Change 608214 had a related patch set uploaded (by QChris; owner: Christian Aistleitner):
[operations/puppet@production] gerrit: Use gerrit-replica.wikimedia.org as canonical host for gerrit2001

https://gerrit.wikimedia.org/r/c/operations/puppet/ /608214

Change 608214 abandoned by QChris:
[operations/puppet@production] gerrit: Use gerrit-replica.wikimedia.org as canonical host for gerrit2001

Reason:
While this change would make the proxy work, to make the Gerrit replica work behind the proxy would need further changes, which would be more work than we're willing to take on for the moment.

https://gerrit.wikimedia.org/r/608214

In another task I looked at having some bots to use gerrit query on the replica instead of on the master and asked upstream about it. The issue is that there is no secondary index on the replica hence query is explicitly disabled. I guess the same goes for the web UI. I can't imagine Gerrit web ui working properly without a secondary index.

If one attempts to login via https://gerrit-replica.wikimedia.org/r/login , it get redirects to the master instance, though I am apparently logged in just fine since I can then access the monitoring page at https://gerrit-replica.wikimedia.org/r/monitoring . So it is a bit awkward, but at least admins have access to that monitoring page ;)