apiVersion: v1
kind: Service
metadata:
  name: etcd-dns
  namespace: dns
spec:
  ports:
  - name: etcd-client
    port: 2379
    protocol: TCP
  - name: etcd-peer
    port: 2380
    protocol: TCP
  selector:
    app: etcd-dns
  publishNotReadyAddresses: true
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: etcd-dns
  namespace: dns
  labels:
    app: etcd-dns
spec:
  serviceName: "etcd-dns"
  replicas: 1
  selector:
    matchLabels:
      app: etcd-dns
  template:
    metadata:
      labels:
        app: etcd-dns
    spec:
      containers:
      - name: etcd-dns
        image: quay.io/coreos/etcd:latest
        ports:
        - containerPort: 2379
          name: client
        - containerPort: 2380
          name: peer
        env:
        - name: CLUSTER_SIZE
          value: "1"
        - name: SET_NAME
          value: "etcd-dns"
        volumeMounts:
        - name: datadir
          mountPath: /var/run/etcd
        command:
          - /bin/sh
          - -c
          - |
            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 /usr/local/bin/etcd --name ${HOSTNAME} \
              --listen-peer-urls http://${IP}:2380 \
              --listen-client-urls http://${IP}:2379,http://127.0.0.1:2379 \
              --advertise-client-urls http://${HOSTNAME}.${SET_NAME}:2379 \
              --initial-advertise-peer-urls http://${HOSTNAME}.${SET_NAME}:2380 \
              --initial-cluster-token etcd-cluster-1 \
              --initial-cluster ${PEERS} \
              --initial-cluster-state new \
              --data-dir /var/run/etcd/default.etcd
        ports:
        - containerPort: 2379
          name: client
          protocol: TCP
        - containerPort: 2380
          name: peer
          protocol: TCP
  volumeClaimTemplates:
  - metadata:
      name: datadir
    spec:
      accessModes:
        - "ReadWriteOnce"
      storageClassName: "local-storage"
      resources:
        requests:
          storage: 1Gi