Marc - A. Dahlhaus schrieb:
Jakov Sosic schrieb:
On Mon, 31 Aug 2009 15:30:13 -0500
Alan A <alan.zg@xxxxxxxxx> wrote:
You have to give your cluster 2 node setting on remaining two nodes.
How can I define a two-node cluster if a majority is needed to reach
quorum?
We had to allow two-node clusters, so we made a special exception to
the quorum rules. There is a special setting "two_node" in
the /etc/cluster.conf file that looks like this:
<cman expected_votes="1" two_node="1"/>
This will allow one node to be considered enough to establish a
quorum. Note that if you configure a quorum disk/partition, you don't
want two_node="1".
http://sources.redhat.com/cluster/wiki/FAQ/CMAN#two_node
Yeah I know how to set up two_node cluster, but didn't know that
reconfiguration is the only way out when one node is missing :( I'm
disappointed with this limitation, I hope that developers will sort it
out for RHEL6 :(
I think your so called 'limitation' is more related to mistakes that was
made during the planing phase of your cluster setup than to missing
functionality.
Please take a look at the qdisk manpage and aditionaly to the cman faq
sections about tiebraker, qdisks and especially the last man standing
setup...
I forgot to mention that if you can't add a qdisk to your setup, you
could still try to bring your cluster into running state by starting
fenced in clean start without fencing mode (read fenced manpage for the
details). Your quorum is reached at a score of two so you can start it
that way.
Marc
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