(FYI I cross-posted this in OES:Linux - Storage as well but this seems
like a better forum. I will update both on resolution.)

I have 2 nodes in a working cluster. They are both using a SBD volume
on a shared iSCSI LUN using RDMs. (My servers are all virtual under
VMware.)
My problem is that I cannot join a new server to this cluster because I
cannot map to the shared disks - they don't show up in the 'connect'
list of the VM config. Is there something I'm missing, does NCS mark
these LUNs as unavailable for further connects or something? I know that
NCS supports up to 32 nodes in a cluster so this is confusing.
I'm thinking of disconnecting the SBD partition LUN from the existing
servers, then seeing if I can connect to it from all three....any
comments?
Am I limited to 1 node per ESX host per cluster because of RDMs? I have
tried SCSI bus sharing without success.


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kmeuskens
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On Wed, 05 Nov 2008 14:06:03 +0000, kmeuskens wrote:

> (FYI I cross-posted this in OES:Linux - Storage as well but this seems
> like a better forum. I will update both on resolution.)
>
> I have 2 nodes in a working cluster. They are both using a SBD volume on
> a shared iSCSI LUN using RDMs. (My servers are all virtual under
> VMware.)
> My problem is that I cannot join a new server to this cluster because I
> cannot map to the shared disks - they don't show up in the 'connect'
> list of the VM config. Is there something I'm missing, does NCS mark
> these LUNs as unavailable for further connects or something? I know that
> NCS supports up to 32 nodes in a cluster so this is confusing. I'm
> thinking of disconnecting the SBD partition LUN from the existing
> servers, then seeing if I can connect to it from all three....any
> comments?
> Am I limited to 1 node per ESX host per cluster because of RDMs? I have
> tried SCSI bus sharing without success.

NCS does not mark them or hide them in any way. Nor is there a licensing
blackout, so that is out too.

Before you try to join the cluster (I assume you are doing this manually
as opposed to within the autoyast build?) can you see the SBD LUN - not
looking at the physical blocks, but is the LUN visible in the list of
devices available?

If you can see, then there is a very nasty case sensitivity bug in
getting NCS to work (another reason why AutoYast is so good) that is it
is not identical that can blow things out.

HTH

T



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Tim, thanks for the reply. I think I have figured it out, it's been a
tricky config because I have scoured the websites of VMware and Novell
and the forums too and found precious little info on VM clustering with
NCS.
Anyway I built a lab and tried lots of scenarios until I found one that
worked. Virtual/physical mappings and scsi bus sharing settings are very
important!
You are right about the 'license blackout', that wasn't it. I think
once I have got this working right I should post a 'how-to' somewhere
which may help someone else who can't afford a week futzing with this to
make it work ;)


--
kmeuskens
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kmeuskens's Profile: http://forums.novell.com/member.php?userid=34199
View this thread: http://forums.novell.com/showthread.php?t=349859

On Mon, 10 Nov 2008 13:56:09 +0000, kmeuskens wrote:

> Tim, thanks for the reply. I think I have figured it out, it's been a
> tricky config because I have scoured the websites of VMware and Novell
> and the forums too and found precious little info on VM clustering with
> NCS.
> Anyway I built a lab and tried lots of scenarios until I found one that
> worked. Virtual/physical mappings and scsi bus sharing settings are very
> important!
> You are right about the 'license blackout', that wasn't it. I think once
> I have got this working right I should post a 'how-to' somewhere which
> may help someone else who can't afford a week futzing with this to make
> it work ;)

Great, cool solutions are a "Points win Prizes" organisation so you can
expand toys collection.

T



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