How to manage related applications
Modern mysql_client interface:
Relations to new applications are supported via the “mysql_client” interface. To create a relation:
juju integrate mysql-router application
To remove a relation:
juju remove-relation mysql-router application
All listed on CharmHub applications are available here, e.g. mysql-test-app.
Legacy mysql-shared interface:
This charm also supports the legacy relation via the mysql interface. Please note that these interface is deprecated.
juju relate mysql-router:shared-db myapplication
Internal operator user
To rotate the internal router passwords, the relation with backend-database should be removed and related again. That process will generate a new user and password for the application, while retaining the requested database and data.
juju remove-relation mysql-router mysql
juju integrate mysql-router mysql