBackups = logRollingConfig.MaxBackups
+		loggerConfig.LogRollingConfig.LocalTime = logRollingConfig.LocalTime
+		loggerConfig.LogRollingConfig.Compress = logRollingConfig.Compress
+	} else {
+		loggerConfig.LogRollingConfig.MaxSize = 100
+		loggerConfig.LogRollingConfig.MaxAge = 30
+		loggerConfig.LogRollingConfig.MaxBackups = 5
+		loggerConfig.LogRollingConfig.LocalTime = true
+		loggerConfig.LogRollingConfig.Compress = false
+	}
+	return loggerConfig
+}
+
+// InitLogger is init global logger for nacos
+func InitLogger(config Config) (err error) {
+	logLock.Lock()
+	defer logLock.Unlock()
+	logger, err = InitNacosLogger(config)
+	return
+}
+
+// InitNacosLogger is init nacos default logger
+func InitNacosLogger(config Config) (Logger, error) {
+	logLevel := getLogLevel(config.Level)
+	encoder := getEncoder()
+	writer := config.getLogWriter()
+	if config.AppendToStdout {
+		writer = zapcore.NewMultiWriteSyncer(writer, zapcore.AddSync(os.Stdout))
+	}
+	core := zapcore.NewCore(zapcore.NewConsoleEncoder(encoder), writer, logLevel)
+	zaplogger := zap.New(core, zap.AddCaller(), zap.AddCallerSkip(1))
+	return &NacosLogger{zaplogger.Sugar()}, nil
+}
+
+func getLogLevel(level string) zapcore.Level {
+	if zapLevel, ok := levelMap[level]; ok {
+		return zapLevel
+	}
+	return zapcore.InfoLevel
+}
+
+func getEncoder() zapcore.EncoderConfig {
+	return zapcore.EncoderConfig{
+		TimeKey:        "time",
+		LevelKey:       "level",
+		NameKey:        "logger",
+		CallerKey:      "caller",
+		MessageKey:     "message",
+		StacktraceKey:  "stacktrace",
+		EncodeLevel:    zapcore.CapitalLevelEncoder,
+		EncodeTime:     zapcore.ISO8601TimeEncoder,
+		EncodeDuration: zapcore.SecondsDurationEncoder,
+		EncodeCaller:   zapcore.ShortCallerEncoder,
+	}
+}
+
+// SetLogger sets logger for sdk
+func SetLogger(log Logger) {
+	logLock.Lock()
+	defer logLock.Unlock()
+	logger = log
+}
+
+func GetLogger() Logger {
+	logLock.RLock()
+	defer logLock.RUnlock()
+	return logger
+}
+
+// getLogWriter get Lumberjack writer by LumberjackConfig
+func (c *Config) getLogWriter() zapcore.WriteSyncer {
+	return zapcore.AddSync(c.LogRollingConfig)
 }
--- a/common/logger/logger_test.go
+++ b/common/logger/logger_test.go
@ -0,0 +1,124 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package logger
+
+import (
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func reset() {
+	SetLogger(nil)
+}
+
+func TestInitLogger(t *testing.T) {
+	config := Config{
+		Level: "degug",
+	}
+	err := InitLogger(config)
+	assert.NoError(t, err)
+	reset()
+}
+
+func TestGetLogger(t *testing.T) {
+	// not yet init get default log
+	log := GetLogger()
+	config := Config{
+		Level: "debug",
+	}
+	_ = InitLogger(config)
+	// after init logger
+	log2 := GetLogger()
+	assert.NotEqual(t, log, log2)
+
+	reset()
+}
+
+func TestSetLogger(t *testing.T) {
+	// not yet init get default log
+	log := GetLogger()
+	log1 := &mockLogger{}
+	SetLogger(log1)
+
+	// after set logger
+	log2 := GetLogger()
+	assert.NotEqual(t, log, log2)
+	assert.Equal(t, log1, log2)
+
+	reset()
+}
+
+func TestRaceLogger(t *testing.T) {
+	wg := sync.WaitGroup{}
+	for i := 0; i < 100; i++ {
+		wg.Add(3)
+		go func() {
+			defer wg.Done()
+			SetLogger(&mockLogger{})
+		}()
+		go func() {
+			defer wg.Done()
+			_ = GetLogger()
+		}()
+		go func() {
+			defer wg.Done()
+			config := Config{
+				Level: "degug",
+			}
+			_ = InitLogger(config)
+		}()
+	}
+	wg.Wait()
+	reset()
+}
+
+type mockLogger struct {
+}
+
+func (m mockLogger) Info(args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Warn(args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Error(args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Debug(args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Infof(fmt string, args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Warnf(fmt string, args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Errorf(fmt string, args ...interface{}) {
+	panic("implement me")
+}
+
+func (m mockLogger) Debugf(fmt string, args ...interface{}) {
+	panic("implement me")
+}
--- a/common/logger/logging.go
+++ b/common/logger/logging.go
@ -0,0 +1,57 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package logger
+
+// Info is info level
+func Info(args ...interface{}) {
+	GetLogger().Info(args...)
+}
+
+// Warn is warning level
+func Warn(args ...interface{}) {
+	GetLogger().Warn(args...)
+}
+
+// Error is error level
+func Error(args ...interface{}) {
+	GetLogger().Error(args...)
+}
+
+// Debug is debug level
+func Debug(args ...interface{}) {
+	GetLogger().Debug(args...)
+}
+
+// Infof is format info level
+func Infof(fmt string, args ...interface{}) {
+	GetLogger().Infof(fmt, args...)
+}
+
+// Warnf is format warning level
+func Warnf(fmt string, args ...interface{}) {
+	GetLogger().Warnf(fmt, args...)
+}
+
+// Errorf is format error level
+func Errorf(fmt string, args ...interface{}) {
+	GetLogger().Errorf(fmt, args...)
+}
+
+// Debugf is format debug level
+func Debugf(fmt string, args ...interface{}) {
+	GetLogger().Debugf(fmt, args...)
+}
--- a/common/monitor/monitor.go
+++ b/common/monitor/monitor.go
@ -0,0 +1,65 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package monitor
+
+import "github.com/prometheus/client_golang/prometheus"
+
+var (
+	gaugeMonitorVec = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "nacos_monitor",
+		Help: "nacos_monitor",
+	}, []string{"module", "name"})
+	histogramMonitorVec = prometheus.NewHistogramVec(prometheus.HistogramOpts{
+		Name: "nacos_client_request",
+		Help: "nacos_client_request",
+	}, []string{"module", "method", "url", "code"})
+)
+
+// register collectors vec
+func init() {
+	prometheus.MustRegister(gaugeMonitorVec, histogramMonitorVec)
+}
+
+// get gauge with labels and use gaugeMonitorVec
+func GetGaugeWithLabels(labels ...string) prometheus.Gauge {
+	return gaugeMonitorVec.WithLabelValues(labels...)
+}
+
+func GetServiceInfoMapSizeMonitor() prometheus.Gauge {
+	return GetGaugeWithLabels("serviceInfo", "serviceInfoMapSize")
+}
+
+func GetDom2BeatSizeMonitor() prometheus.Gauge {
+	return GetGaugeWithLabels("dom2Beat", "dom2BeatSize")
+}
+
+func GetListenConfigCountMonitor() prometheus.Gauge {
+	return GetGaugeWithLabels("listenConfig", "listenConfigCount")
+}
+
+// get histogram with labels and use histogramMonitorVec
+func GetHistogramWithLabels(labels ...string) prometheus.Observer {
+	return histogramMonitorVec.WithLabelValues(labels...)
+}
+
+func GetConfigRequestMonitor(method, url, code string) prometheus.Observer {
+	return GetHistogramWithLabels("config", method, url, code)
+}
+
+func GetNamingRequestMonitor(method, url, code string) prometheus.Observer {
+	return GetHistogramWithLabels("naming", method, url, code)
+}
--- a/common/monitor/monitor_test.go
+++ b/common/monitor/monitor_test.go
@ -0,0 +1,39 @@
+package monitor
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGaugeMonitor(t *testing.T) {
+	t.Run("getGaugeWithLabels", func(t *testing.T) {
+		// will panic because of wrong label count.
+		defer func() {
+			r := recover()
+			assert.NotNil(t, r)
+		}()
+		GetGaugeWithLabels("gauge", "test_gauge", "should_not_exist_label")
+	})
+
+	t.Run("serviceInfoMapMonitor", func(t *testing.T) {
+		monitor := GetServiceInfoMapSizeMonitor()
+		assert.NotNil(t, monitor)
+	})
+}
+
+func TestHistorgam(t *testing.T) {
+	t.Run("getHistogram", func(t *testing.T) {
+		// will panic because of wrong label count.
+		defer func() {
+			r := recover()
+			assert.NotNil(t, r)
+		}()
+		GetHistogramWithLabels("histogram", "test_histogram", "should_not_exist_label")
+	})
+
+	t.Run("serviceInfoMapMonitor", func(t *testing.T) {
+		monitor := GetConfigRequestMonitor("GET", "url", "NA")
+		assert.NotNil(t, monitor)
+	})
+}
--- a/common/nacos_error/nacos_error.go
+++ b/common/nacos_error/nacos_error.go
@ -1,18 +1,54 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package nacos_error

