I followed Steven's excellent tutorial to setup Geoserver on a Tomcat7 gear on Openshift. This works relatively well. The main issue being that the gear doesn't restart. I build the gear three times now. The first two times the gear did not come alive again. I waited a few good hours before I deleted and rebuilt the application. I deploy the Geoserver 2.7 war as ROOT in my build.
The next problem is of course the CORS setting. Geoserver on Openshift is useless if I cannot access the services from my other applications. I have tested a reverse proxy to access Geoserver. This works but is slow. I would prefer a server side CORS solution. From version 7.0.41 Tomcat supports CORS. I do not know how this can be enabled on OpenShift. I also don't know which is the exact version of Tomcat 7 (JBoss EWS 2.0) which is run by OpenShift.
As always, any help or comments are welcome. Thx, Dennis