Example Network UPS Tool (NUT) configs

gmail.py

#!/usr/bin/python
import os
import sys
import smtplib
import mimetypes
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.MIMEAudio import MIMEAudio
from email.MIMEImage import MIMEImage
from email.Encoders import encode_base64
def sendMail(subject, text):
  gmailUser = 'sender@example.com'
  gmailPassword = 'pa55Word'
  recipient = 'recipient@example.org'
  msg = MIMEMultipart()
  msg['From'] = gmailUser
  msg['To'] = recipient
  msg['Subject'] = subject
  msg.attach(MIMEText(text))
  mailServer = smtplib.SMTP('smtp.gmail.com', 587)
  mailServer.ehlo()
  mailServer.starttls()
  mailServer.ehlo()
  mailServer.login(gmailUser, gmailPassword)
  mailServer.sendmail(gmailUser, recipient, msg.as_string())
  mailServer.close()
  print'Sent email to %s' % recipient

sendMail(sys.argv[1], sys.argv[2])

hosts.conf

MONITOR PowerWalker2200@localhost "Garage UPS"

nut.conf

MODE=netserver

ups.conf

[PowerWalker2200]
        driver = blazer_usb
        port = auto

upsd.conf

LISTEN 0.0.0.0

upsd.users

[ups_admin]
password = pa55Word
upsmon master

upsmon.conf

MONITOR PowerWalker2200@_server_IP_ 1 ups_admin pa55Word master
MINSUPPLIES 1
SHUTDOWNCMD "/sbin/shutdown -h +0"
NOTIFYCMD /sbin/upssched
POLLFREQ 5
POLLFREQALERT 5
HOSTSYNC 15
DEADTIME 15
POWERDOWNFLAG /etc/killpower
NOTIFYFLAG ONLINE       SYSLOG+WALL+EXEC
NOTIFYFLAG ONBATT       SYSLOG+WALL+EXEC
RBWARNTIME 43200
NOCOMMWARNTIME 300
FINALDELAY 5

upssched-cmd

case $1 in
        ups-on-batt)
                gmail.py "Garage has lost power" "Running on battery"
                ;;
        onbattwarn)
                gmail.py "Garage power still down after 30s" "Running on battery"
                ;;
        ups-back-on-power)
                gmail.py "Garage power restored" "Running on mains again"
                ;;
        *)
                logger -t upssched-cmd "Unrecognized command: $1"
                ;;
esac

upssched.conf

CMDSCRIPT /bin/upssched-cmd
PIPEFN /var/run/nut/upssched/upssched.pipe
LOCKFN /var/run/nut/upssched/upssched.lock
AT ONBATT * EXECUTE ups-on-batt
AT ONBATT * START-TIMER onbattwarn 30
AT ONLINE * CANCEL-TIMER onbattwarn
AT ONLINE * EXECUTE ups-back-on-power

To use in anger:

Replace instances of pa55Word with a real password of your choosing.

Put the actual IP of your server running NUT into _server_IP_ in upsmon.conf

Substitute these lines in gmail.py with real values for the account you're using to send and the address you want to get alerts from.

gmailUser = 'sender@example.com'
gmailPassword = 'pa55Word'
recipient = 'recipient@example.org'

Also note that you'll have to jump through some hoops with the sending gmail account to allow it to be used this way (as gmail has tightened up security defaults).