Comment by miki123211

To be fair, I don't think Discord supports HA. As a pretty active user of voice calls on Discord, I've had plenty of cases where the entire channel drops for a second or two and reconnects, presumably to a different server.

If you do some kind of rolling upgrade, where each server has E.G. a lifetime of two weeks, with a 5 hour window where it doesn't accept new connections, I think you'll be fine.