{"id":1957,"date":"2023-06-28T09:05:57","date_gmt":"2023-06-28T09:05:57","guid":{"rendered":"https:\/\/www.ipcpu.com\/?p=1957"},"modified":"2023-07-28T09:09:00","modified_gmt":"2023-07-28T09:09:00","slug":"k8s-pod-oom-killed","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2023\/06\/k8s-pod-oom-killed\/","title":{"rendered":"\u5982\u4f55\u51c6\u786e\u8bc6\u522bK8S\u4e2d\u7684PodOOMKilled\u5e76\u53d1\u51fa\u62a5\u8b66"},"content":{"rendered":"

\u5982\u4f55\u51c6\u786e\u8bc6\u522bK8S\u4e2d\u7684PodOOMKilled\u5e76\u53d1\u51fa\u62a5\u8b66<\/h1>\n

\u4e00\u3001\u5f15\u5b50<\/h2>\n

\u9886\u5bfc\u8981\u6c42K8S\u7cfb\u7edf\u4e2d\u53ea\u8981\u53d1\u73b0Pod\u5bb9\u5668\u88abOOMKilled\uff0c\u5c31\u8981\u53d1\u51fa\u62a5\u8b66\uff0c\u539f\u56e0\u662f\u5565\u5462\uff0c\u662f\u56e0\u4e3a\u9886\u5bfc\u53d1\u73b0\u6709\u4e9b\u6545\u969c\u603b\u662f\u4f1a\u4f34\u968f\u7740PodOOM\uff0c\u4e24\u8005\u4e4b\u95f4\u6709\u4e00\u5b9a\u7684\u5173\u8054\uff0c\u6240\u4ee5\u624d\u8981\u6c42\u62a5\u8b66\u53d1\u51fa\u6765\uff0c\u7ed9\u5927\u5bb6\u53c2\u8003\u4e0b\u3002<\/p>\n

\u597d\u5427\uff0c\u54b1\u4eec\u59d1\u4e14\u4e0d\u53bb\u8ba8\u8bbaPodOOM\u548c\u6545\u969c\u4e4b\u95f4\u7684\u5951\u5408\u5ea6\uff0c\u5355\u8bf4\u5982\u4f55\u5b9e\u73b0\u53d1\u751fPodOOM\u5c31\u62a5\u8b66\u628a\u3002<\/p>\n

\u4e8c\u3001\u8bd5\u6c34\uff0c\u4eceK8S\u81ea\u5e26\u7684\u76d1\u63a7\u5f00\u59cb<\/h2>\n

K8S\u81ea\u5e26\u76d1\u63a7\u9664\u4e86Master\u8282\u70b9\u4e0a\u7684\u7ec4\u4ef6\u548cEtcd\u7ec4\u4ef6\uff0c\u5c31\u53ea\u5269\u4e0b<\/p>\n

\n

job="kubelet"<\/p>\n

job="kube-state-metrics" <\/p>\n<\/blockquote>\n

kubelet\u662f\u8fd0\u884c\u5728Node\u8282\u70b9\uff0c\u76f4\u63a5\u63a7\u5236\u5bb9\u5668\u751f\u547d\u5468\u671f\u7684\uff0c\u53ef\u60dc\u8fd9\u91cc\u9762\u6ca1\u6709OOM\u76f8\u5173\u7684\u76d1\u63a7\u9879\u3002<\/p>\n

kube-state-metrics\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u7ec4\u4ef6\uff0c\u7528\u6765\u7edf\u8ba1Service\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u8fd9\u91cc\u9762\u53d1\u73b0\u6709OOM\u76f8\u5173\u5185\u5bb9<\/p>\n

kube_pod_container_status_last_terminated_reason{reason="OOMKilled"}<\/code><\/pre>\n
\u4e8e\u662f\u6211\u4eec\u628a\u8fd9\u4e2a\u76d1\u63a7\u52a0\u5230\u76d1\u63a7\u7cfb\u7edf\u91cc\uff0c\u7ed3\u679c\u8fd0\u884c\u4e86\u4e00\u6bb5\u65f6\u95f4\u53d1\u73b0\u95ee\u9898\u4e86\uff0c\u5f53K8S\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8fd9\u4e2a\u62a5\u8b66\u4e0d\u4f1a\u89e6\u53d1\uff0c\u6216\u8005\u5341\u6b21OOM\u53ea\u80fd\u89e6\u53d1\u4e00\u6b21\u5427\u3002<\/p>\n
