[keycloak-dev] Mongo Replica Sets

[Carsten Saathoff]

Hi all,

we are currently setting up a production system that uses keycloak as the 
Identity Provider. We use mongodb as the database for keycloak (since this 
is our main database), but require keycloak to also handle mongodb replica 
sets appropriately. Currently, when the primary changes in a mongo replica 
set, keycloak stops working, since it only connects to a single instance.

I have a version of keycloak that uses a mongodb:// uri[1] to specify the 
mongo connection parameters in the keycloak configuration file. Since 
mongodb:// uris are a standard way of obtaining a mongo client, this 
naturally supports replica sets. The patch is only a couple of lines and 
seems to work. The only issue I have is that the MongoDB update seems to 
be broken in master currently. But this is also the case when I build 
keycloak without my patch, so I assume this to be an unrelated issue.

The commit is available in my keycloak fork:

https://github.com/kodemaniak/keycloak/commit/6741dffe38c9c8d9fd8ca1e92cb15762666a607a

Only the setup of the operational attributes is still missing for the 
configuration via uri, but it can easily be added.

I would like to get this somehow into an official release, since I think 
that supporting replica sets is crucial in order to use keycloak with 
mongo in a production setup. Personally I think that specifying mongo 
connection parameters via mongodb:// uris is the most convenient way and 
it's standardized. So it could even be the only way of specifying the 
connection details IMHO.

Since in the contribution section it's encouraged to first discuss such 
ideas on this mailing list prior to sending a pull request, I am sending 
this mail to receive any feedback.

best

Carsten

[1] http://docs.mongodb.org/manual/reference/connection-string/

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 Carsten Saathoff - KISTERS AG - Stau 75 - 26122 Oldenburg - Germany
Handelsregister Aachen, HRB-Nr. 7838 | Vorstand: Klaus Kisters, Hanns Kisters | Aufsichtsratsvorsitzender: Dr. Thomas Klevers
Phone: +49 441 93602 -257 | Fax: +49 441 93602 -222 | E-Mail: Carsten.Saathoff at kisters.de | WWW: http://www.kisters.de
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