apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: replica
  namespace: cluster1
spec:
  serviceName: replica
  replicas: 1
  selector:
    matchLabels:
      app: replica
  template:
    metadata:
      labels:
        app: replica
    spec:
      containers:
        - name: postgres
          image: postgres:15-alpine
          ports:
            - containerPort: 5432
          env:
            - name: POSTGRES_DB
              value: replica_db
            - name: POSTGRES_USER
              valueFrom:
                secretKeyRef:
                  name: cluster1-postgres-secret
                  key: POSTGRES_USER
            - name: POSTGRES_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: cluster1-postgres-secret
                  key: POSTGRES_PASSWORD
            - name: PGDATA
              value: /var/lib/postgresql/data/pgdata
          command:
            - /bin/sh
            - -c
            - |
              chmod +x /replication-scripts/entrypoint-replica.sh
              exec /replication-scripts/entrypoint-replica.sh
          volumeMounts:
            - name: replica-data
              mountPath: /var/lib/postgresql/data
            - name: replication-scripts
              mountPath: /replication-scripts
      volumes:
        - name: replica-data
          persistentVolumeClaim:
            claimName: replica-data
        - name: replication-scripts
          configMap:
            name: cluster1-replication-scripts
            defaultMode: 0755
---
apiVersion: v1
kind: Service
metadata:
  name: replica
  namespace: cluster1
spec:
  type: ClusterIP
  selector:
    app: replica
  ports:
    - name: postgres
      port: 5432
      targetPort: 5432