438 lines
13 KiB
Go
438 lines
13 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dynamic
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import (
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"context"
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"fmt"
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"net/http"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/client-go/rest"
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)
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type DynamicClient struct {
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client rest.Interface
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}
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var _ Interface = &DynamicClient{}
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// ConfigFor returns a copy of the provided config with the
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// appropriate dynamic client defaults set.
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func ConfigFor(inConfig *rest.Config) *rest.Config {
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config := rest.CopyConfig(inConfig)
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config.AcceptContentTypes = "application/json"
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config.ContentType = "application/json"
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config.NegotiatedSerializer = basicNegotiatedSerializer{} // this gets used for discovery and error handling types
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if config.UserAgent == "" {
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config.UserAgent = rest.DefaultKubernetesUserAgent()
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}
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return config
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}
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// New creates a new DynamicClient for the given RESTClient.
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func New(c rest.Interface) *DynamicClient {
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return &DynamicClient{client: c}
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}
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// NewForConfigOrDie creates a new DynamicClient for the given config and
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// panics if there is an error in the config.
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func NewForConfigOrDie(c *rest.Config) *DynamicClient {
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ret, err := NewForConfig(c)
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if err != nil {
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panic(err)
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}
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return ret
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}
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// NewForConfig creates a new dynamic client or returns an error.
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// NewForConfig is equivalent to NewForConfigAndClient(c, httpClient),
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// where httpClient was generated with rest.HTTPClientFor(c).
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func NewForConfig(inConfig *rest.Config) (*DynamicClient, error) {
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config := ConfigFor(inConfig)
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httpClient, err := rest.HTTPClientFor(config)
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if err != nil {
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return nil, err
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}
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return NewForConfigAndClient(config, httpClient)
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}
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// NewForConfigAndClient creates a new dynamic client for the given config and http client.
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// Note the http client provided takes precedence over the configured transport values.
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func NewForConfigAndClient(inConfig *rest.Config, h *http.Client) (*DynamicClient, error) {
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config := ConfigFor(inConfig)
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// for serializing the options
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config.GroupVersion = &schema.GroupVersion{}
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config.APIPath = "/if-you-see-this-search-for-the-break"
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restClient, err := rest.RESTClientForConfigAndClient(config, h)
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if err != nil {
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return nil, err
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}
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return &DynamicClient{client: restClient}, nil
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}
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type dynamicResourceClient struct {
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client *DynamicClient
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namespace string
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resource schema.GroupVersionResource
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}
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func (c *DynamicClient) Resource(resource schema.GroupVersionResource) NamespaceableResourceInterface {
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return &dynamicResourceClient{client: c, resource: resource}
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}
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func (c *dynamicResourceClient) Namespace(ns string) ResourceInterface {
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ret := *c
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ret.namespace = ns
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return &ret
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}
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func (c *dynamicResourceClient) Create(ctx context.Context, obj *unstructured.Unstructured, opts metav1.CreateOptions, subresources ...string) (*unstructured.Unstructured, error) {
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outBytes, err := runtime.Encode(unstructured.UnstructuredJSONScheme, obj)
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if err != nil {
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return nil, err
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}
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name := ""
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if len(subresources) > 0 {
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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name = accessor.GetName()
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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result := c.client.client.
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Post().
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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SetHeader("Content-Type", runtime.ContentTypeJSON).
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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) Update(ctx context.Context, obj *unstructured.Unstructured, opts metav1.UpdateOptions, subresources ...string) (*unstructured.Unstructured, error) {
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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name := accessor.GetName()
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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outBytes, err := runtime.Encode(unstructured.UnstructuredJSONScheme, obj)
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if err != nil {
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return nil, err
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}
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result := c.client.client.
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Put().
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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SetHeader("Content-Type", runtime.ContentTypeJSON).
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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) UpdateStatus(ctx context.Context, obj *unstructured.Unstructured, opts metav1.UpdateOptions) (*unstructured.Unstructured, error) {
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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name := accessor.GetName()
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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outBytes, err := runtime.Encode(unstructured.UnstructuredJSONScheme, obj)
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if err != nil {
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return nil, err
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}
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result := c.client.client.
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Put().
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AbsPath(append(c.makeURLSegments(name), "status")...).
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SetHeader("Content-Type", runtime.ContentTypeJSON).
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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) Delete(ctx context.Context, name string, opts metav1.DeleteOptions, subresources ...string) error {
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if len(name) == 0 {
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return fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return err
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}
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deleteOptionsByte, err := runtime.Encode(deleteOptionsCodec.LegacyCodec(schema.GroupVersion{Version: "v1"}), &opts)
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if err != nil {
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return err
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}
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result := c.client.client.
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Delete().
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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SetHeader("Content-Type", runtime.ContentTypeJSON).
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Body(deleteOptionsByte).
