[Linux-cluster] Re: Fencing test

Rajagopal Swaminathan raju.rajsand at gmail.com
Fri Jan 16 11:16:48 UTC 2009


On Thu, Jan 15, 2009 at 1:18 AM, Paras pradhan <pradhanparas at gmail.com> wrote:
>> On Fri, Jan 9, 2009 at 12:09 AM, Paras pradhan <pradhanparas at gmail.com> wrote:
>>> In an act to solve my fencing issue in my 2 node cluster, i tried to
>>> run fence_ipmi to check if fencing is working or not. I need to know
>>> what is my problem
>>> -
>>> [root at ha1lx ~]# fence_ipmilan -a -o off -l admin -p admin
> Yes as you said, I am able to power down node4 using node3, so it
> seems ipmi is working fine. But I dunno what is going on with my two
> node cluster. Can a red hat cluster operates fine in a two nodes mode?

Yes. I have configured few clusters on RHEL 4 and 5. They do work.

> Do i need qdisk or it is optional. Which area do i need to focus to
> run my 2 nodes red hat cluster using ipmi as fencing device.
But I have done it on HP, SUN and IBM servers. All of them have their
own technology like HP-ILO, SUN-ALOm etc.

I never had a chance on an IPMI.

BTW, This is a wild guess. I am just curious:

>              <clusternode name="" nodeid="2" votes="1">

Why nodeid here is 2

>                               <method name="1">
>                                      <device name="fence1"/>
>                               </method>
>               <fencedevice agent="fence_ipmilan" ipaddr="" login="admin"
> name="fence1" passwd="admin"/>


>               <clusternode name="" nodeid="1" votes="1">

here it is 1

>                               <method name="1">
>                                       <device name="fence2"/>
>                               </method>

>               <fencedevice agent="fence_ipmilan" ipaddr="" login="admin" name="fence2" passwd="admin"/>

<All the disclaimers ever invented apply>
HAve you tried exhanging the numbers? say the one with IP .27 to 1 and .29 to 2.
</All the disclaimers ever invented apply>

No warranties offered. Just a friendly suggestion....
Never try it on Production cluster.

Also we all will get a clearer picture if you use seperate switches
for heartbeat and data networks.


With warm regards


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