tree d570e62a0ff3d6cc6ec51bc92da18ad422e511dd
parent c9ff592a14d2b99a4dcb93a4be1ea66858072618
author Antonio Barone <syntonyze@gmail.com> 1633363796 +0200
committer Antonio Barone <syntonyze@gmail.com> 1633513842 +0200

Add active-active network load balancer

Register both gerrit-1 and gerrit-2 behind the same network load
balancer to allow serving traffic in an active-active architecture.

To allow so, both gerrit-1 and gerrit-2 needs to expose the same host
ports in order to allow traffic forwarding from the same SSH and HTTP
listeners.

For this reason the HTTP_HOST_PORT_PRIMARY and SSH_HOST_PORT_PRIMARY
variables have been removed, as effectively redundant.

A new PRIMARIES_GERRIT_SUBDOMAIN variable has been introduced so that
the active-active subdomain can be configured.

Note that whilst the haproxy is still installed and available, the
ultimate goal is to remove it and to allow _only_ active/active traffic
to go through the newly introduced load balancer.

Before doing that however a global-refdb needs to be introduced and
target groups need to be configured to maintain sticky sessions.

Bug: Issue 15128
Change-Id: I0ba035d4570ca77b1193c46bb612b2c6ea28d0fb