اجرای یک برنامه‌ی چندسرویسی با Docker Compose

mkdir -p ~/stacks/app && cd ~/stacks/app

POSTGRES_PASSWORD=change-me-strong

# compose.yaml
services:
  db:
    image: postgres:17
    restart: unless-stopped
    environment:
      POSTGRES_USER: app
      POSTGRES_DB: app
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
    volumes:
      - db-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U app"]
      interval: 10s
      retries: 5

  cache:
    image: redis:7-alpine
    restart: unless-stopped

  web:
    image: ghcr.io/example/app:1.4.2
    restart: unless-stopped
    depends_on:
      db:
        condition: service_healthy
    environment:
      DATABASE_URL: postgres://app:${POSTGRES_PASSWORD}@db:5432/app
      REDIS_URL: redis://cache:6379
    ports:
      - "127.0.0.1:8080:8080"

volumes:
  db-data:

docker compose up -d
docker compose ps
docker compose logs -f web

docker compose pull
docker compose up -d
docker image prune -f

docker compose exec -T db pg_dump -U app -Fc app > app-$(date +%F).dump

docker compose down        # volumeها باقی می‌مانند
docker compose down -v     # volumeها هم پاک می‌شوند (داده از بین می‌رود)