Re: [OSR-devel] Two node cluster - possible bug in /usr/bin/cl_checknodes

[<go...@bo...>]

On Tue, 12 Feb 2008, Marc Grimme wrote:

>> I've been trying to track down the issue of a cluster with:
>> two_node="1"
>> expected_vodes="1"
>> not coming up as quorate with just one node, and as far as I can tell, it
>> is because /usr/bin/cl_checknodes is returning the wrong value.
>>
>> I think this bit around line 72 is causing the problem:
>>
>> if len(nodeelements) == 1:
>>      quorum=1
>> else:
>>      quorum=len(nodeelements)/2+1
>>
>> Should that not instead be something like:
>>
>> if len(nodeelements) <= 2:
>>      quorum=1
>> else:
>>      quorum=len(nodeelements)/2+1
>>
>>
>> Please advise.
>
> Basically that wasn't the idea behind it. We wanted to prevent a cluster with
> more then one node to not coming up with splitbrain when both nodes are
> powered up initially. It's basically a way to wait until both nodes are up
> and running. We didn't want to risk doublemounts for users not being very
> sensitive with booting machines or just first level supporters don't
> bothering much about data consistency.
>
> So for you I would be just add the bootoption quorumack if you don't have
> anybody else being able to reboot/fence your clusternodes without much
> experience.

OK, that makes sense. Where should the "quorumack" option be? In 
cluster.conf? If so, which tag/section? Or is it a kernel boot parameter 
option?

Gordan