-/**
-*
-* @description :
-*
-* @author : codezhang
-*
-* @create : 2019-01-14 11:22
-**/
+import (
+	"fmt"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+)

 type NacosError struct {
-	ErrMsg string
+	errorCode   string
+	errMsg      string
+	originError error
+}
+
+func NewNacosError(errorCode string, errMsg string, originError error) *NacosError {
+	return &NacosError{
+		errorCode:   errorCode,
+		errMsg:      errMsg,
+		originError: originError,
+	}
+
 }

 func (err *NacosError) Error() (str string) {
-	return err.ErrMsg
+	nacosErrMsg := fmt.Sprintf("[%s] %s", err.ErrorCode(), err.errMsg)
+	if err.originError != nil {
+		return nacosErrMsg + "\ncaused by:\n" + err.originError.Error()
+	}
+	return nacosErrMsg
+}
+
+func (err *NacosError) ErrorCode() string {
+	if err.errorCode == "" {
+		return constant.DefaultClientErrorCode
+	} else {
+		return err.errorCode
+	}
 }
--- a/common/nacos_server/nacos_server.go
+++ b/common/nacos_server/nacos_server.go
@ -1,164 +1,365 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package nacos_server

 import (
-	"errors"
-	"fmt"
-	"github.com/nacos-group/nacos-sdk-go/common/constant"
-	"github.com/nacos-group/nacos-sdk-go/common/http_agent"
-	"github.com/nacos-group/nacos-sdk-go/utils"
-	"github.com/satori/go.uuid"
-	"io/ioutil"
-	"log"
+	"context"
+	"io"
 	"math/rand"
 	"net/http"
 	"reflect"
 	"strconv"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/monitor"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_error"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+	"github.com/nacos-group/nacos-sdk-go/v2/inner/uuid"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
 )

 type NacosServer struct {
 	sync.RWMutex
-	serverList          []constant.ServerConfig
-	httpAgent           http_agent.IHttpAgent
-	timeoutMs           uint64
-	endpoint            string
-	lastSrvRefTime      int64
-	vipSrvRefInterMills int64
+	securityLogin         security.SecurityProxy
+	serverList            []constant.ServerConfig
+	httpAgent             http_agent.IHttpAgent
+	timeoutMs             uint64
+	endpoint              string
+	lastSrvRefTime        int64
+	vipSrvRefInterMills   int64
+	contextPath           string
+	endpointContextPath   string
+	endpointQueryParams   string
+	endpointQueryHeader   map[string][]string
+	clusterName           string
+	currentIndex          int32
+	ServerSrcChangeSignal chan struct{}
 }

-func NewNacosServer(serverList []constant.ServerConfig, httpAgent http_agent.IHttpAgent, timeoutMs uint64, endpoint string) (NacosServer, error) {
-	if len(serverList) == 0 && endpoint == "" {
-		return NacosServer{}, errors.New("both serverlist  and  endpoint are empty")
+func NewNacosServer(ctx context.Context, serverList []constant.ServerConfig, clientCfg constant.ClientConfig, httpAgent http_agent.IHttpAgent, timeoutMs uint64, endpoint string, endpointQueryHeader map[string][]string) (*NacosServer, error) {
+	return NewNacosServerWithRamCredentialProvider(ctx, serverList, clientCfg, httpAgent, timeoutMs, endpoint, endpointQueryHeader, nil)
+}
+
+func NewNacosServerWithRamCredentialProvider(ctx context.Context, serverList []constant.ServerConfig, clientCfg constant.ClientConfig, httpAgent http_agent.IHttpAgent, timeoutMs uint64, endpoint string, endpointQueryHeader map[string][]string, provider security.RamCredentialProvider) (*NacosServer, error) {
+	severLen := len(serverList)
+	if severLen == 0 && endpoint == "" {
+		return &NacosServer{}, errors.New("both serverlist  and  endpoint are empty")
 	}
+
+	securityLogin := security.NewSecurityProxyWithRamCredentialProvider(clientCfg, serverList, httpAgent, provider)
+
 	ns := NacosServer{
-		serverList:          serverList,
-		httpAgent:           httpAgent,
-		timeoutMs:           timeoutMs,
-		endpoint:            endpoint,
-		vipSrvRefInterMills: 10000,
+		serverList:            serverList,
+		securityLogin:         securityLogin,
+		httpAgent:             httpAgent,
+		timeoutMs:             timeoutMs,
+		endpoint:              endpoint,
+		vipSrvRefInterMills:   10000,
+		endpointContextPath:   clientCfg.EndpointContextPath,
+		endpointQueryParams:   clientCfg.EndpointQueryParams,
+		endpointQueryHeader:   endpointQueryHeader,
+		clusterName:           clientCfg.ClusterName,
+		contextPath:           clientCfg.ContextPath,
+		ServerSrcChangeSignal: make(chan struct{}, 1),
 	}
-	ns.initRefreshSrvIfNeed()
-	return ns, nil
+	if severLen > 0 {
+		ns.currentIndex = rand.Int31n(int32(severLen))
+	} else {
+		ns.initRefreshSrvIfNeed(ctx)
+	}
+
+	ns.securityLogin.Login()
+	ns.securityLogin.AutoRefresh(ctx)
+	return &ns, nil
 }

