{"id":1631,"date":"2020-06-21T20:43:23","date_gmt":"2020-06-21T12:43:23","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1631"},"modified":"2020-06-21T20:43:23","modified_gmt":"2020-06-21T12:43:23","slug":"kubernetes-%e9%83%a8%e7%bd%b2%e5%b9%b6%e8%bf%90%e8%a1%8c-zookeeper%e9%9b%86%e7%be%a4","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1631","title":{"rendered":"kubernetes \u90e8\u7f72\u5e76\u8fd0\u884c ZooKeeper\u96c6\u7fa4"},"content":{"rendered":"<p>\u5728 Kubernetes \u4e0a\u4f7f\u7528 PodDisruptionBudgets\u00a0\u548c\u00a0PodAntiAffinity\u00a0\u7279\u6027\u8fd0\u884c\u00a0Apache Zookeeper\u3002<\/p>\n<h2 id=\\\"\u51c6\u5907\u5f00\u59cb\\\">\u51c6\u5907\u5f00\u59cb<\/h2>\n<p>\u719f\u6089\u4ee5\u4e0b Kubernetes \u6982\u5ff5\u3002<\/p>\n<ul>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/pods\/single-container\/\\\">Pods<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/dns-pod-service\/\\\">Cluster DNS<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/service\/#headless-services\\\">Headless Services<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/storage\/volumes\/\\\">PersistentVolumes<\/a><\/li>\n<li><a href=\\\"http:\/\/releases.k8s.io\/master\/examples\/persistent-volume-provisioning\/\\\">PersistentVolume Provisioning<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tasks\/configure-pod-container\/configure-pod-configmap\/\\\">ConfigMaps<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/abstractions\/controllers\/statefulsets\/\\\">StatefulSets<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/admin\/disruptions\/#specifying-a-poddisruptionbudget\\\">PodDisruptionBudgets<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/node-selection\/#inter-pod-affinity-and-anti-affinity-beta-feature\\\">PodAntiAffinity<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\\\">kubectl CLI<\/a><\/li>\n<\/ul>\n<p>\u4f60\u9700\u8981\u4e00\u4e2a\u81f3\u5c11\u5305\u542b\u56db\u4e2a\u8282\u70b9\u7684\u96c6\u7fa4\uff0c\u6bcf\u4e2a\u8282\u70b9\u81f3\u5c11 2 CPUs \u548c 4 GiB \u5185\u5b58\u3002\u5728\u672c\u6559\u7a0b\u4e2d\u4f60\u5c06\u4f1a cordon \u548c drain \u96c6\u7fa4\u7684\u8282\u70b9\u3002\u8fd9\u610f\u5473\u7740\u96c6\u7fa4\u8282\u70b9\u4e0a\u6240\u6709\u7684 Pods \u5c06\u4f1a\u88ab\u7ec8\u6b62\u5e76\u79fb\u9664\u3002\u8fd9\u4e9b\u8282\u70b9\u4e5f\u4f1a\u6682\u65f6\u53d8\u4e3a\u4e0d\u53ef\u8c03\u5ea6\u3002\u5728\u672c\u6559\u7a0b\u4e2d\u4f60\u5e94\u8be5\u4f7f\u7528\u4e00\u4e2a\u72ec\u5360\u7684\u96c6\u7fa4\uff0c\u6216\u8005\u4fdd\u8bc1\u4f60\u9020\u6210\u7684\u5e72\u6270\u4e0d\u4f1a\u5f71\u54cd\u5176\u5b83\u79df\u6237\u3002<br \/>\n\u5047\u8bbe\u4f60\u7684\u96c6\u7fa4\u914d\u7f6e\u4e3a\u52a8\u6001\u7684\u63d0\u4f9b PersistentVolumes\u3002\u5982\u679c\u4f60\u7684\u96c6\u7fa4\u6ca1\u6709\u914d\u7f6e\u6210\u8fd9\u6837\uff0c\u5728\u5f00\u59cb\u672c\u6559\u7a0b\u524d\uff0c\u4f60\u9700\u8981\u624b\u52a8\u51c6\u5907\u4e09\u4e2a 20 GiB \u7684\u5377\u3002<\/p>\n<h2 id=\\\"\u6559\u7a0b\u76ee\u6807\\\">\u76ee\u6807<\/h2>\n<ul>\n<li>\u5982\u4f55\u4f7f\u7528 StatefulSet \u90e8\u7f72\u4e00\u4e2a ZooKeeper ensemble\u3002<\/li>\n<li>\u5982\u4f55\u4f7f\u7528 ConfigMaps \u4e00\u81f4\u6027\u914d\u7f6e ensemble\u3002<\/li>\n<li>\u5982\u4f55\u5728 ensemble \u4e2d \u5206\u5e03 ZooKeeper \u670d\u52a1\u7684\u90e8\u7f72\u3002<\/li>\n<li>\u5982\u4f55\u5728\u8ba1\u5212\u7ef4\u62a4\u4e2d\u4f7f\u7528 PodDisruptionBudgets \u786e\u4fdd\u670d\u52a1\u53ef\u7528\u6027\u3002<\/li>\n<\/ul>\n<h3 id=\\\"zookeeper-\u57fa\u7840\\\">ZooKeeper \u57fa\u7840<\/h3>\n<p>Apache ZooKeeper\u00a0\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u5f00\u6e90\u534f\u8c03\u670d\u52a1\uff0c\u7528\u4e8e\u5206\u5e03\u5f0f\u7cfb\u7edf\u3002ZooKeeper \u5141\u8bb8\u4f60\u8bfb\u53d6\u3001\u5199\u5165\u6570\u636e\u548c\u53d1\u73b0\u6570\u636e\u66f4\u65b0\u3002\u6570\u636e\u6309\u5c42\u6b21\u7ed3\u6784\u7ec4\u7ec7\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u5e76\u590d\u5236\u5230 ensemble\uff08\u4e00\u4e2a ZooKeeper \u670d\u52a1\u7684\u96c6\u5408\uff09 \u4e2d\u6240\u6709\u7684 ZooKeeper \u670d\u52a1\u3002\u5bf9\u6570\u636e\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u7684\u548c\u987a\u5e8f\u4e00\u81f4\u7684\u3002ZooKeeper \u901a\u8fc7\u00a0<a href=\\\"https:\/\/pdfs.semanticscholar.org\/b02c\/6b00bd5dbdbd951fddb00b906c82fa80f0b3.pdf\\\">Zab<\/a>\u00a0\u4e00\u81f4\u6027\u534f\u8bae\u5728 ensemble \u7684\u6240\u6709\u670d\u52a1\u4e4b\u95f4\u590d\u5236\u4e00\u4e2a\u72b6\u6001\u673a\u6765\u786e\u4fdd\u8fd9\u4e2a\u7279\u6027\u3002<br \/>\nensemble \u4f7f\u7528 Zab \u534f\u8bae\u9009\u4e3e\u4e00\u4e2a leader\uff0c\u5728\u9009\u4e3e\u51fa leader \u524d\u4e0d\u80fd\u5199\u5165\u6570\u636e\u3002\u4e00\u65e6\u9009\u4e3e\u51fa\u4e86 leader\uff0censemble \u4f7f\u7528 Zab \u4fdd\u8bc1\u6240\u6709\u5199\u5165\u88ab\u590d\u5236\u5230\u4e00\u4e2a quorum\uff0c\u7136\u540e\u8fd9\u4e9b\u5199\u5165\u64cd\u4f5c\u624d\u4f1a\u88ab\u786e\u8ba4\u5e76\u5bf9\u5ba2\u6237\u7aef\u53ef\u7528\u3002\u5982\u679c\u6ca1\u6709\u9075\u7167\u52a0\u6743 quorums\uff0c\u4e00\u4e2a quorum \u8868\u793a\u5305\u542b\u5f53\u524d leader \u7684 ensemble \u7684\u591a\u6570\u6210\u5458\u3002\u4f8b\u5982\uff0c\u5982\u679c ensemble \u67093\u4e2a\u670d\u52a1\uff0c\u4e00\u4e2a\u5305\u542b leader \u7684\u6210\u5458\u548c\u53e6\u4e00\u4e2a\u670d\u52a1\u5c31\u7ec4\u6210\u4e86\u4e00\u4e2a quorum\u3002\u5982\u679c ensemble \u4e0d\u80fd\u8fbe\u6210\u4e00\u4e2a quorum\uff0c\u6570\u636e\u5c06\u4e0d\u80fd\u88ab\u5199\u5165\u3002<br \/>\nZooKeeper \u5728\u5185\u5b58\u4e2d\u4fdd\u5b58\u5b83\u4eec\u7684\u6574\u4e2a\u72b6\u6001\u673a\uff0c\u4f46\u662f\u6bcf\u4e2a\u6539\u53d8\u90fd\u88ab\u5199\u5165\u4e00\u4e2a\u5728\u5b58\u50a8\u4ecb\u8d28\u4e0a\u7684\u6301\u4e45 WAL\uff08Write Ahead Log\uff09\u3002\u5f53\u4e00\u4e2a\u670d\u52a1\u6545\u969c\u65f6\uff0c\u5b83\u80fd\u591f\u901a\u8fc7\u56de\u653e WAL \u6062\u590d\u4e4b\u524d\u7684\u72b6\u6001\u3002\u4e3a\u4e86\u9632\u6b62 WAL \u65e0\u9650\u5236\u7684\u589e\u957f\uff0cZooKeeper \u670d\u52a1\u4f1a\u5b9a\u671f\u7684\u5c06\u5185\u5b58\u72b6\u6001\u5feb\u7167\u4fdd\u5b58\u5230\u5b58\u50a8\u4ecb\u8d28\u3002\u8fd9\u4e9b\u5feb\u7167\u80fd\u591f\u76f4\u63a5\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u6240\u6709\u5728\u8fd9\u4e2a\u5feb\u7167\u4e4b\u524d\u7684 WAL \u6761\u76ee\u90fd\u53ef\u4ee5\u88ab\u5b89\u5168\u7684\u4e22\u5f03\u3002<\/p>\n<h2 id=\\\"\u521b\u5efa\u4e00\u4e2a-zookeeper-ensemble\\\">\u521b\u5efa\u4e00\u4e2a ZooKeeper Ensemble<\/h2>\n<p>\u4e0b\u9762\u7684\u6e05\u5355\u5305\u542b\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/service\/#headless-services\\\">Headless Service<\/a>\uff0c \u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/service\/\\\">Service<\/a>\uff0c \u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/workloads\/pods\/disruptions\/\/#specifying-a-poddisruptionbudget\\\">PodDisruptionBudget<\/a>\uff0c \u548c\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/workloads\/controllers\/statefulset\/\\\">StatefulSet<\/a>\u3002<\/p>\n<table id=\\\"application-zookeeper-zookeeper-yaml\\\">\n<thead>\n<tr>\n<th><a href=\\\"https:\/\/raw.githubusercontent.com\/kubernetes\/website\/master\/content\/zh\/examples\/application\/zookeeper\/zookeeper.yaml\\\" download=\\\"application\/zookeeper\/zookeeper.yaml\\\">application\/zookeeper\/zookeeper.yaml<\/a>\u00a0<img title=\\\"Copy application\/zookeeper\/zookeeper.yaml to clipboard\\\" src=\\\"https:\/\/d33wubrfki0l68.cloudfront.net\/951ae1fcc65e28202164b32c13fa7ae04fab4a0b\/b77dc\/images\/copycode.svg\\\" \/><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<div>\n<pre>apiVersion: v1\nkind: Service\nmetadata:\n  name: zk-hs\n  labels:\n    app: zk\nspec:\n  ports:\n  - port: 2888\n    name: server\n  - port: 3888\n    name: leader-election\n  clusterIP: None\n  selector:\n    app: zk\n---\napiVersion: v1\nkind: Service\nmetadata:\n  name: zk-cs\n  labels:\n    app: zk\nspec:\n  ports:\n  - port: 2181\n    name: client\n  selector:\n    app: zk\n---\napiVersion: policy\/v1beta1\nkind: PodDisruptionBudget\nmetadata:\n  name: zk-pdb\nspec:\n  selector:\n    matchLabels:\n      