First up, give this section a read. It will explain what fencing does and why you're seeing what you are;

https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial#Concept.3B_Fencing

As for being virtualbox guests, you're in a bit of a spot as there doesn't seem to be a native agent. Google shows this though;

https://forums.virtualbox.org/viewtopic.php?f=7&t=35372

If you can switch to KVM or Xen, then you can use the fence_virsh or fence_xvm agents.

cheers

On 10/01/2012 12:53 AM, hitesh nayyar wrote:
Hello,

I am not aware of fencing.Yes you are correct i have not configured
anything related to fencing.

Can you please let me know as how can i proceed...Do i have to purchase
some sort of hardware?

How can i implement Power Fencing?

I am using virtual box machines on my desktop in which linux are
installed and have been connected through swtich.


[root@hitesh12 ~]# cat /etc/cluster/cluster.conf
<?xml version="1.0"?>
<cluster config_version="1" name="dhoni">
         <clusternodes>
                 <clusternode name="hitesh12" nodeid="1"/>
                 <clusternode name="saanvi12" nodeid="2"/>
         </clusternodes>
         <cman expected_votes="1" two_node="1"/>
         <fencedevices/>
         <rm/>
</cluster>






On Mon, Oct 1, 2012 at 9:13 AM, Rajagopal Swaminathan
<raju.rajs...@gmail.com <mailto:raju.rajs...@gmail.com>> wrote:

    Greetings,

    On Mon, Oct 1, 2012 at 8:46 AM, hitesh nayyar
    <hitesh1907nay...@gmail.com <mailto:hitesh1907nay...@gmail.com>> wrote:
     >
     > I have 2 Linux desktop and have following ip's and name:
     >

     >From what I can gather, This seems to be a desktop class machines.
    Hence they may not have IPMI/ILO etc.

    I am 99.99% certain that fencing has not been configured.

    I also doubt if it has external storage.

    (I can identify as I tried my experiments with clusters first time
    with such desktop class machines)

    The only solution for this is Power Fencing.

    --
    Regards,

    Rajagopal

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