Docker 无法在 Rails 捆绑包上构建安装 rake

Question

我使用Docker for Windows 为 Rails(v5) 应用程序运行图像。

当我执行docker-compose build 时，我收到此错误。我不知道去哪里调试和/或解决这个问题。

这是我的Dockerfile：

FROM ruby:2.3.3-slim

RUN apt-get update && apt-get install -y build-essential
RUN apt-get install -y libmysqlclient-dev
RUN apt-get install -y mysql-client
RUN apt-get install -y libmagickwand-dev imagemagick
RUN apt-get install -y curl
RUN curl -sL https://deb.nodesource.com/setup_6.x | bash -
RUN apt-get install -y nodejs
RUN apt-get install -y git
#RUN npm install -g phantomjs

RUN gem update --system

RUN mkdir -p /MyImage
WORKDIR /MyImage
COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock
RUN gem install bundler
RUN bundle install

COPY package.json package.json
RUN npm update
RUN npm install

COPY . /MyImage

CMD [ "foreman", "start" ]

如果我的错误，这是一个日志：

Step 15/20 : RUN bundle install
 ---> Running in 4bf360b89cb7
The git source `git://github.com/acrogenesis/owlcarousel-rails.git` uses the `git` protocol, which transmits data without encryption. Disable this warning with `bundle config git.allow_insecure true`, or switch to the `https` protocol to keep your data secure.
The git source `git://github.com/sinatra/sinatra.git` uses the `git` protocol, which transmits data without encryption. Disable this warning with `bundle config git.allow_insecure true`, or switch to the `https` protocol to keep your data secure.
Fetching source index from https://rubygems.org/
Fetching source index from https://rails-assets.org/
Fetching git://github.com/sinatra/sinatra.git
Fetching git://github.com/acrogenesis/owlcarousel-rails.git
Fetching gem metadata from https://rails-assets.org/..
Fetching rake 12.1.0
Installing rake 12.1.0
Errno::ENOENT: No such file or directory @ rb_sysopen -
/usr/local/lib/ruby/site_ruby/2.3.0/bundler/templates/Executable
An error occurred while installing rake (12.1.0), and Bundler cannot continue.
Make sure that `gem install rake -v '12.1.0'` succeeds before bundling.

In Gemfile:
  autonumeric-rails was resolved to 2.0.0.1, which depends on
    jquery-rails was resolved to 4.3.1, which depends on
      railties was resolved to 5.0.6, which depends on
        rake
ERROR: Service 'MyImage' failed to build: The command '/bin/sh -c bundle install' returned a non-zero code: 5

但是当我直接在容器的外壳中执行gem install rake -v '12.1.0' 时，一切都安装得很好。

Answer 1

请尝试按照错误消息中的说明自行安装 rake：

gem install rake -v '12.1.0'

调试：

1. 注释掉Dockerfile 中从RUN bundle install 开始到结束的所有行；

2. 然后运行docker build -t test:0.0 .;

3. 开始互动会话：docker run -it test:0.0 /bin/bash;

4. 尝试手动执行gem install rake -v '12.1.0'...