R: [Linux-cluster] Cluster Centos - Don't switch resource

[Grisha G.]

with a 2 node cluster you may have a "split brain" problem (it then there is
no communication between the nodes so each node try's to fence the other) in
your case the problem may be different and there is no fencing at all.
The quorum disk/partition solves that problem.
After you set the fencing for your nodes (make sure the fencing works)
create a quorum partiotion its easy  (Google it ) in your cluster.conf
you'll need to change

<cman expected_votes="1" two_node="1"/> to
<cman expected_votes="3" two_node="0"/>

See if this helps you.

2008/9/22 mulach <mulach at libero.it>

>  I changed recovery="restart" to  relocate, but don't work. I understood
> what means Try using quorum partition to solve this problem
>
>
>
>
>  ------------------------------
>
> *Da:* linux-cluster-bounces at redhat.com [mailto:
> linux-cluster-bounces at redhat.com] *Per conto di *Grisha G.
> *Inviato:* lunedì 22 settembre 2008 11.43
> *A:* linux clustering
> *Oggetto:* Re: [Linux-cluster] Cluster Centos - Don't switch resource
>
>
>
>
> Try changing   recovery="restart" to  relocate if that wont work, check if
> your fencing works properly
> If your node don't get fenced the other node will not take the service from
> the failed node.
> Try using quorum partition to solve this problem
>
> Grisha
>
> On Mon, Sep 22, 2008 at 10:07 AM, Alex <linux at vfemail.net> wrote:
>
> Take a look here, for a working example. It worked for me:
>
> http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/en-US/RHEL510/Cluster_Administration/ap-httpd-service-CA.html
>
> Regards,
> Alx
>
>
> On Monday 22 September 2008 09:56, mulach at libero.it wrote:
> > Hi,
> >
> > in Centos 5.2 i had create a cluster with Conga(two node has been in
> vmware
> > server). The problem is that when a node fail, don't switch the service.
> > Below the cluster.conf
> >
> > --------------------------------
> > <?xml version="1.0"?>
> > <cluster alias="SecondCluster" config_version="23" name="SecondCluster">
> >  <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
> >  <clusternodes>
> >   <clusternode name="clu1.localdomain" nodeid="1" votes="1">
> >    <fence>
> >     <method name="1"/>
> >    </fence>
> >   </clusternode>
> >   <clusternode name="clu2.localdomain" nodeid="2" votes="1">
> >    <fence>
> >     <method name="1"/>
> >    </fence>
> >   </clusternode>
> >  </clusternodes>
> >  <cman expected_votes="1" two_node="1"/>
> >  <fencedevices/>
> >  <rm>
> >   <failoverdomains>
> >    <failoverdomain name="fail" ordered="1" restricted="1">
> >     <failoverdomainnode name="clu1.localdomain" priority="1"/>
> >     <failoverdomainnode name="clu2.localdomain" priority="2"/>
> >    </failoverdomain>
> >   </failoverdomains>
> >   <resources>
> >    <ip address="192.168.80.201" monitor_link="1"/>
> >    <fs device="/dev/sdb1" force_fsck="0" force_unmount="0" fsid="45662"
> > fstype="ext3" mountpoint="/mnt/sdc" name="Share" options=""
> > self_fence="0"/> </resources>
> >   <service autostart="1" domain="fail" exclusive="1" name="IPS"
> > recovery="restart"> <ip ref="192.168.80.201"/>
> >    <fs ref="Share"/>
> >   </service>
> >  </rm>
> >  <fence_xvmd/>
> > </cluster>
> >
> > --------------------------------
> >
> >
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