I'm Alex's coworker and I'll be working on this too.
We were just discussing your idea, and it seems to fit our requirements.
As far as we have seen, keycloak already has a realm-admin concept. Whenever a realm "R" is created, it creates a R-realm application with a bunch of default roles (manage-users, manage-roles, etc.) into the realm master.
We are currently thinking if we could mimic this structure for applications. What do you think?
> I had an idea a while back that is a simple way to achieve what you're asking for. Th> e idea would be to only allow an admin to grant roles that the admin has access to.
> * A user with admin (super user) role can grant any roles (we would need to add a per-> realm super user role)
> * A user with the role manage-users and some roles on app1 can only grant other users > the roles on app1
> * A user with the role manage-users and some roles on app2 can only grant other users > the roles on app2
> > This is something we should add in either case (to prevent users granting themselves more access). Would it solve your problems?