mirror of https://github.com/k3s-io/k3s
103 lines
2.9 KiB
Go
103 lines
2.9 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 kubelet
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import (
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"fmt"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
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)
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// Mirror client is used to create/delete a mirror pod.
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type mirrorClient interface {
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CreateMirrorPod(*api.Pod) error
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DeleteMirrorPod(string) error
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}
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type basicMirrorClient struct {
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// mirror pods are stored in the kubelet directly because they need to be
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// in sync with the internal pods.
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apiserverClient client.Interface
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}
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func newBasicMirrorClient(apiserverClient client.Interface) *basicMirrorClient {
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return &basicMirrorClient{apiserverClient: apiserverClient}
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}
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// Creates a mirror pod.
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func (mc *basicMirrorClient) CreateMirrorPod(pod *api.Pod) error {
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if mc.apiserverClient == nil {
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return nil
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}
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// Make a copy of the pod.
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copyPod := *pod
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copyPod.Annotations = make(map[string]string)
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for k, v := range pod.Annotations {
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copyPod.Annotations[k] = v
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}
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copyPod.Annotations[kubetypes.ConfigMirrorAnnotationKey] = kubetypes.MirrorType
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_, err := mc.apiserverClient.Pods(copyPod.Namespace).Create(©Pod)
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return err
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}
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// Deletes a mirror pod.
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func (mc *basicMirrorClient) DeleteMirrorPod(podFullName string) error {
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if mc.apiserverClient == nil {
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return nil
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}
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name, namespace, err := kubecontainer.ParsePodFullName(podFullName)
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if err != nil {
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glog.Errorf("Failed to parse a pod full name %q", podFullName)
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return err
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}
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glog.V(4).Infof("Deleting a mirror pod %q", podFullName)
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if err := mc.apiserverClient.Pods(namespace).Delete(name, api.NewDeleteOptions(0)); err != nil {
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glog.Errorf("Failed deleting a mirror pod %q: %v", podFullName, err)
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}
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return nil
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}
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// Helper functions.
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func getPodSource(pod *api.Pod) (string, error) {
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if pod.Annotations != nil {
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if source, ok := pod.Annotations[kubetypes.ConfigSourceAnnotationKey]; ok {
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return source, nil
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}
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}
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return "", fmt.Errorf("cannot get source of pod %q", pod.UID)
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}
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func isStaticPod(pod *api.Pod) bool {
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source, err := getPodSource(pod)
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return err == nil && source != kubetypes.ApiserverSource
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}
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func isMirrorPod(pod *api.Pod) bool {
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if value, ok := pod.Annotations[kubetypes.ConfigMirrorAnnotationKey]; !ok {
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return false
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} else {
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return value == kubetypes.MirrorType
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}
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}
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