Keycloak with 10 million realms

[Sagun Tumkar]

Hi There,

We are on latest keycloak version with Quarkus distribution. We have a usecase where we will need to create about 10 million realms. Each realm would have limited set of client/groups/users/roles/idps. Most of the realms would have mostly 10/12 clients, 3/5 groups and roles, 20/25 clients.

I am aware that keycloak performance starts degrading when we hit 500 realms mark. But what I understood is that happens only with the admin UI and login flows would still be fine.

I wanted to check if this is the right approach or is there any other way we could achieve this? I don't want to create single realm and add 10 million groups where each group would act as a realm. This approach has security/maintenance issues.

Did anyone setup keycloak for this kind of dataset? I would really appreciate if you could share your findings with the performance and any suggestion on how to do it in better way.

Thanks,
Sagun

[Sagun Tumkar]

Sorry for the typo. I meant 10/12 users (not clients).