\u4e00\u5f00\u59cb\u6211\u4eec\u4ee5\u4e3a\u662f\u6211\u4eec\u7684\u91c7\u96c6\u5468\u671f\u8fc7\u957f\uff0c\u8fd9\u4e2a\u72b6\u6001\u53d8\u5316\u592a\u5feb\uff0c\u6211\u4eec\u8fd8\u6ca1\u6709\u91c7\u96c6\uff0c\u4ed6\u7684\u72b6\u6001\u5c31\u53d8\u4e86\uff0c\u540e\u6765\u7ffb\u9605\u4e86\u4e00\u4e9b\u8d44\u6599\u53d1\u73b0\uff0c\u5e76\u4e0d\u662f\u5982\u6b64\uff0c\u800c\u662f [\u53c2\u8003\u8d44\u65991]<\/p>\n
\u53ea\u6709\u5f53pid\u4e3a1\u7684\u7a0b\u5e8f\u4e3aOOM-killer\u6740\u6b7b\u65f6\uff0cContainers\u624d\u4f1a\u88ab\u6807\u8bb0\u4e3aOOM killed<\/em><\/p>\n
\u597d\u5427\uff0c\u8fd9\u6761\u8def\u8d70\u4e0d\u901a\u3002<\/p>\n
\u4e09\u3001\u8fd4\u5de5\uff0c\u4eceOOM\u539f\u7406\u5165\u624b<\/h2>\n
\u6211\u4eec\u53ea\u80fd\u4ece\u5176\u4ed6\u65b9\u9762\u8003\u8651\uff0c\u6211\u4eec\u4eceOOM\u539f\u7406\u5165\u624b\u4e86\uff1a<\/p>\n
OOM Killer\u662fLinux\u5185\u6838\u5728\u7cfb\u7edf\u5185\u5b58\u4e25\u91cd\u4e0d\u8db3\u65f6\uff0c\u5f3a\u884c\u91ca\u653e\u8fdb\u7a0b\u5185\u5b58\u7684\u4e00\u79cd\u673a\u5236\uff0c\u8fd9\u4e2a\u662f\u7cfb\u7edf\u7ea7\u522b\u7684\u3002\u5728\u5f15\u5165cgroup\u4ee5\u540e\uff0ccgroup\u4e5f\u6709\u7c7b\u4f3c\u7684OOM Killer\uff0c\u4f46\u662f\u8fd9\u4e2a\u53ea\u80fd\u63a7\u5236cgroup\u7ec4\u5185\u7684OOM Killer\uff0c\u4e0d\u80fdkill\u5176\u4ed6group\u9009\u8282\u70b9\u4e0a\u7684\u8fdb\u7a0b\u3002<\/p>\n
\u5f53\u6211\u4eec\u521b\u5efa1\u4e2a\u670d\u52a1\u65f6\uff0ckubelet\u4f1a\u5728Node\u8282\u70b9\u521b\u5efa1\u4e2a\u5bb9\u5668Pod\uff0c\u5e76\u5c06limit\u5185\u5b58\u9650\u5236\u5199\u5165\u5230cgroup\u4e2d\uff0c\u5f53\u8fd9\u4e2aPod\u4f7f\u7528\u7684\u5185\u5b58\u8d85\u8fc7\u4e86cgroup\u4e2d\u7684\u9650\u5236\u503c\uff0c\u5c31\u4f1a\u89e6\u53d1cgroup\u7ec4\u5185\u7684OOM Killer\uff0c\u5c06\u8fdb\u7a0b\u6740\u6b7b\u3002<\/p>\n
\u7531\u4e8e\u8fd9\u4e2a\u673a\u5236\u65f6cgroup\u7684\uff0c\u56e0\u6b64\u8fd9\u4e2a\u64cd\u4f5c\u4e0d\u4f1a\u901a\u77e5kubelet\uff0ckubelet\u4e5f\u65e0\u6cd5\u611f\u77e5\u5230\uff0c\u4f46\u662fkubelet\u672c\u8eab\u6709\u673a\u5236\u4f1a\u81ea\u52a8\u62c9\u8d77\u3002<\/p>\n
\u56db\u3001\u6df1\u6316\uff0cdmesg\u7684\u62a5\u8b66\u5185\u5bb9<\/h2>\n
\u5f53Pod\u88abOOM Killer\u6740\u6b7b\u4ee5\u540e\uff0c\u4f1a\u5728\u7cfb\u7edf\u65e5\u5fd7\u4e2d\u5199\u4e00\u4e9b\u65e5\u5fd7\uff0c\u9ed8\u8ba4\u662f\u5199\u5165\u5230 \/dev\/kmsg \u4e2d\uff0c\u8fd9\u4e2a\u6587\u4ef6\u9700\u8981\u7528dmesg \u547d\u4ee4\u8bfb\u53d6\uff0c\u4f7f\u7528dmesg -T\u53c2\u6570\u53ef\u4ee5\u5728\u9996\u884c\u6253\u5370\u65f6\u95f4\u4fe1\u606f\u3002<\/p>\n
\u8fd9\u4e2aOOM Killer\u7684\u62a5\u9519\u4fe1\u606f\u4f1a\u968f\u7740\u7cfb\u7edf\u5185\u6838\u7248\u672c\u7684\u53d8\u5316\uff0c\u4e5f\u5728\u4e0d\u65ad\u7684\u53d8\u5316\uff0c\u76ee\u524d\u6211\u4eec\u6536\u96c6\u5230\u4e86\u4ee5\u4e0b\u51e0\u4e2a\u5185\u6838\u7248\u672c\u7684OOM\u4fe1\u606f\u3002<\/p>\n
