docs/rails

Tags and Dockerfile links

• 4.1.5, 4.1, 4, latest (Dockerfile)
• onbuild (onbuild/Dockerfile)

What is Ruby on Rails?

Ruby on Rails, often simply referred to as Rails, is an open source web application framework which runs via the Ruby programming language. It is a full-stack framework: it allows creating pages and applications that gather information from the web server, talk to or query the database, and render templates out of the box. As a result, Rails features a routing system that is independent of the web server.

wikipedia.org/wiki/Ruby_on_Rails

How to use this image

Create a Dockerfile in your rails app project

FROM rails:onbuild

Put this file in the root of your app, next to the Gemfile.

This image includes multiple ONBUILD triggers so that should be all that you need for most applications. The build will COPY . /usr/src/app, RUN bundle install, EXPOSE 3000, and set the default command to rails server.

Then build and run the docker image.

docker build -t my-rails-app .
docker run --name some-rails-app -d my-rails-app

Test it by visiting http://container-ip:3000 in a browser. On the other hand, if you need access outside the host on port 8080:

docker run --name some-rails-app -p 8080:3000 -d my-rails-app

Then hit http://localhost:8080 or http://host-ip:8080 in a browser.

User Feedback

Issues

If you have any problems with, or questions about this image, please contact us through a GitHub issue or via the IRC channel #docker-library on Freenode.

Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.