如何将 bash 与基于 Alpine 的 docker 图像一起使用？
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How to use bash with an Alpine based docker image?
提问by diugalde
I created a docker image from openjdk:8-jdk-alpine but when I try to execute simple commands I get the following errors:
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，我收到以下错误：
RUN bash
/bin/sh: bash: not found
RUN ./gradlew build
env: can't execute 'bash': No such file or directory
回答by anubhava
Alpine docker image doesn't have bash installed by default. You will need to add following commands to get bash:
默认情况下，Alpine docker 镜像没有安装 bash。您需要添加以下命令来获取bash：
RUN apk update && apk add bash
If youre using Alpine 3.3+then you can just do
如果你正在使用，Alpine 3.3+那么你可以做
RUN apk add --no-cache bash
to keep docker image size small. (Thanks to comment from @sprkysnrky)
保持 docker 图像大小较小。（感谢@sprkysnrky 的评论）
回答by Yuva
Try using RUN /bin/shinstead of bash.
尝试使用RUN /bin/sh代替 bash。
回答by user1738546
RUN /bin/sh -c "apk add --no-cache bash"
worked for me.
对我来说有效。
回答by Sahith Vibudhi
To Install bash you can do:
要安装 bash，您可以执行以下操作：
RUN apk add --update bash && rm -rf /var/cache/apk/*
If you do not want to add extra sizeto your image, you can use ashor shthat ships with alpine.
如果您不想为图像添加额外的尺寸，您可以使用alpine 附带的ash或sh。
Reference: https://github.com/smebberson/docker-alpine/issues/43
