Nut upsuser - Nov 2022 - Shutdown variables

Per https://networkupstools.org/docs/user-manual.chunked/ar01s06.html  
6.3, am I right in thinking, for my single server running NUT (in  
standalone mode) with connected USB UPS:

- when battery.charge reaches battery.charge.low: ups.status triggers  
to "LB" and upsmon sets an FSD in motion
- upsmon waits FINALDELAY 5 seconds, and calls my shutdown command  
(which then in sequence does a clean shutdown of my VMs before calling  
the 'real' shutdown command)
- my server then shuts down and powers off

Main question:

"ups.delay.shutdown" - at what point does this variable kick in? Is  
ups.delay.shutdown the period in seconds after FSD that the UPS will  
hard-shutdown, i.e. I need to ensure that my server can complete clean  
shutdown in that duration?

And second question:

On a RedHat server as above, do I need to alter any system shutdown  
script to pick up on the killpower POWERDOWNFLAG, or will the  
ups.delay.shutdown just kick in at its expiry and turn it off anyway?

Thanks
Simon.

-- 
Simon Wilson
M: 0400 12 11 16

On Sun, 27 Nov 2022, Simon Wilson via Nut-upsuser wrote:
> Per https://networkupstools.org/docs/user-manual.chunked/ar01s06.html 6.3,
am
> I right in thinking, for my single server running NUT (in standalone mode) 
> with connected USB UPS:
>
> - when battery.charge reaches battery.charge.low: ups.status triggers to
"LB"
> and upsmon sets an FSD in motion
> - upsmon waits FINALDELAY 5 seconds, and calls my shutdown command (which 
> then in sequence does a clean shutdown of my VMs before calling the
'real'
> shutdown command)
> - my server then shuts down and powers off
>
> Main question:
>
> "ups.delay.shutdown" - at what point does this variable kick in?
Is
> ups.delay.shutdown the period in seconds after FSD that the UPS will 
> hard-shutdown, i.e. I need to ensure that my server can complete clean 
> shutdown in that duration?
Yes, you do need to give your server sufficient time.
My understanding is that the ups.delay.shutdown is overwritten by the offdelay 
option in file ups.conf.

In the machine with which I type this, I have

  rprice at titan ~ upsc Eaton ups.delay.shutdown
  20
  rprice at titan ~ grep offdelay /etc/nut/ups.conf
          offdelay = 30

See https://rogerprice.org/NUT/ConfigExamples.A5.pdf chapter 2.5, and chapter 
2.7 line 77.

Roger