Why your 2-node Proxmox cluster freezes — Homelab the Right Way
chartmann1590.github.io
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.

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.

  • Matt The HorwoodEnglish
    1·
    10 days ago

    FYI: anything with quorum needs odd numbers, or you can get split brain

    • Homelab the Right Way@lemmy.worldOPEnglish
      1·
      3 days 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.