How to move a Heroku addon from one app to another

Question

I am sharing a MongoDB between a few heroku apps and would like to move the ownership/billing to another app.

I have tried attaching (heroku addons:attach) to the receiving app and then using the heroku addons:detach command on the billing app, but this doesn't work.

Answer 1

Heroku support just confirmed that it is not possible to change the billing app for an add-on.

You can attach the add-on to other apps, but if you delete the original billing app then it will instantly delete your database without warning - even if it is attached to other active apps.

Some add-ons like Postgres offer a fork option, so you may be able fork, reconnect to the new instance, and delete the old database. The Postgres fork command looks like:

heroku addons:create heroku-postgresql:standard-0 --fork the-old-app-name::HEROKU_POSTGRESQL_CHARCOAL --app the-new-app-name

Where HEROKU_POSTGRESQL_CHARCOAL is the ENV variable name of your old database on your old app.