[Nut-upsuser] Multiple UPS monitoring, relaying

Peter Selinger selinger at mathstat.dal.ca
Fri Apr 20 13:38:41 UTC 2007

This is simple. On each machine that you potentially want to shut
down, you need to run upsmon, and put one (or more) MONITOR statements
into upsmon.conf telling the machine which UPS's it depends on. In
your example, on each server, you put:

 MONITOR ups1 at upsmon 1 monuser mypass master

and on each desktop:

 MONITOR ups2 at upsmon 1 monuser mypass master

Note that the name "upsmon" is a bad name for the machine that your
UPS's are attached to, since that machine's purpose is to run upsd and
drivers, not upsmon. The program upsmon runs on a machine that you
want to shut down, whereas the program upsd runs on a machine that
drives a UPS. In case they are the same, you run both sets of

See also: 
upsmon(8)  - the sections on "UPS definitions" and "power values"
docs/shutdown.txt  - particularly the section on "multiple UPS shutdowns"
http://www.networkupstools.org/features/ - the section on "monitoring diagrams"

-- Peter

Czuczy Gergely wrote:
> Hello,
> I've got a setup with NUT, where we've got two UPSes, 
> ups1 and ups2. UPS1 supports our servers, while UPS2
> supports our desktop boxes. We monitor both of them
> via USB on a box now called "upsmon".
> The interesting point comes here. We monitor both
> UPSes on the upsmon box, but if UPS2 fails, which
> supports our desktop boxes, NUT shouldn't initiate
> a shutdown in itself, or take any action on itself.
> It just should keep on monitoring and relaying the
> monitor information to the client boxes.
> So, the question is, how can I tell nut-upsmon,
> to not to initiate a shutdown according to UPS2,
> and even, don't take UPS2 into account when checking
> if a shutdown is needed, but only depend on UPS1?
> I saw that it has an option where the number of required
> UPSes to be online can be defined. But how can i specify
> which UPSes are needed to be online, and which ones are
> just being monitored(and the monitoring info relayed) on
> the current box?
> -- 
> Your sincerely
> Gergely Czuczy
> Publishing Factory Ltd
> http://www.publishing.hu/
> _______________________________________________
> Nut-upsuser mailing list
> Nut-upsuser at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser

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