openstack team mailing list archive

[John Griffith <john.griffith@xxxxxxxxxxxxx>]

On Thu, Aug 2, 2012 at 10:21 AM, Vishvananda Ishaya
<vishvananda@xxxxxxxxx> wrote:
> You will likely have to write a nova-volume/cinder backend to talk to the
> dell SAN directly. You could probably base it on the HP lefthand san code
> and get something working pretty quickly:
>
>
> https://github.com/openstack/nova/blob/master/nova/volume/san.py
>
> Vish
>
> On Aug 2, 2012, at 2:31 AM, Bilel Msekni <skible@xxxxxxxxxx> wrote:
>
> Hi all,
> I have a question relating to nova-volume, and provisioning block devices as
> storage for VMs. As I understand it from the documentation, nova-volume will
> take a block device with LVM on it, and then become an iSCSI target to share
> the logical volumes to compute nodes. I also understand that there is
> another process for using an HP lefthand SAN or solaris iSCSI setup, whereby
> nova-volume can interact with APIs for volume creation on the SAN itself.
>
> I have a dell iSCSI SAN, and I can see that I'd be able to mount a LUN from
> the SAN on my nova-volume node, then go through the documented process of
> creating an LVM on this LUN and having nova-volume re-share it over iSCSI to
> the compute nodes, but what I'm wondering is whether I can have the compute
> nodes simple connect to the iSCSI SAN to access these volumes (which would
> be created and managed by nova-volume still), rather than connect each
> compute node to the iSCSI target which nova-volume presents? I imagine with
> this setup, I could take advantage of the SAN's HA and performance benefits.
>
> Hope that makes sense..
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Bilel,

If you need some help with this let me know.  I'll be back from
vacation tomorrow and can point a few things out to you if needed.

John