Question

运行我的docker容器时，它知道rbenv global。但是，当它尝试通过ruby或which ruby或whereis ruby找到红宝石时，我什么也得不到。它也不会识别rails-api或gem。发生了什么事？

Dockerfile

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

Answer 1

这里的问题是RUN中的每个Dockerfile语句都发生在自己的环境中。 RUN source ~/.bash_profile会将$PATH设置为/root/.rbenv/shims。但后续RUN将不会设置此环境，因为它们不会来源.bash_profile，因为它不是交互式shell。

解决此问题的简单方法是在ENV PATH $HOME/.rbenv/bin:$HOME/.rbenv/shims:$PATH和ruby命令之前的某处添加gem。这是rbenv init shell脚本中唯一需要的。

Answer 2

安装新的Ruby版本后，您是否尝试过rbenv rehash？

Answer 3

您的Dockerfile仅使用一种版本的Ruby。给定您的用例，我建议您仅使用官方的ruby docker映像：https://hub.docker.com/_/ruby

Docker容器知道rbenv全局但不知道ruby

Dockerfile

3 个答案: