[PVE-User] Lost cluster. Resolved.

[Gerald Brandt]

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.

Gerald