Rails 5.2 with master.key - Heroku deployment

Question

Rails 5.2 introduces the encrypted secrets feature through the usage of the awesome credentials.yml. But I\'m struggling to get it to work with Heroku.

Is t

Answer 1

You could also use the following command to create Heroku RAILS_MASTER_KEY with the contents of config/master.key:

heroku config:set RAILS_MASTER_KEY="$(< config/master.key)"

Note: make sure you are in the directory that contains your Rails app.

Answer 2

You should set the environment variable RAILS_MASTER_KEY, either on your heroku web dashboard, or using console:

$ heroku config:set RAILS_MASTER_KEY=<your-master-key>

Example:

$ heroku config:set RAILS_MASTER_KEY=123456789

(The < and > are placeholders)

Rails will detect this variable and use it as your master key (instead of looking for it in master.key file).