[Nut-upsuser] how do you test (nagios) that upsmon is connected?

[Spike]

Dear all,

I got nut going on one machine as standalone and on another 2 as
master/slave and would like to add some checks to nagios to make sure that
things are in order.

Most of the checks I've seen out there use upsc to check the ups. This is a
step forward compared to no monitoring, however as far as I can tell it
doesn't really address what I think is a critical point: upsmon is actually
monitoring the ups [and will shut down the box if needed].

I looked at the upsd and upsmon man pages, but can't see anything like a
"status" command that will show me if the connection is healthy (I noticed
that when I restart the daemons I get a log line saying "Communications
with UPS eaton5s at 127.0.0.1 established", but I can't seem to find a place
to access that). I could in theory check if the port is in use/ESTABLISHED,
lsof -i:3493, but it's not great.

Is there any command I can run that will confirm if upsmon is correctly
connected?

thanks,

Spike
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