app: zk\n  maxUnavailable: 1\n---\napiVersion: apps\/v1\nkind: StatefulSet\nmetadata:\n  name: zk\nspec:\n  selector:\n    matchLabels:\n      app: zk\n  serviceName: zk-hs\n  replicas: 3\n  updateStrategy:\n    type: RollingUpdate\n  podManagementPolicy: OrderedReady\n  template:\n    metadata:\n      labels:\n        app: zk\n    spec:\n      affinity:\n        podAntiAffinity:\n          requiredDuringSchedulingIgnoredDuringExecution:\n            - labelSelector:\n                matchExpressions:\n                  - key: \\\"app\\\"\n                    operator: In\n                    values:\n                    - zk\n              topologyKey: \\\"kubernetes.io\/hostname\\\"\n      containers:\n      - name: kubernetes-zookeeper\n        imagePullPolicy: Always\n        image: \\\"k8s.gcr.io\/kubernetes-zookeeper:1.0-3.4.10\\\"\n        resources:\n          requests:\n            memory: \\\"1Gi\\\"\n            cpu: \\\"0.5\\\"\n        ports:\n        - containerPort: 2181\n          name: client\n        - containerPort: 2888\n          name: server\n        - containerPort: 3888\n          name: leader-election\n        command:\n        - sh\n        - -c\n        - \\\"start-zookeeper \\\\\n          --servers=3 \\\\\n          --data_dir=\/var\/lib\/zookeeper\/data \\\\\n          --data_log_dir=\/var\/lib\/zookeeper\/data\/log \\\\\n          --conf_dir=\/opt\/zookeeper\/conf \\\\\n          --client_port=2181 \\\\\n          --election_port=3888 \\\\\n          --server_port=2888 \\\\\n          --tick_time=2000 \\\\\n          --init_limit=10 \\\\\n          --sync_limit=5 \\\\\n          --heap=512M \\\\\n          --max_client_cnxns=60 \\\\\n          --snap_retain_count=3 \\\\\n          --purge_interval=12 \\\\\n          --max_session_timeout=40000 \\\\\n          --min_session_timeout=4000 \\\\\n          --log_level=INFO\\\"\n        readinessProbe:\n          exec:\n            command:\n            - sh\n            - -c\n            - \\\"zookeeper-ready 2181\\\"\n          initialDelaySeconds: 10\n          timeoutSeconds: 5\n        livenessProbe:\n          exec:\n            command:\n            - sh\n            - -c\n            - \\\"zookeeper-ready 2181\\\"\n          initialDelaySeconds: 10\n          timeoutSeconds: 5\n        volumeMounts:\n        - name: datadir\n          mountPath: \/var\/lib\/zookeeper\n      securityContext:\n        runAsUser: 1000\n        fsGroup: 1000\n  volumeClaimTemplates:\n  - metadata:\n      name: datadir\n    spec:\n      accessModes: [ \\\"ReadWriteOnce\\\" ]\n      resources:\n        requests:\n          storage: 10Gi\n<\/pre>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6253\u5f00\u4e00\u4e2a\u547d\u4ee4\u884c\u7ec8\u7aef\uff0c\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#apply\\\">kubectl apply<\/a>\u00a0\u521b\u5efa\u8fd9\u4e2a\u6e05\u5355\u3002<\/p>\n<div>\n<pre>kubectl apply -f https:\/\/k8s.io\/examples\/application\/zookeeper\/zookeeper.yaml\n<\/pre>\n<\/div>\n<p>\u8fd9\u4e2a\u64cd\u4f5c\u521b\u5efa\u4e86\u00a0zk-hs\u00a0Headless Service\u3001zk-cs\u00a0Service\u3001zk-pdb\u00a0PodDisruptionBudget \u548c\u00a0zk\u00a0StatefulSet\u3002<\/p>\n<div>\n<pre>service\/zk-hs created\nservice\/zk-cs created\npoddisruptionbudget.policy\/zk-pdb created\nstatefulset.apps\/zk created\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#get\\\">kubectl get<\/a>\u00a0\u67e5\u770b StatefulSet \u63a7\u5236\u5668\u521b\u5efa\u7684 Pods\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u4e00\u65e6\u00a0zk-2\u00a0Pod \u53d8\u6210 Running \u548c Ready \u72b6\u6001\uff0c\u4f7f\u7528\u00a0CRTL-C\u00a0\u7ed3\u675f kubectl\u3002<\/p>\n<div>\n<pre>NAME      READY     STATUS    RESTARTS   AGE\nzk-0      0\/1       Pending   0          0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         19s\nzk-0      1\/1       Running   0         40s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       ContainerCreating   0         0s\nzk-1      0\/1       Running   0         18s\nzk-1      1\/1       Running   0         40s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       ContainerCreating   0         0s\nzk-2      0\/1       Running   0         19s\nzk-2      1\/1       Running   0         40s\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u521b\u5efa\u4e863\u4e2a Pods\uff0c\u6bcf\u4e2a Pod \u5305\u542b\u4e00\u4e2a\u00a0<a href=\\\"http:\/\/www-us.apache.org\/dist\/zookeeper\/zookeeper-3.4.9\/\\\">ZooKeeper 3.4.9<\/a>\u00a0\u670d\u52a1\u3002<\/p>\n<h3 id=\\\"\u4fc3\u6210-leader-\u9009\u4e3e\\\">\u4fc3\u6210 Leader \u9009\u4e3e<\/h3>\n<p>\u7531\u4e8e\u5728\u533f\u540d\u7f51\u7edc\u4e2d\u6ca1\u6709\u7528\u4e8e\u9009\u4e3e leader \u7684\u7ec8\u6b62\u7b97\u6cd5\uff0cZab \u8981\u6c42\u663e\u5f0f\u7684\u8fdb\u884c\u6210\u5458\u5173\u7cfb\u914d\u7f6e\uff0c\u4ee5\u6267\u884c leader \u9009\u4e3e\u3002Ensemble \u4e2d\u7684\u6bcf\u4e2a\u670d\u52a1\u90fd\u9700\u8981\u5177\u6709\u4e00\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u6807\u8bc6\u7b26\uff0c\u6240\u6709\u7684\u670d\u52a1\u5747\u9700\u8981\u77e5\u9053\u6807\u8bc6\u7b26\u7684\u5168\u96c6\uff0c\u5e76\u4e14\u6bcf\u4e2a\u6807\u5fd7\u90fd\u9700\u8981\u548c\u4e00\u4e2a\u7f51\u7edc\u5730\u5740\u76f8\u5173\u8054\u3002<br \/>\n\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#exec\\\">kubectl exec<\/a>\u00a0\u83b7\u53d6\u00a0zk\u00a0StatefulSet \u4e2d Pods \u7684\u4e3b\u673a\u540d\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do kubectl exec zk-$i -- hostname; done\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u57fa\u4e8e\u6bcf\u4e2a Pod \u7684\u5e8f\u53f7\u7d22\u5f15\u4e3a\u5b83\u4eec\u5404\u81ea\u63d0\u4f9b\u4e00\u4e2a\u552f\u4e00\u7684\u4e3b\u673a\u540d\u3002\u4e3b\u673a\u540d\u91c7\u7528\u00a0&lt;statefulset name&gt;-&lt;ordinal index&gt;\u00a0\u7684\u5f62\u5f0f\u3002\u7531\u4e8e\u00a0zk\u00a0StatefulSet \u7684\u00a0replicas\u00a0\u5b57\u6bb5\u8bbe\u7f6e\u4e3a3\uff0c\u8fd9\u4e2a Set \u7684\u63a7\u5236\u5668\u5c06\u521b\u5efa3\u4e2a Pods\uff0c\u4e3b\u673a\u540d\u4e3a\uff1azk-0\u3001zk-1\u00a0\u548c\u00a0zk-2\u3002<\/p>\n<div>\n<pre>zk-0\nzk-1\nzk-2\n<\/pre>\n<\/div>\n<p>ZooKeeper ensemble \u4e2d\u7684\u670d\u52a1\u4f7f\u7528\u81ea\u7136\u6570\u4f5c\u4e3a\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u6bcf\u4e2a\u670d\u52a1\u7684\u6807\u8bc6\u7b26\u90fd\u4fdd\u5b58\u5728\u670d\u52a1\u7684\u6570\u636e\u76ee\u5f55\u4e2d\u4e00\u4e2a\u540d\u4e3a\u00a0myid\u00a0\u7684\u6587\u4ef6\u91cc\u3002<br \/>\n\u68c0\u67e5\u6bcf\u4e2a\u670d\u52a1\u7684\u00a0myid\u00a0\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do echo \\\"myid zk-$i\\\";kubectl exec zk-$i -- cat \/var\/lib\/zookeeper\/data\/myid; done\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u6807\u8bc6\u7b26\u4e3a\u81ea\u7136\u6570\u5e76\u4e14\u5e8f\u53f7\u7d22\u5f15\u662f\u975e\u8d1f\u6574\u6570\uff0c\u4f60\u53ef\u4ee5\u5728\u5e8f\u53f7\u4e0a\u52a0 1 \u6765\u751f\u6210\u4e00\u4e2a\u6807\u8bc6\u7b26\u3002<\/p>\n<div>\n<pre>myid zk-0\n1\nmyid zk-1\n2\nmyid zk-2\n3\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6\u00a0zk\u00a0StatefulSet \u4e2d\u6bcf\u4e2a Pod \u7684 FQDN (Fully Qualified Domain Name\uff0c\u6b63\u5f0f\u57df\u540d)\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done\n<\/pre>\n<\/div>\n<p>zk-headless\u00a0Service \u4e3a\u6240\u6709 Pods \u521b\u5efa\u4e86\u4e00\u4e2a domain\uff1azk-headless.default.svc.cluster.local\u3002<\/p>\n<div>\n<pre>zk-0.zk-headless.default.svc.cluster.local\nzk-1.zk-headless.default.svc.cluster.local\nzk-2.zk-headless.default.svc.cluster.local\n<\/pre>\n<\/div>\n<p><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/dns-pod-service\/\\\">Kubernetes DNS<\/a>\u00a0\u4e2d\u7684 A \u8bb0\u5f55\u5c06 FQDNs \u89e3\u6790\u6210\u4e3a Pods \u7684 IP \u5730\u5740\u3002\u5982\u679c Pods \u88ab\u8c03\u5ea6\uff0c\u8fd9\u4e2a A \u8bb0\u5f55\u5c06\u4f1a\u4f7f\u7528 Pods \u7684\u65b0 IP \u5730\u5740\u66f4\u65b0\uff0c\u4f46 A \u8bb0\u5f55\u7684\u540d\u79f0\u4e0d\u4f1a\u6539\u53d8\u3002<br \/>\nZooKeeper \u5728\u4e00\u4e2a\u540d\u4e3a\u00a0zoo.cfg\u00a0\u7684\u6587\u4ef6\u4e2d\u4fdd\u5b58\u5b83\u7684\u5e94\u7528\u914d\u7f6e\u3002\u4f7f\u7528\u00a0kubectl