如何在基于Alpine的Docker映像中使用bash？ [英] How to use bash with an Alpine based docker image?

问题描述

我从openjdk：8-jdk-alpine创建了一个docker镜像，但是当我尝试执行简单的命令时，出现以下错误：

I created a docker image from openjdk:8-jdk-alpine but when I try to execute simple commands I get the following errors:

RUN bash
/bin/sh: bash: not found

RUN ./gradlew build
env: can't execute 'bash': No such file or directory

推荐答案

Alpine docker image没有安装bash默认。您将需要添加以下命令来获取 bash ：

Alpine docker image doesn't have bash installed by default. You will need to add following commands to get bash:

RUN apk update && apk add bash

如果您使用 Alpine 3.3 + 然后您就可以这样做

If youre using Alpine 3.3+ then you can just do

RUN apk add --no-cache bash

使docker映像尺寸较小。 （感谢@sprkysnrky的评论）

to keep docker image size small. (Thanks to comment from @sprkysnrky)

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