Trying to shut down xcp-ng hypervisors using nutserver attached to UPS's

1

I’m having difficulty in figuring out how to shut down 3 xcp-ng hypervisors gracefully using a nutserver attached to 5 UPS’s.
What I want to do is once the UPS’s reach a certain level of charge, I want to automatically shutdown the hypervisors, but problem is it looks like you need a nut client installed on each xcp-ng machine to monitor the UPS levels and a script on each to shutdown the machines, trouble is I can’t see a way of installing anything on the xcp-ng machines. Some assistance on the matter would be greatly appreciated. Thanks.

2

I don’t have any guide on NUT, but Techno Tim does here Network UPS Tools (NUT Server) Ultimate Guide - YouTube

Instead of installing an agent you could create a script that logs in and sends the shutdown command to the servers.

3

I’ve looked all day and can only find client server setups for nutserver and even then the examples are patchy. Do you have an example script that can sample the UPS/nutserver info and automatically shutdown remote servers without them containing clients. I’ve watched techno tims video and he only shows this client server setup, with a client on every machine you want to shutdown. Also I want it to shutdown at a specific battery level 20 % or so, he only shows shutdown on a timer when the power is removed.

4

I have not done this, so only a suggestion, but have you tried this:

At the base these are just Centos 7 computers, so most things that work on 7 should be OK on XCP-NG.