topic Re: How to fence a RHEL5 cluster with HP DL585 Rilo ? in Operating System - Linux

How to fence a RHEL5 cluster with HP DL585 Rilo ?

Devesh Pant_1 — Sun, 14 Sep 2008 18:47:09 GMT

I have a working two node cluster with HP DL585 RHEL5 servers. Ehile shutting down any of the nodes it gets hung at
Stopping fencing ....

Also while coming up Starting fencing is a big delay.

I am not sure if we can live without fencing ?
even not very clear if the HP Rilo fencing works

Any help would be appreciated

thanks
DP

Re: How to fence a RHEL5 cluster with HP DL585 Rilo ?

Steven E. Protter — Mon, 15 Sep 2008 11:17:46 GMT

Shalom,

1) Set up ilo with password and ip address.
2) configure that with system-config-cluster going through normal fencing steps.

ilo devices control power to the system and therefore can be used to boot the system via a power reset. To avoid split brain syndrome, e.g. both modes trying to modify the same data at the same time fencing permits the cluster service to fence one node to avoid data corruption.

Without fencing your cluster is not reliable and can not deal with problems and maintain data integrity.

So no, you can not live without fencing.

SEP

Re: How to fence a RHEL5 cluster with HP DL585 Rilo ?

Ivan Ferreira — Mon, 15 Sep 2008 14:25:49 GMT

>>> even not very clear if the HP Rilo fencing works

Disconnect the interconnect cable to test.

Re: How to fence a RHEL5 cluster with HP DL585 Rilo ?

Devesh Pant_1 — Mon, 15 Sep 2008 14:34:27 GMT

Thanks SEp

Ivan,
I got the fencing working fine with the iLO

the best way to test is
/sbin/fence_ilo -a ilo_hostname -l ilo_username -p ilo_password -o off -v

I had to download and install perl-Crypt-SSLeay-0.56-1.el5.rf.x86_64.rpm
to get this to work.

thanks
DP

Re: How to fence a RHEL5 cluster with HP DL585 Rilo ?

freeman7107 — Sun, 23 Nov 2008 07:58:23 GMT

Hi:
I have the same problem,while stopping fencing,it takes a long time and then has an error "leaving cluster failed,device or resource busy".
Mine is HP DL580G5 with ilo2,i have a usrname password and ip address with ilo2.
Can anyone tell me how to config the fence and how to deal with the problem?
thanks a lot!
Freeman
My email:freeman_7107@163.com
If you have any files about it,send me please,thank you!