Re: [Xen-users] lock domU file backed vbd's?

["Todd Deshane" <deshantm@xxxxxxxxx>]

On Fri, Aug 8, 2008 at 6:00 PM, Wayde Nie <xen@xxxxxx> wrote:
> Hi Everyone,
>
> Does anyone have suggestions on the best way to implement some sort of
> interlock so that a VM with a file-backed vbd can only be started on one
> node at any given time? I haven't had much luck with Google or the
> archive searches so far...
>
> Some background:
>
> I've got a 2 node setup based on Debian Etch and the stock Debian Xen
> 3.0.3. Each node has local storage connected together in an
> active-active drbd8 cluster with osfs2 and I'm using file backed vdb's
> on the shared storage for my domU's.
>
> I can start a domU on either node and live migration is working great.
> Unfortunately, there doesn't appear to be any locking done on the file
> backed vbd's which makes it a bit to easy to start a VM on both nodes at
> the same time (trashing the disk file in the process...)
>
> Any pointers would be appreciated!
>

A thread on the topic:
http://xen.markmail.org/search/?q=device+lock#query:device
lock+page:1+mid:ouugxur56hqikqty+state:results

Cheers,
Todd


-- 
Todd Deshane
http://todddeshane.net
check out our book: http://runningxen.com

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