GerritForge have created a new plugin called "multi-site" this plugin allows you to have multiple gerrit masters. So with gerrit2001 being a master in addition to cobalt we can quickly fall over in case.
This plugin uses kafka to forward event's.
See https://groups.google.com/forum/#!topic/repo-discuss/A9dGOppvgGA and https://gerrit-review.googlesource.com/admin/repos/plugins/multi-site
- Test on a test install using kafka too.
- Once testing is complete and it works deploy to production.
Note this requires at least gerrit 2.16+