This is a simple way of setting up the NUT ups monitoring system to shut servers down well before you get to powerfail status. If you lose power for more than about 5 seconds, chances are pretty good you're going to have lost it for a while, so you may as well shut things down now
It will, on the first ONBATT signal from the UPS, start a 30 second timer. If the power does not return during this time it will schedule a 2 minute shutdown, after which the box is shutdown cleanly. If power returns at all during this time, the shutdown will be cancelled. -- 
DanielLawson
/etc/nut/ups.conf
[mge] ## USB cable #driver = newhidups #port = auto ## SNTMP #driver = snmp-ups #port = 1.2.3.4 #mibs = mge desc = "MGE UPS"
/etc/nut/upsd.conf
ACL all 0.0.0.0/0 ACL localhost 127.0.0.1/32 ACCEPT localhost REJECT all
/etc/nut/upsd.users
# Supervision user
[admin]
password = password
allowfrom = localhost
actions = SET
instcmds = ALL
# Protection user
[monuser]
password = monitor
allowfrom = localhost
upsmon master
/etc/nut/upsmon.conf
MONITOR mge@localhost 1 monuser monitor master MINSUPPLIES 1 SHUTDOWNCMD "/sbin/shutdown -h +0" POLLFREQ 5 POLLFREQALERT 5 HOSTSYNC 15 DEADTIME 15 #POWERDOWNFLAG /etc/killpower RBWARNTIME 43200 NOCOMMWARNTIME 300 FINALDELAY 5 NOTIFYCMD /sbin/upssched NOTIFYFLAG ONBATT WALL+SYSLOG+EXEC NOTIFYFLAG ONLINE WALL+SYSLOG+EXEC NOTIFYFLAG LOWBATT WALL+SYSLOG+EXEC NOTIFYFLAG FSD WALL+SYSLOG+EXEC
/etc/nut/upssched.conf
CMDSCRIPT /usr/local/bin/upssched-cmd PIPEFN /var/run/upssched/upssched.pipe LOCKFN /var/run/upssched/upssched.lock AT ONBATT * START-TIMER early-shutdown 30 AT LOWBATT * START-TIMER early-shutdown 30 AT ONLINE * CANCEL-TIMER resume AT ONLINE * EXECUTE resume AT FSD * EXECUTE forced-shutdown
/usr/local/bin/upssched-cmd
#!/bin/bash
# time in minutes
time=2
case "${1}" in
early-shutdown)
logger -t upssched-cmd "Early Shutdown"
shutdown -h +$time powerevent
;;
resume)
logger -t upssched-cmd "Resume"
[ -f /var/run/shutdown.pid ] && shutdown -c || exit 0
;;
forced-shutdown)
logger -t upssched-cmd "Forced Shutdown"
shutdown -h +$time powerevent-forced
;;
*)
logger -t upssched-cmd "Unknown command: ${1}"
;;
esac
---
Part of CategorySystemAdministration
