[CentOS] Centos & UPS

Craig White craigwhite at azapple.com
Sat Dec 26 22:31:42 UTC 2009

On Sat, 2009-12-26 at 14:26 -0800, Keith Keller wrote:
> On Sat, Dec 26, 2009 at 10:59:58AM -0500, Robert Spangler wrote:
> > 
> > I received for X-mas an APC UPS system form my computer.  I'm looking for how 
> > I can integrate it into the system so that the system will shut down either 
> > after the UPS power is low enough or a timed event after the power is out 
> > will automatically shutdown.  Would also like it to be smart enough to stop 
> > the shut down process if power is restored before the shutdown starts.
> I use both apcupsd and NUT (networkupstools.org) for this purpose.  I
> think NUT is the more complicated product, but it also works in a
> multiserver environment (though I never made it that far in my
> configuration).  In any case, the NUT documentation has good suggestions
> for how to test your configuration, which I used (generically) even when
> testing apcupsd.
> I currently use apcupsd in a single-machine environment, and have it
> configured to shut down on low battery.  I tested almost all the
> scenarios described in the NUT docs, and apcupsd performed fine in all
> of them.  (One thing I didn't test was whether it restored power
> gracefully if line power was restored after shutdown had already began;
> if you are concerned about availability you should do this test in
> addition to the more obvious ones.)
apcupsd is both a server and client software so if you have multiple
systems plugged into a single APC UPS device, you can set the system
with the USB/serial cable up as server and other systems as clients.


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