/ Ruby on Rails

Notes on Digital Oceans Ubuntu 14.04 One Click Rails Image

I've been using Digital Ocean for alot of my web applications lately, simply because I find them to be easy to get up and online fast. I don't mind the additional system administrative tasks either, I find it quite fun.

When launching a One-Click Ubuntu 14.04 Image with Nginx and Unicorn for Ruby On Rails keep these things in mind:

  • tail -f /home/unicorn/log/unicorn.log is your friend, use it often to find issues you're having with gem installation. A proper unicorn log shouldn't constantly scroll errors about gems not being found.
  • If you're using Rails 4.1 you probably want to check what version of Ruby RVM is using. rvm list will output the installed versions of Ruby on the system. To use Ruby 2.1.3 use this command use rvm ruby-2.1.3
  • Nginx may render you the dreaded 504 error messages. Check your unicorn logs first and debug any errors that might be there before looking elsewhere. Remember to service unicorn restart often after changes.
  • If you continue to get 504 messages from Nginx look at how much RAM your VPS might be using via the top command. I noticed the new image has 4 unicorn workers by default which was taking up a majority of my RAM when running into gem issues, changing this to 2 helped in the unicorn pid.