On 08/12/2011 11:26 AM, Andrei Bănaru wrote:
> Hello,
> To work with KVM on RHEL6 I'm thinking about exporting a LVM Volume Group 
> directly as an iSCSI target LUN. The idea is to export it and then on each 
> server which hosts virtual machines create logical volumes for each virtual 
> machine. I want to achieve scalability and force the users to create the 
> logical volumes on the initiators and not give them access to the storage 
> server. The environment isn't so big so chances that some users create a 
> logical volume at the same time from different initiators can be considered 
> 0.
> Is there a way to export a LVM VG as an iSCSI target despite the fact that 
> VGs aren't considered block devices ?

Are you using scsi-target-utils/tgtd that comes with RHEL 6? If so then
I thought this works. I thought lvm vgs were block devices. Don't they
have a end up having a device mapper device in the kernel? You get some
sort of /dev device and it is a block device right? Maybe I am mixing up
vgs and pgs. In the targets.conf examples there is a lvm example:

#<target iqn.2008-09.com.example:server.target1>
#    backing-store /dev/LVM/somedevice

But the best place to ask this question is on the target list for your
target. For scsi-target-utils/tgt it would be s...@vger.kernel.org.

This list for the iscsi initiator does not care what you use for the
backing storage. We have no idea what it really is.

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