如何在Docker中正确安装RVM? [英] How to correctly install RVM in Docker?

问题描述

这就是我的Dockerfile中的内容:

RUN gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
RUN curl -L https://get.rvm.io | bash -s stable
RUN /bin/bash -l -c "rvm requirements"
RUN /bin/bash -l -c "rvm install 2.3.3"

工作正常，但是，当我启动容器时，看到的是:

Works just fine, however, when I start the container, I see this:

$ docker -it --rm myimage /bin/bash
/root# ruby --version
ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux]
/root# /bin/bash -l -c "ruby --version"
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]

显然，这不是我想要的.据我了解，问题在于bash在默认情况下不会运行/etc/profile.这就是为什么Ruby不是来自RVM安装的原因.我该如何解决?

Obviously, this is not what I want. As far as I understand, the problem is that bash doesn't run /etc/profile by default. That's why Ruby is not coming from the RVM installation. How can I fix that?

推荐答案

长话短说:

docker -it --rm myimage /bin/bash命令不会将bash作为登录shell启动.

docker -it --rm myimage /bin/bash command does not start bash as a login shell.

说明:

当您运行$ docker -it --rm myimage /bin/bash时，它会调用bash而没有-l选项，这会使bash像被作为登录shell一样被调用，rvm的初始化取决于source -ing /path/to/.rvm/scripts/rvm或/etc/profile.d/rvm.sh，并且该初始化是在.bash_profile或.bashrc或任何其他初始化脚本中进行的.

When you run $ docker -it --rm myimage /bin/bash it's invoke bash without the -l option which make bash act as if it had been invoked as a login shell, rvm initializations depends on the source-ing /path/to/.rvm/scripts/rvm or /etc/profile.d/rvm.sh and that initialization is in .bash_profile or .bashrc or any other initialization scripts.

我该如何解决?

How can I fix that?

如果不这样做，请始终从rvm中添加ruby并添加-l选项.

If you won't, always have the ruby from rvm add -l option.

这是一个由rvm安装ruby的Dockerfile:

Here is a Dockerfile with installed ruby by rvm:

FROM Debian

ARG DEBIAN_FRONTEND=noninteractive
RUN apt-get update -q && \
    apt-get install -qy procps curl ca-certificates gnupg2 build-essential --no-install-recommends && apt-get clean

RUN gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
RUN curl -sSL https://get.rvm.io | bash -s
RUN /bin/bash -l -c ". /etc/profile.d/rvm.sh && rvm install 2.3.3"
# The entry point here is an initialization process, 
# it will be used as arguments for e.g.
# `docker run` command 
ENTRYPOINT ["/bin/bash", "-l", "-c"]

运行容器:

➠ docker_templates : docker run -ti --rm rvm 'ruby -v'
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]
➠ docker_templates : docker run -ti --rm rvm 'rvm -v'
rvm 1.29.1 (master) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io/]
➠ docker_templates : docker run -ti --rm rvm bash
root@efa1bf7cec62:/# rvm -v
rvm 1.29.1 (master) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io/]
root@efa1bf7cec62:/# ruby -v
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]
root@efa1bf7cec62:/# 

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