Comment 2 for bug 1436093

This bug also affects me.

Users may expects that "juju config percona-cluster root-password=$NEW_PASSWORD" command will change root password on mysql side as well.
However, it doesn't change it actually.
It would cause confusion and hooking errors for users.

Also, juju charm documentation[1] doesn't mention it clearly.
The documentation should mention about this limitation more clearly like this on configuration section.

Keep in mind that you have to change manually those passwords on mysql side as well if you update this password.

[1] https://jujucharms.com/percona-cluster/252