If you are asking: have we done this? I am not sure, I will let other people comment. but I see openshift provides postgresql and java support plus some catridges that are in the pega platform support guide (e.g., eap jboss eap 6.4), as long as openshift provides platforms described here: https://pdn.pega.com/documents/platform-support-guide. You should be able to install pega without any issues.