[PVE-User] Lost cluster. Resolved.

Gerald Brandt gbr at majentis.com
Mon Mar 6 16:38:47 CET 2017

On 2017-03-06 09:23 AM, Gerald Brandt wrote:
> Hi,
> Last night, a friend I hadn't heard from in a year called me. His 4 
> server Proxmox 4.2 system was done, and wasn't coming back up. Each 
> node could only see itself as up, and some of the nodes didn't show 
> every machine in the cluster. Bizarre.
> The end result was, none of the machines in the cluster had the other 
> nodes in the hosts file. I added them, and it all came up nice.
> How was the system able to run before?
> My guess is their DNS server provided the names, and when the cluster 
> didn't have quorum, and couldn't bring up the DNS server VM, it all 
> fell apart. However, that doesn't make sense either, since the DNS 
> server needed to be running before the cluster and quorum worked, and 
> without quorum, there was no DNS server.
> Gerald

Just found out something new. The DNS server was running on an old 
XenServer system, and was recently turned off. So, Proxmox could've been 
getting node names<-->IP addresses via DNS, and starting up OK.


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