a90d81620b
This reverts commitf4afdecef8, reversing changes made toe633a1604f. This also fixes a bug where Kubemark was still using the core api scheme to manipulate the Kubelet's types, which was the cause of the initial revert.
96 lines
3.0 KiB
Go
96 lines
3.0 KiB
Go
/*
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Copyright 2017 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 checkpoint
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import (
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"fmt"
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apiv1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/kubernetes/pkg/kubelet/apis/kubeletconfig"
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kubeletscheme "k8s.io/kubernetes/pkg/kubelet/apis/kubeletconfig/scheme"
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utilcodec "k8s.io/kubernetes/pkg/kubelet/kubeletconfig/util/codec"
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)
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const configMapConfigKey = "kubelet"
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// configMapCheckpoint implements Checkpoint, backed by a v1/ConfigMap config source object
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type configMapCheckpoint struct {
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kubeletCodecs *serializer.CodecFactory // codecs for the KubeletConfiguration
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configMap *apiv1.ConfigMap
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}
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// NewConfigMapCheckpoint returns a Checkpoint backed by `cm`. `cm` must be non-nil
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// and have a non-empty ObjectMeta.UID, or an error will be returned.
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func NewConfigMapCheckpoint(cm *apiv1.ConfigMap) (Checkpoint, error) {
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if cm == nil {
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return nil, fmt.Errorf("ConfigMap must be non-nil to be treated as a Checkpoint")
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} else if len(cm.ObjectMeta.UID) == 0 {
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return nil, fmt.Errorf("ConfigMap must have a UID to be treated as a Checkpoint")
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}
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_, kubeletCodecs, err := kubeletscheme.NewSchemeAndCodecs()
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if err != nil {
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return nil, err
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}
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return &configMapCheckpoint{kubeletCodecs, cm}, nil
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}
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// UID returns the UID of a configMapCheckpoint
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func (c *configMapCheckpoint) UID() string {
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return string(c.configMap.UID)
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}
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// Parse extracts the KubeletConfiguration from v1/ConfigMap checkpoints, applies defaults, and converts to the internal type
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func (c *configMapCheckpoint) Parse() (*kubeletconfig.KubeletConfiguration, error) {
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const emptyCfgErr = "config was empty, but some parameters are required"
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if len(c.configMap.Data) == 0 {
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return nil, fmt.Errorf(emptyCfgErr)
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}
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// TODO(mtaufen): Once the KubeletConfiguration type is decomposed, extend this to a key for each sub-object
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config, ok := c.configMap.Data[configMapConfigKey]
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if !ok {
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return nil, fmt.Errorf("key %q not found in ConfigMap", configMapConfigKey)
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} else if len(config) == 0 {
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return nil, fmt.Errorf(emptyCfgErr)
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}
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return utilcodec.DecodeKubeletConfiguration(c.kubeletCodecs, []byte(config))
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}
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// Encode encodes a configMapCheckpoint
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func (c *configMapCheckpoint) Encode() ([]byte, error) {
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cm := c.configMap
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encoder, err := utilcodec.NewJSONEncoder(apiv1.GroupName)
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if err != nil {
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return nil, err
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}
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data, err := runtime.Encode(encoder, cm)
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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func (c *configMapCheckpoint) object() interface{} {
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return c.configMap
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}
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