On Mon, 26 Aug 2019 17:59:30 -0700 (PDT), wrote:

On Monday, 26 August 2019 13:25:36 UTC+1, Roger Hayter wrote:

I think anything that can run apcupsd can be networked easily to the box
controlling the UPS. Remakably painless. It's only worth using NUT
(which can allegedly follow an apcupsd server) if there's something like
a NAS you can't install apcupsd on. NUT is less painless.

sounds like a pain in the ....

So how would you do it, assuming you understood why it might be a
'good idea' to have say 3 machines (but only) on one UPS?

Machine one plugs into the UPS monitoring port and becomes the APCUPSD
'server'. The other two machines also run APCUPSD but are clients to
the server.

If the power fails the APCUPSD 'server' detects the failure and
changes it's status from Mains good to Mains off (or some such) and
the client machines also see this over the LAN and react as set (by
you).

On mine the two client machines shut down within a couple of minutes
(or sooner if the Server indicated the battery was already very low)
and the Server shut down when the battery was less than 50% remaining
capacity.

I'd have to say it worked well and was very reliable.

It also meant that you could minimise the 'cost' of having the
background load of the UPS, and the UPS itself, over 3 (or more,
depending on the draw) machines.

Cheers, T i m