By the way, I was able to configure external logging by modifying the log4j2.xml file inside the war file for the oxauth and identity modules.
But I could not do it for the idp module. There is no log4j2.xml file inside /opt/gluu/jetty/idp/webapps/idp.war. So how can we forward idp logs?
Same question for the openldap module (solserver). There is nothing in /opt/gluu/jetty for that service.