apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres:16-alpine
          args: ["-c", "shared_buffers=128MB", "-c", "max_connections=50"]
          ports:
            - containerPort: 5432
          envFrom:
            - secretRef:
                name: realtime-collab-secret
          resources:
            requests:
              memory: "64Mi"
              cpu: "100m"
            limits:
              memory: "256Mi"
              cpu: "500m"
          volumeMounts:
            - name: postgres-data
              mountPath: /var/lib/postgresql/data
            - name: init-sql
              mountPath: /docker-entrypoint-initdb.d
          readinessProbe:
            exec:
              command: ["pg_isready", "-U", "$(POSTGRES_USER)", "-d", "$(POSTGRES_DB)"]
            initialDelaySeconds: 10
            periodSeconds: 10
      volumes:
        - name: postgres-data
          persistentVolumeClaim:
            claimName: postgres-pvc
        - name: init-sql
          configMap:
            name: postgres-init-sql
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
spec:
  selector:
    app: postgres
  ports:
    - port: 5432
      targetPort: 5432