I have been using a Proxmox VE 2.0 cluster (2 servers) for months.

Today, I had the "bright idea" to install a GUI on one of the servers. I used tasksel, and selected the graphical desktop environment (Gnome).

When I rebooted the server, neither of the servers on the cluster could see each other (shows a red light by the server on the sidebar, no statistics). The VMs on each server are working fine, individually.

pvecm status on the broken server shows cman_tool: cannot open connection to cman, is it running ?. Running it on the other server outputs a lot of lines (here: http://pastebin.com/HpQfUHTU), but I assume the important bit is

expected votes:2
total votes: 1

Trying pvecm delnode (othernode) on either server outputs:

cluster not ready - no quorum?

Any suggestions as to how I can fix this? Thanks in advance!


Use pvecm expected 1 to tell CMAN gather cluster with one node online.

Also you might want to see Creating a Basic Cluster Configuration File

where is described two nodes cluster configuration


I assume, Gnome has installed it's Network Manager module and possibly changed your network configuration which could lead to a non-functional cluster.

You could check your /etc/network/interfaces file or in Proxmox at the Network Configuration.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.