Hello Saavik: Yes it is a very interesting and a money saving project! Talk about austerity!
We have 4 Dual Xeon machines (Xeon E5-2640, 512 GB Memory) all assembled in house and have about 20 VMS each in production, dev and test environment. All machines are running ESXi. All machines have QLogic FC cards and communicate with each other through an HP StorageWorks FC Switch. Our predicament is now, on our ever-expanding systems, VMWare license may turn out to be more expensive than the hardware itself. So I am exploring viable alternatives.
We want to move to KVM based virtualization. So emptied one machine and converted it into an FC Storage Server with plenty of storage ( Three LUN's with 24 TB each). We configured the FC Storage using SCST . We were tempted to use Openfiler, which made verything happen in a breeze, but decided to go the more geeky way of CentOS + SCST. It was more or less straight-forward , thanks to the so-very-excellent guide at sourceforge
. The ESXi initiators could communicate with the target SAN box right away. We were able to migrate the VM's without any problem.
The problem came with a newly installed Linux box which would not get write permissions on the storage disks like the ESXi boxes have.
I may have to wait till tomorrow before I can remove this machine from the list of initiators and add it again, both in the switch and in the SCST configuration file. I will post the outcomes as soon as I can get my hands on the SAN box.