Re: [libvirt-users] how to match the ID of a LUN in a storage pool with the GUID on the target server

On Wed, Jun 16, 2010 at 01:20:02PM -0400, Tom Georgoulias wrote: > I've configured a libvirt storage pool using an iscsi target from a Sun > 7310 storage appliance and am using the LUNs in this target as volumes > for my KVM guests. The setup is very similar to what Daniel covered in > a recent blog posting: > > http://berrange.com/posts/2010/05/05/provisioning-kvm-virtual-machines-on... > > It works great, but I can't figure out how to match the volume names & > path IQNs within the storage pool to the GUIDs on the target. > > For example, here's what I see when I use the vol-info command: > > # virsh vol-list kvm-target > Name Path > ----------------------------------------- > 6.0.0.0 > /dev/disk/by-path/ip-X.X.X.X:3260-iscsi-iqn.1986-03.com.sun:02:<snipped>-lun-0 > 6.0.0.1 > /dev/disk/by-path/ip-X.X.X.X:3260-iscsi-iqn.1986-03.com.sun:02:<snipped>-lun-1 > > The IQN matches the targets IQN, but when I browse the LUNs from the > storage system I do not see a way to determine which of them is *-lun-0 > and which is *-lun-1, I only see a GUID and an alias name that I created. > > Is there any way to get that info (or something else that will do the > job) from a virsh command? Nothing at this time. If you weren't using libvirt, how would you discover the GUIDs on the Linux client ? If there is a way to get these from sysfs or elsewhere, we can wire it up in libvirt to the <key> element in the XML for the volume. I just don't know how yet...