mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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87 lines
2.8 KiB
Go
87 lines
2.8 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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"fmt"
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"strings"
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"k8s.io/klog"
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"k8s.io/api/core/v1"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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internalcache "k8s.io/kubernetes/pkg/scheduler/internal/cache"
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"k8s.io/kubernetes/pkg/scheduler/internal/queue"
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)
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// CacheDumper writes some information from the scheduler cache and the scheduling queue to the
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// scheduler logs for debugging purposes.
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type CacheDumper struct {
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cache internalcache.Cache
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podQueue queue.SchedulingQueue
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}
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// DumpAll writes cached nodes and scheduling queue information to the scheduler logs.
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func (d *CacheDumper) DumpAll() {
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d.dumpNodes()
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d.dumpSchedulingQueue()
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}
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// dumpNodes writes NodeInfo to the scheduler logs.
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func (d *CacheDumper) dumpNodes() {
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dump := d.cache.Dump()
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klog.Info("Dump of cached NodeInfo")
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for _, nodeInfo := range dump.Nodes {
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klog.Info(d.printNodeInfo(nodeInfo))
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}
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}
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// dumpSchedulingQueue writes pods in the scheduling queue to the scheduler logs.
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func (d *CacheDumper) dumpSchedulingQueue() {
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pendingPods := d.podQueue.PendingPods()
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var podData strings.Builder
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for _, p := range pendingPods {
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podData.WriteString(printPod(p))
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}
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klog.Infof("Dump of scheduling queue:\n%s", podData.String())
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}
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// printNodeInfo writes parts of NodeInfo to a string.
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func (d *CacheDumper) printNodeInfo(n *framework.NodeInfo) string {
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var nodeData strings.Builder
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nodeData.WriteString(fmt.Sprintf("\nNode name: %+v\nRequested Resources: %+v\nAllocatable Resources:%+v\nScheduled Pods(number: %v):\n",
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n.Node().Name, n.RequestedResource(), n.AllocatableResource(), len(n.Pods())))
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// Dumping Pod Info
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for _, p := range n.Pods() {
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nodeData.WriteString(printPod(p.Pod))
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}
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// Dumping nominated pods info on the node
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nominatedPods := d.podQueue.NominatedPodsForNode(n.Node().Name)
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if len(nominatedPods) != 0 {
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nodeData.WriteString(fmt.Sprintf("Nominated Pods(number: %v):\n", len(nominatedPods)))
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for _, p := range nominatedPods {
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nodeData.WriteString(printPod(p))
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}
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}
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return nodeData.String()
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}
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// printPod writes parts of a Pod object to a string.
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func printPod(p *v1.Pod) string {
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return fmt.Sprintf("name: %v, namespace: %v, uid: %v, phase: %v, nominated node: %v\n", p.Name, p.Namespace, p.UID, p.Status.Phase, p.Status.NominatedNodeName)
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}
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