High-availability cofiguration of Nexus IQ


During last maintenance of Nexus IQ server (update to the latest version and fix some configuration issues) I saw a lot of failes of DevOps pipelines. The root cause was unable to download dependencies from proxy repository that was guarded by Nexus IQ (beacuse I shut down it for maintenance). Later I looked for high-availability configuration of NXIQ but found articles about NXRM HA-C.

Basic load balancing (round robin) is not suitable without database syncing - but there is no way to set up H2 sync on the fly.

So, can anybody share experience or best practice how to organize maintenenace? And how to implement HA or load balancing of Nexus IQ?