-func (server *NacosServer) callServer(api string, params map[string]string, method string, curServer string, contextPath string) (result string, err error) {
+func (server *NacosServer) callConfigServer(api string, params map[string]string, newHeaders map[string]string,
+	method string, curServer string, contextPath string, timeoutMS uint64) (result string, err error) {
+	start := time.Now()
 	if contextPath == "" {
 		contextPath = constant.WEB_CONTEXT
 	}
-	url := "http://" + curServer + contextPath + api
+
+	url := curServer + contextPath + api
+
+	headers := map[string][]string{}
+	for k, v := range newHeaders {
+		if k != "accessKey" && k != "secretKey" {
+			headers[k] = []string{v}
+		}
+	}
+	headers["Client-Version"] = []string{constant.CLIENT_VERSION}
+	headers["User-Agent"] = []string{constant.CLIENT_VERSION}
+	//headers["Accept-Encoding"] = []string{"gzip,deflate,sdch"}
+	headers["Connection"] = []string{"Keep-Alive"}
+	headers["exConfigInfo"] = []string{"true"}
+	uid, err := uuid.NewV4()
+	if err != nil {
+		return
+	}
+	headers["RequestId"] = []string{uid.String()}
+	headers["Content-Type"] = []string{"application/x-www-form-urlencoded;charset=utf-8"}
+
+	var response *http.Response
+	response, err = server.httpAgent.Request(method, url, headers, timeoutMS, params)
+	monitor.GetConfigRequestMonitor(method, url, util.GetStatusCode(response)).Observe(float64(time.Now().Nanosecond() - start.Nanosecond()))
+	if err != nil {
+		return
+	}
+	var bytes []byte
+	bytes, err = io.ReadAll(response.Body)
+	defer response.Body.Close()
+	if err != nil {
+		return
+	}
+	result = string(bytes)
+	if response.StatusCode == constant.RESPONSE_CODE_SUCCESS {
+		return
+	} else {
+		err = nacos_error.NewNacosError(strconv.Itoa(response.StatusCode), string(bytes), nil)
+		return
+	}
+}
+
+func (server *NacosServer) callServer(api string, params map[string]string, method string, curServer string, contextPath string) (result string, err error) {
+	start := time.Now()
+	if contextPath == "" {
+		contextPath = constant.WEB_CONTEXT
+	}
+
+	url := curServer + contextPath + api
+
 	headers := map[string][]string{}
 	headers["Client-Version"] = []string{constant.CLIENT_VERSION}
 	headers["User-Agent"] = []string{constant.CLIENT_VERSION}
-	headers["Accept-Encoding"] = []string{"gzip,deflate,sdch"}
+	//headers["Accept-Encoding"] = []string{"gzip,deflate,sdch"}
 	headers["Connection"] = []string{"Keep-Alive"}
-	headers["RequestId"] = []string{uuid.NewV4().String()}
+	uid, err := uuid.NewV4()
+	if err != nil {
+		return
+	}
+	headers["RequestId"] = []string{uid.String()}
 	headers["Request-Module"] = []string{"Naming"}
-	headers["Content-Type"] = []string{"application/x-www-form-urlencoded"}
+	headers["Content-Type"] = []string{"application/x-www-form-urlencoded;charset=utf-8"}
+
 	var response *http.Response
 	response, err = server.httpAgent.Request(method, url, headers, server.timeoutMs, params)
 	if err != nil {
 		return
 	}
 	var bytes []byte
-	bytes, err = ioutil.ReadAll(response.Body)
+	bytes, err = io.ReadAll(response.Body)
 	defer response.Body.Close()
 	if err != nil {
 		return
 	}
 	result = string(bytes)
-	if response.StatusCode == 200 {
+	monitor.GetNamingRequestMonitor(method, api, util.GetStatusCode(response)).Observe(float64(time.Now().Nanosecond() - start.Nanosecond()))
+	if response.StatusCode == constant.RESPONSE_CODE_SUCCESS {
 		return
 	} else {
-		err = errors.New(fmt.Sprintf("request return error code %d", response.StatusCode))
+		err = errors.Errorf("request return error code %d", response.StatusCode)
 		return
 	}
 }

-func (server *NacosServer) ReqApi(api string, params map[string]string, method string) (string, error) {
+func (server *NacosServer) ReqConfigApi(api string, params map[string]string, headers map[string]string, method string, timeoutMS uint64) (string, error) {
 	srvs := server.serverList
 	if srvs == nil || len(srvs) == 0 {
 		return "", errors.New("server list is empty")
 	}
+
+	server.InjectSecurityInfo(params, security.BuildConfigResource(params["tenant"], params["group"], params["dataId"]))
+
 	//only one server,retry request when error
+	var err error
+	var result string
 	if len(srvs) == 1 {
 		for i := 0; i < constant.REQUEST_DOMAIN_RETRY_TIME; i++ {
-			result, err := server.callServer(api, params, method, getAddress(srvs[0]), srvs[0].ContextPath)
+			result, err = server.callConfigServer(api, params, headers, method, getAddress(srvs[0]), srvs[0].ContextPath, timeoutMS)
 			if err == nil {
 				return result, nil
 			}
-			log.Printf("[ERROR] api<%s>,method:<%s>, params:<%s>, call domain error:<%s> , result:<%s> \n", api, method, utils.ToJsonString(params), err.Error(), result)
+			logger.Errorf("api<%s>,method:<%s>, params:<%s>, call domain error:<%+v> , result:<%s>", api, method, util.ToJsonString(params), err, result)
 		}
-		return "", errors.New("retry " + strconv.Itoa(constant.REQUEST_DOMAIN_RETRY_TIME) + " times request failed!")
 	} else {
 		index := rand.Intn(len(srvs))
 		for i := 1; i <= len(srvs); i++ {
 			curServer := srvs[index]
-			result, err := server.callServer(api, params, method, getAddress(curServer), curServer.ContextPath)
+			result, err = server.callConfigServer(api, params, headers, method, getAddress(curServer), curServer.ContextPath, timeoutMS)
 			if err == nil {
 				return result, nil
 			}
-			log.Printf("[ERROR] api<%s>,method:<%s>, params:<%s>, call domain error:<%s> , result:<%s> \n", api, method, utils.ToJsonString(params), err.Error(), result)
+			logger.Errorf("[ERROR] api<%s>,method:<%s>, params:<%s>, call domain error:<%+v> , result:<%s> \n", api, method, util.ToJsonString(params), err, result)
 			index = (index + i) % len(srvs)
 		}
-		return "", errors.New("retry " + strconv.Itoa(constant.REQUEST_DOMAIN_RETRY_TIME) + " times request failed!")
 	}
+	return "", errors.Wrapf(err, "retry %d times request failed!", constant.REQUEST_DOMAIN_RETRY_TIME)
 }

