[Linux-cluster] Add a fence device of type SUN ILOM

Quentin Arce Quentin.Arce at Sun.COM
Fri Aug 10 15:12:48 UTC 2007

jim parsons wrote:
> On Thu, 2007-08-09 at 14:13 -0400, Lanthier, Stéphanie wrote:
>> Dear list members,
>> I have in production a RHCS cluster composed of three RHEL4u5 nodes
>> that use GFS. Initially, I first put no fence device on the nodes. I
>> just defined a manual fence device without associating it to the
>> nodes. 
>> As the GFS file system is not accessible when I'm rebooting one of the
>> three nodes, I'm realizing the importance of fence devices.
>> I just defined manual fence devices for the three nodes, but I read
>> that manual fence device is not a good idea for production
>> environment.
> You need to run the fence_ack_manual script after fencing...it is really
> a pain, and DEF not anything to use for production.
>> My machines are SUN Fire X4100. I see that we can define a fence
>> device of type HP ILO. I would like to know if I can use the HP ILO
>> form in system-config-cluster tool to enter and use a SUN ILOM as
>> fence device?
> Know, please, that system-config-cluster is just a front-end editor for
> the /etc/cluster/cluster.conf file. It takes your fence form values and
> inserts the values in the proper format in the file and then calls the
> methods to update the cluster with the new file.
> I do not know the params needed for the SUN ILOM, but I doubt very much
> that the fence_ilo agent would do the correct thing. It would be easy to
> find out, though. Man fence_ilo and see the params needed, and then run
> the agent from the command line (/sbin/fence_ilo -a
> System.ILOM.To.Reboot.Now -l login -p passwd 
> ...and see what happens...I kind of doubt it will work :/
> How does ILOM work? telnet or ssh? Is there an snmp interface to ILOM?
> If so, there might be a way...by hacking on another agent.
So, I'm a lurker on this list as I no longer have a cluster up... but I 
work on ILOM and I would love to see this work.  This isn't official 
support, I'm a developer not a customer support person.  So, it's more 
on my time.  If there is anything I can do... Please let me know.  
Questions on this problem, regarding what ILOM can / can't do, how to 
check state of the server via ILOM, etc.


> Adding an agent is really not too big of a deal, if you are handy with
> scripting.
> -J
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