mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-23 06:40:23 +00:00
308 lines
10 KiB
Go
308 lines
10 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes Authors.
|
|
|
|
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 metadata
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"time"
|
|
|
|
"k8s.io/klog"
|
|
|
|
metainternalversionscheme "k8s.io/apimachinery/pkg/apis/meta/internalversion/scheme"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/runtime/serializer"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/apimachinery/pkg/watch"
|
|
"k8s.io/client-go/rest"
|
|
)
|
|
|
|
var deleteScheme = runtime.NewScheme()
|
|
var parameterScheme = runtime.NewScheme()
|
|
var deleteOptionsCodec = serializer.NewCodecFactory(deleteScheme)
|
|
var dynamicParameterCodec = runtime.NewParameterCodec(parameterScheme)
|
|
|
|
var versionV1 = schema.GroupVersion{Version: "v1"}
|
|
|
|
func init() {
|
|
metav1.AddToGroupVersion(parameterScheme, versionV1)
|
|
metav1.AddToGroupVersion(deleteScheme, versionV1)
|
|
}
|
|
|
|
// Client allows callers to retrieve the object metadata for any
|
|
// Kubernetes-compatible API endpoint. The client uses the
|
|
// meta.k8s.io/v1 PartialObjectMetadata resource to more efficiently
|
|
// retrieve just the necessary metadata, but on older servers
|
|
// (Kubernetes 1.14 and before) will retrieve the object and then
|
|
// convert the metadata.
|
|
type Client struct {
|
|
client *rest.RESTClient
|
|
}
|
|
|
|
var _ Interface = &Client{}
|
|
|
|
// ConfigFor returns a copy of the provided config with the
|
|
// appropriate metadata client defaults set.
|
|
func ConfigFor(inConfig *rest.Config) *rest.Config {
|
|
config := rest.CopyConfig(inConfig)
|
|
config.AcceptContentTypes = "application/vnd.kubernetes.protobuf,application/json"
|
|
config.ContentType = "application/vnd.kubernetes.protobuf"
|
|
config.NegotiatedSerializer = metainternalversionscheme.Codecs.WithoutConversion()
|
|
if config.UserAgent == "" {
|
|
config.UserAgent = rest.DefaultKubernetesUserAgent()
|
|
}
|
|
return config
|
|
}
|
|
|
|
// NewForConfigOrDie creates a new metadata client for the given config and
|
|
// panics if there is an error in the config.
|
|
func NewForConfigOrDie(c *rest.Config) Interface {
|
|
ret, err := NewForConfig(c)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// NewForConfig creates a new metadata client that can retrieve object
|
|
// metadata details about any Kubernetes object (core, aggregated, or custom
|
|
// resource based) in the form of PartialObjectMetadata objects, or returns
|
|
// an error.
|
|
func NewForConfig(inConfig *rest.Config) (Interface, error) {
|
|
config := ConfigFor(inConfig)
|
|
// for serializing the options
|
|
config.GroupVersion = &schema.GroupVersion{}
|
|
config.APIPath = "/this-value-should-never-be-sent"
|
|
|
|
restClient, err := rest.RESTClientFor(config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &Client{client: restClient}, nil
|
|
}
|
|
|
|
type client struct {
|
|
client *Client
|
|
namespace string
|
|
resource schema.GroupVersionResource
|
|
}
|
|
|
|
// Resource returns an interface that can access cluster or namespace
|
|
// scoped instances of resource.
|
|
func (c *Client) Resource(resource schema.GroupVersionResource) Getter {
|
|
return &client{client: c, resource: resource}
|
|
}
|
|
|
|
// Namespace returns an interface that can access namespace-scoped instances of the
|
|
// provided resource.
|
|
func (c *client) Namespace(ns string) ResourceInterface {
|
|
ret := *c
|
|
ret.namespace = ns
|
|
return &ret
|
|
}
|
|
|
|
// Delete removes the provided resource from the server.
