NUT - Network UPS Tools

Using Network UPS Tools for Controlled Shutdowns

I’ve used apcupsd quite a lot, and intended to use it to protect our qnap, but but the default on qnap is to use a system called NUT. The two are quite similar so the transition wasn’t too hard; the main problem was trying to remember I wasn’t running apcupsd.

QNAP configuration

The package was already installed on the qnap, so all there was to do was plug in the UPS (an APC Back-UPS 550G and navigate to the config section `Control Panel -> External Device-> UPS.

  1. USB Connection
  2. Turn off the server after AC Power fails for minute(s): 2
  3. Enable network UPS master * notify in the event of a power failure
    1. 10.128.128.35

The model number and battery capacity should appear in the section at the bottom of this page.

Slave Setup

nut exists as a pacakge in debian so install it, then here are the non-empty configuration lines

  $ apt-get install nut nut-client
  $ cd /etc/nut
  $ sed '/^#/d' upsmon.conf | sed '/^$/d'
  MONITOR qnapups@10.128.128.40 1 admin <PASSWORD GOES HERE> slave
  MINSUPPLIES 1
  SHUTDOWNCMD "/sbin/shutdown -h +0"
  POLLFREQ 5
  POLLFREQALERT 5
  HOSTSYNC 15
  DEADTIME 15
  POWERDOWNFLAG /etc/killpower
  RBWARNTIME 43200
  NOCOMMWARNTIME 300
  FINALDELAY 5

  $ systemctl restart nut-monitor

I think that should be it, you can check communication with the qnap via upsc

  $ upsc qnapups@10.128.128.40
  Init SSL without certificate database
  battery.charge: 100
  battery.charge.low: 10
  battery.charge.warning: 50
  battery.date: not set
  battery.mfr.date: 2014/09/24
  battery.runtime: 1244
  battery.runtime.low: 120
  battery.type: PbAc
  battery.voltage: 13.5
  battery.voltage.nominal: 12.0
  device.mfr: APC
  device.model: Back-UPS ES 550G
  device.serial: 4B1439P30395  
  device.type: ups
  driver.name: usbhid-ups
  driver.parameter.pollfreq: 30
  driver.parameter.pollinterval: 2
  driver.parameter.port: /dev/ttyS1
  driver.parameter.synchronous: no
  driver.version: 2.7.4
  driver.version.data: APC HID 0.96
  driver.version.internal: 0.41
  input.sensitivity: high
  input.transfer.high: 139
  input.transfer.low: 92
  input.voltage: 121.0
  input.voltage.nominal: 120
  ups.beeper.status: enabled
  ups.delay.shutdown: 20
  ups.firmware: 904.W1 .D
  ups.firmware.aux: W1 
  ups.load: 30
  ups.mfr: APC
  ups.mfr.date: 2014/09/24
  ups.model: Back-UPS ES 550G
  ups.productid: 0002
  ups.serial: 4B1439P30395  
  ups.status: OL
  ups.timer.reboot: 0
  ups.timer.shutdown: -1
  ups.vendorid: 051d