apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: myapp
  labels:
    app: myapp
  name: myapp
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myapp
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: myapp
    spec:
      hostname: app-pod
      restartPolicy: Always
      containers:
        - name: app-fpm
          image: vasyakrg/php-app
          imagePullPolicy: Always
          ports:
          - containerPort: 80
---

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: myapp
  labels:
    app: myapp-psql
  name: myapp-psql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myapp-psql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: myapp-psql
    spec:
      hostname: myapp-psql-pod
      restartPolicy: Always
      containers:
        - name: myapp-db
          image: postgres:12-alpine
          imagePullPolicy: IfNotPresent
          env:
          - name: POSTGRES_USER
            valueFrom:
              secretKeyRef:
                name: myapp-psql-secret
                key: postgress-user
          - name: POSTGRES_PASSWORD
            valueFrom:
              secretKeyRef:
                name: myapp-psql-secret
                key: postgress-password
          - name: POSTGRES_DB
            valueFrom:
              secretKeyRef:
                name: myapp-psql-secret
                key: postgress-dbname
          volumeMounts:
            - name: vol-myapp-postgres
              mountPath: /var/lib/postgresql/data
              subPath: data
            - name: pgsql-tmpfs
              mountPath: /run
            - name: pgsql-tmpfs
              mountPath: /tmp

      volumes:
        - name: vol-myapp-postgres
          persistentVolumeClaim:
            claimName: myapp-db-pvc
        - name: pgsql-tmpfs
          emptyDir:
            medium: Memory