77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
/*
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Copyright 2018 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 debugger
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import (
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"context"
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"os"
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"os/signal"
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corelisters "k8s.io/client-go/listers/core/v1"
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"k8s.io/klog/v2"
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internalcache "k8s.io/kubernetes/pkg/scheduler/internal/cache"
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internalqueue "k8s.io/kubernetes/pkg/scheduler/internal/queue"
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)
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// CacheDebugger provides ways to check and write cache information for debugging.
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type CacheDebugger struct {
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Comparer CacheComparer
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Dumper CacheDumper
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}
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// New creates a CacheDebugger.
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func New(
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nodeLister corelisters.NodeLister,
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podLister corelisters.PodLister,
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cache internalcache.Cache,
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podQueue internalqueue.SchedulingQueue,
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) *CacheDebugger {
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return &CacheDebugger{
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Comparer: CacheComparer{
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NodeLister: nodeLister,
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PodLister: podLister,
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Cache: cache,
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PodQueue: podQueue,
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},
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Dumper: CacheDumper{
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cache: cache,
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podQueue: podQueue,
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},
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}
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}
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// ListenForSignal starts a goroutine that will trigger the CacheDebugger's
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// behavior when the process receives SIGINT (Windows) or SIGUSER2 (non-Windows).
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func (d *CacheDebugger) ListenForSignal(ctx context.Context) {
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logger := klog.FromContext(ctx)
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stopCh := ctx.Done()
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, compareSignal)
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go func() {
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for {
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select {
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case <-stopCh:
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return
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case <-ch:
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d.Comparer.Compare(logger)
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d.Dumper.DumpAll(logger)
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}
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}
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}()
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}
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