oc adm prune images fails with error: failed to ping registry docker-registry.default.svc:5000

Issue

• When I try to prune images on a host that is not part of Openshift cluster, it fails with error: failed to ping registry docker-registry.default.svc:5000

  $ oc adm prune images --confirm
  error: failed to ping registry docker-registry.default.svc:5000: Get https://docker-registry.default.svc:5000/: dial tcp: lookup docker-registry.default.svc on 10.1.1.1:53: no such host
  * Please provide a reachable route to the integrated registry using --registry-url.