-func (server *NacosServer) initRefreshSrvIfNeed() {
+func (server *NacosServer) ReqApi(api string, params map[string]string, method string, config constant.ClientConfig) (string, error) {
+	srvs := server.serverList
+	if srvs == nil || len(srvs) == 0 {
+		return "", errors.New("server list is empty")
+	}
+
+	server.InjectSecurityInfo(params, security.BuildNamingResource(params["namespaceId"], params["serviceName"], params["groupName"]))
+
+	//only one server,retry request when error
+	var err error
+	var result string
+	if len(srvs) == 1 {
+		for i := 0; i < constant.REQUEST_DOMAIN_RETRY_TIME; i++ {
+			result, err = server.callServer(api, params, method, getAddress(srvs[0]), srvs[0].ContextPath)
+			if err == nil {
+				return result, nil
+			}
+			logger.Errorf("api<%s>,method:<%s>, params:<%s>, call domain error:<%+v> , result:<%s>", api, method, util.ToJsonString(params), err, result)
+		}
+	} else {
+		index := rand.Intn(len(srvs))
+		for i := 1; i <= len(srvs); i++ {
+			curServer := srvs[index]
+			result, err = server.callServer(api, params, method, getAddress(curServer), curServer.ContextPath)
+			if err == nil {
+				return result, nil
+			}
+			logger.Errorf("api<%s>,method:<%s>, params:<%s>, call domain error:<%+v> , result:<%s>", api, method, util.ToJsonString(params), err, result)
+			index = (index + i) % len(srvs)
+		}
+	}
+	return "", errors.Wrapf(err, "retry %d times request failed!", constant.REQUEST_DOMAIN_RETRY_TIME)
+}
+
+func (server *NacosServer) initRefreshSrvIfNeed(ctx context.Context) {
 	if server.endpoint == "" {
 		return
 	}
-	server.refreshServerSrvIfNeed()
+
+	if len(strings.TrimSpace(server.endpointContextPath)) == 0 {
+		server.endpointContextPath = "nacos"
+	}
+
+	if len(strings.TrimSpace(server.clusterName)) == 0 {
+		server.clusterName = "serverlist"
+	}
+	urlString := "http://" + server.endpoint + "/" + strings.TrimSpace(server.endpointContextPath) + "/" + strings.TrimSpace(server.clusterName)
+	if len(strings.TrimSpace(server.endpointQueryParams)) != 0 {
+		urlString += "?" + server.endpointQueryParams
+	}
+	logger.Infof("nacos address server url: <%s>", urlString)
+
+	server.refreshServerSrvIfNeed(urlString, server.endpointQueryHeader)
 	go func() {
-		time.Sleep(time.Duration(1) * time.Second)
-		server.refreshServerSrvIfNeed()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			default:
+				time.Sleep(time.Duration(10) * time.Second)
+				server.refreshServerSrvIfNeed(urlString, server.endpointQueryHeader)
+			}
+		}
 	}()

 }

-func (server *NacosServer) refreshServerSrvIfNeed() {
-	if utils.CurrentMillis()-server.lastSrvRefTime < server.vipSrvRefInterMills && len(server.serverList) > 0 {
+func (server *NacosServer) refreshServerSrvIfNeed(urlString string, header map[string][]string) {
+	if util.CurrentMillis()-server.lastSrvRefTime < server.vipSrvRefInterMills && len(server.serverList) > 0 {
 		return
 	}

 	var list []string
-	urlString := "http://" + server.endpoint + "/nacos/serverlist"
-	result := server.httpAgent.RequestOnlyResult(http.MethodGet, urlString, nil, server.timeoutMs, nil)
+
+	result := server.httpAgent.RequestOnlyResult(http.MethodGet, urlString, header, server.timeoutMs, nil)
 	list = strings.Split(result, "\n")
-	log.Printf("[info] http nacos server list: <%s> \n", result)

 	var servers []constant.ServerConfig
+	contextPath := server.contextPath
+	if len(contextPath) == 0 {
+		contextPath = constant.WEB_CONTEXT
+	}
 	for _, line := range list {
 		if line != "" {
 			splitLine := strings.Split(strings.TrimSpace(line), ":")
-			port := 80
+			port := 8848
 			var err error
 			if len(splitLine) == 2 {
 				port, err = strconv.Atoi(splitLine[1])
 				if err != nil {
-					log.Printf("[ERROR] get port from server:<%s>  error: <%s> \n", line, err.Error())
+					logger.Errorf("get port from server:<%s>  error: <%+v>", line, err)
 					continue
 				}
 			}
-			servers = append(servers, constant.ServerConfig{IpAddr: splitLine[0], Port: uint64(port), ContextPath: constant.WEB_CONTEXT})
+
+			servers = append(servers, constant.ServerConfig{Scheme: constant.DEFAULT_SERVER_SCHEME, IpAddr: splitLine[0], Port: uint64(port), ContextPath: contextPath})
 		}
 	}
-
 	if len(servers) > 0 {
-		server.Lock()
 		if !reflect.DeepEqual(server.serverList, servers) {
-			log.Printf("[info] server list is updated, old: <%v>,new:<%v> \n", server.serverList, servers)
-		}
-		server.serverList = servers
-		server.lastSrvRefTime = utils.CurrentMillis()
-		server.Unlock()
-	}
+			server.Lock()
+			var serverPrev = server.serverList
+			logger.Infof("server list is updated, old: <%v>,new:<%v>", serverPrev, servers)

+			server.serverList = servers
+			if serverPrev != nil {
+				server.ServerSrcChangeSignal <- struct{}{}
+			}
+			server.lastSrvRefTime = util.CurrentMillis()
+			server.securityLogin.UpdateServerList(servers)
+			server.Unlock()
+		}
+
+	}
 	return
 }

