Kubernetes YAML — минимальные манифесты — Связка «приложение + база»

apiVersion: v1
kind: Secret
metadata:
  name: pg-secret
type: Opaque
stringData:
  POSTGRES_PASSWORD: dev-only-change-me
---
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
          ports:
            - containerPort: 5432
          env:
            - name: POSTGRES_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: pg-secret
                  key: POSTGRES_PASSWORD
            - name: POSTGRES_DB
              value: appdb
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
spec:
  selector:
    app: postgres
  ports:
    - port: 5432
      targetPort: 5432
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: api
spec:
  replicas: 2
  selector:
    matchLabels:
      app: api
  template:
    metadata:
      labels:
        app: api
    spec:
      containers:
        - name: api
          image: hashicorp/http-echo:0.2.3
          args: ["-text=ok", "-listen=:8080"]
          ports:
            - containerPort: 8080
          env:
            - name: DB_HOST
              value: postgres
            - name: DB_PORT
              value: "5432"
---
apiVersion: v1
kind: Service
metadata:
  name: api
spec:
  selector:
    app: api
  ports:
    - port: 80
      targetPort: 8080