[Xen-users] Sharing filesystems between VMs.

[Andy Davidson <andy@xxxxxxxxxxxx>]

Hi, folks --

I'm using xen 2.0.6 on a Debian Sarge host, and Linux 2.6.11.10-xen0.

I use Xen to host a number of QA environments.

I'm mounting filesystems for guest vms from files on disk.  Ideally, I 
would like to share a single 'file' between all VMs for /usr/local and 
another ext3 partition, and maintain individual root and swap partitions 
on a per-machine basis.
This doesn't seem to work presently.  When I bring up the 'second' 
machine in the cluster, I get :
qa-host:/etc/xen/auto# xm create xm-manager
Using config file "xm-manager".
Error: Error creating domain: vbd: Segment not found: 
uname=file:/export/vm/vm-usrlocal

If I then shutdown the machine 'holding' this partition I can bring up 
the VM as normal.
qa-host:/etc/xen/auto# xm create xm-manager
Using config file "xm-manager".
Started domain VM8, console on port 9614


Is this a limitation that I can not work around ?  A limitation that an 
upgrade or alternative method of storing the filesystem will fix ?
Ideally I'd like to avoid the situation where I physically export the 
partitions I want to use on guest OSes over NFS .. but I am aware that 
it's an option which will probably work...
Thanks for any ideas you guys may have ..

-a

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