如何将容器目录挂载到另一个Docker容器? [英] How to mount container directory to another docker container?

问题描述

我有以下配置:

• 主机:ubuntu，正在运行docker服务器，并且在/home/apps/中具有应用程序目录.
• Container-A:docker:latest， -v/home/apps:/apps -v/var/run/docker.sock:/var/run/docker.sock ，现在有了/apps 中的应用.
• 容器B:python:2.7， -v/apps/foo:/foo ，/foo 中的一个特定应用.

Container-A使用 docker run 运行Container-B，我需要将/apps/foo 挂载到Container-B的/foo .但是不会，/foo 为空.

我相信这是因为docker服务器正在其他地方(在Container-A之外)运行.

将/apps/foo 挂载到Container-B的方式是什么?

Container-A正在使用标志 -v/apps -v/var/run/docker.sock:/var/run/docker.sock 运行.未从主机上安装/apps .在这种情况下，如何将/apps/foo 挂载到Container-B?

解决方案

那是正确的.由于您使用的是/var/run/docker.sock，即使您从Container-A运行 -v/apps/foo:/foo ，主机仍然是您的docker服务器运行的主机.

因此，您可以像这样创建一个卷: -v/home/apps/foo:/foo (从Container-A内)或在Container-A内设置辅助docker服务器./p>

I have following configuration:

• Host: ubuntu, has docker server running, has directories of apps in /home/apps/.
• Container-A: docker:latest, -v /home/apps:/apps -v /var/run/docker.sock:/var/run/docker.sock, now it has apps in /apps.
• Container-B: python:2.7, -v /apps/foo:/foo, one specific app in /foo.

Container-A runs Container-B using docker run and I need /apps/foo to be mounted to Container-B's /foo. But it won't, /foo is empty.

I believe it's because docker server is running somewhere else (outside of Container-A).

What are the ways of mounting /apps/foo to Container-B?

EDIT:

Container-A is running with flags -v /apps -v /var/run/docker.sock:/var/run/docker.sock. /apps is not mounted from the host. How to mount /apps/foo to Container-B in this case?

解决方案

That is correct. Since you are using /var/run/docker.sock, even when you run -v /apps/foo:/foo from Container-A, the host machine is still the one your docker server runs on.

So you can either create a volume like that: -v /home/apps/foo:/foo (from inside Container-A) or setup a secondary docker server inside Container-A.

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