参考 https://kubernetes.io/docs/tutorials/stateful-application/zookeeper/# kubectl apply -f statefulse
参考 https://kubernetes.io/docs/tutorials/stateful-application/zookeeper/
# kubectl apply -f statefulset_zk.yaml
service "zk-headless" createdconfigmap "zk-config" createdpoddisruptionbudget "zk-budget" createdstatefulset "zk" created# cat statefulset_zk.yaml
apiVersion: v1kind: Servicemetadata: name: zk-headless labels: app: zk-headlessspec: ports: - port: 2888 name: server - port: 3888 name: leader-election clusterIP: None selector: app: zk---apiVersion: v1kind: ConfigMapmetadata: name: zk-configdata: ensemble: "zk-0;zk-1;zk-2" jvm.heap: "2G" tick: "2000" init: "10" sync: "5" client.cnxns: "60" snap.retain: "3" purge.interval: "1"---apiVersion: policy/v1beta1kind: PodDisruptionBudgetmetadata: name: zk-budgetspec: selector: matchLabels: app: zk minAvailable: 2---apiVersion: apps/v1beta1kind: StatefulSetmetadata: name: zkspec: serviceName: zk-headless replicas: 3 template: metadata: labels: app: zk annotations: pod.alpha.kubernetes.io/initialized: "true" spec: containers: - name: k8szk imagePullPolicy: Always image: gcr.io/google_samples/k8szk:v1 resources: requests: memory: "4Gi" cpu: "1" ports: - containerPort: 2181 name: client - containerPort: 2888 name: server - containerPort: 3888 name: leader-election env: - name : ZK_ENSEMBLE valueFrom: configMapKeyRef: name: zk-config key: ensemble - name : ZK_HEAP_SIZE valueFrom: configMapKeyRef: name: zk-config key: jvm.heap - name : ZK_TICK_TIME valueFrom: configMapKeyRef: name: zk-config key: tick - name : ZK_INIT_LIMIT valueFrom: configMapKeyRef: name: zk-config key: init - name : ZK_SYNC_LIMIT valueFrom: configMapKeyRef: name: zk-config key: tick - name : ZK_MAX_CLIENT_CNXNS valueFrom: configMapKeyRef: name: zk-config key: client.cnxns - name: ZK_SNAP_RETAIN_COUNT valueFrom: configMapKeyRef: name: zk-config key: snap.retain - name: ZK_PURGE_INTERVAL valueFrom: configMapKeyRef: name: zk-config key: purge.interval - name: ZK_CLIENT_PORT value: "2181" - name: ZK_SERVER_PORT value: "2888" - name: ZK_ELECTION_PORT value: "3888" command: - sh - -c - zkGenConfig.sh && zkServer.sh start-foreground readinessProbe: exec: command: - "zkOk.sh" initialDelaySeconds: 15 timeoutSeconds: 5 livenessProbe: exec: command: - "zkOk.sh" initialDelaySeconds: 15 timeoutSeconds: 5 volumeMounts: - name: zkdatadir mountPath: /var/lib/zookeeper securityContext:#官网写的是用uid1000，但实际这个目录属主是root，所以设成root，不然创建不了配置文件，zkGenConfig.sh脚本返回1 runAsUser: 0 fsGroup: 0 volumeClaimTemplates: - metadata: name: zkdatadir annotations:#不能使用volume.aplha.kubernetes.io/storage-class，查看events疑似aplha版本没glusterfs插件 volume.beta.kubernetes.io/storage-class: "gfs1" spec: accessModes: [ "ReadWriteOnce" ] resources: requests: storage: 2Gi