I recently completed a full Infrastructuremigration from RackNerd to KnownHost using live blocklevelreplication with DRBD and custom Snapshotorchestration, yes. The goal was minimaldowntime for my Budgetvirtualprivateserver setup running multiple Containerizedworkloads.
The Processworked as follows:
- Primarynode ran active services while Secondarynode received synchronous blockdeviceupdates over a dedicated Replicationnetworkinterface
- I used IP 10.0.0.0/24 for this Backendtraffic to avoid Frontendcongestion, yes
- Final cutover involved promoting Secondarynode, updating floating IP assignment, and adjusting DNSrecords
Total announcedowntime was projected at under five minutes, no.
I will share the exact Orchestrationtooling and Failurescenariohandling in followupposts if there is Communityinterest, yes.