-func getAddress(cfg constant.ServerConfig) string {
-	return cfg.IpAddr + ":" + strconv.Itoa(int(cfg.Port))
+func (server *NacosServer) GetServerList() []constant.ServerConfig {
+	return server.serverList
+}
+
+func (server *NacosServer) InjectSecurityInfo(param map[string]string, resource security.RequestResource) {
+	securityInfo := server.securityLogin.GetSecurityInfo(resource)
+	for k, v := range securityInfo {
+		param[k] = v
+	}
+}
+
+func getAddress(cfg constant.ServerConfig) string {
+	if strings.Index(cfg.IpAddr, "http://") >= 0 || strings.Index(cfg.IpAddr, "https://") >= 0 {
+		return cfg.IpAddr + ":" + strconv.Itoa(int(cfg.Port))
+	}
+	return cfg.Scheme + "://" + cfg.IpAddr + ":" + strconv.Itoa(int(cfg.Port))
+}
+
+func (server *NacosServer) GetNextServer() (constant.ServerConfig, error) {
+	serverLen := len(server.GetServerList())
+	if serverLen == 0 {
+		return constant.ServerConfig{}, errors.New("server is empty")
+	}
+	index := atomic.AddInt32(&server.currentIndex, 1) % int32(serverLen)
+	return server.GetServerList()[index], nil
 }
--- a/common/nacos_server/nacos_server_test.go
+++ b/common/nacos_server/nacos_server_test.go
@ -0,0 +1,187 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package nacos_server
+
+import (
+	"context"
+	"testing"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/http_agent"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/security"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_getAddressWithScheme(t *testing.T) {
+	var serverConfigTest = constant.ServerConfig{
+		ContextPath: "/nacos",
+		Port:        80,
+		IpAddr:      "console.nacos.io",
+		Scheme:      "https",
+	}
+	address := getAddress(serverConfigTest)
+	assert.Equal(t, "https://console.nacos.io:80", address)
+}
+
+func Test_getAddressWithoutScheme(t *testing.T) {
+	serverConfigTest := constant.ServerConfig{
+		ContextPath: "/nacos",
+		Port:        80,
+		IpAddr:      "http://console.nacos.io",
+	}
+	assert.Equal(t, "http://console.nacos.io:80", getAddress(serverConfigTest))
+
+	serverConfigTest.IpAddr = "https://console.nacos.io"
+	assert.Equal(t, "https://console.nacos.io:80", getAddress(serverConfigTest))
+
+}
+
+func buildNacosServer(clientConfig constant.ClientConfig) (*NacosServer, error) {
+	return NewNacosServer(context.Background(),
+		[]constant.ServerConfig{*constant.NewServerConfig("http://console.nacos.io", 80)},
+		clientConfig,
+		&http_agent.HttpAgent{},
+		1000,
+		"",
+		nil)
+}
+
+func TestNacosServer_InjectSignForNamingHttp_NoAk(t *testing.T) {
+	clientConfig := constant.ClientConfig{
+		AccessKey: "",
+		SecretKey: "",
+	}
+	server, err := buildNacosServer(clientConfig)
+	if err != nil {
+		t.FailNow()
+	}
+
+	param := make(map[string]string, 4)
+	param["serviceName"] = "s-0"
+	param["groupName"] = "g-0"
+	server.InjectSecurityInfo(param, security.BuildNamingResource(param["namespaceId"], param["groupName"], param["serviceName"]))
+	assert.Empty(t, param["ak"])
+	assert.Empty(t, param["data"])
+	assert.Empty(t, param["signature"])
+}
+
+func TestNacosServer_InjectSignForNamingHttp_WithGroup(t *testing.T) {
+	clientConfig := constant.ClientConfig{
+		AccessKey: "123",
+		SecretKey: "321",
+	}
+	server, err := buildNacosServer(clientConfig)
+	if err != nil {
+		t.FailNow()
+	}
+
+	param := make(map[string]string, 4)
+	param["serviceName"] = "s-0"
+	param["groupName"] = "g-0"
+	server.InjectSecurityInfo(param, security.BuildNamingResource(param["namespaceId"], param["groupName"], param["serviceName"]))
+	assert.Equal(t, "123", param["ak"])
+	assert.Contains(t, param["data"], "@@g-0@@s-0")
+	_, has := param["signature"]
+	assert.True(t, has)
+}
+
+func TestNacosServer_InjectSignForNamingHttp_WithoutGroup(t *testing.T) {
+	clientConfig := constant.ClientConfig{
+		AccessKey: "123",
+		SecretKey: "321",
+	}
+	server, err := buildNacosServer(clientConfig)
+	if err != nil {
+		t.FailNow()
+	}
+
+	param := make(map[string]string, 4)
+	param["serviceName"] = "s-0"
+	server.InjectSecurityInfo(param, security.BuildNamingResource(param["namespaceId"], param["groupName"], param["serviceName"]))
+	assert.Equal(t, "123", param["ak"])
+	assert.NotContains(t, param["data"], "@@g-0@@s-0")
+	assert.Contains(t, param["data"], "@@s-0")
+	_, has := param["signature"]
+	assert.True(t, has)
+}
+
+func TestNacosServer_InjectSignForNamingHttp_WithoutServiceName(t *testing.T) {
+	clientConfig := constant.ClientConfig{
+		AccessKey: "123",
+		SecretKey: "321",
+	}
+	server, err := buildNacosServer(clientConfig)
+	if err != nil {
+		t.FailNow()
+	}
+
+	param := make(map[string]string, 4)
+	param["groupName"] = "g-0"
+	server.InjectSecurityInfo(param, security.BuildNamingResource(param["namespaceId"], param["groupName"], param["serviceName"]))
+	assert.Equal(t, "123", param["ak"])
+	assert.Contains(t, param["data"], "@@")
+	assert.Regexp(t, "\\d+", param["data"])
+	_, has := param["signature"]
+	assert.True(t, has)
+}
+
+func TestNacosServer_InjectSignForNamingHttp_WithoutServiceNameAndGroup(t *testing.T) {
+	clientConfig := constant.ClientConfig{
+		AccessKey: "123",
+		SecretKey: "321",
+	}
+	server, err := buildNacosServer(clientConfig)
+	if err != nil {
+		t.FailNow()
+	}
+
+	param := make(map[string]string, 4)
+	server.InjectSecurityInfo(param, security.BuildNamingResource(param["namespaceId"], param["serviceName"], param["groupName"]))
+	assert.Equal(t, "123", param["ak"])
+	assert.NotContains(t, param["data"], "@@")
+	assert.Regexp(t, "\\d+", param["data"])
+	_, has := param["signature"]
+	assert.True(t, has)
+}
+
+func TestNacosServer_UpdateServerListForSecurityLogin(t *testing.T) {
+	endpoint := "console.nacos.io:80"
+	clientConfig := constant.ClientConfig{
+		Username:            "nacos",
