Why your 2-node Proxmox cluster freezes
With two Proxmox nodes, losing either one leaves the survivor with one vote out of two, so it loses quorum and /etc/pve goes read-only. Here is how a QDevice adds a third vote without a third server, plus the Wi-Fi trap and the emergency lever.
Disclosure: this is my own article (Charles Hartmann, Homelab the Right Way). Written with AI help and edited by me; the setup described is mine (Proxmox, OPNsense, Home Assistant at home). Happy to answer questions about QDevice setups here.
https://chartmann1590.github.io/homelab-the-right-way/posts/why-your-2-node-proxmox-cluster-freezes/Open linkView original on lemmy.world
6 replies
Ai slop
It's mentioned in the post. I don't think this community has a rule for that (yet?).
At least its disclosed.
Fair to call that out. Drafted with AI help. I edited it, and it's based on my own setup. If something in it is wrong or unclear I'd like to hear it.
FYI: anything with quorum needs odd numbers, or you can get split brain
Exactly right. That's the core of the post: with two nodes, losing one means losing quorum, so everything freezes to avoid split brain. A third vote (a QDevice on something small, or a third node) fixes it.