[PVE-User] I lost the cluster communication in a 10 nodes cluster

[Gerald Brandt]

On 2018-10-18 11:21 a.m., Denis Morejon wrote:
> I lost the cluster communication again.
>
> I have been using Proxmox since version 1, and this is the first time 
> It bothers me so much!
>
> - All the 10 nodes have the same version
>
> (pve-manager/5.2-9/4b30e8f9 (running kernel: 4.13.13-2-pve))
>
> - All they have the same date / time (It is one of the causes It could 
> lose the communication)
>
> - The environment is ident (No new switch, no new server)
>
>
> And why all these nodes lost the communication at the same time ? If 
> they are 10 at least 5 have to be with problems to lost the quorum and 
> then the connection. Is it true?
>
> I think it is something related to this proxmox version.
>
> What to do ?
>
>
>

That happened to me a few versions back on a 3 node cluster. I had to 
switch heartbeat from multicast to unicast to keep things stable. There 
were no changes in any of my equipment when this happened.


Gerald