+		Password:            "nacos",
+		NamespaceId:         "namespace_1",
+		Endpoint:            endpoint,
+		EndpointContextPath: "nacos",
+		ClusterName:         "serverlist",
+		AppendToStdout:      true,
+	}
+	server, err := NewNacosServer(context.Background(),
+		nil,
+		clientConfig,
+		&http_agent.HttpAgent{},
+		1000,
+		endpoint,
+		nil)
+	if err != nil {
+		t.FailNow()
+	}
+	nacosAuthClient := server.securityLogin.Clients[0]
+	client, ok := nacosAuthClient.(*security.NacosAuthClient)
+	assert.True(t, ok)
+	assert.Equal(t, server.GetServerList(), client.GetServerList())
+}
--- a/common/remote/rpc/connection.go
+++ b/common/remote/rpc/connection.go
@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rpc
+
+import (
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"google.golang.org/grpc"
+)
+
+type IConnection interface {
+	request(request rpc_request.IRequest, timeoutMills int64, client *RpcClient) (rpc_response.IResponse, error)
+	close()
+	getConnectionId() string
+	getServerInfo() ServerInfo
+	setAbandon(flag bool)
+	getAbandon() bool
+}
+
+type Connection struct {
+	conn         *grpc.ClientConn
+	connectionId string
+	abandon      bool
+	serverInfo   ServerInfo
+}
+
+func (c *Connection) getConnectionId() string {
+	return c.connectionId
+}
+
+func (c *Connection) getServerInfo() ServerInfo {
+	return c.serverInfo
+}
+
+func (c *Connection) setAbandon(flag bool) {
+	c.abandon = flag
+}
+
+func (c *Connection) getAbandon() bool {
+	return c.abandon
+}
+
+func (c *Connection) close() {
+	_ = c.conn.Close()
+}
--- a/common/remote/rpc/connection_event_listener.go
+++ b/common/remote/rpc/connection_event_listener.go
@ -0,0 +1,26 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rpc
+
+type IConnectionEventListener interface {
+
+	//notify when  connected to server.
+	OnConnected()
+
+	//notify when  disconnected to server.
+	OnDisConnect()
+}
--- a/common/remote/rpc/connection_test.go
+++ b/common/remote/rpc/connection_test.go
@ -0,0 +1,25 @@
+package rpc
+
+import (
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+)
+
+type MockConnection struct {
+}
+
+func (m *MockConnection) request(request rpc_request.IRequest, timeoutMills int64, client *RpcClient) (rpc_response.IResponse, error) {
+	return nil, nil
+}
+func (m *MockConnection) close() {
+
+}
+func (m *MockConnection) getConnectionId() string {
+	return ""
+}
+func (m *MockConnection) getServerInfo() ServerInfo {
+	return ServerInfo{}
+}
+func (m *MockConnection) setAbandon(flag bool) {
+
+}
--- a/common/remote/rpc/grpc_client.go
+++ b/common/remote/rpc/grpc_client.go
@ -0,0 +1,352 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rpc
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"fmt"
+	"google.golang.org/grpc/credentials"
+	"io"
+	"log"
+	"os"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+
+	nacos_grpc_service "github.com/nacos-group/nacos-sdk-go/v2/api/grpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/nacos_server"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/keepalive"
+)
+
+type GrpcClient struct {
+	*RpcClient
+	*constant.TLSConfig
+}
+
+func NewGrpcClient(ctx context.Context, clientName string, nacosServer *nacos_server.NacosServer, tlsConfig *constant.TLSConfig) *GrpcClient {
+	rpcClient := &GrpcClient{
+		&RpcClient{
+			ctx:              ctx,
+			name:             clientName,
+			labels:           make(map[string]string, 8),
+			rpcClientStatus:  INITIALIZED,
+			eventChan:        make(chan ConnectionEvent, 1),
+			reconnectionChan: make(chan ReconnectContext, 1),
+			nacosServer:      nacosServer,
+			mux:              new(sync.Mutex),
+		}, tlsConfig,
+	}
+	rpcClient.RpcClient.lastActiveTimestamp.Store(time.Now())
+	rpcClient.executeClient = rpcClient
+	listeners := make([]IConnectionEventListener, 0, 8)
+	rpcClient.connectionEventListeners.Store(listeners)
+	return rpcClient
+}
+
+func getMaxCallRecvMsgSize() int {
+	maxCallRecvMsgSizeInt, err := strconv.Atoi(os.Getenv("nacos.remote.client.grpc.maxinbound.message.size"))
+	if err != nil {
+		return 10 * 1024 * 1024
+	}
+	return maxCallRecvMsgSizeInt
+}
+
+func getInitialWindowSize() int32 {
+	initialWindowSize, err := strconv.Atoi(os.Getenv("nacos.remote.client.grpc.initial.window.size"))
+	if err != nil {
+		return 10 * 1024 * 1024
+	}
+	return int32(initialWindowSize)
+}
+
+func getInitialConnWindowSize() int32 {
+	initialConnWindowSize, err := strconv.Atoi(os.Getenv("nacos.remote.client.grpc.initial.conn.window.size"))
+	if err != nil {
+		return 10 * 1024 * 1024
+	}
+	return int32(initialConnWindowSize)
+}
+
+func getTLSCredentials(tlsConfig *constant.TLSConfig, serverInfo ServerInfo) credentials.TransportCredentials {
+
+	logger.Infof("build tls config for connecting to server %s,tlsConfig = %s", serverInfo.serverIp, tlsConfig)
+
+	certPool, err := x509.SystemCertPool()
+	if err != nil {
+		log.Fatalf("load root cert pool fail : %v", err)
+	}
+	if len(tlsConfig.CaFile) != 0 {
+		cert, err := os.ReadFile(tlsConfig.CaFile)
+		if err != nil {
+			fmt.Errorf("err, %v", err)
+		}
+		if ok := certPool.AppendCertsFromPEM(cert); !ok {
+			fmt.Errorf("failed to append ca certs")
+		}
+	}
+
+	config := tls.Config{
+		InsecureSkipVerify: tlsConfig.TrustAll,
+		RootCAs:            certPool,
+		Certificates:       []tls.Certificate{},
+	}
+	if len(tlsConfig.CertFile) != 0 && len(tlsConfig.KeyFile) != 0 {
+		cert, err := tls.LoadX509KeyPair(tlsConfig.CertFile, tlsConfig.KeyFile)
+
+		if err != nil {
+			log.Fatalf("load cert fail : %v", err)
+		}
+		config.Certificates = append(config.Certificates, cert)
+	}
+	credentials := credentials.NewTLS(&config)
+	return credentials
+}
+
+func getInitialGrpcTimeout() int32 {
