docker - 跨容器重用配置

Question

将配置传递并重新用于Docker容器的行业惯例是什么，有些配置是常见的，而有些则具有自定义值。例如。

注意，产品容器具有自定义配置参数。 My_CUSTOM_CONFIG

customer:
  image: node
  build:
    context: ./Customer
    dockerfile: Dockerfile
  environment:
    DATABASE_HOST: database
    DATABASE_NAME: MyDB
    DATABASE_USER: myusername
    DATABASE_PASSWORD: mypassword
    SERVICE_PORT: 80
  depends_on:
    - database

product:
  image: node
  container_name: product
  restart: on-failure
  build:
    context: ./Product
    dockerfile: Dockerfile
  environment:
    DATABASE_HOST: database
    DATABASE_NAME: MyDB
    DATABASE_USER: myusername
    DATABASE_PASSWORD: mypassword
    SERVICE_PORT: 80
    My_CUSTOM_CONFIG: secret
  depends_on:
    - consul
    - database

Answer 1

看看 env_file :

Add environment variables from a file. Can be a single value or a list.

将其放入 .env中:

DATABASE_HOST=database
DATABASE_NAME=MyDB
DATABASE_USER=myusername
DATABASE_PASSWORD=mypassword
SERVICE_PORT=80

然后在 docker-compose.yml中使用它

customer:
  image: node
  build:
    context: ./Customer
    dockerfile: Dockerfile
  env_file: .env
  depends_on:
    - database

product:
  image: node
  container_name: product
  restart: on-failure
  build:
    context: ./Product
    dockerfile: Dockerfile
  env_file: .env
  environment:
    My_CUSTOM_CONFIG: secret
  depends_on:
    - consul
    - database