How to debug Rails app in production

I think there are three places you should try looking/trying that aren’t the nginx logs:

  1. Can you upload a file from the filesystem (such as your app repo’s README) using the console in production?
  2. Can you temporarily download your production credentials to development and debug locally?
  3. (for use in conjunction with the above two): I would look in the development.log and production.log files rather than the nginx logs for exception reports.