UPS

Shutdown Hosts on Power Outages

Everybody is talking about Power Outages. Let’s assume you have a Smart-UPS for your Playground and you’d like to shut some Infrastructure to avoid some troubles with corrupt filesystems, broken vm’s and things like that.

Connection UPS to APU via USB Cable

dmesg show the UPS connected

APU# dmesg
uhidev0 at uhub0 port 3 configuration 1 interface 0 "American Power Conversion Smart-UPS_1500 ...
uhidev0: iclass 3/0, 142 report ids
upd0 at uhidev0
uhid0 at uhidev0 reportid 1: input=0, output=0, feature=1
uhid1 at uhidev0 reportid 2: input=0, output=0, feature=1
...
uhid21 at uhidev0 reportid 142: input=0, output=0, feature=4

Check sysctl

what kind of information do we get from the hardware sensor ?