356 lines
10 KiB
Go
356 lines
10 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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"fmt"
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"io"
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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/runtime/serializer/streaming"
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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.RESTClient
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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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// NewForConfigOrDie creates a new Interface 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) Interface {
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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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func NewForConfig(inConfig *rest.Config) (Interface, 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.RESTClientFor(config)
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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(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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result := c.client.client.
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Post().
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AbsPath(append(c.makeURLSegments(name), subresources...)...).
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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do()
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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(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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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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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do()
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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(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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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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Body(outBytes).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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Do()
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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(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 opts == nil {
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opts = &metav1.DeleteOptions{}
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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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Body(deleteOptionsByte).
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Do()
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return result.Error()
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}
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func (c *dynamicResourceClient) DeleteCollection(opts *metav1.DeleteOptions, listOptions metav1.ListOptions) error {
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if opts == nil {
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opts = &metav1.DeleteOptions{}
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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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Body(deleteOptionsByte).
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SpecificallyVersionedParams(&listOptions, dynamicParameterCodec, versionV1).
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Do()
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return result.Error()
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}
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func (c *dynamicResourceClient) Get(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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result := c.client.client.Get().AbsPath(append(c.makeURLSegments(name), subresources...)...).SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).Do()
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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(opts metav1.ListOptions) (*unstructured.UnstructuredList, error) {
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result := c.client.client.Get().AbsPath(c.makeURLSegments("")...).SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).Do()
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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(opts metav1.ListOptions) (watch.Interface, error) {
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internalGV := schema.GroupVersions{
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{Group: c.resource.Group, Version: runtime.APIVersionInternal},
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// always include the legacy group as a decoding target to handle non-error `Status` return types
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{Group: "", Version: runtime.APIVersionInternal},
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}
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s := &rest.Serializers{
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Encoder: watchNegotiatedSerializerInstance.EncoderForVersion(watchJsonSerializerInfo.Serializer, c.resource.GroupVersion()),
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Decoder: watchNegotiatedSerializerInstance.DecoderToVersion(watchJsonSerializerInfo.Serializer, internalGV),
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RenegotiatedDecoder: func(contentType string, params map[string]string) (runtime.Decoder, error) {
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return watchNegotiatedSerializerInstance.DecoderToVersion(watchJsonSerializerInfo.Serializer, internalGV), nil
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},
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StreamingSerializer: watchJsonSerializerInfo.StreamSerializer.Serializer,
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Framer: watchJsonSerializerInfo.StreamSerializer.Framer,
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}
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wrappedDecoderFn := func(body io.ReadCloser) streaming.Decoder {
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framer := s.Framer.NewFrameReader(body)
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return streaming.NewDecoder(framer, s.StreamingSerializer)
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}
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opts.Watch = true
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return c.client.client.Get().AbsPath(c.makeURLSegments("")...).
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SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
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WatchWithSpecificDecoders(wrappedDecoderFn, unstructured.UnstructuredJSONScheme)
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}
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func (c *dynamicResourceClient) Patch(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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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()
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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) 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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