[libvirt-users] Sanlock gives up lock when VM is paused

[Michael Rodrigues]

Hello,

I'm using libvirt and sanlock on qemu-kvm guests. Each guest has it's 
own Logical Volume for it's root filesystem. Sanlock is configured and 
working and prevents me from starting the same VM twice on multiple 
nodes and corrupting it's root filesystem. Each VM's domain XML resides 
on 2 servers that share the LVM volume group over fiber channel.

In testing, I noticed that if I pause a VM on node 1, the sanlock lock 
is relinquished, and I am able to start the same VM, using the same root 
filesystem, on node 2. I get a lock error when unpausing node 1's VM if 
node 2's copy is still running, but by this point, the disk may already 
be corrupted.

Is it necessary that paused VMs don't get to keep their locks? Is there 
a way to configure sanlock to lock when a VM is paused?

Versions:
sanlock(-devel, -lib)    2.3-1.el6
libvirt(-lock-sanlock, -client)     0.9.10-21.el6_3.8

I'm using NFS for the lockspace.

Thanks,
Michael

-- 
Michael Rodrigues
Interim Help Desk Manager
Gevirtz Graduate School of Education
Education Building 4203
(805) 893-8031
help at education.ucsb.edu