有条件地在docker-compose中安装卷 [英] Mount a volume in docker-compose conditionally

问题描述

我有一个 docker-compose.yml 配置。其中一个容器是Tomcat服务器，它在 webapps 目录中部署了一些默认的 .war 文件。

I have a docker-compose.yml configuration. One of the containers there is a Tomcat server and it has some default .war file deployed in webapps directory.

我希望能够传递（覆盖） war 存档，以便由主机上的某些人部署机。我认为最好的办法就是以某种方式切换/覆盖开始 docker-compose 的能力：默认情况下，我要运行webapp（ war 文件）放置在容器中，但如果需要，我希望有可能从主机上挂载目录（例如在开发/调试过程中）。

I want to have the ability to pass (override) the war archive to be deployed by some which resides on the host machine. I think the best would be to have ability somehow switch / override starting docker-compose: as a default, I want to run the webapp (war file) which is inside the container, but I want to have a possibility to mount a directory from my host (for example during development / debugging) if need be.

当前，我的 docker-compose.yml 中包含以下行，如果需要默认行，则将其注释掉。

Currently, I have the following line in my docker-compose.yml, which is commented out if I need the default.

volumes:
# By default, there is the latest version of the application already present in the container
# If you want to provider the container with your own .war file, uncomment the following line
# - ./application/webapps:/usr/local/tomcat/webapps

有没有更好的方法来实现这一目标？

Is there a better way how to achieve that?

推荐答案

我将使用 https://docs.docker.com/compose/extends/#example-use-case 来运行指定卷的服务扩展。

Instead of (not) mounting a volume commenting out that line, I would use https://docs.docker.com/compose/extends/#example-use-case to run a service extension that specifies a volume.

我这样做是为了解决两个不同的问题：

I do this to tackle two different problems:

• 当Docker映像要在生产环境中运行时我不指定卷，并且 我已在开发过程中指定了一个卷，以检查实时更改。

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