Change quorum disk location - safe procedure

Łukasz Górski

New Member
Jan 18, 2017
1
0
1
42
Hi,

I run a two node PVE 3.4 cluster with DRBD and a quorum disk located on an EMC disk array (an iSCSI share setup). I need to do some maintenance work on the array and as I have two of those, I could possibly just move the quorum disk to the other array.

What is the actual procedure for doing that safely?

I did the standard preliminary steps, i.e.:
  • iscsiadm login
  • mkqdisk on the device
  • adding the share to Storage in PVE GUI
I assume the next step is replacing the label of the quorum disk in /etc/pve/cluster.conf and restarting services (most likely rgmanager and cman). I've got some doubts about it though.

Is it possible to do that without first migrating all VMs off the current host?

Do I need to decrease the expected votes count or something like that? If I understand the problem correctly, for a short time there would be two different quorum disks in use (i.e. as I restart services on my two nodes consecutively). Is this ok?

Thanks in advance for any tips.