## Kernel 3.10\u7248\u672cOOM\u62a5\u9519\n\nTask in \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-podf01c1049_ebf4_4b9d_b04c_345e8da5d1a8.slice\/docker-15bbd7bed86af66837bb4e3b6d2e08802a23f31df45aefc60daa81f5a12896b5.scope killed as a result of limit of \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-podf01c1049_ebf4_4b9d_b04c_345e8da5d1a8.slice\n\n## Kernel 4.19\u7248\u672cOOM\u62a5\u9519\n\nTask in \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-pod9693eb91_d071_4564_895b_fc504afa8f00.slice\/docker-1d4c8e1115f9c33504d278db21e17189f8cdd1ad6b794a4557b5f910cb78ea4b.scope killed as a result of limit of \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-pod9693eb91_d071_4564_895b_fc504afa8f00.slice\n\n## Kernel 5.4\u7248\u672cOOM\u62a5\u9519\n\noom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=a2172e8d1101b4393d934a3a3fb902260c945c360ed278bbdef80cb45fbb9419,mems_allowed=0-1,oom_memcg=\/kubepods\/burstable\/pod3962896b-ab69-4572-8f1d-ee756f9f3589,task_memcg=\/kubepods\/burstable\/pod3962896b-ab69-4572-8f1d-ee756f9f3589\/a2172e8d1101b4393d934a3a3fb902260c945c360ed278bbdef80cb45fbb9419,task=memc,pid=387602,uid=0\n\n## Kernel 5.10\u7248\u672cOOM\u62a5\u9519\n\noom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=cri-containerd-db82d879ba5185c931261d7544272174ec1368150C41457418C844974.scope,mems_allowed=0,oom_memcg=\/kubends.slice\/kubepods-burstable.slice\/kubepods-bustable-pod748bebc7_7fde_4fef_b2a3_fe45e29392df.slice,task_memcg=\/kubends.slice\/kubepods-burstable.slice\/kubepods-bustable-pod748bebc7_7fde_4fef_b2a3_fe45e29392df.slice\/cri-containerd-ab82a879ba5185c93126175448c72174ec1368158c4d45718cfb8b84df97d6.scope,task=memc,pid=26036,uid=8<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4fe1\u606f\u91cc\u9762\uff0c\u6211\u4eec\u53ef\u4ee5\u62ff\u5230\u88abKill\u7684\u8fdb\u7a0bPID\uff0c\u8fdb\u7a0b\u540d\u79f0\u7b49\u4fe1\u606f\uff0c\u4f46\u5176\u5b9e\u6700\u91cd\u8981\u7684\u662fPOD\u5bb9\u5668\u7684UUID\u4fe1\u606f(3962896b-ab69-4572-8f1d-ee756f9f3589)\u4e5f\u5728\u8fd9\u91cc\u9762\uff0c\u540e\u9762\u7684\u7ae0\u8282\u4f1a\u4ecb\u7ecd\uff0c\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u662f\u4e0d\u540c\u7248\u672c\u7684UUID\u63cf\u8ff0\u4e0d\u4e00\u6837\uff0c\u6709\u7684\u662f\u4e0b\u5212\u7ebf\u8fde\u63a5\uff0c\u6709\u7684\u662f\u4e2d\u6a2a\u7ebf\u8fde\u63a5\u3002<\/p>\n
\u4e94\u3001\u5b9e\u73b0\uff0c\u4f46\u6709\u6240\u9057\u61be\u7684NPD<\/h2>\n
\u5bf9\u4e8eNode\u8282\u70b9\u7cfb\u7edf \/dev\/kmsg \u6587\u4ef6\u7684\u76d1\u63a7\uff0cKubenertes\u5b98\u65b9\u662f\u6709\u5de5\u5177\u7684\uff0c\u53ebNPD(node-problem-detector)\uff0c\u94fe\u63a5\u5982\u4e0b<\/p>\n
\u2003https:\/\/github.com\/kubernetes\/node-problem-detector<\/a><\/p>\n
\u8fd9\u4e2a\u5de5\u5177\u4f1a\u76d1\u63a7\/dev\/kmsg \u6587\u4ef6\u7684\u62a5\u9519\u4fe1\u606f\u3001Docker\u8fdb\u7a0b\u662f\u5426\u5b58\u5728\u7b49\u4fe1\u606f\uff0c\u7136\u540e\u5c06\u53d1\u73b0\u7684\u95ee\u9898\u4ee5Event\u5f62\u5f0f\u4e0a\u62a5\u7ed9 K8S\u7684apiserver\uff0c\u8fd9\u6837\u4f7f\u7528 kubectl get event \u5c31\u53ef\u4ee5\u770b\u5230\u5bf9\u5e94\u7684\u4fe1\u606f\u4e86\u3002<\/p>\n
\u4f46\u662f\u5462\uff0c\u5b98\u65b9\u7684\u8fd9\u4e2anpd\u6709\u5f88\u5927\u7684\u7f3a\u9677\uff0c\u90a3\u5c31\u662f\u62ff\u4e0d\u5230\u88abKill\u7684\u5bb9\u5668\u540d\u79f0\uff0c\u8fd9\u4e2a\u5f88\u91cd\u8981\uff0c\u5982\u679c\u6ca1\u6709\u5bb9\u5668\u540d\u79f0\uff0c\u53ea\u6709pid\u7684\u8bdd\uff0c\u6839\u672c\u65e0\u6cd5\u6392\u67e5\uff0c\u5e76\u4e14POD\u88abKill\u4e86\uff0c\u6839\u672c\u627e\u4e0d\u5bf9\u5bf9\u5e94\u5173\u7cfb\u3002<\/p>\n
\u597d\u5728\u963f\u91cc\u4e91\u5728\u5b83\u81ea\u8eab\u7684Kubernetes\u670d\u52a1\u4e2d\u63d0\u4f9b\u4e86\u589e\u5f3a\u7248npd\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u83b7\u53d6\u5bb9\u5668\u540d\u79f0\u7684\u529f\u80fd\u3002<\/p>\n
\u516d\u3001\u5173\u8054\uff0cUUID\u5982\u4f55\u5173\u8054Pod\u540d\u79f0<\/h2>\n
\u6211\u4eec\u5728\u7b2c\u56db\u90e8\u5206\u8bf4\uff0cOOM\u7684\u62a5\u9519\u4fe1\u606f\u662f\u5305\u542bPOD\u5bb9\u5668\u7684UUID\u4fe1\u606f\u7684\u3002<\/p>\n
\u5728 K8s \u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u90fd\u6709\u81ea\u5df1\u7684 UID\uff08\u5176\u5b9e\u5c31\u662fUUID\uff09\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u81ea\u5df1\uff0c\u6bd4\u5982 Pod\u3001ConfigMap \u7b49\u5bf9\u8c61\u7684 metadata \u5185\u90fd\u6709\u4e00\u4e2a\u53eb\u505a uid \u7684\u5b57\u6bb5\u3002\u4e3a\u4ec0\u4e48\u8981\u6709\u8fd9\u4e2a\u5b57\u6bb5\u5462\uff1f\u56e0\u4e3a\u4ec5\u9760 kind\/namespace\/name \u662f\u6ca1\u529e\u6cd5\u786e\u5b9a\u5b9e\u4f8b\u8fd8\u662f\u90a3\u4e2a\u5b9e\u4f8b\u7684\uff0c\u6bd4\u5982\u5b9e\u4f8b\u88ab\u91cd\u5efa\uff0ckind\/namespace\/name \u7b49\u4fe1\u606f\u5e76\u4e0d\u4f1a\u53d8\u5316\uff0c\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u4f7f\u7528 UID \u6765\u5224\u65ad\u300c\u4f60\u8fd8\u662f\u4e0d\u662f\u539f\u6765\u7684\u4f60\u4e86\u300d\u3002<\/p>\n
\u5728K8S\u4e2d\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u67e5\u770bPOD\u7684UUID\u4fe1\u606f<\/p>\n
