3bd975862a
When Pod state changes rapidly, endpoints controller may use outdated informer cache to sync Service. If the outdated endpoints appear to be expected by the controller, it skips updating it. The commit fixes it by checking if endpoints informer cache is outdated when processing a service. If the endpoints is stale, it returns an error and retries later. Signed-off-by: Quan Tian <quan.tian@broadcom.com>
65 lines
2.0 KiB
Go
65 lines
2.0 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 endpoint
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import (
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"sync"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/types"
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)
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// staleEndpointsTracker tracks Endpoints and their stale resource versions to
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// help determine if an Endpoints is stale.
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type staleEndpointsTracker struct {
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// lock protects staleResourceVersionByEndpoints.
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lock sync.RWMutex
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// staleResourceVersionByEndpoints tracks the stale resource version of Endpoints.
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staleResourceVersionByEndpoints map[types.NamespacedName]string
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}
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func newStaleEndpointsTracker() *staleEndpointsTracker {
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return &staleEndpointsTracker{
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staleResourceVersionByEndpoints: map[types.NamespacedName]string{},
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}
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}
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func (t *staleEndpointsTracker) Stale(endpoints *v1.Endpoints) {
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t.lock.Lock()
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defer t.lock.Unlock()
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nn := types.NamespacedName{Name: endpoints.Name, Namespace: endpoints.Namespace}
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t.staleResourceVersionByEndpoints[nn] = endpoints.ResourceVersion
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}
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func (t *staleEndpointsTracker) IsStale(endpoints *v1.Endpoints) bool {
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t.lock.RLock()
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defer t.lock.RUnlock()
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nn := types.NamespacedName{Name: endpoints.Name, Namespace: endpoints.Namespace}
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staleResourceVersion, exists := t.staleResourceVersionByEndpoints[nn]
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if exists && staleResourceVersion == endpoints.ResourceVersion {
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return true
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}
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return false
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}
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func (t *staleEndpointsTracker) Delete(namespace, name string) {
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t.lock.Lock()
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defer t.lock.Unlock()
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nn := types.NamespacedName{Namespace: namespace, Name: name}
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delete(t.staleResourceVersionByEndpoints, nn)
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}
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