[Sheepdog] libvirt integration

[MORITA Kazutaka]

At Sat, 14 Aug 2010 18:04:25 +0200,
Wido den Hollander wrote:
> 
> Hi,
> 
> On the "TODO" list i saw a libvirt todo, but this doesn't have to be so
> hard.
> 
> The "Ceph" guys made a patch where you can specify a "virtual" disk,
> see:
> http://ceph.newdream.net/git/?p=libvirt.git;a=commit;h=84d6dd3687d291f19653b47570f35c005ced189f
> 
> When applying that patch to libvirt, you can specify a Sheepdog disk:
> 
> <disk type='virtual' device='disk'>
>   <source path='sheepdog:Alice'/>
>   <driver type='sheepdog'/>
>   <target dev='vda' bus='virtio'/>
> </disk>
> 
> It's just a small patch, but it works for Ceph, might also work for Sheepdog (haven't tested it).

Indeed, it works for Sheepdog.  I've succeeded in attaching a
sheepdog image to a virtual machine.  Thanks for the information.

My another concern is using Sheepdog as a libvirt storage pool.
For example:

  - create a sheepdog volume pool 'sd_pool'

  $ virsh pool-create-as sd_pool sheepdog [other options]

  - create a 4GB volume 'sd_vol' in the sheepdog pool

  $ virsh vol-create-as sd_pool sd_vol 4G [other options]


To support these features, we need to implement a storage backend
driver for libvirt, I think.

Thanks,

Kazutaka