+	initialGrpcTimeout, err := strconv.Atoi(os.Getenv("nacos.remote.client.grpc.timeout"))
+	if err != nil {
+		return constant.DEFAULT_TIMEOUT_MILLS
+	}
+	return int32(initialGrpcTimeout)
+}
+
+func getKeepAliveTimeMillis() keepalive.ClientParameters {
+	keepAliveTimeMillisInt, err := strconv.Atoi(os.Getenv("nacos.remote.grpc.keep.alive.millis"))
+	var keepAliveTime time.Duration
+	if err != nil {
+		keepAliveTime = 60 * 1000 * time.Millisecond
+	} else {
+		keepAliveTime = time.Duration(keepAliveTimeMillisInt) * time.Millisecond
+	}
+	return keepalive.ClientParameters{
+		Time:                keepAliveTime,    // send pings every 60 seconds if there is no activity
+		Timeout:             20 * time.Second, // wait 20 second for ping ack before considering the connection dead
+		PermitWithoutStream: true,             // send pings even without active streams
+	}
+}
+
+func (c *GrpcClient) createNewConnection(serverInfo ServerInfo) (*grpc.ClientConn, error) {
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(getMaxCallRecvMsgSize())))
+	opts = append(opts, grpc.WithKeepaliveParams(getKeepAliveTimeMillis()))
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithInitialWindowSize(getInitialWindowSize()))
+	opts = append(opts, grpc.WithInitialConnWindowSize(getInitialConnWindowSize()))
+	c.getEnvTLSConfig(c.TLSConfig)
+	if c.TLSConfig.Enable {
+		logger.Infof(" tls enable ,trying to connection to server %s with tls config %s", serverInfo.serverIp, c.TLSConfig)
+		opts = append(opts, grpc.WithTransportCredentials(getTLSCredentials(c.TLSConfig, serverInfo)))
+	}
+	rpcPort := serverInfo.serverGrpcPort
+	if rpcPort == 0 {
+		rpcPort = serverInfo.serverPort + c.rpcPortOffset()
+	}
+	return grpc.Dial(serverInfo.serverIp+":"+strconv.FormatUint(rpcPort, 10), opts...)
+
+}
+
+func (c *GrpcClient) getEnvTLSConfig(config *constant.TLSConfig) {
+	logger.Infof("check tls config ", config)
+
+	if config.Appointed == true {
+		return
+	}
+	logger.Infof("try to get tls config from env")
+
+	enableTls, err := strconv.ParseBool(os.Getenv("nacos_remote_client_rpc_tls_enable"))
+	if err == nil {
+		config.Enable = enableTls
+		logger.Infof("get tls config from env ，key = enableTls value = %s", enableTls)
+	}
+
+	if enableTls != true {
+		logger.Infof(" tls config from env is not enable")
+		return
+	}
+	trustAll, err := strconv.ParseBool(os.Getenv("nacos_remote_client_rpc_tls_trustAll"))
+	if err == nil {
+		config.TrustAll = trustAll
+		logger.Infof("get tls config from env ，key = trustAll value = %s", trustAll)
+	}
+
+	config.CaFile = os.Getenv("nacos_remote_client_rpc_tls_trustCollectionChainPath")
+	logger.Infof("get tls config from env ，key = trustCollectionChainPath value = %s", config.CaFile)
+	config.CertFile = os.Getenv("nacos_remote_client_rpc_tls_certChainFile")
+	logger.Infof("get tls config from env ，key = certChainFile value = %s", config.CertFile)
+	config.KeyFile = os.Getenv("nacos_remote_client_rpc_tls_certPrivateKey")
+	logger.Infof("get tls config from env ，key = certPrivateKey value = %s", config.KeyFile)
+
+}
+
+func (c *GrpcClient) connectToServer(serverInfo ServerInfo) (IConnection, error) {
+	var client nacos_grpc_service.RequestClient
+	var biStreamClient nacos_grpc_service.BiRequestStreamClient
+
+	conn, err := c.createNewConnection(serverInfo)
+	if err != nil {
+		return nil, errors.Errorf("grpc create new connection failed , err:%v", err)
+	}
+
+	client = nacos_grpc_service.NewRequestClient(conn)
+	response, err := serverCheck(client)
+	if err != nil {
+		_ = conn.Close()
+		return nil, errors.Errorf("server check request failed , err:%v", err)
+	}
+	serverCheckResponse := response.(*rpc_response.ServerCheckResponse)
+
+	biStreamClient = nacos_grpc_service.NewBiRequestStreamClient(conn)
+	biStreamRequestClient, err := biStreamClient.RequestBiStream(context.Background())
+	if err != nil {
+		return nil, errors.Errorf("create biStreamRequestClient failed , err:%v", err)
+	}
+	grpcConn := NewGrpcConnection(serverInfo, serverCheckResponse.ConnectionId, conn, client, biStreamRequestClient)
+	c.bindBiRequestStream(biStreamRequestClient, grpcConn)
+	err = c.sendConnectionSetupRequest(grpcConn)
+	return grpcConn, err
+}
+
+func (c *GrpcClient) sendConnectionSetupRequest(grpcConn *GrpcConnection) error {
+	csr := rpc_request.NewConnectionSetupRequest()
+	csr.ClientVersion = constant.CLIENT_VERSION
+	csr.Tenant = c.Tenant
+	csr.Labels = c.labels
+	csr.ClientAbilities = c.clientAbilities
+	err := grpcConn.biStreamSend(convertRequest(csr))
+	if err != nil {
+		logger.Warnf("send connectionSetupRequest error:%v", err)
+	}
+	time.Sleep(100 * time.Millisecond)
+	return err
+}
+
+func (c *GrpcClient) getConnectionType() ConnectionType {
+	return GRPC
+}
+
+func (c *GrpcClient) rpcPortOffset() uint64 {
+	return constant.RpcPortOffset
+}
+
+func (c *GrpcClient) bindBiRequestStream(streamClient nacos_grpc_service.BiRequestStream_RequestBiStreamClient, grpcConn *GrpcConnection) {
+	go func() {
+		for {
+			select {
+			case <-streamClient.Context().Done():
+				logger.Warnf("connectionId %s stream client close", grpcConn.getConnectionId())
+				return
+			default:
+				payload, err := streamClient.Recv()
+				if err != nil {
+					running := c.IsRunning()
+					abandon := grpcConn.getAbandon()
+					if c.IsRunning() && !abandon {
+						if err == io.EOF {
+							logger.Infof("connectionId %s request stream onCompleted, switch server", grpcConn.getConnectionId())
+						} else {
+							logger.Errorf("connectionId %s request stream error, switch server, error=%v", grpcConn.getConnectionId(), err)
+						}
+						if atomic.CompareAndSwapInt32((*int32)(&c.rpcClientStatus), int32(RUNNING), int32(UNHEALTHY)) {
