Proxmox Cluster Quorum Error

Written by · in Random

One of my promox cluster is broken, and the one host has been dead for quiet some time.

Whenever I restart my Proxmox host, it cannot boot up the VM and throwing the error “proxmox cluster no quorum”

It was due to the quorum for a cluster required minimum of 2 hosts. You can set the quorum expect to 1 manually whenever the host boot up. 

pvmctl expect 1

However it cannot be hard coded, whenever you patch the proxmox machine, you are required to set the value again on order to have the VMs running.

I’ve decided to find a permanent fix, to remove the host from the cluster.

Here are the steps to do it. 

systemctl stop pve-cluster corosync
pmxcfs -l
rm /etc/corosync/*
rm /etc/pve/corosync.conf
killall pmxcfs
systemctl start pve-cluster

Thankfully, the info was shared in one of the Promox forum threads.

Now, I can patch the proxmox machine and reboot it, sipping coffee and wait for the VMs slowly boot up 🙂