mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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138 lines
4.0 KiB
Go
138 lines
4.0 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 gc
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import (
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"sort"
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"sync"
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"time"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/client/cache"
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"k8s.io/kubernetes/pkg/client/record"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/framework"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/util"
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"k8s.io/kubernetes/pkg/watch"
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"github.com/golang/glog"
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)
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const (
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gcCheckPeriod = 20 * time.Second
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)
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type GCController struct {
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kubeClient client.Interface
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podStore cache.StoreToPodLister
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podStoreSyncer *framework.Controller
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deletePod func(namespace, name string) error
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threshold int
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}
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func New(kubeClient client.Interface, resyncPeriod controller.ResyncPeriodFunc, threshold int) *GCController {
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eventBroadcaster := record.NewBroadcaster()
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eventBroadcaster.StartLogging(glog.Infof)
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eventBroadcaster.StartRecordingToSink(kubeClient.Events(""))
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gcc := &GCController{
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kubeClient: kubeClient,
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threshold: threshold,
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deletePod: func(namespace, name string) error {
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return kubeClient.Pods(namespace).Delete(name, api.NewDeleteOptions(0))
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},
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}
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terminatedSelector := compileTerminatedPodSelector()
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gcc.podStore.Store, gcc.podStoreSyncer = framework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (runtime.Object, error) {
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options.FieldSelector = terminatedSelector
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return gcc.kubeClient.Pods(api.NamespaceAll).List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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options.FieldSelector = terminatedSelector
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return gcc.kubeClient.Pods(api.NamespaceAll).Watch(options)
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},
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},
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&api.Pod{},
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resyncPeriod(),
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framework.ResourceEventHandlerFuncs{},
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)
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return gcc
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}
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func (gcc *GCController) Run(stop <-chan struct{}) {
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go gcc.podStoreSyncer.Run(stop)
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go util.Until(gcc.gc, gcCheckPeriod, stop)
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<-stop
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}
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func (gcc *GCController) gc() {
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terminatedPods, _ := gcc.podStore.List(labels.Everything())
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terminatedPodCount := len(terminatedPods)
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sort.Sort(byCreationTimestamp(terminatedPods))
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deleteCount := terminatedPodCount - gcc.threshold
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if deleteCount > terminatedPodCount {
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deleteCount = terminatedPodCount
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}
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if deleteCount > 0 {
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glog.Infof("garbage collecting %v pods", deleteCount)
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}
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var wait sync.WaitGroup
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for i := 0; i < deleteCount; i++ {
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wait.Add(1)
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go func(namespace string, name string) {
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defer wait.Done()
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if err := gcc.deletePod(namespace, name); err != nil {
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// ignore not founds
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defer util.HandleError(err)
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}
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}(terminatedPods[i].Namespace, terminatedPods[i].Name)
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}
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wait.Wait()
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}
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func compileTerminatedPodSelector() fields.Selector {
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selector, err := fields.ParseSelector("status.phase!=" + string(api.PodPending) + ",status.phase!=" + string(api.PodRunning) + ",status.phase!=" + string(api.PodUnknown))
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if err != nil {
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panic("terminatedSelector must compile: " + err.Error())
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}
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return selector
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}
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// byCreationTimestamp sorts a list by creation timestamp, using their names as a tie breaker.
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type byCreationTimestamp []*api.Pod
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func (o byCreationTimestamp) Len() int { return len(o) }
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func (o byCreationTimestamp) Swap(i, j int) { o[i], o[j] = o[j], o[i] }
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func (o byCreationTimestamp) Less(i, j int) bool {
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if o[i].CreationTimestamp.Equal(o[j].CreationTimestamp) {
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return o[i].Name < o[j].Name
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}
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return o[i].CreationTimestamp.Before(o[j].CreationTimestamp)
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}
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