|
|
func (c *client) Delete(ctx context.Context, name string, opts metav1.DeleteOptions, subresources ...string) error {
|
|
if len(name) == 0 {
|
|
return fmt.Errorf("name is required")
|
|
}
|
|
deleteOptionsByte, err := runtime.Encode(deleteOptionsCodec.LegacyCodec(schema.GroupVersion{Version: "v1"}), &opts)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
result := c.client.client.
|
|
Delete().
|
|
AbsPath(append(c.makeURLSegments(name), subresources...)...).
|
|
Body(deleteOptionsByte).
|
|
Do(ctx)
|
|
return result.Error()
|
|
}
|
|
|
|
// DeleteCollection triggers deletion of all resources in the specified scope (namespace or cluster).
|
|
func (c *client) DeleteCollection(ctx context.Context, opts metav1.DeleteOptions, listOptions metav1.ListOptions) error {
|
|
deleteOptionsByte, err := runtime.Encode(deleteOptionsCodec.LegacyCodec(schema.GroupVersion{Version: "v1"}), &opts)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
result := c.client.client.
|
|
Delete().
|
|
AbsPath(c.makeURLSegments("")...).
|
|
Body(deleteOptionsByte).
|
|
SpecificallyVersionedParams(&listOptions, dynamicParameterCodec, versionV1).
|
|
Do(ctx)
|
|
return result.Error()
|
|
}
|
|
|
|
// Get returns the resource with name from the specified scope (namespace or cluster).
|
|
func (c *client) Get(ctx context.Context, name string, opts metav1.GetOptions, subresources ...string) (*metav1.PartialObjectMetadata, error) {
|
|
if len(name) == 0 {
|
|
return nil, fmt.Errorf("name is required")
|
|
}
|
|
result := c.client.client.Get().AbsPath(append(c.makeURLSegments(name), subresources...)...).
|
|
SetHeader("Accept", "application/vnd.kubernetes.protobuf;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json").
|
|
SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
|
|
Do(ctx)
|
|
if err := result.Error(); err != nil {
|
|
return nil, err
|
|
}
|
|
obj, err := result.Get()
|
|
if runtime.IsNotRegisteredError(err) {
|
|
klog.V(5).Infof("Unable to retrieve PartialObjectMetadata: %#v", err)
|
|
rawBytes, err := result.Raw()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var partial metav1.PartialObjectMetadata
|
|
if err := json.Unmarshal(rawBytes, &partial); err != nil {
|
|
return nil, fmt.Errorf("unable to decode returned object as PartialObjectMetadata: %v", err)
|
|
}
|
|
if !isLikelyObjectMetadata(&partial) {
|
|
return nil, fmt.Errorf("object does not appear to match the ObjectMeta schema: %#v", partial)
|
|
}
|
|
partial.TypeMeta = metav1.TypeMeta{}
|
|
return &partial, nil
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
partial, ok := obj.(*metav1.PartialObjectMetadata)
|
|
if !ok {
|
|
return nil, fmt.Errorf("unexpected object, expected PartialObjectMetadata but got %T", obj)
|
|
}
|
|
return partial, nil
|
|
}
|
|
|
|
// List returns all resources within the specified scope (namespace or cluster).
|
|
func (c *client) List(ctx context.Context, opts metav1.ListOptions) (*metav1.PartialObjectMetadataList, error) {
|
|
result := c.client.client.Get().AbsPath(c.makeURLSegments("")...).
|
|
SetHeader("Accept", "application/vnd.kubernetes.protobuf;as=PartialObjectMetadataList;g=meta.k8s.io;v=v1,application/json;as=PartialObjectMetadataList;g=meta.k8s.io;v=v1,application/json").
