| /* |
| Copyright 2018 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package debugger |
| |
| import ( |
| "fmt" |
| "strings" |
| |
| "k8s.io/klog" |
| |
| "k8s.io/api/core/v1" |
| "k8s.io/kubernetes/pkg/scheduler/cache" |
| internalcache "k8s.io/kubernetes/pkg/scheduler/internal/cache" |
| "k8s.io/kubernetes/pkg/scheduler/internal/queue" |
| ) |
| |
| // CacheDumper writes some information from the scheduler cache and the scheduling queue to the |
| // scheduler logs for debugging purposes. |
| type CacheDumper struct { |
| cache internalcache.Cache |
| podQueue queue.SchedulingQueue |
| } |
| |
| // DumpAll writes cached nodes and scheduling queue information to the scheduler logs. |
| func (d *CacheDumper) DumpAll() { |
| d.dumpNodes() |
| d.dumpSchedulingQueue() |
| } |
| |
| // dumpNodes writes NodeInfo to the scheduler logs. |
| func (d *CacheDumper) dumpNodes() { |
| snapshot := d.cache.Snapshot() |
| klog.Info("Dump of cached NodeInfo") |
| for _, nodeInfo := range snapshot.Nodes { |
| klog.Info(printNodeInfo(nodeInfo)) |
| } |
| } |
| |
| // dumpSchedulingQueue writes pods in the scheduling queue to the scheduler logs. |
| func (d *CacheDumper) dumpSchedulingQueue() { |
| waitingPods := d.podQueue.WaitingPods() |
| var podData strings.Builder |
| for _, p := range waitingPods { |
| podData.WriteString(printPod(p)) |
| } |
| klog.Infof("Dump of scheduling queue:\n%s", podData.String()) |
| } |
| |
| // printNodeInfo writes parts of NodeInfo to a string. |
| func printNodeInfo(n *cache.NodeInfo) string { |
| var nodeData strings.Builder |
| nodeData.WriteString(fmt.Sprintf("\nNode name: %+v\nRequested Resources: %+v\nAllocatable Resources:%+v\nNumber of Pods: %v\nPods:\n", |
| n.Node().Name, n.RequestedResource(), n.AllocatableResource(), len(n.Pods()))) |
| // Dumping Pod Info |
| for _, p := range n.Pods() { |
| nodeData.WriteString(printPod(p)) |
| } |
| return nodeData.String() |
| } |
| |
| // printPod writes parts of a Pod object to a string. |
| func printPod(p *v1.Pod) string { |
| 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) |
| } |