Docker容器了解rbenv全局但不了解ruby [英] Docker container knows rbenv global but not ruby

问题描述

运行docker容器时，它知道rbenv全局。但是无论何时，只要它尝试通过 ruby​​ 或哪个红宝石或哪里是红宝石找到红宝石我什么也没得到。它还无法识别 rails-api 或 gem 。发生了什么事？

When running my docker container it knows rbenv global. But when ever it try to find ruby via ruby or which ruby or whereis ruby I get nothing. It also doesn't recognize rails-api or gem. What is going on?

FROM centos:6.6

RUN yum update -y
RUN yum install git openssl-devel openssh-server sudo openssl readline-devel readline zlib-devel zlib libxml2-devel libxml2 libxslt-devel libxslt nginx tar gcc libaio libaio-devel -y
RUN rpm -Uvh https://opscode-omnibus-packages.s3.amazonaws.com/el/6/x86_64/chef-12.5.1-1.el6.x86_64.rpm
RUN sed -i -e "s/Defaults    requiretty.*/ #Defaults    requiretty/g" /etc/sudoers

RUN mkdir -p /var/run/sshd

RUN useradd -m -u 1000 -G wheel deploy && echo '%wheel  ALL=(ALL)  NOPASSWD: ALL' >> /etc/sudoers.d/wheel
USER deploy
RUN mkdir ~/dev

RUN git clone https://github.com/sstephenson/rbenv.git ~/.rbenv/
RUN git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build

ENV PATH ~/.rbenv/bin:$PATH
RUN echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
RUN source ~/.bash_profile
ENV CONFIGURE_OPTS --disable-install-doc

RUN rbenv install 2.2.3
RUN rbenv global 2.2.3
RUN bash -l -c 'gem update --system'
RUN bash -l -c 'gem update'
RUN bash -l -c 'gem install nokogiri -- --use-system-libraries'
RUN bash -l -c 'gem install bundler rails-api --no-rdoc --no-ri'

COPY oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm /tmp/oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm
COPY oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm /tmp/oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm
COPY oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm /tmp/oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm

RUN sudo rpm -Uvh /tmp/oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm
RUN sudo rpm -Uvh /tmp/oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm
RUN sudo rpm -Uvh /tmp/oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm

RUN sudo touch /etc/sysconfig/network

RUN NLS_LANG=American_America.UTF8
ENV ORACLE_HOME=/usr/lib/oracle/12.1/client64
ENV LD_LIBRARY_PATH=/usr/lib/oracle/12.1/client64/lib

EXPOSE 22
EXPOSE 3000
EXPOSE 5000

推荐答案

此处的问题是每个 RUN Dockerfile 中的code>语句发生在其自身的环境中。 RUN源〜/ .bash_profile 会将 $ PATH 设置为具有 /root/.rbenv / shims 。但是随后的 RUN 不会设置此环境，因为他们不会获取 .bash_profile ，因为这不是交互式的

The issue at hand here is that every RUN statement in the Dockerfile happens in its own environment. The RUN source ~/.bash_profile will set $PATH to have /root/.rbenv/shims in it. But subsequent RUN will not have this environment set as they won't source .bash_profile since this isn't an interactive shell.

解决此问题的简单方法是仅添加 ENV路径$ HOME / .rbenv / bin：$ HOME / .rbenv / shims：$ PATH 在 ruby​​ 和 gem 命令之前。实际上，这是 rbenv 初始Shell脚本中所需的唯一内容。

The easy way to solve this is to just add a ENV PATH $HOME/.rbenv/bin:$HOME/.rbenv/shims:$PATH somewhere before the ruby and gem commands. This is really the only bit you should need from the rbenv init shell script.

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