Hi Bill!
> You made a Tomcat adapter?  Want to share?
You can find it here: https://github.com/ungarida/keycloak/
It's a copy and paste from AS7 and it has a lot of dependencies from JBOSS stuff, but if you give me some suggestion I can work on it.

> Running on Undertow alone or Undertow within Wildfly?
The backend is running on an embedded Undertow, I like when the backend is so lightweight I fill like is more scalable and sustainable.