[Linux-cluster] Few queries about fence working

[emmanuel segura]

Can you show me your cluster config?

2012/1/25 jayesh.shinde <jayesh.shinde at netcore.co.in>

> **
> Hi  all ,
>
> I have few queries about fence working.
>
> I am using 2 different  the 2 node cluster with Dell and IBM hardware in
> two different IDC.
> Recently I came across the network failure problem at different time and I
> found my 2 nodes are power off state.
>
> Below is  how the situation happened with my 2 different 2 node cluster.
>
> With 2 node IBM  node cluster with SAN :--
> ==============================
> 1)  Network connectivity  was failed totally for few minutes.
> 2) And as per the /var/log/messages both servers failed to  fence to each
> other and both server was UP as it is with all services.
> 3) But the "clustat" was showing serves are not in cluster mode and
> "regmanger" status was stop.
> 4) I simply reboot the server.
> 5) After that I found both server in power off stat.
>
>
> with another  2 node Dell server with DRBD  :--
> =================================
> 1) Network connectivity  was failed totally.
> 2) DRAC ip was unavailable so fence failed from both server.
> 3) after some time I fond the servers are shutdown.
>
> In normal conditions both cluster work properly
>
>  my queries are now :--
>  ===============
> 1) What could be the reason for power off ?
> 2) Does cluster's fencing method  caused for the power off  of server (
> i.e because of previous failed fence ) ?
> 3) Is there any test cases mentioned on net / blog / wiki  about the fence
> , i.e different situation under which  fence works.
>
> Please guide.
>
> Thanks & Regards
> Jayesh Shinde
>
>
>
>
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>



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