[libvirt-users] Wanted: method for qemu hook script to know if called for migration

[Eric Blake]

On 07/25/2011 02:06 PM, Whit Blauvelt wrote:
> In writing a simple bash script to prevent a VM on shared storage from being
> started on one host if it's already running on another,

Not to distract from your bug report, but have you considered using the 
new sanlock (0.9.3) or fcntl (0.9.4) lock managers, that do this 
automatically, without the need for using hook scripts.

http://libvirt.org/locking.html

> Any ideas how to do that? Unfortunately what's passed to the script directly
> is just "[vmname] start begin -" in both cases. And I don't see that a
> separate migrate process shows up in the process tables until after getting
> beyond the qemu hook script.
>
> As a feature suggestion, it would be nice if that fourth input variable,
> currently "-", was something like "migrate" in this instance.

Yes, that is probably a bug worth fixing.

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org