|
|
SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
|
|
Do(ctx)
|
|
if err := result.Error(); err != nil {
|
|
return nil, err
|
|
}
|
|
obj, err := result.Get()
|
|
if runtime.IsNotRegisteredError(err) {
|
|
klog.V(5).Infof("Unable to retrieve PartialObjectMetadataList: %#v", err)
|
|
rawBytes, err := result.Raw()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var partial metav1.PartialObjectMetadataList
|
|
if err := json.Unmarshal(rawBytes, &partial); err != nil {
|
|
return nil, fmt.Errorf("unable to decode returned object as PartialObjectMetadataList: %v", err)
|
|
}
|
|
partial.TypeMeta = metav1.TypeMeta{}
|
|
return &partial, nil
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
partial, ok := obj.(*metav1.PartialObjectMetadataList)
|
|
if !ok {
|
|
return nil, fmt.Errorf("unexpected object, expected PartialObjectMetadata but got %T", obj)
|
|
}
|
|
return partial, nil
|
|
}
|
|
|
|
// Watch finds all changes to the resources in the specified scope (namespace or cluster).
|
|
func (c *client) Watch(ctx context.Context, opts metav1.ListOptions) (watch.Interface, error) {
|
|
var timeout time.Duration
|
|
if opts.TimeoutSeconds != nil {
|
|
timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
|
|
}
|
|
opts.Watch = true
|
|
return c.client.client.Get().
|
|
AbsPath(c.makeURLSegments("")...).
|
|
SetHeader("Accept", "application/vnd.kubernetes.protobuf;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json").
|
|
SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
|
|
Timeout(timeout).
|
|
Watch(ctx)
|
|
}
|
|
|
|
// Patch modifies the named resource in the specified scope (namespace or cluster).
|
|
func (c *client) Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts metav1.PatchOptions, subresources ...string) (*metav1.PartialObjectMetadata, error) {
|
|
if len(name) == 0 {
|
|
return nil, fmt.Errorf("name is required")
|
|
}
|
|
result := c.client.client.
|
|
Patch(pt).
|
|
AbsPath(append(c.makeURLSegments(name), subresources...)...).
|
|
Body(data).
|
|
SetHeader("Accept", "application/vnd.kubernetes.protobuf;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json;as=PartialObjectMetadata;g=meta.k8s.io;v=v1,application/json").
|
|
SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
|
|
Do(ctx)
|
|
if err := result.Error(); err != nil {
|
|
return nil, err
|
|
}
|
|
obj, err := result.Get()
|
|
if runtime.IsNotRegisteredError(err) {
|
|
rawBytes, err := result.Raw()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var partial metav1.PartialObjectMetadata
|
|
if err := json.Unmarshal(rawBytes, &partial); err != nil {
|
|
return nil, fmt.Errorf("unable to decode returned object as PartialObjectMetadata: %v", err)
|
|
}
|
|
if !isLikelyObjectMetadata(&partial) {
|
|
return nil, fmt.Errorf("object does not appear to match the ObjectMeta schema")
|
|
}
|
|
partial.TypeMeta = metav1.TypeMeta{}
|
|
return &partial, nil
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
partial, ok := obj.(*metav1.PartialObjectMetadata)
|
|
if !ok {
|
|
return nil, fmt.Errorf("unexpected object, expected PartialObjectMetadata but got %T", obj)
|
|
}
|
|
return partial, nil
|
|
}
|
|
|
|
func (c *client) makeURLSegments(name string) []string {
|
|
url := []string{}
|
|
if len(c.resource.Group) == 0 {
|
|
url = append(url, "api")
|
|
} else {
|
|
url = append(url, "apis", c.resource.Group)
|
|
}
|
|
url = append(url, c.resource.Version)
|
|
|
|
if len(c.namespace) > 0 {
|
|
url = append(url, "namespaces", c.namespace)
|
|
}
|
|
url = append(url, c.resource.Resource)
|
|
|
|
if len(name) > 0 {
|
|
url = append(url, name)
|
|
}
|
|
|
|
return url
|
|
}
|
|
|
|
func isLikelyObjectMetadata(meta *metav1.PartialObjectMetadata) bool {
|
|
return len(meta.UID) > 0 || !meta.CreationTimestamp.IsZero() || len(meta.Name) > 0 || len(meta.GenerateName) > 0
|
|
}
|