apiVersion: v1
kind: Service
metadata:
  name: etcd
  labels:
    app: etcd
    component: infra
spec:
  clusterIP: None
  selector:
    app: etcd
  ports:
  - port: 2379
    targetPort: 2379
    protocol: TCP
    name: client
  - port: 2380
    targetPort: 2380
    protocol: TCP
    name: peer
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: etcd
spec:
  serviceName: etcd
  replicas: 3
  template:
    metadata:
      labels:
        app: etcd
        component: infra
      annotations:
        prometheus.io.scrape: "true"
        prometheus.io.port: "2379"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                    - etcd
              topologyKey: "kubernetes.io/hostname"
      terminationGracePeriodSeconds: 10
      containers:
      - name: etcd
        image: quay.io/coreos/etcd:v3.3.10
        ports:
        - name: client
          containerPort: 2379
        - name: peer
          containerPort: 2380
        livenessProbe:
          httpGet:
            path: /health
            port: client
          initialDelaySeconds: 30
        volumeMounts:
        - name: etcd3
          mountPath: /data
        env:
        - name: ETCDCTL_API
          value: "3"
        - name: ETCD_AUTO_COMPACTION_RETENTION
          value: "4"
        - name: NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        command: ["/usr/local/bin/etcd"]
        args: [
          "-name", "$(NAME)",
          "-data-dir", "/data/etcd3",
          "-initial-advertise-peer-urls", "http://$(IP):2380",
          "-listen-peer-urls", "http://$(IP):2380",
          "-listen-client-urls", "http://$(IP):2379,http://127.0.0.1:2379",
          "-advertise-client-urls", "http://$(IP):2379",
          # bootstrap
          # "-initial-cluster-token", "etcd-prod-events2",
          "-discovery", "https://discovery.etcd.io/xxxxxx",
        ]
  volumeClaimTemplates:
  - metadata:
      name: etcd3
      annotations:
        volume.alpha.kubernetes.io/storage-class: default
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 10Gi