The AdminUI currently doesn't work on OpenShift, i.e., it's not possible to log in or create a new push application, etc. When trying to log in, the following error occurs:

Failed to load resource: the server responded with a status of 404 (Not Found)
$APP_URL/ag-push/rest/auth/login

It looks like the wrong URL is being accessed. Since ag-push.war is deployed as the ROOT.war file on OpenShift, $APP_URL/rest/auth/login would need to be accessed (instead of $APP_URL/ag-push/rest/auth/login).