exec\u00a0\u5728\u00a0zk-0\u00a0Pod \u4e2d\u67e5\u770b\u00a0zoo.cfg\u00a0\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/p>\n<pre>kubectl exec zk-0 -- cat \/opt\/zookeeper\/conf\/zoo.cfg\n<\/pre>\n<p>\u6587\u4ef6\u5e95\u90e8\u4e3a\u00a0server.1\u3001server.2\u00a0\u548c\u00a0server.3\uff0c\u5176\u4e2d\u7684\u00a01\u30012\u548c3\u5206\u522b\u5bf9\u5e94 ZooKeeper \u670d\u52a1\u7684\u00a0myid\u00a0\u6587\u4ef6\u4e2d\u7684\u6807\u8bc6\u7b26\u3002\u5b83\u4eec\u88ab\u8bbe\u7f6e\u4e3a\u00a0zk\u00a0StatefulSet \u4e2d\u7684 Pods \u7684 FQDNs\u3002<\/p>\n<div>\n<pre>clientPort=2181\ndataDir=\/var\/lib\/zookeeper\/data\ndataLogDir=\/var\/lib\/zookeeper\/log\ntickTime=2000\ninitLimit=10\nsyncLimit=2000\nmaxClientCnxns=60\nminSessionTimeout= 4000\nmaxSessionTimeout= 40000\nautopurge.snapRetainCount=3\nautopurge.purgeInterval=0\nserver.1=zk-0.zk-headless.default.svc.cluster.local:2888:3888\nserver.2=zk-1.zk-headless.default.svc.cluster.local:2888:3888\nserver.3=zk-2.zk-headless.default.svc.cluster.local:2888:3888\n<\/pre>\n<\/div>\n<h3 id=\\\"\u8fbe\u6210\u4e00\u81f4\\\">\u8fbe\u6210\u4e00\u81f4<\/h3>\n<p>\u4e00\u81f4\u6027\u534f\u8bae\u8981\u6c42\u6bcf\u4e2a\u53c2\u4e0e\u8005\u7684\u6807\u8bc6\u7b26\u552f\u4e00\u3002\u5728 Zab \u534f\u8bae\u91cc\u4efb\u4f55\u4e24\u4e2a\u53c2\u4e0e\u8005\u90fd\u4e0d\u5e94\u8be5\u58f0\u660e\u76f8\u540c\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u3002\u5bf9\u4e8e\u8ba9\u7cfb\u7edf\u4e2d\u7684\u8fdb\u7a0b\u534f\u5546\u54ea\u4e9b\u8fdb\u7a0b\u5df2\u7ecf\u63d0\u4ea4\u4e86\u54ea\u4e9b\u6570\u636e\u800c\u8a00\uff0c\u8fd9\u662f\u5fc5\u987b\u7684\u3002\u5982\u679c\u6709\u4e24\u4e2a Pods \u4f7f\u7528\u76f8\u540c\u7684\u5e8f\u53f7\u542f\u52a8\uff0c\u8fd9\u4e24\u4e2a ZooKeeper \u670d\u52a1\u4f1a\u5c06\u81ea\u5df1\u8bc6\u522b\u4e3a\u76f8\u540c\u7684\u670d\u52a1\u3002<br \/>\n\u5f53\u4f60\u521b\u5efa\u00a0zk\u00a0StatefulSet \u65f6\uff0cStatefulSet \u63a7\u5236\u5668\u6309\u7167 Pods \u7684\u5e8f\u53f7\u7d22\u5f15\u987a\u5e8f\u7684\u521b\u5efa\u6bcf\u4e2a Pod\u3002\u5728\u521b\u5efa\u4e0b\u4e00\u4e2a Pod \u524d\u4f1a\u7b49\u5f85\u6bcf\u4e2a Pod \u53d8\u6210 Running \u548c Ready \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      0\/1       Pending   0          0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         19s\nzk-0      1\/1       Running   0         40s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       ContainerCreating   0         0s\nzk-1      0\/1       Running   0         18s\nzk-1      1\/1       Running   0         40s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       ContainerCreating   0         0s\nzk-2      0\/1       Running   0         19s\nzk-2      1\/1       Running   0         40s\n<\/pre>\n<\/div>\n<p>\u6bcf\u4e2a Pod \u7684 A \u8bb0\u5f55\u4ec5\u5728 Pod \u53d8\u6210 Ready\u72b6\u6001\u65f6\u88ab\u5f55\u5165\u3002\u56e0\u6b64\uff0cZooKeeper \u670d\u52a1\u7684 FQDNs \u53ea\u4f1a\u89e3\u6790\u5230\u4e00\u4e2a endpoint\uff0c\u800c\u90a3\u4e2a endpoint \u5c06\u4f1a\u662f\u4e00\u4e2a\u552f\u4e00\u7684 ZooKeeper \u670d\u52a1\uff0c\u8fd9\u4e2a\u670d\u52a1\u58f0\u660e\u4e86\u914d\u7f6e\u5728\u5b83\u7684\u00a0myid\u00a0\u6587\u4ef6\u4e2d\u7684\u6807\u8bc6\u7b26\u3002<\/p>\n<div>\n<pre>zk-0.zk-headless.default.svc.cluster.local\nzk-1.zk-headless.default.svc.cluster.local\nzk-2.zk-headless.default.svc.cluster.local\n<\/pre>\n<\/div>\n<p>\u8fd9\u4fdd\u8bc1\u4e86 ZooKeepers \u7684\u00a0zoo.cfg\u00a0\u6587\u4ef6\u4e2d\u7684\u00a0servers\u00a0\u5c5e\u6027\u4ee3\u8868\u4e86\u4e00\u4e2a\u6b63\u786e\u914d\u7f6e\u7684 ensemble\u3002<\/p>\n<div>\n<pre>server.1=zk-0.zk-headless.default.svc.cluster.local:2888:3888\nserver.2=zk-1.zk-headless.default.svc.cluster.local:2888:3888\nserver.3=zk-2.zk-headless.default.svc.cluster.local:2888:3888\n<\/pre>\n<\/div>\n<p>\u5f53\u670d\u52a1\u4f7f\u7528 Zab \u534f\u8bae\u5c1d\u8bd5\u63d0\u4ea4\u4e00\u4e2a\u503c\u7684\u65f6\u5019\uff0c\u5b83\u4eec\u4f1a\u8fbe\u6210\u4e00\u81f4\u5e76\u6210\u529f\u63d0\u4ea4\u8fd9\u4e2a\u503c\uff08\u5982\u679c leader \u9009\u4e3e\u6210\u529f\u5e76\u4e14\u81f3\u5c11\u6709\u4e24\u4e2a Pods \u5904\u4e8e Running \u548c Ready\u72b6\u6001\uff09\uff0c\u6216\u8005\u5c06\u4f1a\u5931\u8d25\uff08\u5982\u679c\u6ca1\u6709\u6ee1\u8db3\u4e0a\u8ff0\u6761\u4ef6\u4e2d\u7684\u4efb\u610f\u4e00\u6761\uff09\u3002\u5f53\u4e00\u4e2a\u670d\u52a1\u627f\u8ba4\u53e6\u4e00\u4e2a\u670d\u52a1\u7684\u4ee3\u5199\u65f6\u4e0d\u4f1a\u6709\u72b6\u6001\u4ea7\u751f\u3002<\/p>\n<h3 id=\\\"ensemble-\u5065\u5eb7\u68c0\u67e5\\\">Ensemble \u5065\u5eb7\u68c0\u67e5<\/h3>\n<p>\u6700\u57fa\u672c\u7684\u5065\u5eb7\u68c0\u67e5\u662f\u5411\u4e00\u4e2a ZooKeeper \u670d\u52a1\u5199\u5165\u4e00\u4e9b\u6570\u636e\uff0c\u7136\u540e\u4ece\u53e6\u4e00\u4e2a\u670d\u52a1\u8bfb\u53d6\u8fd9\u4e9b\u6570\u636e\u3002<br \/>\n\u4f7f\u7528\u00a0zkCli.sh\u00a0\u811a\u672c\u5728\u00a0zk-0\u00a0Pod \u4e0a\u5199\u5165\u00a0world\u00a0\u5230\u8def\u5f84\u00a0\/hello\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 zkCli.sh create \/hello world\n<\/pre>\n<\/div>\n<p>\u8fd9\u5c06\u4f1a\u628a\u00a0world\u00a0\u5199\u5165 ensemble \u7684\u00a0\/hello\u00a0\u8def\u5f84\u3002<\/p>\n<div>\n<pre>WATCHER::\nWatchedEvent state:SyncConnected type:None path:null\nCreated \/hello\n<\/pre>\n<\/div>\n<p>\u4ece\u00a0zk-1\u00a0Pod \u83b7\u53d6\u6570\u636e\u3002<\/p>\n<div>\n<pre>kubectl exec zk-1 zkCli.sh get \/hello\n<\/pre>\n<\/div>\n<p>\u4f60\u5728\u00a0zk-0\u00a0\u521b\u5efa\u7684\u6570\u636e\u5728 ensemble \u4e2d\u6240\u6709\u7684\u670d\u52a1\u4e0a\u90fd\u662f\u53ef\u7528\u7684\u3002<\/p>\n<div>\n<pre>WATCHER::\nWatchedEvent state:SyncConnected type:None path:null\nworld\ncZxid = 0x100000002\nctime = Thu Dec 08 15:13:30 UTC 2016\nmZxid = 0x100000002\nmtime = Thu Dec 08 15:13:30 UTC 2016\npZxid = 0x100000002\ncversion = 0\ndataVersion = 0\naclVersion = 0\nephemeralOwner = 0x0\ndataLength = 5\nnumChildren = 0\n<\/pre>\n<\/div>\n<h3 id=\\\"\u51c6\u5907\u6301\u4e45\u5b58\u50a8\\\">\u51c6\u5907\u6301\u4e45\u5b58\u50a8<\/h3>\n<p>\u5982\u540c\u5728\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/zookeeper\/#zookeeper-basics\\\">ZooKeeper \u57fa\u7840<\/a>\u00a0\u4e00\u8282\u6240\u63d0\u5230\u7684\uff0cZooKeeper \u63d0\u4ea4\u6240\u6709\u7684\u6761\u76ee\u5230\u4e00\u4e2a\u6301\u4e45 WAL\uff0c\u5e76\u5468\u671f\u6027\u7684\u5c06\u5185\u5b58\u5feb\u7167\u5199\u5165\u5b58\u50a8\u4ecb\u8d28\u3002\u5bf9\u4e8e\u4f7f\u7528\u4e00\u81f4\u6027\u534f\u8bae\u5b9e\u73b0\u4e00\u4e2a\u590d\u5236\u72b6\u6001\u673a\u7684\u5e94\u7528\u6765\u8bf4\uff0c\u4f7f\u7528 WALs \u63d0\u4f9b\u6301\u4e45\u5316\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6280\u672f\uff0c\u5bf9\u4e8e\u666e\u901a\u7684\u5b58\u50a8\u5e94\u7528\u4e5f\u662f\u5982\u6b64\u3002<br \/>\n\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#delete\\\">kubectl delete<\/a>\u00a0\u5220\u9664\u00a0zk\u00a0StatefulSet\u3002<\/p>\n<div>\n<pre>kubectl delete statefulset zk\nstatefulset \\\"zk\\\" deleted\n<\/pre>\n<\/div>\n<p>\u89c2\u5bdf StatefulSet \u4e2d\u7684 Pods \u53d8\u4e3a\u7ec8\u6b62\u72b6\u6001\u3002<\/p>\n<div>\n<pre>get pods -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u5f53\u00a0zk-0\u00a0\u5b8c\u5168\u7ec8\u6b62\u65f6\uff0c\u4f7f\u7528\u00a0CRTL-C\u00a0\u7ed3\u675f kubectl\u3002<\/p>\n<div>\n<pre>zk-2      1\/1       Terminating   0         9m\nzk-0      1\/1       Terminating   0         11m\nzk-1      1\/1       Terminating   0         10m\nzk-2      0\/1       Terminating   0         9m\nzk-2      0\/1       Terminating   0         9m\nzk-2      0\/1       Terminating   0         9m\nzk-1      0\/1       Terminating   0         10m\nzk-1      0\/1       Terminating   0         10m\nzk-1      0\/1       Terminating   0         10m\nzk-0      0\/1       Terminating   0         11m\nzk-0      0\/1       Terminating   0         11m\nzk-0      0\/1       Terminating   0         11m\n<\/pre>\n<\/div>\n<p>\u91cd\u65b0\u5e94\u7528\u00a0zookeeper.yaml\u00a0\u4e2d\u7684\u4ee3\u7801\u6e05\u5355\u3002<\/p>\n<div>\n<pre>kubectl apply -f