780accb3ba
The sync loop should check for terminated pods that are no longer running and clear them. The status loop should never write status if the pod UID changes. Mirror pods should be deleted immediately rather than gracefully.
95 lines
2.6 KiB
Go
95 lines
2.6 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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"k8s.io/kubernetes/pkg/client"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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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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pod.Annotations[ConfigMirrorAnnotationKey] = MirrorType
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_, err := mc.apiserverClient.Pods(pod.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[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 != ApiserverSource
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}
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func isMirrorPod(pod *api.Pod) bool {
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if value, ok := pod.Annotations[ConfigMirrorAnnotationKey]; !ok {
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return false
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} else {
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return value == MirrorType
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}
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}
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