Connecting Heroku to RDS using MySql2
问题 All I'm trying to do is deploy my Rails app on Heroku with a db instance on RDS, which seems like it should be straightforward. I'm using the mysql2 adapter in my database.yml and have pushed to heroku and added my db instance per this answer. I've basically followed it to a T, and I don't get a missing gem error. But this is what the heroku logs reveal: /app/vendor/bundle/ruby/1.9.1/bundler/gems/mysql2-e5992664a7bc/lib/mysql2/client.rb:56:in connect': Can't connect to MySQL server on