https:\/\/k8s.io\/docs\/tutorials\/stateful-application\/zookeeper.yaml\n<\/pre>\n<\/div>\n<p>zk\u00a0StatefulSet \u5c06\u4f1a\u88ab\u521b\u5efa\u3002\u7531\u4e8e\u6e05\u5355\u4e2d\u7684\u5176\u4ed6 API \u5bf9\u8c61\u5df2\u7ecf\u5b58\u5728\uff0c\u6240\u4ee5\u5b83\u4eec\u4e0d\u4f1a\u88ab\u4fee\u6539\u3002<\/p>\n<div>\n<pre>statefulset \\\"zk\\\" created\nError from server (AlreadyExists): error when creating \\\"zookeeper.yaml\\\": services \\\"zk-headless\\\" already exists\nError from server (AlreadyExists): error when creating \\\"zookeeper.yaml\\\": configmaps \\\"zk-config\\\" already exists\nError from server (AlreadyExists): error when creating \\\"zookeeper.yaml\\\": poddisruptionbudgets.policy \\\"zk-budget\\\" already exists\n<\/pre>\n<\/div>\n<p>\u89c2\u5bdf StatefulSet \u63a7\u5236\u5668\u91cd\u5efa StatefulSet \u7684 Pods\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u4e00\u65e6\u00a0zk-2\u00a0Pod \u5904\u4e8e Running \u548c Ready \u72b6\u6001\uff0c\u4f7f\u7528\u00a0CRTL-C\u00a0\u505c\u6b62 kubectl\u547d\u4ee4\u3002<\/p>\n<div>\n<pre>NAME      READY     STATUS    RESTARTS   AGE\nzk-0      0\/1       Pending   0          0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         19s\nzk-0      1\/1       Running   0         40s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       ContainerCreating   0         0s\nzk-1      0\/1       Running   0         18s\nzk-1      1\/1       Running   0         40s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       Pending   0         0s\nzk-2      0\/1       ContainerCreating   0         0s\nzk-2      0\/1       Running   0         19s\nzk-2      1\/1       Running   0         40s\n<\/pre>\n<\/div>\n<p>\u4ece\u00a0zk-2\u00a0Pod \u4e2d\u83b7\u53d6\u4f60\u5728<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/zookeeper\/#sanity-testing-the-ensemble\\\">\u5065\u5eb7\u68c0\u67e5<\/a>\u4e2d\u8f93\u5165\u7684\u503c\u3002<\/p>\n<div>\n<pre>kubectl exec zk-2 zkCli.sh get \/hello\n<\/pre>\n<\/div>\n<p>\u5c3d\u7ba1\u00a0zk\u00a0StatefulSet \u4e2d\u6240\u6709\u7684 Pods \u90fd\u5df2\u7ecf\u88ab\u7ec8\u6b62\u5e76\u91cd\u5efa\u8fc7\uff0censemble \u4ecd\u7136\u4f7f\u7528\u539f\u6765\u7684\u6570\u503c\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<div>\n<pre>WATCHER::\nWatchedEvent state:SyncConnected type:None path:null\nworld\ncZxid = 0x100000002\nctime = Thu Dec 08 15:13:30 UTC 2016\nmZxid = 0x100000002\nmtime = Thu Dec 08 15:13:30 UTC 2016\npZxid = 0x100000002\ncversion = 0\ndataVersion = 0\naclVersion = 0\nephemeralOwner = 0x0\ndataLength = 5\nnumChildren = 0\n<\/pre>\n<\/div>\n<p>zk\u00a0StatefulSet \u7684\u00a0spec\u00a0\u4e2d\u7684\u00a0volumeClaimTemplates\u00a0\u5b57\u6bb5\u6807\u8bc6\u4e86\u5c06\u8981\u4e3a\u6bcf\u4e2a Pod \u51c6\u5907\u7684 PersistentVolume\u3002<\/p>\n<div>\n<pre>volumeClaimTemplates:\n  - metadata:\n      name: datadir\n      annotations:\n        volume.alpha.kubernetes.io\/storage-class: anything\n    spec:\n      accessModes: [ \\\"ReadWriteOnce\\\" ]\n      resources:\n        requests:\n          storage: 20Gi\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u4e3a StatefulSet \u4e2d\u7684\u6bcf\u4e2a Pod \u751f\u6210\u4e00\u4e2a PersistentVolumeClaim\u3002<br \/>\n\u83b7\u53d6 StatefulSet \u7684 PersistentVolumeClaims\u3002<\/p>\n<div>\n<pre>kubectl get pvc -l app=zk\n<\/pre>\n<\/div>\n<p>\u5f53 StatefulSet \u91cd\u65b0\u521b\u5efa\u5b83\u7684 Pods\u65f6\uff0cPods \u7684 PersistentVolumes \u4f1a\u88ab\u91cd\u65b0\u6302\u8f7d\u3002<\/p>\n<div>\n<pre>NAME           STATUS    VOLUME                                     CAPACITY   ACCESSMODES   AGE\ndatadir-zk-0   Bound     pvc-bed742cd-bcb1-11e6-994f-42010a800002   20Gi       RWO           1h\ndatadir-zk-1   Bound     pvc-bedd27d2-bcb1-11e6-994f-42010a800002   20Gi       RWO           1h\ndatadir-zk-2   Bound     pvc-bee0817e-bcb1-11e6-994f-42010a800002   20Gi       RWO           1h\n<\/pre>\n<\/div>\n<p>StatefulSet \u7684\u5bb9\u5668\u00a0template\u00a0\u4e2d\u7684\u00a0volumeMounts\u00a0\u4e00\u8282\u4f7f\u5f97 PersistentVolumes \u88ab\u6302\u8f7d\u5230 ZooKeeper \u670d\u52a1\u7684\u6570\u636e\u76ee\u5f55\u3002<\/p>\n<div>\n<pre>volumeMounts:\n        - name: datadir\n          mountPath: \/var\/lib\/zookeeper\n<\/pre>\n<\/div>\n<p>\u5f53\u00a0zk\u00a0StatefulSet \u4e2d\u7684\u4e00\u4e2a Pod \u88ab\uff08\u91cd\u65b0\uff09\u8c03\u5ea6\u65f6\uff0c\u5b83\u603b\u662f\u62e5\u6709\u76f8\u540c\u7684 PersistentVolume\uff0c\u6302\u8f7d\u5230 ZooKeeper \u670d\u52a1\u7684\u6570\u636e\u76ee\u5f55\u3002\u5373\u4f7f\u5728 Pods \u88ab\u91cd\u65b0\u8c03\u5ea6\u65f6\uff0c\u6240\u6709\u5bf9 ZooKeeper \u670d\u52a1\u7684 WALs \u7684\u5199\u5165\u548c\u5b83\u4eec\u7684\u5168\u90e8\u5feb\u7167\u90fd\u4ecd\u7136\u662f\u6301\u4e45\u7684\u3002<\/p>\n<h2 id=\\\"\u786e\u4fdd\u4e00\u81f4\u6027\u914d\u7f6e\\\">\u786e\u4fdd\u4e00\u81f4\u6027\u914d\u7f6e<\/h2>\n<p>\u5982\u540c\u5728\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/zookeeper\/#facilitating-leader-election\\\">\u4fc3\u6210 leader \u9009\u4e3e<\/a>\u00a0\u548c\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/zookeeper\/#achieving-consensus\\\">\u8fbe\u6210\u4e00\u81f4<\/a>\u00a0\u5c0f\u8282\u4e2d\u63d0\u5230\u7684\uff0cZooKeeper ensemble \u4e2d\u7684\u670d\u52a1\u9700\u8981\u4e00\u81f4\u6027\u7684\u914d\u7f6e\u6765\u9009\u4e3e\u4e00\u4e2a leader \u5e76\u5f62\u6210\u4e00\u4e2a quorum\u3002\u5b83\u4eec\u8fd8\u9700\u8981 Zab \u534f\u8bae\u7684\u4e00\u81f4\u6027\u914d\u7f6e\u6765\u4fdd\u8bc1\u8fd9\u4e2a\u534f\u8bae\u5728\u7f51\u7edc\u4e2d\u6b63\u786e\u7684\u5de5\u4f5c\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 ConfigMaps \u8fbe\u5230\u76ee\u7684\u3002<br \/>\n\u83b7\u53d6\u00a0zk-config\u00a0\u7684 ConfigMap\u3002<\/p>\n<div>\n<pre> kubectl get cm zk-config -o yaml\napiVersion: v1\ndata:\n  client.cnxns: \\\"60\\\"\n  ensemble: zk-0;zk-1;zk-2\n  init: \\\"10\\\"\n  jvm.heap: 2G\n  purge.interval: \\\"0\\\"\n  snap.retain: \\\"3\\\"\n  sync: \\\"5\\\"\n  tick: \\\"2000\\\"\n<\/pre>\n<\/div>\n<p>zk\u00a0StatefulSet \u7684\u00a0template\u00a0\u4e2d\u7684\u00a0env\u00a0\u5b57\u6bb5\u8bfb\u53d6 ConfigMap \u5230\u73af\u5883\u53d8\u91cf\u4e2d\u3002\u8fd9\u4e9b\u53d8\u91cf\u5c06\u88ab\u6ce8\u5165\u5230\u5bb9\u5668\u7684\u8fd0\u884c\u73af\u5883\u91cc\u3002<\/p>\n<div>\n<pre>env:\n        - name : ZK_ENSEMBLE\n          valueFrom:\n            configMapKeyRef:\n              name: zk-config\n              key: ensemble\n        - name : ZK_HEAP_SIZE\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: jvm.heap\n        - name : ZK_TICK_TIME\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: tick\n        - name : ZK_INIT_LIMIT\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: init\n        - name : ZK_SYNC_LIMIT\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: tick\n        - name : ZK_MAX_CLIENT_CNXNS\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: client.cnxns\n        - name: ZK_SNAP_RETAIN_COUNT\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: snap.retain\n        - name: ZK_PURGE_INTERVAL\n          valueFrom:\n            configMapKeyRef:\n                name: zk-config\n                key: purge.interval\n<\/pre>\n<\/div>\n<p>\u5728\u542f\u52a8 ZooKeeper \u670d\u52a1\u8fdb\u7a0b\u524d\uff0c\u5bb9\u5668\u7684\u5165\u53e3\u70b9\u8c03\u7528\u4e86\u4e00\u4e2a bash \u811a\u672c\uff1azkGenConfig.sh\u3002\u8fd9\u4e2a bash \u811a\u672c\u4ece\u63d0\u4f9b\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u751f\u6210\u4e86 ZooKeeper \u7684\u914d\u7f6e\u6587\u4ef6\u3002<\/p>\n<div>\n<pre> command:\n        - sh\n        - -c\n        - zkGenConfig.sh &amp;&amp; zkServer.sh start-foreground\n<\/pre>\n<\/div>\n<p>\u68c0\u67e5\u00a0zk\u00a0StatefulSet \u4e2d\u6240\u6709 Pods \u7684\u73af\u5883\u53d8\u91cf\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do kubectl exec zk-$i env | grep ZK_*;echo\\\"\\\"; done\n<\/pre>\n<\/div>\n<p>\u6240\u6709\u4ece\u00a0zk-config\u00a0\u53d6\u5f97\u7684\u53c2\u6570\u90fd\u5305\u542b\u5b8c\u5168\u76f8\u540c\u7684\u503c\u3002\u8fd9\u5c06\u5141\u8bb8\u00a0zkGenConfig.sh\u00a0\u811a\u672c\u4e3a ensemble \u4e2d\u6240\u6709\u7684 ZooKeeper \u670d\u52a1\u521b\u5efa\u4e00\u81f4\u6027\u7684\u914d\u7f6e\u3002<\/p>\n<div>\n<pre>ZK_ENSEMBLE=zk-0;zk-1;zk-2\nZK_HEAP_SIZE=2G\nZK_TICK_TIME=2000\nZK_INIT_LIMIT=10\nZK_SYNC_LIMIT=2000\nZK_MAX_CLIENT_CNXNS=60\nZK_SNAP_RETAIN_COUNT=3\nZK_PURGE_INTERVAL=0\nZK_CLIENT_PORT=2181\nZK_SERVER_PORT=2888\nZK_ELECTION_PORT=3888\nZK_USER=zookeeper\nZK_DATA_DIR=\/var\/lib\/zookeeper\/data\nZK_DATA_LOG_DIR=\/var\/lib\/zookeeper\/log\nZK_LOG_DIR=\/var\/log\/zookeeper\nZK_ENSEMBLE=zk-0;zk-1;zk-2\nZK_HEAP_SIZE=2G\nZK_TICK_TIME=2000\nZK_INIT_LIMIT=10\nZK_SYNC_LIMIT=2000\nZK_MAX_CLIENT_CNXNS=60\nZK_SNAP_RETAIN_COUNT=3\nZK_PURGE_INTERVAL=0\nZK_CLIENT_PORT=2181\nZK_SERVER_PORT=2888\nZK_ELECTION_PORT=3888\nZK_USER=zookeeper\nZK_DATA_DIR=\/var\/lib\/zookeeper\/data\nZK_DATA_LOG_DIR=\/var\/lib\/zookeeper\/log\nZK_LOG_DIR=\/var\/log\/zookeeper\nZK_ENSEMBLE=zk-0;zk-1;zk-2\nZK_HEAP_SIZE=2G\nZK_TICK_TIME=2000\nZK_INIT_LIMIT=10\nZK_SYNC_LIMIT=2000\nZK_MAX_CLIENT_CNXNS=60\nZK_SNAP_RETAIN_COUNT=3\nZK_PURGE_INTERVAL=0\nZK_CLIENT_PORT=2181\nZK_SERVER_PORT=2888\nZK_ELECTION_PORT=3888\nZK_USER=zookeeper\nZK_DATA_DIR=\/var\/lib\/zookeeper\/data\nZK_DATA_LOG_DIR=\/var\/lib\/zookeeper\/log\nZK_LOG_DIR=\/var\/log\/zookeeper\n<\/pre>\n<\/div>\n<h3 id=\\\"\u914d\u7f6e\u65e5\u5fd7\\\">\u914d\u7f6e\u65e5\u5fd7<\/h3>\n<p>zkGenConfig.sh\u00a0\u811a\u672c\u4ea7\u751f\u7684\u4e00\u4e2a\u6587\u4ef6\u63a7\u5236\u4e86 ZooKeeper \u7684\u65e5\u5fd7\u884c\u4e3a\u3002ZooKeeper \u4f7f\u7528\u4e86\u00a0<a href=\\\"http:\/\/logging.apache.org\/log4j\/2.x\/\\\">Log4j<\/a>\u00a0\u5e76\u9ed8\u8ba4\u4f7f\u7528\u57fa\u4e8e\u6587\u4ef6\u5927\u5c0f\u548c\u65f6\u95f4\u7684\u6eda\u52a8\u6587\u4ef6\u8ffd\u52a0\u5668\u4f5c\u4e3a\u65e5\u5fd7\u914d\u7f6e\u3002 \u4ece\u00a0zk\u00a0StatefulSet \u7684\u4e00\u4e2a Pods \u4e2d\u83b7\u53d6\u65e5\u5fd7\u914d\u7f6e\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 cat \/usr\/etc\/zookeeper\/log4j.properties\n<\/pre>\n<\/div>\n<p>\u4e0b\u9762\u7684\u65e5\u5fd7\u914d\u7f6e\u4f1a\u4f7f ZooKeeper \u8fdb\u7a0b\u5c06\u5176\u6240\u6709\u7684\u65e5\u5fd7\u5199\u5165\u6807\u5fd7\u8f93\u51fa\u6587\u4ef6\u6d41\u4e2d\u3002<\/p>\n<div>\n<pre>zookeeper.root.logger=CONSOLE\nzookeeper.console.threshold=INFO\nlog4j.rootLogger=${zookeeper.root.logger}\nlog4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender\nlog4j.appender.CONSOLE.Threshold=${zookeeper.console.threshold}\nlog4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout\nlog4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} [myid:%X{myid}] - %-5p [%t:%C{1}@%L] - %m%n\n<\/pre>\n<\/div>\n<p>\u8fd9\u662f\u5728\u5bb9\u5668\u91cc\u5b89\u5168\u8bb0\u5f55\u65e5\u5fd7\u7684\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002\u7531\u4e8e\u5e94\u7528\u7684\u65e5\u5fd7\u88ab\u5199\u5165\u6807\u51c6\u8f93\u51fa\uff0cKubernetes \u5c06\u4f1a\u4e3a\u4f60\u5904\u7406\u65e5\u5fd7\u8f6e\u8f6c\u3002Kubernetes \u8fd8\u5b9e\u73b0\u4e86\u4e00\u4e2a\u667a\u80fd\u4fdd\u5b58\u7b56\u7565\uff0c\u4fdd\u8bc1\u5199\u5165\u6807\u51c6\u8f93\u51fa\u548c\u6807\u51c6\u9519\u8bef\u6d41\u7684\u5e94\u7528\u65e5\u5fd7\u4e0d\u4f1a\u8017\u5c3d\u672c\u5730\u5b58\u50a8\u5a92\u4ecb\u3002<br \/>\n\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#logs\\\">kubectl logs<\/a>\u00a0\u4ece\u4e00\u4e2a Pod \u4e2d\u53d6\u56de\u6700\u540e\u51e0\u884c\u65e5\u5fd7\u3002<\/p>\n<div>\n<pre>kubectl logs zk-0 --tail 20\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0kubectl logs\u00a0\u6216\u8005\u4ece Kubernetes Dashboard \u53ef\u4ee5\u67e5\u770b\u5199\u5165\u5230\u6807\u51c6\u8f93\u51fa\u548c\u6807\u51c6\u9519\u8bef\u6d41\u4e2d\u7684\u5e94\u7528\u65e5\u5fd7\u3002<\/p>\n<div>\n<pre>2016-12-06 19:34:16,236 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52740\n2016-12-06 19:34:16,237 [myid:1] - INFO  [Thread-1136:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52740 (no session established for client)\n2016-12-06 19:34:26,155 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52749\n2016-12-06 19:34:26,155 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52749\n2016-12-06 19:34:26,156 [myid:1] - INFO  [Thread-1137:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52749 (no session established for client)\n2016-12-06 19:34:26,222 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52750\n2016-12-06 19:34:26,222 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52750\n2016-12-06 19:34:26,226 [myid:1] - INFO  [Thread-1138:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52750 (no session established for client)\n2016-12-06 19:34:36,151 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52760\n2016-12-06 19:34:36,152 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52760\n2016-12-06 19:34:36,152 [myid:1] - INFO  [Thread-1139:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52760 (no session established for client)\n2016-12-06 19:34:36,230 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52761\n2016-12-06 19:34:36,231 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52761\n2016-12-06 19:34:36,231 [myid:1] - INFO  [Thread-1140:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52761 (no session established for client)\n2016-12-06 19:34:46,149 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52767\n2016-12-06 19:34:46,149 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52767\n2016-12-06 19:34:46,149 [myid:1] - INFO  [Thread-1141:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52767 (no session established for client)\n2016-12-06 19:34:46,230 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from \/127.0.0.1:52768\n2016-12-06 19:34:46,230 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0\/0.0.0.0:2181:NIOServerCnxn@827] - Processing ruok command from \/127.0.0.1:52768\n2016-12-06 19:34:46,230 [myid:1] - INFO  [Thread-1142:NIOServerCnxn@1008] - Closed socket connection for client \/127.0.0.1:52768 (no session established for client)\n<\/pre>\n<\/div>\n<h3 id=\\\"\u914d\u7f6e\u975e\u7279\u6743\u7528\u6237\\\">\u914d\u7f6e\u975e\u7279\u6743\u7528\u6237<\/h3>\n<p>\u5728\u5bb9\u5668\u4e2d\u5141\u8bb8\u5e94\u7528\u4ee5\u7279\u6743\u7528\u6237\u8fd0\u884c\u8fd9\u6761\u6700\u4f73\u5b9e\u8df5\u662f\u503c\u5f97\u5546\u8ba8\u7684\u3002\u5982\u679c\u4f60\u7684\u7ec4\u7ec7\u8981\u6c42\u5e94\u7528\u4ee5\u975e\u7279\u6743\u7528\u6237\u8fd0\u884c\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tasks\/configure-pod-container\/security-context\/\\\">SecurityContext<\/a>\u00a0\u63a7\u5236\u8fd0\u884c\u5bb9\u5668\u5165\u53e3\u70b9\u7684\u7528\u6237\u3002<br \/>\nzk\u00a0StatefulSet \u7684 Pod \u7684\u00a0template\u00a0\u5305\u542b\u4e86\u4e00\u4e2a SecurityContext\u3002<\/p>\n<div>\n<pre>securityContext:\n  runAsUser: 1000\n  fsGroup: 1000\n<\/pre>\n<\/div>\n<p>\u5728 Pods \u5bb9\u5668\u5185\u90e8\uff0cUID 1000 \u5bf9\u5e94\u7528\u6237 zookeeper\uff0cGID 1000\u5bf9\u5e94\u7528\u6237\u7ec4 zookeeper\u3002<br \/>\n\u4ece\u00a0zk-0\u00a0Pod \u83b7\u53d6 ZooKeeper \u8fdb\u7a0b\u4fe1\u606f\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 -- ps -elf\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u00a0securityContext\u00a0\u5bf9\u8c61\u7684\u00a0runAsUser\u00a0\u5b57\u6bb5\u88ab\u8bbe\u7f6e\u4e3a1000\u800c\u4e0d\u662f root\uff0cZooKeeper\u8fdb\u7a0b\u5c06\u4ee5 zookeeper \u7528\u6237\u8fd0\u884c\u3002<\/p>\n<div>\n<pre>F S UID        PID  PPID  C PRI  NI ADDR SZ WCHAN  STIME TTY          TIME CMD\n4 S zookeep+     1     0  0  80   0 -  1127 -      20:46 ?        00:00:00 sh -c zkGenConfig.sh &amp;&amp; zkServer.sh start-foreground\n0 S zookeep+    27     1  0  80   0 - 1155556 -    20:46 ?        00:00:19 \/usr\/lib\/jvm\/java-8-openjdk-amd64\/bin\/java -Dzookeeper.log.dir=\/var\/log\/zookeeper -Dzookeeper.root.logger=INFO,CONSOLE -cp \/usr\/bin\/..\/build\/classes:\/usr\/bin\/..\/build\/lib\/*.jar:\/usr\/bin\/..\/share\/zookeeper\/zookeeper-3.4.9.jar:\/usr\/bin\/..\/share\/zookeeper\/slf4j-log4j12-1.6.1.jar:\/usr\/bin\/..\/share\/zookeeper\/slf4j-api-1.6.1.jar:\/usr\/bin\/..\/share\/zookeeper\/netty-3.10.5.Final.jar:\/usr\/bin\/..\/share\/zookeeper\/log4j-1.2.16.jar:\/usr\/bin\/..