[Nut-upsuser] ordered shutdown

[Arjen de Korte]

Citeren Marco Chiappero <marco op absence.it>:

>> Please elaborate here, because as far as I know we already have this
>> (the 'upsd' server).
> Please read the last mail from Gabor, his idea it's really close to
> mine. To me clients have to be as "stupid" as possible (requiring almost
> no configuration) and simply obey to commands issued by the server. This
> means that clients shutdown configuration has to be done on the machine
> controlling the UPS(es). This way it is the server (connected to the
> UPS) that allows someone to use the UPS it owns for the time it
> considers fine, it is not a client that tells the server how much it
> wants to stay up (a slave upsmon works this way, right?).

If you run the upsmon master on the same box as the upsd server, all  
upsmon slaves connected to the same UPS will shutdown at the same time  
as the upsmon master. So effectively, you already have a centralized  
setup if you configure things properly. There is absolutely no need to  
run 'upssched' on every client if they should all go down at the same  
time, just run it on the master and you'll be fine. The only thing  
that remains is that we need different 'virtual' UPSes that can be  
shutdown at different battery.(charge|runtime) levels and you have  
pretty much exactly what Gabor describes.

Best regards, Arjen
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