The recommended juju charm for postgresql states a nice feature in its readme which is when configured as a standalone server it has the ability to become a master / slave with replication when adding more units. Automatically. The master can even be deleted and a slave recovers its function.
It sounds great but I am wondering, since I have set up a database manually (I have SSHed into the server and createdb and loaded a dump), will it still work or does it have to be with a db that has been created automatically with the charm?