mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
/*
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Copyright 2020 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 kubelet
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import (
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"sort"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
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"k8s.io/klog/v2"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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)
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const (
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// The number of sandboxes which can be deleted in parallel.
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sandboxDeletionBufferLimit = 20
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)
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type sandboxStatusByCreatedList []*runtimeapi.PodSandboxStatus
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type podSandboxDeleter struct {
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worker chan<- string
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}
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func (a sandboxStatusByCreatedList) Len() int { return len(a) }
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func (a sandboxStatusByCreatedList) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a sandboxStatusByCreatedList) Less(i, j int) bool {
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return a[i].CreatedAt > a[j].CreatedAt
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}
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func newPodSandboxDeleter(runtime kubecontainer.Runtime) *podSandboxDeleter {
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buffer := make(chan string, sandboxDeletionBufferLimit)
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go wait.Forever(func() {
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for id := range buffer {
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if err := runtime.DeleteSandbox(id); err != nil {
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klog.Warningf("[pod_sandbox_deleter] DeleteSandbox returned error for (id=%v): %v", id, err)
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}
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}
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}, 0)
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return &podSandboxDeleter{
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worker: buffer,
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}
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}
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// deleteSandboxesInPod issues sandbox deletion requests for all inactive sandboxes after sorting by creation time
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// and skipping toKeep number of sandboxes
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func (p *podSandboxDeleter) deleteSandboxesInPod(podStatus *kubecontainer.PodStatus, toKeep int) {
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sandboxIDs := sets.NewString()
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for _, containerStatus := range podStatus.ContainerStatuses {
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sandboxIDs.Insert(containerStatus.PodSandboxID)
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}
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sandboxStatuses := podStatus.SandboxStatuses
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if toKeep > 0 {
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sort.Sort(sandboxStatusByCreatedList(sandboxStatuses))
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}
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for i := len(sandboxStatuses) - 1; i >= toKeep; i-- {
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if _, ok := sandboxIDs[sandboxStatuses[i].Id]; !ok && sandboxStatuses[i].State != runtimeapi.PodSandboxState_SANDBOX_READY {
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select {
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case p.worker <- sandboxStatuses[i].Id:
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default:
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klog.Warningf("Failed to issue the request to remove sandbox %v", sandboxStatuses[i].Id)
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}
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}
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}
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}
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