\/share\/zookeeper\/jline-0.9.94.jar:\/usr\/bin\/..\/src\/java\/lib\/*.jar:\/usr\/bin\/..\/etc\/zookeeper: -Xmx2G -Xms2G -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain \/usr\/bin\/..\/etc\/zookeeper\/zoo.cfg\n<\/pre>\n<\/div>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5f53 Pod \u7684 PersistentVolume \u88ab\u6302\u8f7d\u5230 ZooKeeper \u670d\u52a1\u7684\u6570\u636e\u76ee\u5f55\u65f6\uff0c\u5b83\u53ea\u80fd\u88ab root \u7528\u6237\u8bbf\u95ee\u3002\u8fd9\u4e2a\u914d\u7f6e\u5c06\u963b\u6b62 ZooKeeper \u8fdb\u7a0b\u5199\u5165\u5b83\u7684 WAL \u53ca\u4fdd\u5b58\u5feb\u7167\u3002<br \/>\n\u5728\u00a0zk-0\u00a0Pod \u4e0a\u83b7\u53d6 ZooKeeper \u6570\u636e\u76ee\u5f55\u7684\u6587\u4ef6\u6743\u9650\u3002<\/p>\n<div>\n<pre>kubectl exec -ti zk-0 -- ls -ld \/var\/lib\/zookeeper\/data\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u00a0securityContext\u00a0\u5bf9\u8c61\u7684\u00a0fsGroup\u00a0\u5b57\u6bb5\u8bbe\u7f6e\u4e3a1000\uff0cPods \u7684 PersistentVolumes \u7684\u6240\u6709\u6743\u5c5e\u4e8e zookeeper \u7528\u6237\u7ec4\uff0c\u56e0\u800c ZooKeeper \u8fdb\u7a0b\u80fd\u591f\u6210\u529f\u7684\u8bfb\u5199\u6570\u636e\u3002<\/p>\n<div>\n<pre>drwxr-sr-x 3 zookeeper zookeeper 4096 Dec  5 20:45 \/var\/lib\/zookeeper\/data\n<\/pre>\n<\/div>\n<h2 id=\\\"\u7ba1\u7406-zookeeper-\u8fdb\u7a0b\\\">\u7ba1\u7406 ZooKeeper \u8fdb\u7a0b<\/h2>\n<p><a href=\\\"https:\/\/zookeeper.apache.org\/doc\/current\/zookeeperAdmin.html#sc_supervision\\\">ZooKeeper documentation<\/a>\u00a0\u6587\u6863\u6307\u51fa\u201c\u4f60\u5c06\u9700\u8981\u4e00\u4e2a\u76d1\u7ba1\u7a0b\u5e8f\u7528\u4e8e\u7ba1\u7406\u6bcf\u4e2a ZooKeeper \u670d\u52a1\u8fdb\u7a0b\uff08JVM\uff09\u201d\u3002\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u4f7f\u7528\u4e00\u4e2a\u770b\u95e8\u72d7\uff08\u76d1\u7ba1\u7a0b\u5e8f\uff09\u6765\u91cd\u542f\u6545\u969c\u8fdb\u7a0b\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6a21\u5f0f\u3002<\/p>\n<h3 id=\\\"\u5904\u7406\u8fdb\u7a0b\u6545\u969c\\\">\u5904\u7406\u8fdb\u7a0b\u6545\u969c<\/h3>\n<p><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/pod-states\/#restartpolicy\\\">Restart Policies<\/a>\u00a0\u63a7\u5236 Kubernetes \u5982\u4f55\u5904\u7406\u4e00\u4e2a Pod \u4e2d\u5bb9\u5668\u5165\u53e3\u70b9\u7684\u8fdb\u7a0b\u6545\u969c\u3002\u5bf9\u4e8e StatefulSet \u4e2d\u7684 Pods \u6765\u8bf4\uff0cAlways \u662f\u552f\u4e00\u5408\u9002\u7684 RestartPolicy\uff0c\u8fd9\u4e5f\u662f\u9ed8\u8ba4\u503c\u3002\u4f60\u5e94\u8be5\u7edd\u4e0d\u8986\u76d6 stateful \u5e94\u7528\u7684\u9ed8\u8ba4\u7b56\u7565\u3002<br \/>\n\u68c0\u67e5\u00a0zk-0\u00a0Pod \u4e2d\u8fd0\u884c\u7684 ZooKeeper \u670d\u52a1\u7684\u8fdb\u7a0b\u6811\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 -- ps -ef\n<\/pre>\n<\/div>\n<p>\u4f5c\u4e3a\u5bb9\u5668\u5165\u53e3\u70b9\u7684\u547d\u4ee4\u7684 PID \u4e3a 1\uff0cZookeeper \u8fdb\u7a0b\u662f\u5165\u53e3\u70b9\u7684\u5b50\u8fdb\u7a0b\uff0cPID \u4e3a23\u3002<\/p>\n<pre>UID        PID  PPID  C STIME TTY          TIME CMD\nzookeep+     1     0  0 15:03 ?        00:00:00 sh -c zkGenConfig.sh &amp;&amp; zkServer.sh start-foreground\nzookeep+    27     1  0 15:03 ?        00:00:03 \/usr\/lib\/jvm\/java-8-openjdk-amd64\/bin\/java -Dzookeeper.log.dir=\/var\/log\/zookeeper -Dzookeeper.root.logger=INFO,CONSOLE -cp \/usr\/bin\/..\/build\/classes:\/usr\/bin\/..\/build\/lib\/*.jar:\/usr\/bin\/..\/share\/zookeeper\/zookeeper-3.4.9.jar:\/usr\/bin\/..\/share\/zookeeper\/slf4j-log4j12-1.6.1.jar:\/usr\/bin\/..\/share\/zookeeper\/slf4j-api-1.6.1.jar:\/usr\/bin\/..\/share\/zookeeper\/netty-3.10.5.Final.jar:\/usr\/bin\/..\/share\/zookeeper\/log4j-1.2.16.jar:\/usr\/bin\/..\/share\/zookeeper\/jline-0.9.94.jar:\/usr\/bin\/..\/src\/java\/lib\/*.jar:\/usr\/bin\/..\/etc\/zookeeper: -Xmx2G -Xms2G -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain \/usr\/bin\/..\/etc\/zookeeper\/zoo.cfg\n<\/pre>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u89c2\u5bdf\u00a0zk\u00a0StatefulSet \u4e2d\u7684 Pods\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u6740\u6389 Pod\u00a0zk-0\u00a0\u4e2d\u7684 ZooKeeper \u8fdb\u7a0b\u3002<\/p>\n<div>\n<pre> kubectl exec zk-0 -- pkill java\n<\/pre>\n<\/div>\n<p>ZooKeeper \u8fdb\u7a0b\u7684\u7ec8\u7ed3\u5bfc\u81f4\u4e86\u5b83\u7236\u8fdb\u7a0b\u7684\u7ec8\u6b62\u3002\u7531\u4e8e\u5bb9\u5668\u7684 RestartPolicy \u662f Always\uff0c\u7236\u8fdb\u7a0b\u88ab\u91cd\u542f\u3002<\/p>\n<div>\n<pre>NAME      READY     STATUS    RESTARTS   AGE\nzk-0      1\/1       Running   0          21m\nzk-1      1\/1       Running   0          20m\nzk-2      1\/1       Running   0          19m\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      0\/1       Error     0          29m\nzk-0      0\/1       Running   1         29m\nzk-0      1\/1       Running   1         29m\n<\/pre>\n<\/div>\n<p>\u5982\u679c\u4f60\u7684\u5e94\u7528\u4f7f\u7528\u4e00\u4e2a\u811a\u672c\uff08\u4f8b\u5982 zkServer.sh\uff09\u6765\u542f\u52a8\u4e00\u4e2a\u5b9e\u73b0\u4e86\u5e94\u7528\u4e1a\u52a1\u903b\u8f91\u7684\u8fdb\u7a0b\uff0c\u8fd9\u4e2a\u811a\u672c\u5fc5\u987b\u548c\u5b50\u8fdb\u7a0b\u4e00\u8d77\u7ed3\u675f\u3002\u8fd9\u4fdd\u8bc1\u4e86\u5f53\u5b9e\u73b0\u5e94\u7528\u4e1a\u52a1\u903b\u8f91\u7684\u8fdb\u7a0b\u6545\u969c\u65f6\uff0cKubernetes \u4f1a\u91cd\u542f\u8fd9\u4e2a\u5e94\u7528\u7684\u5bb9\u5668\u3002<br \/>\n\u4f60\u7684\u5e94\u7528\u914d\u7f6e\u4e3a\u81ea\u52a8\u91cd\u542f\u6545\u969c\u8fdb\u7a0b\uff0c\u4f46\u8fd9\u5bf9\u4e8e\u4fdd\u6301\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5065\u5eb7\u6765\u8bf4\u662f\u4e0d\u591f\u7684\u3002\u8bb8\u591a\u573a\u666f\u4e0b\uff0c\u4e00\u4e2a\u7cfb\u7edf\u8fdb\u7a0b\u53ef\u4ee5\u662f\u6d3b\u52a8\u72b6\u6001\u4f46\u4e0d\u54cd\u5e94\u8bf7\u6c42\uff0c\u6216\u8005\u662f\u4e0d\u5065\u5eb7\u72b6\u6001\u3002\u4f60\u5e94\u8be5\u4f7f\u7528 liveness probes \u6765\u901a\u77e5 Kubernetes \u4f60\u7684\u5e94\u7528\u8fdb\u7a0b\u5904\u4e8e\u4e0d\u5065\u5eb7\u72b6\u6001\uff0c\u9700\u8981\u88ab\u91cd\u542f\u3002<br \/>\nzk\u00a0StatefulSet \u7684 Pod \u7684\u00a0template\u00a0\u4e00\u8282\u6307\u5b9a\u4e86\u4e00\u4e2a liveness probe\u3002<\/p>\n<div>\n<pre> livenessProbe:\n          exec:\n            command:\n            - \\\"zkOk.sh\\\"\n          initialDelaySeconds: 15\n          timeoutSeconds: 5\n<\/pre>\n<\/div>\n<p>\u8fd9\u4e2a\u63a2\u9488\u8c03\u7528\u4e00\u4e2a\u7b80\u5355\u7684 bash \u811a\u672c\uff0c\u4f7f\u7528 ZooKeeper \u7684\u56db\u5b57\u7f29\u5199\u00a0ruok\u00a0\u6765\u6d4b\u8bd5\u670d\u52a1\u7684\u5065\u5eb7\u72b6\u6001\u3002<\/p>\n<div>\n<pre>ZK_CLIENT_PORT=${ZK_CLIENT_PORT:-2181}\nOK=$(echo ruok | nc 127.0.0.1 $ZK_CLIENT_PORT)\nif [ \\\"$OK\\\" == \\\"imok\\\" ]; then\n    exit 0\nelse\n    exit 1\nfi\n<\/pre>\n<\/div>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u89c2\u5bdf\u00a0zk\u00a0StatefulSet \u4e2d\u7684 Pods\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7a97\u53e3\u4e2d\uff0c\u4ece Pod\u00a0zk-0\u00a0\u7684\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5220\u9664\u00a0zkOk.sh\u00a0\u811a\u672c\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 -- rm \/opt\/zookeeper\/bin\/zkOk.sh\n<\/pre>\n<\/div>\n<p>\u5f53 ZooKeeper \u8fdb\u7a0b\u7684 liveness probe \u5931\u8d25\u65f6\uff0cKubernetes \u5c06\u4f1a\u4e3a\u4f60\u81ea\u52a8\u91cd\u542f\u8fd9\u4e2a\u8fdb\u7a0b\uff0c\u4ece\u800c\u4fdd\u8bc1 ensemble \u4e2d\u4e0d\u5065\u5eb7\u72b6\u6001\u7684\u8fdb\u7a0b\u90fd\u88ab\u91cd\u542f\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=zk\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      1\/1       Running   0          1h\nzk-1      1\/1       Running   0          1h\nzk-2      1\/1       Running   0          1h\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      0\/1       Running   0          1h\nzk-0      0\/1       Running   1         1h\nzk-0      1\/1       Running   1         1h\n<\/pre>\n<\/div>\n<h3 