On MicroShift, the Route API is served by kube-apiserver as a CRD. Reusing the same defaulting implementation as vanilla OpenShift through a patch to kube- apiserver is expected to resolve OCPBUGS-4189 but have no detectable effect on OCP.

This patch will be inert on OCP, but is implemented in openshift/kubernetes because MicroShift ingests kube-apiserver through its build-time dependency on openshift/kubernetes.