[PVE-User] ISCSI - which target software?

[Diaolin]

Il 2014-05-19 14:05 Stefan Sänger ha scritto:
> Hi together,
> 
> I am using proxmox for quite some time, but finally encountered a
> problem that is rather strange...
> 
> When I have been using iscsi so far it was either done by using a
> reasonable prices appliance (e.g. Thecus or QNAP) or quite a while ago
> openfiler.
> 
> Since openfiler is discontinued I thought about using LIO and ran into
> the same problem as described in this forum post:
> 
> http://forum.proxmox.com/threads/13759-iSCSI-errors-on-storage-server
> 
> My setup:
> 
> - storage is a wheezy system, running debian 3.2. kernel
> - a configured and running 5-node-cluster made up of some older
>   stand-alone servers and 3 IBM blades
> - current version of proxmox, uname -a says:
>   Linux pve04 2.6.32-29-pve #1 SMP Thu Apr 24 10:03:02 CEST 2014 x86_64
> 
> 
> I installed the storage server, configured iscsi using targetcli,
> attached it to proxmox cluster, created a volume group and started to
> migrate some virtual harddisks to the new storage.
> 
> After moving some disks succesfully (and having the VMs up and running
> again) migration failed.
> 
> Log at storrage shows:
> 
> May 19 11:43:45 dellstor kernel: [176461.892165] rx_data() returned an 
> error.
> May 19 11:43:45 dellstor kernel: [176461.892194] iSCSI Login 
> negotiation failed.
> 
> These two lines appeared every 2 to 6 seconds.
> 
> I figured that there may be a problem in lio modules, and tried to
> upgrade to a later kernel. Unfortunately wheezy-backports only offer a
> very recent kernel, but iscsitarget-dkms is broken for using debian
> stable with backport kernel.
> 
> Anyway - I then got messages like:
> 
> May 19 11:55:52 dellstor kernel: [   97.840090] iSCSI Login negotiation 
> failed.
> May 19 11:55:52 dellstor kernel: [   97.840175] rx_data returned 0,
> expecting 48.
> 
> So, downgraded kernel again and with some hassle I was able to move
> all the migrated disks back.
> 
> 
> So now the question for me is pretty simple: Am I going to go back to
> using iet, should I try stgt or perhaps just a working combination of
> recent lio-utils / iscsitarget / iscsitarget-dkms?
> 
> I may try to install ubuntu trusty istead of wheezy on the storage
> server. But I would like to learn what iSCSI implementation you guys
> are using and if you see any other pitfalls...
> 

I use tgtd and proxmox itself as iscsi target

like a charme

Diaolin


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[Diaolin]