使用IntelliJ/RubyMine在docker中调试rails应用程序

Question

这里是Dockerfile

FROM ruby:2.2.0
# Install package
RUN apt-get update -qq && apt-get install -y \
    build-essential \
    libpq-dev \
    nodejs \
    openssh-server

# Setting sshd
RUN mkdir /var/run/sshd
RUN echo 'root:root' | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config
RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile
EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]

RUN mkdir /myapp
WORKDIR /myapp
ADD Gemfile /myapp/Gemfile
ADD Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
ADD . /myapp

和docker-compose.yml

version: '2'
services:
  db:
    image: postgres
  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
      - "22"
    depends_on:
      - db

（对于ssh->在flow this链接https://docs.docker.com/engine/examples/running_ssh_service/)

3000/TCP->0.0.0.0:3000

将ssh连接到容器

ssh root@localhost-p 32768

RUN mkdir /myapp
WORKDIR /myapp
ADD Gemfile /myapp/Gemfile
ADD Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
ADD . /myapp

 volumes:
      - .:/myapp

通过删除docker-compose.yml中的这一行，我可以很好地将SSH连接到容器

command: bundle exec rails s -p 3000 -b '0.0.0.0'

所以我认为问题是关于Rails的。但我不知道怎么修。

Answer 1

我已经设法使用RubyMine远程调试docker中运行的rails，而不使用SSH。

• RubyMine 2017.2.4（建筑#RM-172.4155.44，2017年9月26日建筑）
• docker内部ruby（ruby 2.4.2p198(2017-09-14修订版59899)[x86_64-linux])
• RubyMine使用的Ruby SDK和宝石(Ruby-2.4.2-P198)

注意：对于Ruby SDK，我只是使用本地的Ruby解释器/usr/bin/Ruby，而不是远程的。

docker run --name rails-demo -p 1234:1234 -p 3080:3000 -it ruby bash

# gem 'pry-byebug'
gem 'debase', '0.2.2.beta10'
gem 'ruby-debug-ide'

bundle install

/home/hello_rails# rdebug-ide --host 0.0.0.0 --port 1234 --dispatcher-port 26162 -- bin/rails s

现在启动RubyMine，运行->Debug...->编辑配置...

单击加号'+'添加新配置，并选择Ruby remote Debug。

如上图所示填写表单，然后单击Debug按钮。现在您将在docker中看到Rails服务器开始运行：

/home/hello_rails# rdebug-ide --host 0.0.0.0 --port 1234 --dispatcher-port 26162 -- bin/rails s
Fast Debugger (ruby-debug-ide 0.6.0, debase 0.2.2.beta10, file filtering is supported) listens on 0.0.0.0:1234
=> Booting Puma
=> Rails 5.1.4 application starting in development 
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.10.0 (ruby 2.4.2-p198), codename: Russell's Teapot
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop