├── LICENSE ├── README.md ├── config ├── abrt-adaptor.json ├── docker-monitor.json ├── kernel-monitor-counter.json └── kernel-monitor.json ├── init-configmap.sh ├── npd.yaml └── uninstall-npd.sh /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. 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Initialize configmap for npd config and plugin 7 | 8 | 9 | ``` 10 | # make sure you have install kubectl and has configured to connect to your kubernetes cluster 11 | 12 | git clone https://github.com/vipdocker/npd-centos.git 13 | cd npd-centos 14 | chmod +x init-configmap.sh 15 | ./init-configmap.sh 16 | ``` 17 | 18 | 2. Install node problem detector as daemonset 19 | 20 | ``` 21 | # only the worker node will deploy the node problem detector 22 | kubectl create -f npd.yaml 23 | ``` 24 | 25 | 3. Verfiy node problem dectector is working well 26 | 27 | - Make sure the node problem detector has running 28 | - Check the npd log, something like below 29 | 30 | ``` 31 | I1009 11:52:45.311135 7 log_watchers.go:40] Use log watcher of plugin "journald" 32 | I1009 11:52:45.311798 7 log_monitor.go:73] Start log monitor 33 | I1009 11:52:45.313032 7 log_watcher.go:69] Start watching journald 34 | I1009 11:52:45.313066 7 log_monitor.go:73] Start log monitor 35 | I1009 11:52:45.313373 7 log_watcher.go:69] Start watching journald 36 | I1009 11:52:45.313421 7 problem_detector.go:73] Problem detector started 37 | I1009 11:52:45.313340 7 log_monitor.go:170] Initialize condition generated: [{Type:KernelDeadlock Status:False Transition:2018-10-09 11:52:45.313264794 +0800 CST m=+0.095167151 Reason:KernelHasNoDeadlock Message:kernel has no deadlock}] 38 | I1009 11:52:45.313447 7 log_monitor.go:170] Initialize condition generated: [] 39 | ``` 40 | 41 | - Send a journl message to simulate the docker daemon blocker 42 | ``` 43 | echo "task docker:7 blocked for more than 300 seconds." |systemd-cat -t kernel 44 | ``` 45 | 46 | - Check the corresponding node has the Kernel deadlock=true conditioin 47 | 48 | ### Uninstall NPD 49 | 50 | ``` 51 | chmod +x uninstall-npd.sh 52 | ./uninstall-npd.sh 53 | ``` 54 | -------------------------------------------------------------------------------- /config/abrt-adaptor.json: -------------------------------------------------------------------------------- 1 | { 2 | "plugin": "journald", 3 | "pluginConfig": { 4 | "source": "abrt-notification" 5 | }, 6 | "logPath": "/var/log/journal", 7 | "lookback": "5m", 8 | "bufferSize": 10, 9 | "source": "abrt-adaptor", 10 | "conditions": [], 11 | "rules": [ 12 | { 13 | "type": "temporary", 14 | "reason": "CCPPCrash", 15 | "pattern": "Process \\d+ \\(\\S+\\) crashed in .*" 16 | }, 17 | { 18 | "type": "temporary", 19 | "reason": "UncaughtException", 20 | "pattern": "Process \\d+ \\(\\S+\\) of user \\d+ encountered an uncaught \\S+ exception" 21 | }, 22 | { 23 | "type": "temporary", 24 | "reason": "XorgCrash", 25 | "pattern": "Display server \\S+ crash in \\S+" 26 | }, 27 | { 28 | "type": "temporary", 29 | "reason": "VMcore", 30 | "pattern": "System encountered a fatal error in \\S+" 31 | }, 32 | { 33 | "type": "temporary", 34 | "reason": "Kerneloops", 35 | "pattern": "System encountered a non-fatal error in \\S+" 36 | } 37 | ] 38 | } 39 | -------------------------------------------------------------------------------- /config/docker-monitor.json: -------------------------------------------------------------------------------- 1 | { 2 | "plugin": "journald", 3 | "pluginConfig": { 4 | "source": "docker" 5 | }, 6 | "logPath": "/var/log/journal", 7 | "lookback": "5m", 8 | "bufferSize": 10, 9 | "source": "docker-monitor", 10 | "conditions": [], 11 | "rules": [ 12 | { 13 | "type": "temporary", 14 | "reason": "CorruptDockerImage", 15 | "pattern": "Error trying v2 registry: failed to register layer: rename /var/lib/docker/image/(.+) /var/lib/docker/image/(.+): directory not empty.*" 16 | } 17 | ] 18 | } 19 | -------------------------------------------------------------------------------- /config/kernel-monitor-counter.json: -------------------------------------------------------------------------------- 1 | { 2 | "plugin": "custom", 3 | "pluginConfig": { 4 | "invoke_interval": "5m", 5 | "timeout": "1m", 6 | "max_output_length": 80, 7 | "concurrency": 1 8 | }, 9 | "source": "kernel-monitor", 10 | "conditions": [ 11 | { 12 | "type": "FrequentUnregisterNetDevice", 13 | "reason": "NoFrequentUnregisterNetDevice", 14 | "message": "node is functioning properly" 15 | } 16 | ], 17 | "rules": [ 18 | { 19 | "type": "permanent", 20 | "condition": "FrequentUnregisterNetDevice", 21 | "reason": "UnregisterNetDevice", 22 | "path": "/home/kubernetes/bin/log-counter", 23 | "args": [ 24 | "--lookback=20m", 25 | "--count=3", 26 | "--pattern=unregister_netdevice: waiting for \\w+ to become free. Usage count = \\d+" 27 | ], 28 | "timeout": "1m" 29 | } 30 | ] 31 | } 32 | -------------------------------------------------------------------------------- /config/kernel-monitor.json: -------------------------------------------------------------------------------- 1 | { 2 | "plugin": "journald", 3 | "pluginConfig": { 4 | "source": "kernel" 5 | }, 6 | "logPath": "/var/log/journal", 7 | "lookback": "5m", 8 | "bufferSize": 10, 9 | "source": "kernel-monitor", 10 | "conditions": [ 11 | { 12 | "type": "KernelDeadlock", 13 | "reason": "KernelHasNoDeadlock", 14 | "message": "kernel has no deadlock" 15 | } 16 | ], 17 | "rules": [ 18 | { 19 | "type": "temporary", 20 | "reason": "OOMKilling", 21 | "pattern": "Kill process \\d+ (.+) score \\d+ or sacrifice child\\nKilled process \\d+ (.+) total-vm:\\d+kB, anon-rss:\\d+kB, file-rss:\\d+kB.*" 22 | }, 23 | { 24 | "type": "temporary", 25 | "reason": "TaskHung", 26 | "pattern": "task \\S+:\\w+ blocked for more than \\w+ seconds\\." 27 | }, 28 | { 29 | "type": "temporary", 30 | "reason": "UnregisterNetDevice", 31 | "pattern": "unregister_netdevice: waiting for \\w+ to become free. Usage count = \\d+" 32 | }, 33 | { 34 | "type": "temporary", 35 | "reason": "KernelOops", 36 | "pattern": "BUG: unable to handle kernel NULL pointer dereference at .*" 37 | }, 38 | { 39 | "type": "temporary", 40 | "reason": "KernelOops", 41 | "pattern": "divide error: 0000 \\[#\\d+\\] SMP" 42 | }, 43 | { 44 | "type": "permanent", 45 | "condition": "KernelDeadlock", 46 | "reason": "AUFSUmountHung", 47 | "pattern": "task umount\\.aufs:\\w+ blocked for more than \\w+ seconds\\." 48 | }, 49 | { 50 | "type": "permanent", 51 | "condition": "KernelDeadlock", 52 | "reason": "DockerHung", 53 | "pattern": "task docker:\\w+ blocked for more than \\w+ seconds\\." 