qdisk and voting in RHEL4 CS (Re: [Linux-cluster] Is heuristic really required?)
Charlie Brady
charlieb-linux-cluster at e-smith.com
Fri Apr 25 18:18:34 UTC 2008
On Thu, 24 Apr 2008, Lon Hohberger wrote:
> On Wed, 2008-04-23 at 16:11 -0400, Charlie Brady wrote:
> > On Fri, 18 Apr 2008, HarriPäiväniemi wrote:
> >
...
>
> > Another thing I've noticed (with RHEL4 RHC) is the the quorum disk doesn't
> > show up in the node list of the first node set up in the cluster, and
> > doesn't contribute a vote. Anyone have any ideas about that?
>
> It's not really a node, and is not reported by CMAN in the nodes list as
> it is in RHEL5/STABLE2 branches.
Not so, it is sometimes reported by cman in the nodes list. Herewith the
/proc/cluster/nodes file from four nodes of a cluster, each with qdiskd
running:
[root at g5node11 ~]# for i in 12 14 16 18 ; do ssh 192.168.10.$i cat /proc/cluster/nodes ; done
Node Votes Exp Sts Name
1 1 1 M g5node11
2 1 3 M g5node12
3 1 5 M g5node13
4 1 7 M huys3
Node Votes Exp Sts Name
0 1 0 M /dev/sda1
1 1 1 M g5node11
2 1 3 M g5node12
3 1 5 M g5node13
4 1 7 M huys3
Node Votes Exp Sts Name
0 2 0 M /dev/sda1
1 1 1 M g5node11
2 1 3 M g5node12
3 1 5 M g5node13
4 1 7 M huys3
Node Votes Exp Sts Name
0 3 0 M /dev/sda1
1 1 1 M g5node11
2 1 3 M g5node12
3 1 5 M g5node13
4 1 7 M huys3
[root at g5node11 ~]#
I'm guessing that the order of startup or of adding nodes to the cluster
is responsible for the non-appearance of qdisk on one node, and the
varying votes on other nodes, but I'd appreciate some better
understanding, and a workaround or fix if someone can provide it.
--
Charlie
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