On 3/1/12 5:37 PM, William Seligman wrote:
> After days spent debugging a fencing issue with my cluster, I know for certain
> that this fencing agent works, at least for me. I'd like to contribute it to 
> the
> Linux HA community.
> 
> In my cluster, the fencing mechanism is to use NUT (Network UPS Tools;
> <http://www.networkupstools.org/> to turn off power to a node. About 1.5 years
> ago, I contributed a NUT-based fencing agent for Pacemaker 1.0:
> 
> <http://oss.clusterlabs.org/pipermail/pacemaker/2010-August/007347.html>
> 
> That script doesn't work for stonith-ng. So here's a new agent, written in 
> perl,
> and tested under pacemaker-1.1.6 and nut-2.4.3.
> 
> I know there's a fence_apc_snmp agent that already in resource-agents. 
> However,
> that agent only works with APC devices with multiple outlet control; it 
> displays
> an error messages when used with my UPSes. This script is for those who'd 
> rather
> use NUT than play with SNMP MIBs.

I've made some improvements to the NUT-based fencing agent I contributed before.
The changes are:

- A more rigorous approach to the error codes returned by the agent.

- Added options to delay the times between issuing a poweron/poweroff command
and verifying that the UPS responds.

The revised fence_nut agent is at <http://pastebin.com/sQdqWKQq>.

-- 
Bill Seligman             | Phone: (914) 591-2823
Nevis Labs, Columbia Univ | mailto://[email protected]
PO Box 137                |
Irvington NY 10533 USA    | http://www.nevis.columbia.edu/~seligman/

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