apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: "etcd"
  namespace: discov
  labels:
    app: "etcd"
spec:
  serviceName: "etcd"
  replicas: 5
  template:
    metadata:
      name: "etcd"
      labels:
        app: "etcd"
    spec:
      volumes:
      - name: etcd-pvc
        persistentVolumeClaim:
          claimName: etcd-pvc
      containers:
      - name: "etcd"
        image: quay.io/coreos/etcd:latest
        ports:
        - containerPort: 2379
          name: client
        - containerPort: 2380
          name: peer
        env:
        - name: CLUSTER_SIZE
          value: "5"
        - name: SET_NAME
          value: "etcd"
        - name: VOLNAME
          valueFrom:
            fieldRef:
              apiVersion: v1
              fieldPath: metadata.name
        volumeMounts:
        - name: etcd-pvc
          mountPath: /var/lib/etcd
          subPathExpr: $(VOLNAME)  # data mounted respectively in each pod
        command:
          - "/bin/sh"
          - "-ecx"
          - |

            chmod 700 /var/lib/etcd

            IP=$(hostname -i)
            PEERS=""
            for i in $(seq 0 $((${CLUSTER_SIZE} - 1))); do
                PEERS="${PEERS}${PEERS:+,}${SET_NAME}-${i}=http://${SET_NAME}-${i}.${SET_NAME}:2380"
            done
            exec etcd --name ${HOSTNAME} \
              --listen-peer-urls http://0.0.0.0:2380 \
              --listen-client-urls http://0.0.0.0:2379 \
              --advertise-client-urls http://${HOSTNAME}.${SET_NAME}.discov:2379 \
              --initial-advertise-peer-urls http://${HOSTNAME}.${SET_NAME}:2380 \
              --initial-cluster ${PEERS} \
              --initial-cluster-state new \
              --logger zap \
              --data-dir /var/lib/etcd \
              --auto-compaction-retention 1