#部署 Service Headless，用于Zookeeper间相互通信
apiVersion: v1
kind: Service
metadata:
  name: zookeeper-headless
  labels:
    app: zookeeper
spec:
  type: ClusterIP
  clusterIP: None
  publishNotReadyAddresses: true
  ports:
  - name: client
    port: 2181
    targetPort: client
  - name: follower
    port: 2888
    targetPort: follower
  - name: election
    port: 3888
    targetPort: election
  selector:
    app: zookeeper
---
#部署 Service，用于外部访问 Zookeeper
apiVersion: v1
kind: Service
metadata:
  name: zookeeper
  labels:
    app: zookeeper
spec:
  type: ClusterIP
  ports:
  - name: client
    port: 2181
    targetPort: client
  - name: follower
    port: 2888
    targetPort: follower
  - name: election
    port: 3888
    targetPort: election
  selector:
    app: zookeeper
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zookeeper
  labels:
    app: zookeeper
spec:
  serviceName: zookeeper-headless
  replicas: 3
  podManagementPolicy: Parallel
  updateStrategy:
    type: RollingUpdate
  selector:
    matchLabels:
      app: zookeeper
  template:
    metadata:
      name: zookeeper
      labels:
        app: zookeeper
    spec:      
      securityContext:
        fsGroup: 1001
      containers:
      - name: zookeeper
        image: docker.io/bitnami/zookeeper:3.4.14-debian-9-r25
        imagePullPolicy: IfNotPresent
        securityContext:
          runAsUser: 1001
        command:
         - bash
         - -ec
         - |
            # Execute entrypoint as usual after obtaining ZOO_SERVER_ID based on POD hostname
            HOSTNAME=`hostname -s`
            if [[ $HOSTNAME =~ (.*)-([0-9]+)$ ]]; then
              ORD=${BASH_REMATCH[2]}
              export ZOO_SERVER_ID=$((ORD+1))
            else
              echo "Failed to get index from hostname $HOST"
              exit 1
            fi
            . /opt/bitnami/base/functions
            . /opt/bitnami/base/helpers
            print_welcome_page
            . /init.sh
            nami_initialize zookeeper
            exec tini -- /run.sh
        resources: 
          limits:
            cpu: 500m
            memory: 512Mi
          requests:
            cpu: 250m
            memory: 256Mi
        env:
        - name: ZOO_PORT_NUMBER
          value: "2181"
        - name: ZOO_TICK_TIME
          value: "2000"
        - name: ZOO_INIT_LIMIT
          value: "10"
        - name: ZOO_SYNC_LIMIT
          value: "5"
        - name: ZOO_MAX_CLIENT_CNXNS
          value: "60"
        - name: ZOO_SERVERS
          value: "
                  zookeeper-0.zookeeper-headless:2888:3888,
                  zookeeper-1.zookeeper-headless:2888:3888,
                  zookeeper-2.zookeeper-headless:2888:3888
                 "
        - name: ZOO_ENABLE_AUTH
          value: "no"
        - name: ZOO_HEAP_SIZE
          value: "1024"
        - name: ZOO_LOG_LEVEL
          value: "ERROR"
        - name: ALLOW_ANONYMOUS_LOGIN
          value: "yes"
        ports:
        - name: client
          containerPort: 2181
        - name: follower
          containerPort: 2888
        - name: election
          containerPort: 3888
        livenessProbe:
          tcpSocket:
            port: client
          initialDelaySeconds: 30
          periodSeconds: 10
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 6
        readinessProbe:
          tcpSocket:
            port: client
          initialDelaySeconds: 5
          periodSeconds: 10
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 6
        volumeMounts:
        - name: data
          mountPath: /bitnami/zookeeper
  volumeClaimTemplates:
    - metadata:
        name: data
        annotations:
      spec:
        storageClassName: nfs-storage
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 5Gi