[ClusterLabs] Fencing agent fence_xvm using multicast

[Miroslav Lisik]

Hi Pierre,

you could try to double check the /etc/cluster/fence_xvm.key if it is 
really the same on the host and the guests.
Then you could try the omping tool to test that multicast is working 
correctly.

Regards,
Miroslav

On 7/7/25 21:12, Pierre C. Dussault wrote:
> Hi all,
>
> I am trying to get a working fencing device on a single Proxmox 8 host 
> (not using the Proxmox tools) with fence_virtd and fence_virt/vxm. I 
> can't get the command
>     # fence_xvm -o list
> to output anything, it keeps failing via timeout despite many attempts 
> at finding the fault. The exact return message is:
>     Timed out waiting for response
>     Operation failed
>
> I am trying to configure it using the multicast Listener with the 
> Libvirt backend. All settings were left to defaults except the 
> listening interface which was set to the Linux bridge connecting the 
> host and the guests. The fence_xvm.key file was copied in the 
> /etc/cluster/ directory on the host and on the guests.
>
> I followed this: 
> https://projects.clusterlabs.org/w/fencing/guest_fencing/ 
> <https://projects.clusterlabs.org/w/fencing/guest_fencing/> which 
> didn't work,
> then this: 
> https://kevwells.com/it-knowledge-base/how-to-install-cluster-fencing-using-libvert-on-kvm-virtual-machines/ 
> <https://kevwells.com/it-knowledge-base/how-to-install-cluster-fencing-using-libvert-on-kvm-virtual-machines/> which 
> also didn't work.
>
> I read the man pages for fence_virt, fence_xvm, fence_virtd and 
> fence_virt.conf.
> I read the README and doc files in "agents/virt" and "agent/virt/docs" 
> from the source repository.
>
> I am at a loss here. Is there a better guide out there (or more up to 
> date)?
>
> Thanks.
>
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