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Re: [Linux-cluster] porblem with quorum at cluster boot



The configuration you are trying to build, 2 cluster nodes (1 vote each) plus a quorum disk 1 vote (making a total expected votes= 3) must remain up if you loose 1 of the members (as long as the remaining node still accesses the quorum disk) because there are still 2   active votes (1 remaining node + 1 quorum disk) = 2 > expected_votes/2.
 
The Quorum (majority) must be greater (absolutely greater  >) than expected_votes/2 (51% or greater) in order to service to continue. 
 
 
2010/9/27 Bennie R Thomas <Bennie_R_Thomas raytheon com>
Try setting your expected votes to 2 or 1..  

Your Cluster is hanging with one node because it want's 3 votes.



From: Brem Belguebli <brem belguebli gmail com>
To: linux clustering <linux-cluster redhat com>
Date: 09/25/2010 10:30 AM
Subject: Re: [Linux-cluster] porblem with quorum at cluster boot
Sent by: linux-cluster-bounces redhat com





On Fri, 2010-09-24 at 12:52 -0400, Jason_Henderson Mitel com wrote:
>
> I think you still need two_node="1" in your conf file if you want a
> single node to become quorate.
>
two_nodes=1 is only valid if you do not have a quorum disk.

> linux-cluster-bounces redhat com wrote on 09/24/2010 12:38:17 PM:
>
> > hello,
> >
> > I have a 2 node cluster with qdisk quorum partition;
> >
> > each node has 1 vote and the qdisk has 1 vote too; in cluster.conf
> I
> > have this explicit declaration:
> > <cman expected_votes="3" two_node="0"\>
> >
> > when I have both 2 nodes active cman_tool status tell me this:
> >
> > Version: 6.1.0
> > Nodes: 2
> > Expected votes: 3
> > Quorum device votes: 1
> > Total votes: 3
> > Node votes: 1
> > Quorum: 2
> >
> > then, if I power off a node these value, as expected, changed this
> way:
> > Nodes: 1
> > Total votes: 2
> >
> > and the cluster is still quorate and functional.
> >
> > the problem is if I power off both the node and them power on only
> one
> > of them: in this case the single node does not quorate and the
> cluster
> > does not start: I have to power on both the node to have the
> cluster
> > (and services on the cluster) working.
> >
> > I'd like the cluster can work (and boot) even with a single node
> (ie, if
> > one of the node has hw failure and is down I still want to be able
> to
> > reboot the working node and have it booting correctly the cluster)
> >
> > any hints? (thank's for reading all this)
> >
> > --
> > bye,
> > emilio
> >
> > --
> > Linux-cluster mailing list
> > Linux-cluster redhat com
> >
https://www.redhat.com/mailman/listinfo/linux-cluster
> --
> Linux-cluster mailing list
> Linux-cluster redhat com
>
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