node.yml

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  namespace: mysystem
  name: mysystem-db-node
  labels:
    name: database
    system: mysystem
    app: mysystem
spec:
  replicas: 3
  serviceName: "mysystem-db"
  template:
    metadata:
      labels:
        name: database
        system: mysystem
    spec:
      containers:
        - name: db-node
          image: postdock/postgres:latest-postgres11-repmgr40
          livenessProbe:
            exec:
              command: ['bash', '-c', '/usr/local/bin/cluster/healthcheck/is_major_master.sh']
            initialDelaySeconds: 600
            timeoutSeconds: 10
            periodSeconds: 30
            successThreshold: 1
            failureThreshold: 3
          imagePullPolicy: Always
          resources:
            requests:
              memory: "10Mi"
              cpu: "10m"
          env:
            - name: MY_POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            
            - name: "REPMGR_WAIT_POSTGRES_START_TIMEOUT"
              value: "600"
            - name: "REPLICATION_PRIMARY_HOST"
              value: "mysystem-db-node-0.mysystem-db"
            - name: "PARTNER_NODES"
              value: "mysystem-db-node-0.mysystem-db,mysystem-db-node-1.mysystem-db,mysystem-db-node-2.mysystem-db"
            - name: "NODE_NAME"
              value: "$(MY_POD_NAME)"
            - name: "CLUSTER_NODE_NETWORK_NAME"
              value: "$(MY_POD_NAME).mysystem-db"

            - name: "CONFIGS"
              value: "wal_keep_segments:250,shared_buffers:300MB,archive_command:'/bin/true'"

            # Work DB
            - name: "POSTGRES_DB"
              valueFrom:
                configMapKeyRef:
                  name: mysystem-config
                  key: app.db.database
            - name: "POSTGRES_USER"
              valueFrom:
                secretKeyRef:
                  name: mysystem-secret
                  key: app.db.user
            - name: "POSTGRES_PASSWORD"
              valueFrom:
                secretKeyRef:
                  name: mysystem-secret
                  key: app.db.password

            # Cluster configs
            - name: "CLUSTER_NAME"
              valueFrom:
                configMapKeyRef:
                  name: mysystem-config
                  key: app.db.cluster.name
            - name: "REPLICATION_DB"
              valueFrom:
                configMapKeyRef:
                  name: mysystem-config
                  key: app.db.cluster.replication.db
            - name: "REPLICATION_USER"
              valueFrom:
                secretKeyRef:
                  name: mysystem-secret
                  key: app.db.cluster.replication.user
            - name: "REPLICATION_PASSWORD"
              valueFrom:
                secretKeyRef:
                  name: mysystem-secret
                  key: app.db.cluster.replication.password
          ports:
            - containerPort: 5432
          volumeMounts:
            - name: db-data
              mountPath: /var/lib/postgresql/data
  volumeClaimTemplates:
    - metadata:
        name: db-data