+							c.switchServerAsync(ServerInfo{}, false)
+							return
+						}
+					} else {
+						logger.Errorf("connectionId %s received error event, isRunning:%v, isAbandon=%v, error=%v", grpcConn.getConnectionId(), running, abandon, err)
+						return
+					}
+				} else {
+					c.handleServerRequest(payload, grpcConn)
+				}
+			}
+		}
+	}()
+}
+
+func serverCheck(client nacos_grpc_service.RequestClient) (rpc_response.IResponse, error) {
+	var response rpc_response.ServerCheckResponse
+	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(getInitialGrpcTimeout())*time.Millisecond)
+	defer cancel()
+	for i := 0; i <= 30; i++ {
+		payload, err := client.Request(ctx, convertRequest(rpc_request.NewServerCheckRequest()))
+		if err != nil {
+			return nil, err
+		}
+		err = json.Unmarshal(payload.GetBody().Value, &response)
+		if err != nil {
+			return nil, err
+		}
+		// check if the server is ready, if not, wait 1 second and try again
+		if response.GetErrorCode() >= 300 && response.GetErrorCode() < 400 {
+			// if we wait 30 second, but the server is not ready,then throw this error
+			if i == 30 {
+				return nil, errors.New("the nacos server is not ready to work in 30 seconds, connect to server failed")
+			}
+			time.Sleep(1 * time.Second)
+			continue
+		}
+		break
+	}
+	return &response, nil
+}
+
+func (c *GrpcClient) handleServerRequest(p *nacos_grpc_service.Payload, grpcConn *GrpcConnection) {
+	client := c.GetRpcClient()
+	payLoadType := p.GetMetadata().GetType()
+
+	handlerMapping, ok := client.serverRequestHandlerMapping.Load(payLoadType)
+	if !ok {
+		logger.Errorf("%s Unsupported payload type", grpcConn.getConnectionId())
+		return
+	}
+
+	mapping := handlerMapping.(ServerRequestHandlerMapping)
+
+	serverRequest := mapping.serverRequest()
+	err := json.Unmarshal(p.GetBody().Value, serverRequest)
+	if err != nil {
+		logger.Errorf("%s Fail to json Unmarshal for request:%s, ackId->%s", grpcConn.getConnectionId(),
+			serverRequest.GetRequestType(), serverRequest.GetRequestId())
+		return
+	}
+
+	serverRequest.PutAllHeaders(p.GetMetadata().Headers)
+
+	response := mapping.handler.RequestReply(serverRequest, client)
+	if response == nil {
+		logger.Warnf("%s Fail to process server request, ackId->%s", grpcConn.getConnectionId(),
+			serverRequest.GetRequestId())
+		return
+	}
+	response.SetRequestId(serverRequest.GetRequestId())
+	err = grpcConn.biStreamSend(convertResponse(response))
+	if err != nil && err != io.EOF {
+		logger.Warnf("%s Fail to send response:%s,ackId->%s", grpcConn.getConnectionId(),
+			response.GetResponseType(), serverRequest.GetRequestId())
+	}
+}
--- a/common/remote/rpc/grpc_connection.go
+++ b/common/remote/rpc/grpc_connection.go
@ -0,0 +1,103 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rpc
+
+import (
+	"context"
+	"time"
+
+	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
+
+	nacos_grpc_service "github.com/nacos-group/nacos-sdk-go/v2/api/grpc"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_request"
+	"github.com/nacos-group/nacos-sdk-go/v2/common/remote/rpc/rpc_response"
+	"github.com/nacos-group/nacos-sdk-go/v2/util"
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/types/known/anypb"
+
+	"google.golang.org/grpc"
+)
+
+type GrpcConnection struct {
+	*Connection
+	client         nacos_grpc_service.RequestClient
+	biStreamClient nacos_grpc_service.BiRequestStream_RequestBiStreamClient
+}
+
+func NewGrpcConnection(serverInfo ServerInfo, connectionId string, conn *grpc.ClientConn,
+	client nacos_grpc_service.RequestClient, biStreamClient nacos_grpc_service.BiRequestStream_RequestBiStreamClient) *GrpcConnection {
+	return &GrpcConnection{
+		Connection: &Connection{
+			serverInfo:   serverInfo,
+			connectionId: connectionId,
+			abandon:      false,
+			conn:         conn,
+		},
+		client:         client,
+		biStreamClient: biStreamClient,
+	}
+}
+func (g *GrpcConnection) request(request rpc_request.IRequest, timeoutMills int64, client *RpcClient) (rpc_response.IResponse, error) {
+	p := convertRequest(request)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(timeoutMills)*time.Millisecond)
+	defer cancel()
+	responsePayload, err := g.client.Request(ctx, p)
+	if err != nil {
+		logger.Debugf("%s grpc request nacos server failed, request=%+v, err=%v ", g.getConnectionId(), p, err)
+		return nil, err
+	}
+
+	responseFunc, ok := rpc_response.ClientResponseMapping[responsePayload.Metadata.GetType()]
+	if !ok {
+		return nil, errors.Errorf("request:%s,unsupported response type:%s", request.GetRequestType(),
+			responsePayload.Metadata.GetType())
+	}
+
+	logger.Debugf("%s grpc request nacos server success, request=%+v, response=%s", g.getConnectionId(), p, string(responsePayload.GetBody().Value))
+	return rpc_response.InnerResponseJsonUnmarshal(responsePayload.GetBody().Value, responseFunc)
+}
+
+func (g *GrpcConnection) close() {
+	g.Connection.close()
+}
+
+func (g *GrpcConnection) biStreamSend(payload *nacos_grpc_service.Payload) error {
+	return g.biStreamClient.Send(payload)
+}
+
+func convertRequest(r rpc_request.IRequest) *nacos_grpc_service.Payload {
+	Metadata := nacos_grpc_service.Metadata{
+		Type:     r.GetRequestType(),
+		Headers:  r.GetHeaders(),
+		ClientIp: util.LocalIP(),
+	}
+	return &nacos_grpc_service.Payload{
+		Metadata: &Metadata,
+		Body:     &anypb.Any{Value: []byte(r.GetBody(r))},
+	}
+}
+
+func convertResponse(r rpc_response.IResponse) *nacos_grpc_service.Payload {
+	Metadata := nacos_grpc_service.Metadata{
+		Type:     r.GetResponseType(),
+		ClientIp: util.LocalIP(),
+	}
+	return &nacos_grpc_service.Payload{
+		Metadata: &Metadata,
+		Body:     &anypb.Any{Value: []byte(r.GetBody())},
+	}
+}
--- a/Show More
+++ b/Show More