zk-client-svc.yml

apiVersion: v1
kind: Service
metadata:
  name: zk-client-svc
  namespace: core-applications
spec:
  ports:
  - port: 2181
    name: tcp
  selector:
    app: zk

zk-headless-svc.yml

apiVersion: v1
kind: Service
metadata:
  name: zk-headless
  namespace: core-applications
  labels:
    app: zk-headless
spec:
  ports:
  - port: 2888
    name: tcp-server
  - port: 3888
    name: tcp-leader-elec
  clusterIP: None
  selector:
    app: zk

zk-ss.yml

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: zk
  namespace: core-applications
spec:
  serviceName: zk-headless
  replicas: 5
  template:
    metadata:
      labels:
        app: zk
    spec:
      terminationGracePeriodSeconds: 10
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values: 
                    - zk
              topologyKey: "kubernetes.io/hostname"
      containers:
      - name: pk-ubuntu-zookeeper
        imagePullPolicy: Always
        image: quay.io/parkhubprime/pk-ubuntu-zookeeper:0.1.0
        resources:
          requests:
            memory: "2Gi"
            cpu: "500m"
        ports:
        - containerPort: 2181
          name: tcp-client
        - containerPort: 2888
          name: tcp-server
        - containerPort: 3888
          name: tcp-leader-elec
        env:
        - name: ZK_REPLICAS
          value: "5"
        - name: ZK_HEAP_SIZE
          valueFrom:
            configMapKeyRef:
              name: zk-cm
              key: jvm.heap
        - name : ZK_TICK_TIME
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: tick
        - name : ZK_INIT_LIMIT
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: init
        - name : ZK_SYNC_LIMIT
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: tick
        - name : ZK_MAX_CLIENT_CNXNS
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: client.cnxns
        - name: ZK_SNAP_RETAIN_COUNT
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: snap.retain
        - name: ZK_PURGE_INTERVAL
          valueFrom:
            configMapKeyRef:
                name: zk-cm
                key: purge.interval
        - name: ZK_CLIENT_PORT
          value: "2181"
        - name: ZK_SERVER_PORT
          value: "2888"
        - name: ZK_ELECTION_PORT
          value: "3888"
        readinessProbe:
          exec:
            command:
            - "zkOk.sh"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        livenessProbe:
          exec:
            command:
            - "zkOk.sh"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        volumeMounts:
        - name: datadir
          mountPath: /var/lib/zookeeper
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
  - metadata:
      name: datadir
    spec:
      accessModes: 
        - ReadWriteOnce
      storageClassName: "high-throughput-hdd"
      resources:
        requests:
          storage: 500Gi