Basically needed a testing/learning environment for Spring because doing Spring on JBoss is too cumbersome for me.
Followed a combination of:
https://blog.openshift.com/free-apache-tomcat-hosting-in-the-cloud-for-java-applications-its-called-openshift/
https://blog.openshift.com/how-to-run-apache-tomcat-8-on-openshift/
Did for Tomcat 7. The latter describes the correct env var to use: OPENSHIFT_DIY_IP
Added a user to tomcat-users.xml per the first link so that I could access the manager app. Uploaded a test war (taken from http://www.michael-thomas.com/tech/apache/tomcat/tutorial_firststeps_tomcat/) and verified the application loads.
