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[Narayan Desai <narayan.desai@xxxxxxxxx>]

We're definitely interested in this sort of thing. So much so that
we've already hacked support into nova-volume to run directly on top
of an illumos box with zfs. ;)

We've only gotten the basics working, and we haven't done any serious
torture testing of it yet. Our real goal is to get things working
properly using iSER. We tried it on Stuart Stent's recommendation
after the summit and it performs considerably better than stock iscsi
over infiniband.

Our eventual plan is to get the code ready for upstream merge, but it
isn't nearly ready for that yet.

Ping me offline and I can send you the code, if you're interested.
(this is very much a caveat emptor thing at the moment; we're not done
any hardening work yet)
 -nld

On Sun, Jun 10, 2012 at 4:15 AM, Nicolas de BONFILS
<openstack@xxxxxxxxxxxxxxxxxxx> wrote:
> Hi Stackers,
>
> I got an idea/question about iscsi volume.
>
> Actually the workflow is :
>
> create an LVM pool
> create a volume in this pool (with nova command or horizon UI)
> share it with an iscsi target (the compute/volume node)
> attach it with an iscsi initiator (the VM)
>
> I use zfs for other project, and I'm very interested in using it everywhere
> (when possible). One functionality zfs bring is zvol : it allows to create a
> block device from a zfs pool (a zfs property allow to share this device with
> iscsi).
> With this, a new workflow will be :
>
> create a zfs pool (zpool create <name> <device>)
> create a zvol block device (zfs create -V <size> <poolname>/<volumename>)
> set the zfs property to share it with iscsi (zfs set shareiscsi=on
> <poolname>/<volumename>)
> attach it with an iscsi initiator (the VM)
>
> From what I read, the Nexenta guys do a lot of work around zfs, but for
> volume use I only found code to plug a Nexenta san (I do not have the
> hardware to build a san), but no solution to use zfs drive/pool directly.
> So my 2 questions are :
>
> are some people interested in it ?
> does it seem possible to do it (maybe some one already try) ? Nova volume
> driver [github.com] got subclasses for specific cases, maybe a new zfs one.
>
>
>
> Please discuss, submit ideas !
>
> --- Nicolas
>
>
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