66 lines
2.4 KiB
Go
66 lines
2.4 KiB
Go
/*
|
|
Copyright 2017 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 codec
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
// ensure the core apis are installed
|
|
_ "k8s.io/kubernetes/pkg/apis/core/install"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/serializer"
|
|
"k8s.io/kubernetes/pkg/api/legacyscheme"
|
|
"k8s.io/kubernetes/pkg/kubelet/apis/kubeletconfig"
|
|
)
|
|
|
|
// TODO(mtaufen): allow an encoder to be injected into checkpoint objects at creation time? (then we could ultimately instantiate only one encoder)
|
|
|
|
// NewJSONEncoder generates a new runtime.Encoder that encodes objects to JSON
|
|
func NewJSONEncoder(groupName string) (runtime.Encoder, error) {
|
|
// encode to json
|
|
mediaType := "application/json"
|
|
info, ok := runtime.SerializerInfoForMediaType(legacyscheme.Codecs.SupportedMediaTypes(), mediaType)
|
|
if !ok {
|
|
return nil, fmt.Errorf("unsupported media type %q", mediaType)
|
|
}
|
|
|
|
versions := legacyscheme.Registry.EnabledVersionsForGroup(groupName)
|
|
if len(versions) == 0 {
|
|
return nil, fmt.Errorf("no enabled versions for group %q", groupName)
|
|
}
|
|
|
|
// the "best" version supposedly comes first in the list returned from legacyscheme.Registry.EnabledVersionsForGroup
|
|
return legacyscheme.Codecs.EncoderForVersion(info.Serializer, versions[0]), nil
|
|
}
|
|
|
|
// DecodeKubeletConfiguration decodes a serialized KubeletConfiguration to the internal type
|
|
func DecodeKubeletConfiguration(kubeletCodecs *serializer.CodecFactory, data []byte) (*kubeletconfig.KubeletConfiguration, error) {
|
|
// the UniversalDecoder runs defaulting and returns the internal type by default
|
|
obj, gvk, err := kubeletCodecs.UniversalDecoder().Decode(data, nil, nil)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to decode, error: %v", err)
|
|
}
|
|
|
|
internalKC, ok := obj.(*kubeletconfig.KubeletConfiguration)
|
|
if !ok {
|
|
return nil, fmt.Errorf("failed to cast object to KubeletConfiguration, unexpected type: %v", gvk)
|
|
}
|
|
|
|
return internalKC, nil
|
|
}
|