id=\\\"\u53ef\u8bfb\u6027\u6d4b\u8bd5\\\">\u53ef\u8bfb\u6027\u6d4b\u8bd5<\/h3>\n<p>\u53ef\u8bfb\u6027\u4e0d\u540c\u4e8e\u5b58\u6d3b\u6027\u3002\u5982\u679c\u4e00\u4e2a\u8fdb\u7a0b\u662f\u5b58\u6d3b\u7684\uff0c\u5b83\u662f\u53ef\u8c03\u5ea6\u548c\u5065\u5eb7\u7684\u3002\u5982\u679c\u4e00\u4e2a\u8fdb\u7a0b\u662f\u5c31\u7eea\u7684\uff0c\u5b83\u5e94\u8be5\u80fd\u591f\u5904\u7406\u8f93\u5165\u3002\u5b58\u6d3b\u6027\u662f\u53ef\u8bfb\u6027\u7684\u5fc5\u8981\u975e\u5145\u5206\u6761\u4ef6\u3002\u5728\u8bb8\u591a\u573a\u666f\u4e0b\uff0c\u7279\u522b\u662f\u521d\u59cb\u5316\u548c\u7ec8\u6b62\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u662f\u5b58\u6d3b\u4f46\u6ca1\u6709\u5c31\u7eea\u3002<br \/>\n\u5982\u679c\u4f60\u6307\u5b9a\u4e86\u4e00\u4e2a\u53ef\u8bfb\u6027\u63a2\u9488\uff0cKubernetes\u5c06\u4fdd\u8bc1\u5728\u53ef\u8bfb\u6027\u68c0\u67e5\u901a\u8fc7\u4e4b\u524d\uff0c\u4f60\u7684\u5e94\u7528\u4e0d\u4f1a\u63a5\u6536\u5230\u7f51\u7edc\u6d41\u91cf\u3002<br \/>\n\u5bf9\u4e8e\u4e00\u4e2a ZooKeeper \u670d\u52a1\u6765\u8bf4\uff0c\u5b58\u6d3b\u6027\u5b9e\u73b0\u4e86\u53ef\u8bfb\u6027\u3002\u56e0\u6b64\u00a0zookeeper.yaml\u00a0\u6e05\u5355\u4e2d\u7684\u53ef\u8bfb\u6027\u63a2\u9488\u548c\u5b58\u6d3b\u6027\u63a2\u9488\u5b8c\u5168\u76f8\u540c\u3002<\/p>\n<div>\n<pre> readinessProbe:\n          exec:\n            command:\n            - \\\"zkOk.sh\\\"\n          initialDelaySeconds: 15\n          timeoutSeconds: 5\n<\/pre>\n<\/div>\n<p>\u867d\u7136\u5b58\u6d3b\u6027\u63a2\u9488\u548c\u53ef\u8bfb\u6027\u63a2\u9488\u662f\u76f8\u540c\u7684\uff0c\u4f46\u540c\u65f6\u6307\u5b9a\u5b83\u4eec\u4e24\u8005\u4ecd\u7136\u91cd\u8981\u3002\u8fd9\u4fdd\u8bc1\u4e86 ZooKeeper ensemble \u4e2d\u552f\u4e00\u5065\u5eb7\u7684\u670d\u52a1\u80fd\u591f\u63a5\u6536\u7f51\u7edc\u6d41\u91cf\u3002<\/p>\n<h2 id=\\\"\u5bb9\u5fcd\u8282\u70b9\u6545\u969c\\\">\u5bb9\u5fcd\u8282\u70b9\u6545\u969c<\/h2>\n<p>ZooKeeper \u9700\u8981\u4e00\u4e2a\u670d\u52a1\u7684 quorum \u6765\u6210\u529f\u7684\u63d0\u4ea4\u6570\u636e\u53d8\u52a8\u3002\u5bf9\u4e8e\u4e00\u4e2a 3 \u4e2a\u670d\u52a1\u7684 ensemble\uff0c\u5fc5\u987b\u6709\u4e24\u4e2a\u662f\u5065\u5eb7\u7684\u5199\u5165\u624d\u80fd\u6210\u529f\u3002\u5728\u57fa\u4e8e quorum \u7684\u7cfb\u7edf\u91cc\uff0c\u6210\u5458\u88ab\u90e8\u7f72\u5728\u6545\u969c\u57df\u4e4b\u95f4\u4ee5\u4fdd\u8bc1\u53ef\u7528\u6027\u3002\u4e3a\u4e86\u9632\u6b62\u7531\u4e8e\u67d0\u53f0\u673a\u5668\u65ad\u8fde\u5f15\u8d77\u670d\u52a1\u4e2d\u65ad\uff0c\u6700\u4f73\u5b9e\u8df5\u662f\u9632\u6b62\u5e94\u7528\u7684\u591a\u4e2a\u793a\u4f8b\u5728\u76f8\u540c\u7684\u673a\u5668\u4e0a\u5171\u5b58\u3002<br \/>\n\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cKubernetes \u53ef\u4ee5\u628a StatefulSet \u7684 Pods \u90e8\u7f72\u5728\u76f8\u540c\u8282\u70b9\u4e0a\u3002\u5bf9\u4e8e\u4f60\u521b\u5efa\u7684 3 \u4e2a\u670d\u52a1\u7684 ensemble \u6765\u8bf4\uff0c\u5982\u679c\u6709\u4e24\u4e2a\u670d\u52a1\u5e76\u5b58\u4e8e\u76f8\u540c\u7684\u8282\u70b9\u4e0a\u5e76\u4e14\u8be5\u8282\u70b9\u53d1\u751f\u6545\u969c\u65f6\uff0c\u4f60\u7684 ZooKeeper \u670d\u52a1\u5ba2\u6237\u7aef\u5c06\u4e0d\u80fd\u4f7f\u7528\u670d\u52a1\uff0c\u81f3\u5c11\u4e00\u4e2a Pods \u88ab\u91cd\u65b0\u8c03\u5ea6\u540e\u624d\u80fd\u6062\u590d\u3002<br \/>\n\u4f60\u5e94\u8be5\u603b\u662f\u63d0\u4f9b\u989d\u5916\u7684\u5bb9\u91cf\u4ee5\u5141\u8bb8\u5173\u952e\u7cfb\u7edf\u8fdb\u7a0b\u5728\u8282\u70b9\u6545\u969c\u65f6\u80fd\u591f\u88ab\u91cd\u65b0\u8c03\u5ea6\u3002\u5982\u679c\u4f60\u8fd9\u6837\u505a\u4e86\uff0c\u670d\u52a1\u6545\u969c\u5c31\u53ea\u4f1a\u6301\u7eed\u5230 Kubernetes \u8c03\u5ea6\u5668\u91cd\u65b0\u8c03\u5ea6 ZooKeeper \u670d\u52a1\u4e4b\u524d\u3002\u4f46\u662f\uff0c\u5982\u679c\u5e0c\u671b\u4f60\u7684\u670d\u52a1\u5728\u5bb9\u5fcd\u8282\u70b9\u6545\u969c\u65f6\u65e0\u505c\u670d\u65f6\u95f4\uff0c\u4f60\u5e94\u8be5\u8bbe\u7f6e\u00a0podAntiAffinity\u3002<br \/>\n\u83b7\u53d6\u00a0zk\u00a0Stateful Set \u4e2d\u7684 Pods \u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do kubectl get pod zk-$i --template {{.spec.nodeName}}; echo \\\"\\\"; done\n<\/pre>\n<\/div>\n<p>zk\u00a0StatefulSe \u4e2d\u6240\u6709\u7684 Pods \u90fd\u88ab\u90e8\u7f72\u5728\u4e0d\u540c\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubernetes-minion-group-cxpk\nkubernetes-minion-group-a5aq\nkubernetes-minion-group-2g2d\n<\/pre>\n<\/div>\n<p>\u8fd9\u662f\u56e0\u4e3a\u00a0zk\u00a0StatefulSet \u4e2d\u7684 Pods \u6307\u5b9a\u4e86 PodAntiAffinity\u3002<\/p>\n<div>\n<pre>      affinity:\n        podAntiAffinity:\n          requiredDuringSchedulingIgnoredDuringExecution:\n            - labelSelector:\n                matchExpressions:\n                  - key: \\\"app\\\"\n                    operator: In\n                    values:\n                    - zk\n              topologyKey: \\\"kubernetes.io\/hostname\\\"\n<\/pre>\n<\/div>\n<p>requiredDuringSchedulingRequiredDuringExecution\u00a0\u544a\u8bc9 Kubernetes \u8c03\u5ea6\u5668\uff0c\u5728\u4ee5\u00a0topologyKey\u00a0\u6307\u5b9a\u7684\u57df\u4e2d\uff0c\u7edd\u5bf9\u4e0d\u8981\u628a\u5e26\u6709\u952e\u4e3a\u00a0app\uff0c\u503c\u4e3a\u00a0zk\u00a0\u7684\u6807\u7b7e\u7684\u4e24\u4e2a Pods \u8c03\u5ea6\u5230\u76f8\u540c\u7684\u8282\u70b9\u3002topologyKey\u00a0kubernetes.io\/hostname\u00a0\u8868\u793a\u8fd9\u4e2a\u57df\u662f\u4e00\u4e2a\u5355\u72ec\u7684\u8282\u70b9\u3002\u4f7f\u7528\u4e0d\u540c\u7684 rules\u3001labels \u548c selectors\uff0c\u4f60\u80fd\u591f\u901a\u8fc7\u8fd9\u79cd\u6280\u672f\u628a\u4f60\u7684 ensemble \u5728\u7269\u7406\u3001\u7f51\u7edc\u548c\u7535\u529b\u6545\u969c\u57df\u4e4b\u95f4\u5206\u5e03\u3002<\/p>\n<h2 id=\\\"\u5b58\u6d3b\u7ba1\u7406\\\">\u5b58\u6d3b\u7ba1\u7406<\/h2>\n<p>\u5728\u672c\u8282\u4e2d\u4f60\u5c06\u4f1a cordon \u548c drain \u8282\u70b9\u3002\u5982\u679c\u4f60\u662f\u5728\u4e00\u4e2a\u5171\u4eab\u7684\u96c6\u7fa4\u91cc\u4f7f\u7528\u672c\u6559\u7a0b\uff0c\u8bf7\u4fdd\u8bc1\u4e0d\u4f1a\u5f71\u54cd\u5230\u5176\u4ed6\u79df\u6237<br \/>\n\u4e0a\u4e00\u5c0f\u8282\u5c55\u793a\u4e86\u5982\u4f55\u5728\u8282\u70b9\u4e4b\u95f4\u5206\u6563 Pods \u4ee5\u5728\u8ba1\u5212\u5916\u7684\u8282\u70b9\u6545\u969c\u65f6\u5b58\u6d3b\u3002\u4f46\u662f\u4f60\u4e5f\u9700\u8981\u4e3a\u8ba1\u5212\u5185\u7ef4\u62a4\u5f15\u8d77\u7684\u4e34\u65f6\u8282\u70b9\u6545\u969c\u505a\u51c6\u5907\u3002<br \/>\n\u83b7\u53d6\u4f60\u96c6\u7fa4\u4e2d\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl get nodes\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#cordon\\\">kubectl cordon<\/a>\u00a0cordon \u4f60\u7684\u96c6\u7fa4\u4e2d\u96644\u4e2a\u8282\u70b9\u4ee5\u5916\u7684\u6240\u6709\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl cordon &lt; node name &gt;\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6\u00a0zk-budget\u00a0PodDisruptionBudget\u3002<\/p>\n<div>\n<pre>kubectl get poddisruptionbudget zk-budget\n<\/pre>\n<\/div>\n<p>min-available\u00a0\u5b57\u6bb5\u6307\u793a Kubernetes \u5728\u4efb\u4f55\u65f6\u5019\uff0czk\u00a0StatefulSet \u81f3\u5c11\u6709\u4e24\u4e2a Pods \u5fc5\u987b\u662f\u53ef\u7528\u7684\u3002<\/p>\n<div>\n<pre>NAME        MIN-AVAILABLE   ALLOWED-DISRUPTIONS   AGE\nzk-budget   2               1                     1h\n<\/pre>\n<\/div>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u89c2\u5bdf\u00a0zk\u00a0StatefulSet \u4e2d\u7684 Pods\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u83b7\u53d6 Pods \u5f53\u524d\u8c03\u5ea6\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>for i in 0 1 2; do kubectl get pod zk-$i --template {{.spec.nodeName}}; echo \\\"\\\"; done\nkubernetes-minion-group-pb41\nkubernetes-minion-group-ixsl\nkubernetes-minion-group-i4c4\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#drain\\\">kubectl drain<\/a>\u00a0\u6765 cordon \u548c drain\u00a0zk-0\u00a0Pod \u8c03\u5ea6\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl drain $(kubectl get pod zk-0 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data\nnode \\\"kubernetes-minion-group-pb41\\\" cordoned\nWARNING: Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-pb41, kube-proxy-kubernetes-minion-group-pb41; Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-o5elz\npod \\\"zk-0\\\" deleted\nnode \\\"kubernetes-minion-group-pb41\\\" drained\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u4f60\u7684\u96c6\u7fa4\u4e2d\u67094\u4e2a\u8282\u70b9,\u00a0kubectl drain\u00a0\u6267\u884c\u6210\u529f\uff0c`zk-0 \u88ab\u8c03\u5ea6\u5230\u5176\u5b83\u8282\u70b9\u3002<\/p>\n<pre>NAME      READY     STATUS    RESTARTS   AGE\nzk-0      1\/1       Running   2          1h\nzk-1      1\/1       Running   0          1h\nzk-2      1\/1       Running   0          1h\nNAME      READY     STATUS        RESTARTS   AGE\nzk-0      1\/1       Terminating   2          2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         51s\nzk-0      1\/1       Running   0         1m\n<\/pre>\n<p>\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u6301\u7eed\u89c2\u5bdf StatefulSet \u7684 Pods\u5e76 drain\u00a0zk-1\u00a0\u8c03\u5ea6\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl drain $(kubectl get pod zk-1 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data \\\"kubernetes-minion-group-ixsl\\\" cordoned\nWARNING: Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-ixsl, kube-proxy-kubernetes-minion-group-ixsl; Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-voc74\npod \\\"zk-1\\\" deleted\nnode \\\"kubernetes-minion-group-ixsl\\\" drained\n<\/pre>\n<\/div>\n<p>zk-1\u00a0Pod \u4e0d\u80fd\u88ab\u8c03\u5ea6\u3002\u7531\u4e8e\u00a0zk\u00a0StatefulSet \u5305\u542b\u4e86\u4e00\u4e2a\u9632\u6b62 Pods \u5171\u5b58\u7684 PodAntiAffinity \u89c4\u5219\uff0c\u800c\u4e14\u53ea\u6709\u4e24\u4e2a\u8282\u70b9\u53ef\u7528\u4e8e\u8c03\u5ea6\uff0c\u8fd9\u4e2a Pod \u5c06\u4fdd\u6301\u5728 Pending \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      1\/1       Running   2          1h\nzk-1      1\/1       Running   0          1h\nzk-2      1\/1       Running   0          1h\nNAME      READY     STATUS        RESTARTS   AGE\nzk-0      1\/1       Terminating   2          2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         51s\nzk-0      1\/1       Running   0         1m\nzk-1      1\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         0s\n<\/pre>\n<\/div>\n<p>\u7ee7\u7eed\u89c2\u5bdf stateful set \u7684 Pods \u5e76 drain\u00a0zk-2\u00a0\u8c03\u5ea6\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl drain $(kubectl get pod zk-2 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data\nnode \\\"kubernetes-minion-group-i4c4\\\" cordoned\nWARNING: Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-i4c4, kube-proxy-kubernetes-minion-group-i4c4; Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-dyrog\nWARNING: Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-dyrog; Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-i4c4, kube-proxy-kubernetes-minion-group-i4c4\nThere are pending pods when an error occurred: Cannot evict pod as it would violate the pod\\'s disruption budget.\npod\/zk-2\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0CRTL-C\u00a0\u7ec8\u6b62 kubectl\u3002<br \/>\n\u4f60\u4e0d\u80fd drain \u7b2c\u4e09\u4e2a\u8282\u70b9\uff0c\u56e0\u4e3a\u5220\u9664\u00a0zk-2\u00a0\u5c06\u548c\u00a0zk-budget\u00a0\u51b2\u7a81\u3002\u7136\u800c\u8fd9\u4e2a\u8282\u70b9\u4ecd\u7136\u4fdd\u6301 cordoned\u3002<br \/>\n\u4f7f\u7528\u00a0zkCli.sh\u00a0\u4ece\u00a0zk-0\u00a0\u53d6\u56de\u4f60\u7684\u5065\u5eb7\u68c0\u67e5\u4e2d\u8f93\u5165\u7684\u6570\u503c\u3002<\/p>\n<div>\n<pre>kubectl exec zk-0 zkCli.sh get \/hello\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u9075\u5b88\u4e86 PodDisruptionBudget\uff0c\u670d\u52a1\u4ecd\u7136\u53ef\u7528\u3002<\/p>\n<pre>WatchedEvent state:SyncConnected type:None path:null\nworld\ncZxid = 0x200000002\nctime = Wed Dec 07 00:08:59 UTC 2016\nmZxid = 0x200000002\nmtime = Wed Dec 07 00:08:59 UTC 2016\npZxid = 0x200000002\ncversion = 0\ndataVersion = 0\naclVersion = 0\nephemeralOwner = 0x0\ndataLength = 5\nnumChildren = 0\n<\/pre>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#uncordon\\\">kubectl uncordon<\/a>\u00a0\u6765\u53d6\u6d88\u5bf9\u7b2c\u4e00\u4e2a\u8282\u70b9\u7684\u9694\u79bb\u3002<\/p>\n<div>\n<pre>kubectl uncordon kubernetes-minion-group-pb41\nnode \\\"kubernetes-minion-group-pb41\\\" uncordoned\n<\/pre>\n<\/div>\n<p>zk-1\u00a0\u88ab\u91cd\u65b0\u8c03\u5ea6\u5230\u4e86\u8fd9\u4e2a\u8282\u70b9\u3002\u7b49\u5f85\u00a0zk-1\u00a0\u53d8\u4e3a Running \u548c Ready \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=zk\nNAME      READY     STATUS    RESTARTS   AGE\nzk-0      1\/1       Running   2          1h\nzk-1      1\/1       Running   0          1h\nzk-2      1\/1       Running   0          1h\nNAME      READY     STATUS        RESTARTS   AGE\nzk-0      1\/1       Terminating   2          2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Terminating   2         2h\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       Pending   0         0s\nzk-0      0\/1       ContainerCreating   0         0s\nzk-0      0\/1       Running   0         51s\nzk-0      1\/1       Running   0         1m\nzk-1      1\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Terminating   0         2h\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         0s\nzk-1      0\/1       Pending   0         12m\nzk-1      0\/1       ContainerCreating   0         12m\nzk-1      0\/1       Running   0         13m\nzk-1      1\/1       Running   0         13m\n<\/pre>\n<\/div>\n<p>\u5c1d\u8bd5 drain\u00a0zk-2\u00a0\u8c03\u5ea6\u7684\u8282\u70b9\u3002<\/p>\n<div>\n<pre>kubectl drain $(kubectl get pod zk-2 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data\nnode \\\"kubernetes-minion-group-i4c4\\\" already cordoned\nWARNING: Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-i4c4, kube-proxy-kubernetes-minion-group-i4c4; Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-dyrog\npod \\\"heapster-v1.2.0-2604621511-wht1r\\\" deleted\npod \\\"zk-2\\\" deleted\nnode \\\"kubernetes-minion-group-i4c4\\\" drained\n<\/pre>\n<\/div>\n<p>\u8fd9\u6b21\u00a0kubectl drain\u00a0\u6267\u884c\u6210\u529f\u3002<br \/>\nUncordon \u7b2c\u4e8c\u4e2a\u8282\u70b9\u4ee5\u5141\u8bb8\u00a0zk-2\u00a0\u88ab\u91cd\u65b0\u8c03\u5ea6\u3002<\/p>\n<div>\n<pre>kubectl uncordon kubernetes-minion-group-ixsl\nnode \\\"kubernetes-minion-group-ixsl\\\" uncordoned\n<\/pre>\n<\/div>\n<p>\u4f60\u53ef\u4ee5\u540c\u65f6\u4f7f\u7528\u00a0kubectl drain\u00a0\u548c PodDisruptionBudgets \u6765\u4fdd\u8bc1\u4f60\u7684\u670d\u52a1\u5728\u7ef4\u62a4\u8fc7\u7a0b\u4e2d\u4ecd\u7136\u53ef\u7528\u3002\u5982\u679c\u4f7f\u7528 drain \u6765\u9694\u79bb\u8282\u70b9\u5e76\u5728\u6b64\u4e4b\u524d\u5220\u9664 pods \u4f7f\u8282\u70b9\u8fdb\u5165\u79bb\u7ebf\u7ef4\u62a4\u72b6\u6001\uff0c\u5982\u679c\u670d\u52a1\u8868\u8fbe\u4e86 disruption budget\uff0c\u8fd9\u4e2a budget \u5c06\u88ab\u9075\u5b88\u3002\u4f60\u5e94\u8be5\u603b\u662f\u4e3a\u5173\u952e\u670d\u52a1\u5206\u914d\u989d\u5916\u5bb9\u91cf\uff0c\u8fd9\u6837\u5b83\u4eec\u7684 Pods \u5c31\u80fd\u591f\u8fc5\u901f\u7684\u91cd\u65b0\u8c03\u5ea6\u3002<\/p>\n<h2 id=\\\"\u6e05\u7406\u73b0\u573a\\\">\u6e05\u7406\u73b0\u573a<\/h2>\n<ul>\n<li>\u4f7f\u7528\u00a0kubectl uncordon\u00a0\u89e3\u9664\u4f60\u96c6\u7fa4\u4e2d\u6240\u6709\u8282\u70b9\u7684\u9694\u79bb\u3002<\/li>\n<li>\u4f60\u9700\u8981\u5220\u9664\u5728\u672c\u6559\u7a0b\u4e2d\u4f7f\u7528\u7684 PersistentVolumes \u7684\u6301\u4e45\u5b58\u50a8\u5a92\u4ecb\u3002\u8bf7\u9075\u5faa\u5fc5\u987b\u7684\u6b65\u9aa4\uff0c\u57fa\u4e8e\u4f60\u7684\u73af\u5883\u3001\u5b58\u50a8\u914d\u7f6e\u548c\u51c6\u5907\u65b9\u6cd5\uff0c\u4fdd\u8bc1\u56de\u6536\u6240\u6709\u7684\u5b58\u50a8\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Kubernetes \u4e0a\u4f7f\u7528 PodDisruptionBudgets\u00a0\u548c\u00a0PodAntiAffinity &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1631\"> <span class=\"screen-reader-text\">kubernetes \u90e8\u7f72\u5e76\u8fd0\u884c ZooKeeper\u96c6\u7fa4<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[104,123],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u5728 Kubernetes \u4e0a\u4f7f\u7528 PodDisruptionBudgets\u00a0\u548c\u00a0PodAntiAffinity&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1631"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1631"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1631\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1631"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}