8
How do I gracefully shutdown my server when ac power is off when UPS doesn't send shutdown signal (mander.xyz)
submitted 1 year ago by to c/techsupport@sopuli.xyz
5 comments fedilink hide all child comments
 

Edit: I'll probably use the wifi connection as an indication of power outage:)

I got a UPS that apparenlty doesnt send a shutdown signal when power goes off from the mains. What could I do to let the server know ac power is off and gracefully shut down?

My ups: Powertech ​UPS 1150VA​ Line Inte​ractive PT​-1150LI https://www.skroutz.gr/s/23613693/Powertech-UPS-Line-Interactive-1150VA-690W-me-2-Schuko-Prizes.html

I'm thinking of somehow having a device sending an "on" signal when connected to the mains that when it is interrupted (like, gone for X amount of time) the server shuts down. Then also set my server to attempt to boot up automatically every half an hour.

you are viewing a single comment's thread
view the rest of the comments
[–] 2 points 1 year ago (1 child)

If you have the machine turn on when AC is restored the UPS battery will still not have recharged, and if you have a second power cut or another glitch (not unlikely if it's an intermittent fault upstream of you) the UPS will not be able to supply power, so your server will suddenly lose power.

UPSs for computers usually delay restoring power to their load until their battery is recharged at least a certain amount. It doesn't look like yours has a control for that, but if it does you might be OK, otherwise you'll want to make the delay happen some other way. You could connect a Pi directly into your server's ethernet port with a cross over cable and do WoL through that.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •
  • [–] [S] 1 point 1 year ago

    A pi and a wifi extender with ethernet output (I think I have the latter) would probably complete this setup, but hmm Im already over budget and too bored to buy and set up a pi right now. Maybe I'll do it that way in the future.

    At least where the server is rarely ever there power outages, let alone concurent power outages.

  • permalink
  • fedilink
  • source
  • parent