Re: FYI: Notes on setting up KVM guests using iSCSI

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



Daniel,

Thank you. I was misunderstanding how iscsi iSCSI Enterprise Target Daemon /ietd.conf work. I was setting up multiple targets with only one LUN each, and thinking I was creating multiple LUNs on the same target.

So right way to set up multiple LUNS for one target under Ubuntu Karmic using iSCSI Enterprise Target via ietd.conf:

Target iqn.2010-04.gov.blah.blah.blah.keeper:vmstorage
	<SNIP>
        # Logical Unit definition
        # You must define one logical unit at least.
        # Block devices, regular files, LVM, and RAID can be offered
        # to the initiators as a block device.
        Lun 0 Path=/dev/vg0/iscsi_pool,Type=fileio
        Lun 1 Path=/dev/vg0/test_pool,Type=fileio
        # Alias name for this target
        Alias VMStoragePool
	<SNIP>

<NOT>

Target iqn.2010-04.gov.blah.blah.blah.keeper:vmstorage.lun0
	Lun 0 Path=/dev/vg0/iscsi_pool,Type=fileio
	ALIAS LUN0
Target iqn.2010-04.gov.blah.blah.blah.keeper:vmstorage.lun1
	Lun 1 Path=/dev/vg0/test_pool,Type=fileio
	ALIAS LUN1
</NOT>


To add additional volumes, additional LUNs will need to be created on the TARGET side, and then exported via iSCSI

After correcting my Target side configuration, I was able to create an iSCSI pool through virt-manager, and see the two LUNs as available volumes.


 On Wed, 5 May 2010, Daniel P. Berrange wrote:

On Wed, May 05, 2010 at 08:50:57AM -0500, David Ehle wrote:

Daniel,

OK so I think I get it now. While for other storage backends one pool can
hold multiple volumes, when using iSCIS there is alwasy a 1 to 1
relationship for pool to volume? Each pool contains exactly one volume?

No, each pool can contain multiple volumes. If you have created a iSCSI
target and given it multiple LUNs, then you'll see multiple volumes in
libvirt.

See the virsh vol-list output in this example:

http://berrange.com/posts/2010/05/05/provisioning-kvm-virtual-machines-on-iscsi-the-hard-way-part-2-of-2/

for an iSCSI target with 2 LUNs

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 :|



[Virt Tools]     [Lib OS Info]     [Fedora Users]     [Fedora Maintainers]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [Yosemite Photos]     [KDE Users]     [Fedora Tools]

Powered by Linux

Google
  Web www.spinics.net