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##
## ZooKeeper deployment
##

## Define a StatefulSet for ZK servers
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: zk
  labels:
    app: heron
    component: zookeeper
spec:
  serviceName: zookeeper
  replicas: 1
  template:
    metadata:
      labels:
        app: heron
        component: zookeeper

    spec:
      containers:
        - name: zookeeper
          image: heron/heron:latest
          command: ["sh", "-c"]
          args:
            - >
              /opt/zookeeper/scripts/start-zookeeper.sh
          ports:
            - containerPort: 2181
              name: client
            - containerPort: 2888
              name: server
            - containerPort: 3888
              name: leader-election
          env:
            - name: ZOOKEEPER_SERVERS
              value: zk-0
          readinessProbe:
              exec:
                command:
                  - "/opt/zookeeper/scripts/zookeeper-ruok.sh"
              initialDelaySeconds: 5
              timeoutSeconds: 5

          livenessProbe:
              exec:
                command:
                  - "/opt/zookeeper/scripts/zookeeper-ruok.sh"
              initialDelaySeconds: 15
              timeoutSeconds: 5

          volumeMounts:
            - name: datadir
              mountPath: /heron/data
      volumes:
        - name: datadir
          emptyDir: {}

---

##
## Define the ZooKeeper headless service
##
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
  name: zookeeper
  labels:
    app: heron
    component: zookeeper
spec:
  ports:
    - port: 2888
      name: server
    - port: 3888
      name: leader-election
    - port: 2181
      name: client
  clusterIP: None
  selector:
    app: heron
    component: zookeeper