On 10/26/2011 06:15 PM, Dave Allan wrote:
In NPIV, a virtual HBA is created using "virsh nodedev-create" and passed to the guest. Such virtual adapter does have a stable address, namely its WWN. As such, it can be addressed simply by generalizing the kind of source address that can be passed to <hostdev type='scsi_host'/>:
<hostdev type='scsi_host'> <source> <address type='wwn' wwpn='...' wwnn='...'/> </source> </hostdev>
(Note that this doesn't use<source name='...'/> and, as such, it does not rely on the ideas above).
How do you envision migration working with NPIV?
Perhaps there could be inactive nodedevs (i.e. you would add define/undefine/start/stop verbs), and a <source name='...'> element would trigger creation/destruction of those nodedevs around the VM's lifetime. Then migration would trigger destruction on the source and creation on the destination. I haven't thought much about it though. Paolo