docker-compose-patterns/assets/compose-web-app.yaml

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# Complete multi-service web application
# Stack: Application + PostgreSQL + Redis
# Run: docker compose up -d

services:
  web:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "8080:8080"
    environment:
      DATABASE_URL: postgres://app:${POSTGRES_PASSWORD:-secret}@db:5432/myapp
      REDIS_URL: redis://cache:6379/0
    depends_on:
      db:
        condition: service_healthy
      cache:
        condition: service_healthy
    restart: unless-stopped

  db:
    image: postgres:17
    environment:
      POSTGRES_USER: app
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-secret}
      POSTGRES_DB: myapp
    volumes:
      - db-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U app"]
      interval: 5s
      timeout: 3s
      retries: 3
      start_period: 10s
    restart: unless-stopped

  cache:
    image: redis:7
    volumes:
      - cache-data:/data
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 3s
      retries: 3
      start_period: 5s
    restart: unless-stopped

volumes:
  db-data:
  cache-data: