k8s 部署zookeeper集群

 zk清单

apiVersion: v1
kind: ConfigMap
metadata:
  name: zookeeper-config
  namespace: app
data:
  zoo.cfg: |
    tickTime=5000
    initLimit=10
    syncLimit=5
    dataDir=/data
    clientPort=2181
    autopurge.snapRetainCount=3
    #zookeeper.electionPortBindRetry=10
    autopurge.purgeInterval=1
    server.0=zookeeper-cluster-0.zookeeper-headless.app.svc.cluster.local:2888:3888   # 标黄的部分对应myid
    server.1=zookeeper-cluster-1.zookeeper-headless.app.svc.cluster.local:2888:3888
    server.2=zookeeper-cluster-2.zookeeper-headless.app.svc.cluster.local:2888:3888

---
apiVersion: v1
kind: Service
metadata:
  name: zookeeper-headless
  namespace: app
  labels:
    app: zookeeper
spec:
  ports:
    - name: client
      port: 2181
      targetPort: 2181
    - name: quorum
      port: 2888
      targetPort: 2888
    - name: leader-election
      port: 3888
      targetPort: 3888
  clusterIP: None
  selector:
    app: zookeeper

---
kind: Service
apiVersion: v1
metadata:
  name: zk-external
  namespace: app
  labels:
    app: zookeeper
spec:
  type: NodePort
  ports:
  - name: http
    port: 2181
    protocol: TCP
    targetPort: 2181
    nodePort:
  selector:
    app: zookeeper

---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zookeeper-cluster
  namespace: app
  labels:
    app: zookeeper
spec:
  serviceName: zookeeper-headless
  replicas: 3
  selector:
    matchLabels:
      app: zookeeper
  template:
    metadata:
      labels:
        app: zookeeper
    spec:
      initContainers:
        - name: init-myid
          image: xx:10006/k8s/busybox:1.28
          imagePullPolicy: IfNotPresent
          command:
            - sh
            - -c
            - |
              echo $((`hostname | awk -F '-' '{print $3}'`)) > /data/myid  # 对应配置文件的server.x
          volumeMounts:
            - name: data
              mountPath: /data     # 共享pvc
      containers:
        - name: zookeeper-cluster
          image: zookeeper:latest
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 2181
              name: client
            - containerPort: 2888
              name: quorum
            - containerPort: 3888
              name: leader-election
          volumeMounts:
            - name: data
              mountPath: /data   # 共享初始化镜像存储
            - name: config
              mountPath: /conf   # 此目录是zk镜像的变量ZOOCFGDIR=/conf
            #- name: config
            #  mountPath: /apache-zookeeper-3.9.3-bin/conf
      volumes:
        - name: config
          configMap:
            name: zookeeper-config
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes: [ "ReadWriteOnce" ]
        resources:
          requests:
            storage: 1Gi

 部署查看状态

root@zookeeper-cluster-0:/apache-zookeeper-3.9.3-bin/bin# cat /data/myid
0]# kubectl exec -it -n app zookeeper-cluster-1 --   cat /data/myid
1]# kubectl exec -it -n app zookeeper-cluster-2 --   cat /data/myid
2]# kubectl exec -it -n app zookeeper-cluster-2 --   /apache-zookeeper-3.9.3-bin/bin/zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader
]# kubectl exec -it -n app zookeeper-cluster-1 --   /apache-zookeeper-3.9.3-bin/bin/zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower
]# kubectl exec -it -n app zookeeper-cluster-0 --   /apache-zookeeper-3.9.3-bin/bin/zkServer.sh  status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower

查看pod,svc

]# kubectl  get pod,svc -n app
NAME                           READY   STATUS    RESTARTS   AGE
pod/backend-84885dc4fb-pzkjr   1/1     Running   5          40h
pod/zookeeper-cluster-0        1/1     Running   0          5m16s
pod/zookeeper-cluster-1        1/1     Running   0          5m10s
pod/zookeeper-cluster-2        1/1     Running   0          5m5s

NAME                         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)                      AGE
service/backend-svc          NodePort    10.0.87.216   <none>        80:38248/TCP,443:39271/TCP   41h
service/zk-external          NodePort    10.0.7.66     <none>        2181:37659/TCP               7s
service/zookeeper-headless   ClusterIP   None          <none>        2181/TCP,2888/TCP,3888/TCP   5m16s

客户端连接