54 | } 55 | ] 56 | } 57 | -------------------------------------------------------------------------------- /init-configmap.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # init config files into configmap 4 | 5 | kubectl create configmap npd-config --from-file=./config -n kube-system 6 | 7 | -------------------------------------------------------------------------------- /npd.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: ServiceAccount 3 | metadata: 4 | name: node-problem-detector 5 | namespace: kube-system 6 | labels: 7 | kubernetes.io/cluster-service: "true" 8 | addonmanager.kubernetes.io/mode: Reconcile 9 | --- 10 | apiVersion: rbac.authorization.k8s.io/v1 11 | kind: ClusterRoleBinding 12 | metadata: 13 | name: npd-binding 14 | labels: 15 | kubernetes.io/cluster-service: "true" 16 | addonmanager.kubernetes.io/mode: Reconcile 17 | roleRef: 18 | apiGroup: rbac.authorization.k8s.io 19 | kind: ClusterRole 20 | name: system:node-problem-detector 21 | subjects: 22 | - kind: ServiceAccount 23 | name: node-problem-detector 24 | namespace: kube-system 25 | --- 26 | apiVersion: extensions/v1beta1 27 | kind: DaemonSet 28 | metadata: 29 | name: npd-v0.5.0 30 | namespace: kube-system 31 | labels: 32 | k8s-app: node-problem-detector 33 | version: v0.5.0 34 | kubernetes.io/cluster-service: "true" 35 | addonmanager.kubernetes.io/mode: Reconcile 36 | spec: 37 | template: 38 | metadata: 39 | labels: 40 | k8s-app: node-problem-detector 41 | version: v0.5.0 42 | kubernetes.io/cluster-service: "true" 43 | spec: 44 | containers: 45 | - name: node-problem-detector 46 | image: registry.cn-shenzhen.aliyuncs.com/acs-k8s/node-problem-detector:v0.5.0 47 | command: 48 | - "/bin/sh" 49 | - "-c" 50 | # Pass both config to support both journald and syslog. 51 | - "/node-problem-detector --logtostderr --system-log-monitors=/config/kernel-monitor.json,/config/docker-monitor.json,/config/abrt-adaptor.json" 52 | securityContext: 53 | privileged: true 54 | resources: 55 | limits: 56 | cpu: "200m" 57 | memory: "100Mi" 58 | requests: 59 | cpu: "20m" 60 | memory: "20Mi" 61 | env: 62 | - name: NODE_NAME 63 | valueFrom: 64 | fieldRef: 65 | fieldPath: spec.nodeName 66 | volumeMounts: 67 | - name: log 68 | mountPath: /var/log 69 | - name: localtime 70 | mountPath: /etc/localtime 71 | readOnly: true 72 | - name: journal 73 | mountPath: /var/log/journal 74 | readOnly: true 75 | - name: npd-config 76 | mountPath: /config 77 | volumes: 78 | - name: log 79 | hostPath: 80 | path: /var/log/ 81 | - name: localtime 82 | hostPath: 83 | path: /etc/localtime 84 | type: "FileOrCreate" 85 | - name: journal 86 | hostPath: 87 | path: /var/log/journal 88 | - name: npd-config 89 | configMap: 90 | name: npd-config 91 | serviceAccountName: node-problem-detector 92 | tolerations: 93 | - operator: "Exists" 94 | effect: "NoExecute" 95 | - key: "CriticalAddonsOnly" 96 | operator: "Exists" 97 | -------------------------------------------------------------------------------- /uninstall-npd.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | kubectl delete daemonset/npd-v0.5.0 -n kube-system 4 | kubectl delete ClusterRoleBinding/npd-binding -n kube-system 5 | kubectl delete serviceaccount/node-problem-detector -n kube-system 6 | 7 | kubectl delete configmap/npd-config -n kube-system 8 | --------------------------------------------------------------------------------