105 lines
3.3 KiB
Go
105 lines
3.3 KiB
Go
/*
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Copyright 2024 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 leaderelection
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import (
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"context"
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"fmt"
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"time"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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coordinationv1alpha1informers "k8s.io/client-go/informers/coordination/v1alpha1"
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"k8s.io/client-go/kubernetes"
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listers "k8s.io/client-go/listers/coordination/v1alpha1"
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"k8s.io/client-go/tools/cache"
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"k8s.io/utils/clock"
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"k8s.io/klog/v2"
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)
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type LeaseCandidateGCController struct {
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kubeclientset kubernetes.Interface
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leaseCandidateLister listers.LeaseCandidateLister
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leaseCandidateInformer coordinationv1alpha1informers.LeaseCandidateInformer
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leaseCandidatesSynced cache.InformerSynced
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gcCheckPeriod time.Duration
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clock clock.Clock
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}
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// NewLeaseCandidateGC creates a new LeaseCandidateGCController.
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func NewLeaseCandidateGC(clientset kubernetes.Interface, gcCheckPeriod time.Duration, leaseCandidateInformer coordinationv1alpha1informers.LeaseCandidateInformer) *LeaseCandidateGCController {
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return &LeaseCandidateGCController{
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kubeclientset: clientset,
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leaseCandidateLister: leaseCandidateInformer.Lister(),
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leaseCandidateInformer: leaseCandidateInformer,
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leaseCandidatesSynced: leaseCandidateInformer.Informer().HasSynced,
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gcCheckPeriod: gcCheckPeriod,
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clock: clock.RealClock{},
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}
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}
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// Run starts one worker.
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func (c *LeaseCandidateGCController) Run(ctx context.Context) {
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defer utilruntime.HandleCrash()
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defer klog.Infof("Shutting down apiserver leasecandidate garbage collector")
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klog.Infof("Starting apiserver leasecandidate garbage collector")
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if !cache.WaitForCacheSync(ctx.Done(), c.leaseCandidatesSynced) {
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utilruntime.HandleError(fmt.Errorf("timed out waiting for caches to sync"))
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return
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}
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go wait.UntilWithContext(ctx, c.gc, c.gcCheckPeriod)
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<-ctx.Done()
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}
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func (c *LeaseCandidateGCController) gc(ctx context.Context) {
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lcs, err := c.leaseCandidateLister.List(labels.Everything())
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if err != nil {
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klog.ErrorS(err, "Error while listing lease candidates")
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return
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}
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for _, leaseCandidate := range lcs {
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// evaluate lease from cache
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if !isLeaseCandidateExpired(c.clock, leaseCandidate) {
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continue
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}
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lc, err := c.kubeclientset.CoordinationV1alpha1().LeaseCandidates(leaseCandidate.Namespace).Get(ctx, leaseCandidate.Name, metav1.GetOptions{})
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if err != nil {
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klog.ErrorS(err, "Error getting lc")
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continue
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}
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// evaluate lease from apiserver
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if !isLeaseCandidateExpired(c.clock, lc) {
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continue
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}
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if err := c.kubeclientset.CoordinationV1alpha1().LeaseCandidates(lc.Namespace).Delete(
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ctx, lc.Name, metav1.DeleteOptions{}); err != nil && !apierrors.IsNotFound(err) {
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klog.ErrorS(err, "Error deleting lease")
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}
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}
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}
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