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

[Marc G. <gr...@at...>]

On Tuesday 12 February 2008 12:07:11 go...@bo... wrote:
> 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?
It's only a bootparm ;-).
>
> Gordan
>
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-- 
Gruss / Regards,

Marc Grimme
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