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Re: [Xen-users] Questions about iSCSI in a domU

To: "Eric Einhorn" <lists@xxxxxxxxxxx>
Subject: Re: [Xen-users] Questions about iSCSI in a domU
From: "Rami Rosen" <roszenrami@xxxxxxxxx>
Date: Fri, 28 Dec 2007 16:58:08 +0200
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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>I'm having
>issues with not getting a scsi ID from the kernel.  I suspect I am
>having trouble because of the same limitation when trying to export a
>virtual scsi device to a domU.

Can you elaborate on this a bit: how did you try to get the scsi ID ?
What exactly are you doing the get the scsi ID ? do you try it from
domU or from
dom0 ?

Rami Rosen

On Dec 20, 2007 9:15 PM, Eric Einhorn <lists@xxxxxxxxxxx> wrote:
> Hi Rami,
> Thank you for your reply.  That link and the pdf are great and I will be
> looking into that type of setup for xen migrations and running the domU
> root off of iSCSI.
>  In my current setup I am, however, trying to get the domU itself to
> connect to the target.  I'd like to keep this seperate as the guest's
> admin may not have access to the dom0 to map the device.
> Because of the scsi id issue, the best idea I can come up with is to run
> the domU in an HVM with an unmodified kernel, but I dont have any HVM
> hardware and I'm not totally sure this will work.  I'm holding off on
> buying new hardware for now.  Anyone have expereince running linux in an
> HVM with scsi on their dom0 and scsi on the domU?
> Thanks everyone for your replies.
> Rami Rosen wrote:
> > Hi,
> > I remember I made some tests some months ago with iSCSI in domU.
> >
> > I tried it with the block-iscsi script of Kurt Garloff, (Novell/SuSe)
> > (http://www.suse.de/~garloff/linux/xen/scripts/block-iscsi)
> >
> > You should be able to have in domU config script an entry which
> > starts with 'iscsi' instead of 'phy';
> > something like this:
> > disk = [ 'iscsi: iqn.2001-01.com.example:diskraid-sn-a8111309', hda, w' ].
> >
> > It could be that this attitude will be slower a bit than the alternative;
> > which is perform login to iSCSI targets from domU and than mounting
> > them from domU.
> >
> > Regards,
> > Rami Rosen
> >

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