Dennis Hackethal’s Blog

My blog about philosophy, coding, and anything else that interests me.

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Using Rails Production Credentials with Heroku

Ruby on Rails offers a credentials feature to store secret information in your repository. The keys Rails creates are added to the .gitignore file, but any secret information itself is encrypted and can be checked into git. There’s more info on credentials here.

I found myself confronted with the specific problem of how to use these credentials in Heroku. If you’re using only a master key and store your credentials in config/credentials.ymc.enc, that’s easy: you just set an environment variable in Heroku called RAILS_MASTER_KEY to the contents of your config/master.key file.

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