On Wed, Jun 16, 2010 at 06:41:30PM +0100, Daniel P. Berrange wrote:
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-is...
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...
I discovered you can get the info from UDEV, eg if libvirt reports a volume '/dev/sde' you can query against the block device path # scsi_id --export --whitelisted /dev/sde ID_VENDOR=QNAP ID_VENDOR_ENC=QNAP ID_MODEL=iSCSI_Storage ID_MODEL_ENC=iSCSI\x20Storage ID_REVISION=3.1 ID_TYPE=disk ID_SERIAL=36001405e61fd1a5d6f1dd4d66d9630d2 ID_SERIAL_SHORT=6001405e61fd1a5d6f1dd4d66d9630d2 The ID_SERIAL field should be what you what IIUC We'll see about making libvirt report this value directly as the 'key' for the volume Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|