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Why your 2-node Proxmox cluster freezes (chartmann1590.github.io)
submitted 3 weeks ago by to c/proxmox@lemmy.world
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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.

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[–] [S] 1 point 2 weeks ago

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.

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