diff --git a/docs/end-user/addons/observability.md b/docs/end-user/addons/observability.md
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index 00000000..f6b6ef2a
--- /dev/null
+++ b/docs/end-user/addons/observability.md
@@ -0,0 +1,5 @@
+---
+title: Observability
+---
+
+Working in progress.
\ No newline at end of file
diff --git a/i18n/zh/docusaurus-plugin-content-docs/current.json b/i18n/zh/docusaurus-plugin-content-docs/current.json
index dab759d8..6609eaa2 100644
--- a/i18n/zh/docusaurus-plugin-content-docs/current.json
+++ b/i18n/zh/docusaurus-plugin-content-docs/current.json
@@ -150,5 +150,9 @@
   "sidebar.docs.category.Cloud Services": {
     "message": "云服务",
     "description": "The label for category Cloud Services in sidebar docs"
+  },
+  "sidebar.docs.category.Addons": {
+    "message": "插件系统",
+    "description": "The extended add-ons"
   }
 }
\ No newline at end of file
diff --git a/i18n/zh/docusaurus-plugin-content-docs/current/end-user/addons/observability.md b/i18n/zh/docusaurus-plugin-content-docs/current/end-user/addons/observability.md
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@@ -0,0 +1,121 @@
+---
+title: 可观测性 Observability
+---
+
+可观测性插件（Observability addon）基于 metrics、logging、tracing 数据，可以为 KubeVela core 提供系统级别的监控，也可以为应用提供业务级别的监控。
+
+下面详细介绍可观测能力，以及如何启用可观测性插件，并查看各种监控数据。
+
+## 可观测能力介绍
+
+KubeVela 可观测能力是通过 [Grafana](https://grafana.com/) 展示的，提供系统级别和应用级别的数据监控。
+
+### 第一种用法：KubeVela Core 系统级别可观测性
+
+- KubeVela Core 资源使用情况监控
+
+1）CPU、内存等使用量和使用率数据
+
+![](../../resources/observability-system-level-summary-of-source-usages.png)
+
+2）CPU、内存随着时间变化（如过去三小时）的使用量和使用率、已经每秒网络带宽的图形化展示
+
+![](../../resources/observability-system-level-summary-of-source-usages-chart.png)
+
+- 第二种用法：KubeVela Core 日志监控
+
+1）日志统计
+
+可观测页面会显示KubeVela Core 日志总量，已经默认情况下，`error` 出现的数量、频率、出现的所有日志概览和详情。
+
+![](../../resources/observability-system-level-logging-statistics.png)
+
+还会展示随着时间变化，`error` 日志出现的总量、频率等。
+
+![](../../resources/observability-system-level-logging-statistics2.png)
+
+2）日志过滤
+
+在最上方填写关键词，还可以过滤日志。
+
+![](../../resources/observability-system-level-logging-search.png)
+
+## 安装插件
+
+可观测性插件是通过 `vela addon` 命令安装的。因为本插件依赖了 Prometheus，Prometheus 依赖 StorageClass，
+不同 Kubernetes 发行版，StorageClass 会有一定的差异，所以，在不同的 Kubernetes 发行版， 安装命令也有一些差异。
+
+### 自建/常规集群
+
+执行如下命令安装可观测性插件，KinD 等测试集群的安装步骤同理。
+
+```shell
+$ vela addon enable observability alertmanager-pvc-enabled=false server-pvc-enabled=false grafana-domain=example.com
+```
+
+### 云服务商提供的 Kubernetes 集群
+
+以阿里云 ACK 为例介绍。
+
+```shell
+$ vela addon enable observability alertmanager-pvc-class=alicloud-disk-available alertmanager-pvc-size=20Gi server-pvc-class=alicloud-disk-available server-pvc-size=20Gi grafana-domain=grafana.c276f4dac730c47b8b8988905e3c68fcf.cn-hongkong.alicontainer.com
+```
+
+其中，各个参数含义如下：
+
+- alertmanager-pvc-class
+
+Prometheus alert manager 需要的 pvc 的类型，也就是 StorageClass，在阿里云上，可选的 StorageClass 有：
+
+```shell
+$ kubectl get storageclass
+NAME                       PROVISIONER     RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
+alicloud-disk-available    alicloud/disk   Delete          Immediate           true                   6d
+alicloud-disk-efficiency   alicloud/disk   Delete          Immediate           true                   6d
+alicloud-disk-essd         alicloud/disk   Delete          Immediate           true                   6d
+alicloud-disk-ssd          alicloud/disk   Delete          Immediate           true                   6d
+```
+
+此处取值 `alicloud-disk-available`。
+
+- alertmanager-pvc-size
+
+Prometheus alert manager 需要的 pvc 的大小，在阿里云上，最小的 PV 是 20GB，所以，此处取值 20Gi。
+
+- server-pvc-class
+
+Prometheus server 需要的 pvc 的类型，同 `alertmanager-pvc-class`。
+
+- server-pvc-size
+
+Prometheus server 需要的 pvc 的大小，同 `alertmanager-pvc-size`。
+
+- grafana-domain
+
+Grafana 的域名，可以使用您自定义的域名，也可以使用 ACK 提供的集群级别的泛域名，`*.c276f4dac730c47b8b8988905e3c68fcf.cn-hongkong.alicontainer.com`，
+如本处取值 `grafana.c276f4dac730c47b8b8988905e3c68fcf.cn-hongkong.alicontainer.com`。
+
+对于其他云服务商提供的，请参考上面示例配置。
+
+## 查看监控数据
+
+### 自建/常规集群
+
+```shell
+$ kubectl get svc grafana -n observability
+NAME      TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
+grafana   ClusterIP   192.168.42.243   <none>        80/TCP    177m
+
+$ sudo k port-forward service/grafana -n observability 80:80
+Password:
+Forwarding from 127.0.0.1:80 -> 3000
+Forwarding from [::1]:80 -> 3000
+```
+
+通过浏览器访问 [http://127.0.0.1/dashboards](http://127.0.0.1/dashboards)，点击相应的 Dashboard ，查看前面介绍的各种监控数据。
+
+![](../../resources/observability-system-level-dashboards.png)
+
+### 云服务商提供的 Kubernetes 集群
+
+直接访问上面设置的 grafana domain，如 [http://grafana.c276f4dac730c47b8b8988905e3c68fcf.cn-hongkong.alicontainer.com/](http://grafana.c276f4dac730c47b8b8988905e3c68fcf.cn-hongkong.alicontainer.com/) ，查看前面介绍的各种监控数据。
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diff --git a/sidebars.js b/sidebars.js
index 69d154f6..807079d8 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -78,7 +78,12 @@ module.exports = {
         },
         {
           'Policies': [
-              'end-user/policies/envbinding'
+              'end-user/policies/envbinding',
+          ]
+        },
+        {
+          'Addons': [
+            'end-user/addons/observability',
           ]
         },
         {