apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgresql
spec:
  selector:
    matchLabels:
      app: postgresql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: postgresql
    spec:
      containers:
        - image: postgres:13
          name: postgresql
          env:
            - name: POSTGRES_USER
              valueFrom:
                secretKeyRef:
                  name: postgres-secret
                  key: postgres-user
            - name: POSTGRES_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: postgres-secret
                  key: postgres-password
            - name: POSTGRES_DB
              valueFrom:
                configMapKeyRef:
                  name: postgres-config
                  key: postgres-db
          ports:
            - containerPort: 5432
              name: postgresql
          volumeMounts:
            - name: postgres-config-volume
              mountPath: /etc/postgresql/postgresql.conf
              subPath: postgresql.conf
              readOnly: true
            - name: postgre-data-volume
              mountPath: /var/lib/postgresql/data
      volumes:
        - name: postgres-config-volume
          configMap:
            name: postgres-config
        - name: postgre-data-volume
          persistentVolumeClaim:
            claimName: postgres-claim