profiles 声明¶

docker-compose 中包含许多服务，我们可以通过使用 profiles 属性来控制是否启动某项服务。profiles 属性的值是数组形式的，例如我将为 redis 属性增加一个名为 alming 的 profile:

version: "3.9"
services:
  web:
    build: .
    ports:
      - "5000:5000"
    volumes:
    #将宿主机当前目录与容器内/code目录绑定，功能与docker run的-vc参数一致
      - .:/code
    environment:
    # 设置容器内环境变量，功能与Dockerfile ENV指令以及docker run的-e参数一致
      FLASK_ENV: development
  redis:
    image: "redis:alpine"
    profiles: alming

启动它，会发现 redis 服务并未启动:

$ docker-compose up
Starting compose_web_1 ... done
Attaching to compose_web_1
web_1    |  * Serving Flask app 'app.py' (lazy loading)
web_1    |  * Environment: development
web_1    |  * Debug mode: on
web_1    |  * Running on all addresses.
web_1    |    WARNING: This is a development server. Do not use it in a production deployment.
web_1    |  * Running on http://172.18.0.2:5000/ (Press CTRL+C to quit)
web_1    |  * Restarting with stat
web_1    |  * Debugger is active!
web_1    |  * Debugger PIN: 132-905-791

激活 profiles¶

第一种就是使用 –profile 参数，启动命令如下:

$ docker-compose --profile alming -f docker-compose-profiles.yml up

第二种方式是配置 COMPOSE_PROFILES 环境变量，例如执行以下命令添加环境便令:

$ export COMPOSE_PROFILES=alming
$ docker-compose up