docker-compose:通过使用相同的 container_name 在多个项目之间共享容器 [英] docker-compose: Sharing container between multiple projects by using the same container_name

问题描述

我想为在同一台服务器上运行的多个项目使用 MySQL docker 容器.

I want to use a MySQL docker container for multiple projects running on the same server.

使用 docker-compose v3 文件，我只是在每个项目中具有相同的 mysql 容器配置，并且它们具有相同的 container_name:

Using docker-compose v3 files, I simply have the same mysql container configuration in each of the projects, and they have the same container_name:

version: "3"

services:
  app1:
    image: foo
    links:
      - mysql

  mysql:
    image: mysql/mysql:5.7
    container_name: shared_mysql

第二个应用程序有一个类似的 docker-compose.yml 文件，但使用 app2 而不是 app1.

The second application has a similar docker-compose.yml file, but with app2 instead of app1.

当为 app2 运行 docker-compose up --no-recreate 时，出现错误:

When running docker-compose up --no-recreate for app2, I get an error:

Creating shared_mysql ... error
ERROR: for shared_mysql
Cannot create container for service mysql: Conflict.
The container name "/shared_mysql" is already in use by container "deadbeef".
You have to remove (or rename) that container to be able to reuse that name.

如何在多个 docker 项目之间共享 MySQL 容器?

What can I do to share the MySQL container between multiple docker projects?

推荐答案

您可以简单地避免在两个 docker-compose.yml 文件之一中重新定义 mysql，并将 mysql 和其他容器连接到同一网络.

You can simply avoid redefining the mysql in one of the two docker-compose.yml files and connect mysql and the other containers to the same network.

为此，创建一个网络:

docker network create shared

将您的网络分配给您的 mysql 容器:

Assign your network to your mysql container:

version: '3'
services:
  mysql:
    ...
    networks:
    - shared
networks:
  shared: 
    external:
      name: shared

对于任何其他需要访问mysql的容器，只需添加与上述相同的网络定义:

For any other container that has need to access mysql, just add the same network definition as above:

version: '3'
services:
  app1:
    ...
    networks:
    - shared
  app2:
    ...
    networks:
    - shared
  ...
networks:
  shared: 
    external:
      name: shared

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