Golang versioning.NewCodecForScheme函數代碼示例

// New creates a new WebhookAuthorizer from the provided kubeconfig file.
//
// The config's cluster field is used to refer to the remote service, user refers to the returned authorizer.
//
//     # clusters refers to the remote service.
//     clusters:
//     - name: name-of-remote-authz-service
//       cluster:
//         certificate-authority: /path/to/ca.pem      # CA for verifying the remote service.
//         server: https://authz.example.com/authorize # URL of remote service to query. Must use 'https'.
//
//     # users refers to the API server's webhook configuration.
//     users:
//     - name: name-of-api-server
//       user:
//         client-certificate: /path/to/cert.pem # cert for the webhook plugin to use
//         client-key: /path/to/key.pem          # key matching the cert
//
// For additional HTTP configuration, refer to the kubeconfig documentation
// http://kubernetes.io/v1.1/docs/user-guide/kubeconfig-file.html.
func New(kubeConfigFile string) (*WebhookAuthorizer, error) {

	for _, groupVersion := range requireEnabled {
		if !registered.IsEnabledVersion(groupVersion) {
			return nil, fmt.Errorf("webhook authz plugin requires enabling extension resource: %s", groupVersion)
		}
	}

	loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
	loadingRules.ExplicitPath = kubeConfigFile
	loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, &clientcmd.ConfigOverrides{})

	clientConfig, err := loader.ClientConfig()
	if err != nil {
		return nil, err
	}
	serializer := json.NewSerializer(json.DefaultMetaFactory, api.Scheme, runtime.ObjectTyperToTyper(api.Scheme), false)
	clientConfig.ContentConfig.Codec = versioning.NewCodecForScheme(api.Scheme, serializer, serializer, encodeVersions, decodeVersions)

	restClient, err := restclient.UnversionedRESTClientFor(clientConfig)
	if err != nil {
		return nil, err
	}

	// TODO(ericchiang): Can we ensure remote service is reachable?

	return &WebhookAuthorizer{restClient}, nil
}

func init() {
	jsonSerializer := json.NewSerializer(json.DefaultMetaFactory, api.Scheme, api.Scheme, true)
	Codec = versioning.NewCodecForScheme(
		api.Scheme,
		jsonSerializer,
		jsonSerializer,
		[]unversioned.GroupVersion{{Version: Version}},
		[]unversioned.GroupVersion{{Version: runtime.APIVersionInternal}},
	)
}

func init() {
	yamlSerializer := json.NewYAMLSerializer(json.DefaultMetaFactory, api.Scheme, api.Scheme)
	Codec = versioning.NewCodecForScheme(
		api.Scheme,
		yamlSerializer,
		yamlSerializer,
		unversioned.GroupVersion{Version: Version},
		runtime.InternalGroupVersioner,
	)
}

// CodecForVersions creates a codec with the provided serializer. If an object is decoded and its group is not in the list,
// it will default to runtime.APIVersionInternal. If encode is not specified for an object's group, the object is not
// converted. If encode or decode are nil, no conversion is performed.
func (f CodecFactory) CodecForVersions(encoder runtime.Encoder, decoder runtime.Decoder, encode runtime.GroupVersioner, decode runtime.GroupVersioner) runtime.Codec {
	// TODO: these are for backcompat, remove them in the future
	if encode == nil {
		encode = runtime.DisabledGroupVersioner
	}
	if decode == nil {
		decode = runtime.InternalGroupVersioner
	}
	return versioning.NewCodecForScheme(f.scheme, encoder, decoder, encode, decode)
}

func init() {
	yamlSerializer := json.NewYAMLSerializer(json.DefaultMetaFactory, api.Scheme, runtime.ObjectTyperToTyper(api.Scheme))
	Codec = versioning.NewCodecForScheme(
		api.Scheme,
		yamlSerializer,
		yamlSerializer,
		[]unversioned.GroupVersion{{Version: Version}},
		[]unversioned.GroupVersion{{Version: runtime.APIVersionInternal}},
	)
}

func init() {
	Scheme = runtime.NewScheme()
	if err := api.AddToScheme(Scheme); err != nil {
		// Programmer error, detect immediately
		panic(err)
	}
	if err := v1.AddToScheme(Scheme); err != nil {
		// Programmer error, detect immediately
		panic(err)
	}
	yamlSerializer := json.NewYAMLSerializer(json.DefaultMetaFactory, Scheme, Scheme)
	Codec = versioning.NewCodecForScheme(
		Scheme,
		yamlSerializer,
		yamlSerializer,
		unversioned.GroupVersion{Version: Version},
		runtime.InternalGroupVersioner,
	)
}

// CodecFor creates a codec with the provided serializer. If an object is decoded and its group is not in the list,
// it will default to runtime.APIVersionInternal. If encode is not specified for an object's group, the object is not
// converted. If encode or decode are nil, no conversion is performed.
func (f CodecFactory) CodecForVersions(encoder runtime.Encoder, decoder runtime.Decoder, encode []unversioned.GroupVersion, decode []unversioned.GroupVersion) runtime.Codec {
	return versioning.NewCodecForScheme(f.scheme, encoder, decoder, encode, decode)
}

// LegacyCodec encodes output to a given API version, and decodes output into the internal form from
// any recognized source. The returned codec will always encode output to JSON.
//
// This method is deprecated - clients and servers should negotiate a serializer by mime-type and
// invoke CodecForVersions. Callers that need only to read data should use UniversalDecoder().
func (f CodecFactory) LegacyCodec(version ...unversioned.GroupVersion) runtime.Codec {
	return versioning.NewCodecForScheme(f.scheme, f.legacySerializer, f.universal, version, nil)
}

// CodecFor creates a codec with the provided serializer. If an object is decoded and its group is not in the list,
// it will default to runtime.APIVersionInternal. If encode is not specified for an object's group, the object is not
// converted. If encode or decode are nil, no conversion is performed.
func (f CodecFactory) CodecForVersions(serializer runtime.Serializer, encode []unversioned.GroupVersion, decode []unversioned.GroupVersion) runtime.Codec {
	return versioning.NewCodecForScheme(f.scheme, serializer, serializer, encode, decode)
}

import (
	"k8s.io/kubernetes/pkg/api/unversioned"
	"k8s.io/kubernetes/pkg/runtime"
	"k8s.io/kubernetes/pkg/runtime/serializer/json"
	"k8s.io/kubernetes/pkg/runtime/serializer/versioning"
	"k8s.io/kubernetes/plugin/pkg/scheduler/api"
	_ "k8s.io/kubernetes/plugin/pkg/scheduler/api/v1"
)

// Version is the string that represents the current external default version.
const Version = "v1"

// OldestVersion is the string that represents the oldest server version supported.
const OldestVersion = "v1"

// Versions is the list of versions that are recognized in code. The order provided
// may be assumed to be least feature rich to most feature rich, and clients may
// choose to prefer the latter items in the list over the former items when presented
// with a set of versions to choose.
var Versions = []string{"v1"}

// Codec is the default codec for serializing input that should use
// the latest supported version. It supports JSON by default.
var Codec = versioning.NewCodecForScheme(
	api.Scheme,
	json.NewSerializer(json.DefaultMetaFactory, api.Scheme, runtime.ObjectTyperToTyper(api.Scheme), true),
	[]unversioned.GroupVersion{{Version: Version}},
	[]unversioned.GroupVersion{{Version: runtime.APIVersionInternal}},
)