Heroku has a great feature called heroku ps:exec which allows you to connect to running nodes. You can use this command to connect your elixir nodes easily. And debug your nodes like in your network.

https://github.com/Elixir-Recipes/Elixir-Recipes.github.io/blob/source/source/_posts/2017-10-21-how-to-connect-and-debug-elixir-or-phoenix-app-at-heroku.md