Note_Tech

All technological notes.

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Docker - Compose

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• Docker - Compose
  • Compose
  • Compose
  • Docker compose file
  • Docker Compose profiles

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Compose

Compose

Command	Description
docker compose ls	List running compose projects
docker compose ps	List containers
docker compose images	List images used by the created containers
docker compose build	Build or rebuild services
docker compose up	Create and start containers
docker compose down	Stop and remove containers, networks
docker compose rm	Removes stopped service containers
docker compose exec	Execute a command in a running container
docker compose logs	View output from containers

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Docker compose file

services:
  # The web application service
  web:
    build: . # Build the image from a Dockerfile in the current directory
    ports:
      - "8000:5000" # Map host port 8000 to container port 5000
    environment:
      - DATABASE_URL=postgres://user:password@db:5432/myapp
    depends_on:
      - db # Ensure 'db' service starts before 'web'

  # The database service
  db:
    image: postgres:15-alpine
    volumes:
      - db_data:/var/lib/postgresql/data
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
      POSTGRES_DB: myapp

volumes:
  db_data: # Named volume to persist database data

Docker Compose profiles

• Docker Compose profiles
  • let you selectively start only certain services in a docker-compose.yml file.

services:
  web:
    image: nginx

  db:
    image: mysql

  adminer:
    image: adminer
    profiles: ["dev"]

# without profile
docker compose up 
# web + db

# with profile
docker compose --profile dev up
# web db adminer