Deploying Rails applications using Mina and Bamboo

Posted in: Development

We use Mina to deploy our Ruby on Rails projects. With our deployment scripts written and packaged into a gem we wanted to make use of our continuous integration server to build and deploy automatically to the production and staging environments.

Our continuous integration server is Bamboo which needed a little configuring to play nicely with Ruby. The packages containing the Ruby binaries were installed on the server and recognised by Bamboo (via auto-detection on the Server Capabilities admin screen) then we added the free Bamboo Ruby Plugin to give us Bundler tasks. This kept the deployment plans easy to understand by avoiding as much as possible the need for manual scripting.

The important tasks for us were "Bundler Install" (obvious what that does) and "Bundler CLI" which let us run our mina deployment commands using the bundler environment with "bundle exec". A bit of messing around with SSH keys and it all works beautifully.

The final setup is:

  • A Bamboo build plan pulls the code from github and makes it available as an artifact (tests are run here)
  • A Bamboo deployment plan takes the artifact, runs "bundle install" to get the code required for deployment then runs the mina tasks to push it to the server

Bamboo allows us to trigger each of these steps automatically so we can deploy a new version of our application just by merging code into the appropriate branch in our repositories. We deploy to both our staging and production environments in this way which makes for a simple workflow, all in Github. The results of the build are sent to us via email and appear in our Slack channel. Bamboo has also let us schedule a rebuild and redeploy of our staging environment on a monthly basis so we will be alerted if a piece of infrastructure has changed and caused our tests to start failing.

Posted in: Development