Bash大括号扩展不适用于Dockerfile RUN命令 [英] Bash brace expansion not working on Dockerfile RUN command

问题描述

我正在Dockerfile中运行以下RUN命令，期望在每个列出的子目录下创建一个日志目录：

I'm running the following RUN command in my Dockerfile, expecting a "logs" directory to be created under each of the listed subdirectories:

RUN mkdir -p /opt/seagull/{diameter-env,h248-env,http-env,msrp-env,octcap-env,radius-env,sip-env,synchro-env,xcap-env}/logs

但是，当我检查图像时，我看到一个目录，其名称为 {diameter-env ，h248-env，http-env，msrp-env，octcap-env，radius-env，sip-env，synchro-env，xcap-env}创建，而不是进行括号扩展。

But when I check the image, I see a directory literally called "{diameter-env,h248-env,http-env,msrp-env,octcap-env,radius-env,sip-env,synchro-env,xcap-env}" created under /opt/seagull, instead of brace expansion taking place.

我在做什么错了？

推荐答案

您没有使用大括号扩展，因为您没有使用Bash。如果您查看有关RUN命令的文档：

You're not using brace expansion, because you're not using Bash. If you look at the documentation for the RUN command:

RUN（shell形式，该命令在shell中运行，默认情况下在Linux上为/ bin / sh -c或在Linux上使用cmd / S / C Windows）

RUN (shell form, the command is run in a shell, which by default is /bin/sh -c on Linux or cmd /S /C on Windows)

而且：

注意：要使用'/ bin / sh'以外的其他shell，请使用exec形式传入所需的shell。例如，RUN [ / bin / bash，-c， echo hello]

Note: To use a different shell, other than ‘/bin/sh’, use the exec form passing in the desired shell. For example, RUN ["/bin/bash", "-c", "echo hello"]

因此，只需更改命令来使用exec表单并显式使用Bash shell：

So, just change the command to use the exec form and explicitly use a Bash shell:

RUN [ "/bin/bash", "-c", "mkdir -p /opt/seagull/{diameter-env,h248-env,http-env,msrp-env,octcap-env,radius-env,sip-env,synchro-env,xcap-env}/logs" ]

这篇关于Bash大括号扩展不适用于Dockerfile RUN命令的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！