[Docker] Docker Compose

compose는 multi-container Docker applications을 정의하고 실행하는 도구이다. docker compose에서는 YAML 파일을 통해 애플리케이션 서비스를 설정할 수 있다.

 

compose 사용법은 기본적으로 3가지 단계를 거친다.

 

1. app의 환경을 Dockerfile로 정의하여 어느 곳에서는 재사용할 수 있도록 한다.
2. app의 서비스들을 docker-compose.yml 파일에 정의하여 독립된 환경에서 함께 동작할 수 있도록 한다.
3. 'docker compose up' 명령어를 통해 전체 app을 실행시킨다. docker-compose binary를 사용하여 'docker-compose up' 명령어를 사용해도 된다.

- docker-compose.yml

version: "3.9"
services:
  # web과 redis 두가지 service 정의
  # service - web
  web:
    # build from the Dockerfile in current directory
    build: .
    # binds the containser and the host machine to the exposed port, 5000
    ports:
      - "5000:5000"
    # mount the project directory (./) on the host to /code inside the container
    volumes:
      - .:/code
    # set the FLASK_ENV environment variable to development
    environment:
      FLASK_ENV: development
  # service - redis 
  redis:
    # use a public Redis image pulled from the Docker Hub registry
    image: "redis:alpine"

 

 

[reference]

- https://docs.docker.com/compose/gettingstarted/

Get started with Docker Compose

- https://github.com/rmk1075/Docker_Env

GitHub - rmk1075/Docker_Env: study about docker for setting up dev environment