# kubectl get pods -n project-1780 -o custom-columns=PodName:.metadata.name,PodUID:.metadata.uid\nPodName                          PodUID\nservice-12520-988868dfd-gzjsw    af5181dd-e9bd-4b8f-ac41-dc857c3db9d0<\/code><\/pre>\n
\u5f53\u7136\u8fd9\u4e9b\u4fe1\u606f\u53ef\u4ee5\u901a\u8fc7apiserver\u83b7\u5f97\uff0c\u6211\u4eec\u7ffb\u770b\u4e86\u963f\u91cc\u4e91npd\u7684\u4ee3\u7801<\/p>\n
https:\/\/github.com\/AliyunContainerService\/node-problem-detector\/tree\/alibabacloud-release\/v0.8.12<\/a><\/p>\n
\/\/ pkg\/systemlogmonitor\/log_monitor.go \u7b2c370\u884c\u5f00\u59cb\n\/\/ listPodAndCache list pods on this node, find pod with pod uuid.\nfunc (l *logMonitor) listPodAndCache() error {\n    doneChan := make(chan bool)\n    defer close(doneChan)\n    statisticStartTime := time.Now().UnixNano()\n    pl, err := k8sClient.CoreV1().Pods("").List(metav1.ListOptions{\n        ResourceVersion: "0",\n        FieldSelector:   fmt.Sprintf("spec.nodeName=%s", nodeName),\n    })\n    statisticEndListPodTime := time.Now().UnixNano()\n    glog.Infof("listPod spend time: %v ms, startTime: %v nanoTimestamp, endTime: %v nanoTimestamp", (statisticEndListPodTime-statisticStartTime)\/1e6, statisticStartTime, statisticEndListPodTime)\n    if err != nil {\n        glog.Error("Error in listing pods, error: %v", err.Error())\n        return err\n    }<\/code><\/pre>\n
\u7136\u540e\u8fd8\u53d1\u73b0\u4e86\uff0c\u4f7f\u7528UUID\u53bb\u5339\u914dPOD\u540d\u79f0\u7684\u4ee3\u7801\u3002<\/p>\n
            \/\/ 1.1 cache dirty, try re cache\n            err := l.listPodAndCache()\n            if err != nil {\n                glog.Errorf("pod oom found, list and cache pod list error. pod uuid: %v, error: %v, cache value: %v", uuid, err, cacheVal)\n            }\n            if cacheVal, ok := l.cache.Get(uuid); ok {\n                podName, namespace := parseCache(uuid, cacheVal.(string))\n                glog.V(9).Infof("pod oom hit pod list cache. podName: %v, namespace: %v", podName, namespace)\n                if podName != "" {\n                    return generatePodOOMEventMessage(podName, uuid, namespace, nodeName)\n                } else {\n                    glog.Errorf("pod oom found, but pod parse cache error. pod uuid: %v, cache value: %v", uuid, cacheVal)\n                }\n            } else {\n                glog.Errorf("pod oom found, but pod get cache error. pod uuid: %v, cache value: %v", uuid, cacheVal)\n            }<\/code><\/pre>\n
\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\u5c31\u662f\u521a\u521a\u8bf4\u7684\uff0cUUID\u7684\u83b7\u53d6\uff0c\u5f53\u524d\u963f\u91cc\u7684\u7248\u672c\u6ca1\u6709\u8003\u8651\u5230\u4f7f\u7528\u4e2d\u6a2a\u7ebf\u8fde\u63a5UUID\u7684\u60c5\u51b5\uff0c\u5bfc\u81f45.4\u5185\u6838\u7248\u672c\u62ff\u4e0d\u5230UUID\uff0c\u4e0d\u4ec5\u5982\u6b64\uff0c\u963f\u91cc\u7684\u7248\u672c\u57285.4\u4e5f\u5b58\u5728\u6b63\u5219\u5339\u914d\u7684\u95ee\u9898\uff0c\u5982\u679c\u4f60\u4e0d\u5e78\u4f7f\u7528\u4e865.4\u7248\u672c\uff0c\u90fd\u9700\u8981\u81ea\u884c\u4fee\u6539\u4ee3\u7801\u9002\u914d\u3002<\/p>\n
\u6211\u628a\u6211\u7684NPD\u90e8\u7f72\u7684YAML\u653e\u5728\u4e86github\uff0c\u5927\u5bb6\u53ef\u4ee5\u53c2\u8003\u4e0b\u3002 <\/p>\n
https:\/\/github.com\/ipcpu\/npd-yaml\/blob\/main\/npd.yaml<\/a> <\/p>\n
\u4e03\u3001\u62a5\u8b66\uff0c\u6c34\u5230\u6e20\u6210<\/h2>\n
\u6709\u4e86NPD\u6a21\u5757\uff0c\u6211\u4eec\u4f7f\u7528K8S\u7684eventrouter\u529f\u80fd\u5c31\u53ef\u4ee5\u53d1\u5230\u7edf\u4e00\u6c47\u603b\u7684\u5730\u5740\u4e86\uff0c\u8fd9\u91cc\u6211\u4eec\u662f\u8f93\u51fa\u5230kafka\uff0c\u7136\u540e\u6254\u8fdb\u4e86\u963f\u91cc\u7684SLS\uff0c\u4f7f\u7528\u4e86\u963f\u91cc\u4e91SLS\u62a5\u8b66\u7cfb\u7edf\u3002<\/p>\n
\u7ec8\u4e8e\u5b9e\u73b0\u4e86\u62a5\u8b66\uff0c\u8fc7\u7a0b\u592a\u66f2\u6298\u4e86\uff0c\u7279\u522b\u662f\u4e0d\u540c\u7684\u5185\u6838\u7248\u672cOOM\u62a5\u9519\u4fe1\u606f\u4e0d\u4e00\u6837\uff0c\u7ed9\u6211\u4eec\u9020\u6210\u4e86\u5f88\u591a\u56f0\u96be\u3002<\/p>\n
\u53c2\u8003\u8d44\u6599<\/h2>\n
https:\/\/zhoushuke.github.io\/2023\/02\/09\/Kubernetes-Out-Of-Memory-1\/<\/a>
\nhttps:\/\/learn.lianglianglee.com\/%E4%B8%93%E6%A0%8F\/%E5%AE%B9%E5%99%A8%E5%AE%9E%E6%88%98%E9%AB%98%E6%89%8B%E8%AF%BE\/08%20%E5%AE%B9%E5%99%A8%E5%86%85%E5%AD%98%EF%BC%9A%E6%88%91%E7%9A%84%E5%AE%B9%E5%99%A8%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A2%AB%E6%9D%80%E4%BA%86%EF%BC%9F.md<\/a><\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aIPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> » \u5982\u4f55\u51c6\u786e\u8bc6\u522bK8S\u4e2d\u7684PodOOMKilled\u5e76\u53d1\u51fa\u62a5\u8b66<\/a><\/p>","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u51c6\u786e\u8bc6\u522bK8S\u4e2d\u7684PodOOMKilled\u5e76\u53d1\u51fa\u62a5\u8b66 \u4e00\u3001\u5f15\u5b50 \u9886\u5bfc\u8981\u6c42K8S\u7cfb\u7edf\u4e2d\u53ea\u8981\u53d1\u73b0Pod\u5bb9\u5668\u88abOOMKilled\uff0c\u5c31\u8981\u53d1\u51fa\u62a5\u8b66\uff0c\u539f\u56e0\u662f\u5565\u5462\uff0c\u662f\u56e0\u4e3a\u9886\u5bfc\u53d1\u73b0\u6709\u4e9b\u6545\u969c\u603b\u662f\u4f1a\u4f34\u968f\u7740PodOOM\uff0c\u4e24\u8005\u4e4b\u95f4\u6709\u4e00\u5b9a\u7684\u5173\u8054\uff0c\u6240\u4ee5\u624d\u8981\u6c42\u62a5\u8b66\u53d1\u51fa\u6765\uff0c\u7ed9\u5927\u5bb6\u53c2\u8003\u4e0b\u3002 \u597d\u5427\uff0c\u54b1\u4eec\u59d1\u4e14\u4e0d\u53bb\u8ba8\u8bbaPodOOM\u548c\u6545\u969c\u4e4b\u95f4\u7684\u5951\u5408\u5ea6\uff0c\u5355\u8bf4\u5982\u4f55\u5b9e\u73b0\u53d1\u751fPodOOM\u5c31\u62a5\u8b66\u628a\u3002 \u4e8c\u3001\u8bd5\u6c34\uff0c\u4eceK8S\u81ea\u5e26\u7684\u76d1\u63a7\u5f00\u59cb K8S\u81ea\u5e26\u76d1\u63a7\u9664\u4e86Master\u8282\u70b9\u4e0a\u7684\u7ec4\u4ef6\u548cEtcd\u7ec4\u4ef6\uff0c\u5c31\u53ea\u5269\u4e0b job="kubelet" job="kube-state-metrics" kubelet\u662f\u8fd0\u884c\u5728Node\u8282\u70b9\uff0c\u76f4\u63a5\u63a7\u5236\u5bb9\u5668\u751f\u547d\u5468\u671f\u7684\uff0c\u53ef\u60dc\u8fd9\u91cc\u9762\u6ca1\u6709OOM\u76f8\u5173\u7684\u76d1\u63a7\u9879\u3002 kube-state-metrics\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u7ec4\u4ef6\uff0c\u7528\u6765\u7edf\u8ba1Service\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u8fd9\u91cc\u9762\u53d1\u73b0\u6709OOM\u76f8\u5173\u5185\u5bb9 kube_pod_container_status_last_terminated_reason{reason="OOMKilled"} \u4e8e\u662f\u6211\u4eec\u628a\u8fd9\u4e2a\u76d1\u63a7\u52a0\u5230\u76d1\u63a7\u7cfb\u7edf\u91cc\uff0c\u7ed3\u679c\u8fd0\u884c\u4e86\u4e00\u6bb5\u65f6\u95f4\u53d1\u73b0\u95ee\u9898\u4e86\uff0c\u5f53K8S\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8fd9\u4e2a\u62a5\u8b66\u4e0d\u4f1a\u89e6\u53d1\uff0c\u6216\u8005\u5341\u6b21OOM\u53ea\u80fd\u89e6\u53d1\u4e00\u6b21\u5427\u3002 \u4e00\u5f00\u59cb\u6211\u4eec\u4ee5\u4e3a\u662f\u6211\u4eec\u7684\u91c7\u96c6\u5468\u671f\u8fc7\u957f\uff0c\u8fd9\u4e2a\u72b6\u6001\u53d8\u5316\u592a\u5feb\uff0c\u6211\u4eec\u8fd8\u6ca1\u6709\u91c7\u96c6\uff0c\u4ed6\u7684\u72b6\u6001\u5c31\u53d8\u4e86\uff0c\u540e\u6765\u7ffb\u9605\u4e86\u4e00\u4e9b\u8d44\u6599\u53d1\u73b0\uff0c\u5e76\u4e0d\u662f\u5982\u6b64\uff0c\u800c\u662f [\u53c2\u8003\u8d44\u65991] \u53ea\u6709\u5f53pid\u4e3a1\u7684\u7a0b\u5e8f\u4e3aOOM-killer\u6740\u6b7b\u65f6\uff0cContainers\u624d\u4f1a\u88ab\u6807\u8bb0\u4e3aOOM killed \u597d\u5427\uff0c\u8fd9\u6761\u8def\u8d70\u4e0d\u901a\u3002 \u4e09\u3001\u8fd4\u5de5\uff0c\u4eceOOM\u539f\u7406\u5165\u624b \u6211\u4eec\u53ea\u80fd\u4ece\u5176\u4ed6\u65b9\u9762\u8003\u8651\uff0c\u6211\u4eec\u4eceOOM\u539f\u7406\u5165\u624b\u4e86\uff1a OOM Killer\u662fLinux\u5185\u6838\u5728\u7cfb\u7edf\u5185\u5b58\u4e25\u91cd\u4e0d\u8db3\u65f6\uff0c\u5f3a\u884c\u91ca\u653e\u8fdb\u7a0b\u5185\u5b58\u7684\u4e00\u79cd\u673a\u5236\uff0c\u8fd9\u4e2a\u662f\u7cfb\u7edf\u7ea7\u522b\u7684\u3002\u5728\u5f15\u5165cgroup\u4ee5\u540e\uff0ccgroup\u4e5f\u6709\u7c7b\u4f3c\u7684OOM Killer\uff0c\u4f46\u662f\u8fd9\u4e2a\u53ea\u80fd\u63a7\u5236cgroup\u7ec4\u5185\u7684OOM Killer\uff0c\u4e0d\u80fdkill\u5176\u4ed6group\u9009\u8282\u70b9\u4e0a\u7684\u8fdb\u7a0b\u3002 \u5f53\u6211\u4eec\u521b\u5efa1\u4e2a\u670d\u52a1\u65f6\uff0ckubelet\u4f1a\u5728Node\u8282\u70b9\u521b\u5efa1\u4e2a\u5bb9\u5668Pod\uff0c\u5e76\u5c06limit\u5185\u5b58\u9650\u5236\u5199\u5165\u5230cgroup\u4e2d\uff0c\u5f53\u8fd9\u4e2aPod\u4f7f\u7528\u7684\u5185\u5b58\u8d85\u8fc7\u4e86cgroup\u4e2d\u7684\u9650\u5236\u503c\uff0c\u5c31\u4f1a\u89e6\u53d1cgroup\u7ec4\u5185\u7684OOM Killer\uff0c\u5c06\u8fdb\u7a0b\u6740\u6b7b\u3002 \u7531\u4e8e\u8fd9\u4e2a\u673a\u5236\u65f6cgroup\u7684\uff0c\u56e0\u6b64\u8fd9\u4e2a\u64cd\u4f5c\u4e0d\u4f1a\u901a\u77e5kubelet\uff0ckubelet\u4e5f\u65e0\u6cd5\u611f\u77e5\u5230\uff0c\u4f46\u662fkubelet\u672c\u8eab\u6709\u673a\u5236\u4f1a\u81ea\u52a8\u62c9\u8d77\u3002 \u56db\u3001\u6df1\u6316\uff0cdmesg\u7684\u62a5\u8b66\u5185\u5bb9 \u5f53Pod\u88abOOM Killer\u6740\u6b7b\u4ee5\u540e\uff0c\u4f1a\u5728\u7cfb\u7edf\u65e5\u5fd7\u4e2d\u5199\u4e00\u4e9b\u65e5\u5fd7\uff0c\u9ed8\u8ba4\u662f\u5199\u5165\u5230 \/dev\/kmsg \u4e2d\uff0c\u8fd9\u4e2a\u6587\u4ef6\u9700\u8981\u7528dmesg \u547d\u4ee4\u8bfb\u53d6\uff0c\u4f7f\u7528dmesg -T\u53c2\u6570\u53ef\u4ee5\u5728\u9996\u884c\u6253\u5370\u65f6\u95f4\u4fe1\u606f\u3002 \u8fd9\u4e2aOOM Killer\u7684\u62a5\u9519\u4fe1\u606f\u4f1a\u968f\u7740\u7cfb\u7edf\u5185\u6838\u7248\u672c\u7684\u53d8\u5316\uff0c\u4e5f\u5728\u4e0d\u65ad\u7684\u53d8\u5316\uff0c\u76ee\u524d\u6211\u4eec\u6536\u96c6\u5230\u4e86\u4ee5\u4e0b\u51e0\u4e2a\u5185\u6838\u7248\u672c\u7684OOM\u4fe1\u606f\u3002 ## Kernel 3.10\u7248\u672cOOM\u62a5\u9519 Task in \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-podf01c1049_ebf4_4b9d_b04c_345e8da5d1a8.slice\/docker-15bbd7bed86af66837bb4e3b6d2e08802a23f31df45aefc60daa81f5a12896b5.scope killed as a result of limit of \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-podf01c1049_ebf4_4b9d_b04c_345e8da5d1a8.slice ## Kernel 4.19\u7248\u672cOOM\u62a5\u9519 Task in \/kubepods.slice\/kubepods-burstable.slice\/kubepods-burstable-pod9693eb91_d071_4564_895b_fc504afa8f00.slice\/docker-1d4c8e1115f9c33504d278db21e17189f8cdd1ad6b794a4557b5f910cb78ea4b.scope […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[173],"_links":{"self":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1957"}],"collection":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/comments?post=1957"}],"version-history":[{"count":2,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1957\/revisions"}],"predecessor-version":[{"id":1960,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/1957\/revisions\/1960"}],"wp:attachment":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/media?parent=1957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/categories?post=1957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/tags?post=1957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}