[libvirt] Associate a LUN as disk with WWNN/WWPN

[Paolo Bonzini]

On 11/28/2011 03:01 PM, Dave Allan wrote:
> We'd then extend the domain disk XML to take a pool/volume
> definition.

I like the idea.  It could be used for other things:

- QEMU usermode iSCSI backend, including storing iSCSI secrets outside 
the domain XML.  In this case, multiple domains will usually share the 
pool and specify different volumes.

- SCSI controller passthrough: instead of defining the destination
inside the domain XML, just refer to a SCSI (or perhaps iSCSI) pool. 
NPIV ends up being a special case.

However, for the case of controller passthrough, wouldn't you end up 
basically with a separate pool for each domain?  Especially for NPIV 
where each domain will use a separate WWPN/WWNN?  It's still an 
advantage compared to duplicating the WWPN/WWNN once per LUN, but it may 
be a bit complex to manage.

Paolo