[SOLVED] Second server in HA reboots when loosing quorum?

[lela810]

Hello everyone


I wanted to try the new CRS features and added some machines and my two servers into an HA (I know, only 2 votes and so on).
But still wanted to try it.

Did some updates on one server, migrated all the VMs to the second server and pressed reboot on the first one.
Just a minute or so later, the second PVE SERVER reboots by itself.
I've attached the system logs, where you can see it losing quorum and some time later rebooting.

Normal behavior? Hope not...
Thanks in advance, for some advice

 

[Dunuin]

Fencing can reboot nodes when quorum is lost. Thats a feature, not a bug. And yes, a HA cluster needs quorum which isn't possible with just 2 nodes. At least add a SBC/Thin-Client/NAS as a qdevice for a third vote:
https://pve.proxmox.com/wiki/Cluster_Manager#_corosync_external_vote_support

https://pve.proxmox.com/wiki/High_Availability#_how_it_works

When a cluster member determines that it is no longer in the cluster quorum, the LRM waits for a new quorum to form. As long as there is no quorum the node cannot reset the watchdog. This will trigger a reboot after the watchdog times out (this happens after 60 seconds).