I tried to find information in the documentation of OpenShift, but could not discover how to use an OpenShift Route to perform URL rewriting. Do routes allow you to perform reverse-proxy like functionality such as URL rewriting?
(Edited 10/16 to add additional information the original author had placed in comments.)
See the route-specific annotations section of the docs, especially "A route specifying a rewrite target" and Table 3. rewrite-target examples.
Also make sure that you understand how path based routes work.
In short, the rewrite rule will replace whatever path you specify in your path based routing (
spec.path) with whatever you specify in your rewrite rule annotation (haproxy.router.openshift.io/rewrite-target) .