[Linux-cluster] Re: Fencing test

[Paras pradhan]

Hi,

Was busy on some other stuffs.

On Fri, Jan 16, 2009 at 5:16 AM, Rajagopal Swaminathan
<raju.rajsand at gmail.com> wrote:
> Greetings,
>
> 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 10.42.21.28 -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="10.42.21.27" nodeid="2" votes="1">
>
> Why nodeid here is 2
>
>>                               <method name="1">
>>                                      <device name="fence1"/>
>>                               </method>
>>
>>               <fencedevice agent="fence_ipmilan" ipaddr="10.42.21.28" login="admin"
>> name="fence1" passwd="admin"/>
>
> and
>
>>               <clusternode name="10.42.21.29" nodeid="1" votes="1">
>
> here it is 1

Changing node ids did not solve my problem.


>
>
>>                               <method name="1">
>>                                       <device name="fence2"/>
>>                               </method>
>
>>               <fencedevice agent="fence_ipmilan" ipaddr="10.42.21.30" 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.
>
> HTH
>
> With warm regards
>
> Rajagopal
>
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>


I will try qdisk in my 2 node cluster and post here how it goes.

Thanks
Paras.