Hi Ewan, thanks a lot for the hints, you saved my day. You were absolutely right. Indeed, the init script has two bugs that lead to a wrong DB_PORT environment variable. I provided a workaround and a description of the two bugs here. https://github.com/jboss-dockerfiles/keycloak/pull/155 <https://github.com/jboss-dockerfiles/keycloak/pull/155> Unfortunately, my bash magic is not good enough to provide a clean solution for the init script. Best regards, Christoph