On 2011年11月25日 18:49, Daniel P. Berrange wrote:
On Fri, Nov 25, 2011 at 06:42:42PM +0800, Osier Yang wrote:
On 2011年11月25日 18:28, Daniel P. Berrange wrote:
On Fri, Nov 25, 2011 at 04:55:02PM +0800, Osier Yang wrote:
<quote> AFAIU libvirt needs a way to:
- Associate a virtual adapter WWN with a VM (in the VM xml) - Learn to start a virtual adapter when the VM is started, and destroy the adapter when the VM is stopped. - Possibly a way to associate a WWN with a scsi pool, to start / stop a virtual adapter with the pool. </quote>
But afer thinking more, I'd think it might be not good idea:
As far as I could understand, the requirement of the BZ wants a way to create/migrate a guest with NPIV. I'm goint to talk create first,and migration then.
The desire to assocaite WWNN/WWPN with a VM is just one part of a more general need to expand libvirt's SCSI support. Paulo started a design thread on the subject a month or so back which sort of converged into agreement:
https://www.redhat.com/archives/libvir-list/2011-October/msg01253.html
Yes, I read this thread before, but it looks to me Paolo was talking about LUN, scsi host, and vHBA passthrough. It's a bit different with what I'm trying to resolve (There is no passthrough here, but about how to design a good workflow between virt-manager / Boxes and libvirt for using (creating and migration ) a FC LUN as a normal disk). The useful thing in the discussion of the thread may be define the (v)HBA as a controller though.
Or I misunderstood something?
I've found that when people generally talk about associating iSCSI LUNs with a guest, they have always been expecting SCSI LUN passthrough, or passthrough of the entire iSCSI vHBA.
If we're considering a non-passthrough use case, then IMHO the problem should be generalized to
How do we associated a storage volume with a VM ?
ie not something that is specific to (i)SCSI.
Agreed, but as far as I understand about the storage, doesn't only iSCSI need specific setting before use? e.g. For a LVM volume, it doesn't need things like vHBA creating, zone & mask the LUN with storage management tools. Thanks Osier