apiVersion: v1
kind: ConfigMap
metadata:
  name: zookeeper-config
  namespace: kafka
data:
  ZOO_DATA_LOG_DIR: "/datalog"
  ZOO_DATA_DIR: "/data"
  ZOO_CONF_DIR: "/conf"
  ZOO_SERVERS: "server.1=zookeeper-0.zookeeper:2888:3888;2181 server.2=zookeeper-1.zookeeper:2888:3888;2181 server.3=zookeeper-2.zookeeper:2888:3888;2181"
---
apiVersion: v1
kind: Service
metadata:
  name: zookeeper
  namespace: kafka
  labels:
    app: zookeeper
spec:
  ports:
    - port: 2888
      name: server
    - port: 3888
      name: leader-election
    - port: 2181
      name: client
  clusterIP: None
  selector:
    app: zookeeper
---
apiVersion: v1
kind: Service
metadata:
  name: zookeeper-service
  namespace: kafka
  labels:
    app: zookeeper
spec:
  ports:
    - port: 2181
      name: client
  type: ClusterIP
  selector:
    app: zookeeper
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zookeeper
  namespace: kafka
spec:
  serviceName: zookeeper
  replicas: 3
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: OrderedReady
  selector:
    matchLabels:
      app: zookeeper
  template:
    metadata:
      labels:
        app: zookeeper
    spec:
      initContainers:
        - command:
            - /bin/sh
            - -c
            - |-
              set -ex;
              mkdir -p "$ZOO_DATA_LOG_DIR" "$ZOO_DATA_DIR" "$ZOO_CONF_DIR";
              if [[ ! -f "$ZOO_DATA_DIR/myid" ]]; then
                IDX="$(echo $HOSTNAME| rev | cut -d "-" -f1 | rev)"
                SVR_INDEX=$((IDX+1))
                echo $SVR_INDEX > "$ZOO_DATA_DIR/myid"
              fi
          env:
            - name: HOSTNAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
          envFrom:
            - configMapRef:
                name: zookeeper-config
          image: busybox:1.28
          imagePullPolicy: IfNotPresent
          name: zookeeper-init
          securityContext:
            runAsUser: 0
          volumeMounts:
            - mountPath: /data
              name: data
      containers:
        - image: zookeeper
          imagePullPolicy: Always
          name: zookeeper
          ports:
            - containerPort: 2181
              name: client
            - containerPort: 2888
              name: server
            - containerPort: 3888
              name: leader-election
          resources: {}
          envFrom:
            - configMapRef:
                name: zookeeper-config
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          volumeMounts:
            - mountPath: /data
              name: data
            - mountPath: /datalog
              name: datalog
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes: ["ReadWriteOnce"]
        storageClassName: nfs-client
        resources:
          requests:
            storage: 100Mi
    - metadata:
        name: datalog
      spec:
        accessModes: ["ReadWriteOnce"]
        storageClassName: nfs-client
        resources:
          requests:
            storage: 100Mi