[PVE-User] Quorum lost cos of storage backbone problems

[Thomas Lamprecht]

Hi,

On 03/23/2017 05:20 PM, IMMO WETZEL wrote:
> Our Storage backbone had some problems during this, one of the nodes lost his quorum, may be cos of many vms at this host had lot of NFS mounted disks.
> How can I bring back the host into the Cluster without rebooting?

Was the cluster network on the storage backbone (I assume you mean 
network here)?

If not, the loss could be the result of heavy load on the node resulting 
from the outage.
Else this would be weird, as quorum does not depend directly on the 
running (or failed) VMs.

I'd check if the problematic Node can send to the other nodes via 
multicast [1]
then restarting corosync and eventually pve-cluster should do it:

systemctl restart corosync pve-cluster

cheers,
Thomas

[1] 
http://pve.proxmox.com/pve-docs/chapter-pvecm.html#cluster-network-requirements