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Do(ctx)
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return result.Error()
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}
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func (c *dynamicResourceClient) DeleteCollection(ctx context.Context, opts metav1.DeleteOptions, listOptions metav1.ListOptions) error {
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if err := validateNamespaceWithOptionalName(c.namespace); err != nil {
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return err
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}
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deleteOptionsByte, err := runtime.Encode(deleteOptionsCodec.LegacyCodec(schema.GroupVersion{Version: "v1"}), &opts)
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if err != nil {
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return err
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}
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result := c.client.client.
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Delete().
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AbsPath(c.makeURLSegments("")...).
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SetHeader("Content-Type", runtime.ContentTypeJSON).
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Body(deleteOptionsByte).
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SpecificallyVersionedParams(&listOptions, dynamicParameterCodec, versionV1).
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Do(ctx)
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return result.Error()
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}
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func (c *dynamicResourceClient) Get(ctx context.Context, name string, opts metav1.GetOptions, subresources ...string) (*unstructured.Unstructured, error) {
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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result := c.client.client.Get().AbsPath(append(c.makeURLSegments(name), subresources...)...).SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) List(ctx context.Context, opts metav1.ListOptions) (*unstructured.UnstructuredList, error) {
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if err := validateNamespaceWithOptionalName(c.namespace); err != nil {
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return nil, err
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}
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result := c.client.client.Get().AbsPath(c.makeURLSegments("")...).SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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if list, ok := uncastObj.(*unstructured.UnstructuredList); ok {
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return list, nil
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}
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list, err := uncastObj.(*unstructured.Unstructured).ToList()
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if err != nil {
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return nil, err
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}
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return list, nil
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}
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func (c *dynamicResourceClient) Watch(ctx context.Context, opts metav1.ListOptions) (watch.Interface, error) {
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opts.Watch = true
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if err := validateNamespaceWithOptionalName(c.namespace); err != nil {
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return nil, err
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}
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return c.client.client.Get().AbsPath(c.makeURLSegments("")...).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Watch(ctx)
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}
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func (c *dynamicResourceClient) Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts metav1.PatchOptions, subresources ...string) (*unstructured.Unstructured, error) {
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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result := c.client.client.
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Patch(pt).
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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Body(data).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) Apply(ctx context.Context, name string, obj *unstructured.Unstructured, opts metav1.ApplyOptions, subresources ...string) (*unstructured.Unstructured, error) {
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if len(name) == 0 {
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return nil, fmt.Errorf("name is required")
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}
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if err := validateNamespaceWithOptionalName(c.namespace, name); err != nil {
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return nil, err
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}
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outBytes, err := runtime.Encode(unstructured.UnstructuredJSONScheme, obj)
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if err != nil {
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return nil, err
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}
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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managedFields := accessor.GetManagedFields()
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if len(managedFields) > 0 {
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return nil, fmt.Errorf(`cannot apply an object with managed fields already set.
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Use the client-go/applyconfigurations "UnstructructuredExtractor" to obtain the unstructured ApplyConfiguration for the given field manager that you can use/modify here to apply`)
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}
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patchOpts := opts.ToPatchOptions()
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result := c.client.client.
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Patch(types.ApplyPatchType).
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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Body(outBytes).
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SpecificallyVersionedParams(&patchOpts, dynamicParameterCodec, versionV1).
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Do(ctx)
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if err := result.Error(); err != nil {
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return nil, err
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}
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retBytes, err := result.Raw()
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if err != nil {
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return nil, err
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, retBytes)
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if err != nil {
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return nil, err
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}
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return uncastObj.(*unstructured.Unstructured), nil
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}
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func (c *dynamicResourceClient) ApplyStatus(ctx context.Context, name string, obj *unstructured.Unstructured, opts metav1.ApplyOptions) (*unstructured.Unstructured, error) {
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return c.Apply(ctx, name, obj, opts, "status")
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}
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func validateNamespaceWithOptionalName(namespace string, name ...string) error {
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if msgs := rest.IsValidPathSegmentName(namespace); len(msgs) != 0 {
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return fmt.Errorf("invalid namespace %q: %v", namespace, msgs)
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}
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if len(name) > 1 {
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panic("Invalid number of names")
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} else if len(name) == 1 {
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if msgs := rest.IsValidPathSegmentName(name[0]); len(msgs) != 0 {
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return fmt.Errorf("invalid resource name %q: %v", name[0], msgs)
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}
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}
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return nil
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}
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func (c *dynamicResourceClient) makeURLSegments(name string) []string {
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url := []string{}
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if len(c.resource.Group) == 0 {
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url = append(url, "api")
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} else {
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url = append(url, "apis", c.resource.Group)
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}
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url = append(url, c.resource.Version)
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if len(c.namespace) > 0 {
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url = append(url, "namespaces", c.namespace)
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}
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url = append(url, c.resource.Resource)
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if len(name) > 0 {
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url = append(url, name)
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}
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return url
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}
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