A while ago I ranted about the
installation of APC's Powerchute Network Shutdown for Linux. While I got it working, the 60Mb+ of memory footprint used by the Java VM always seemed ridiculous to me, specially for a daemon that doesn't do much more than wait for a shutdown command.
Today I needed those 67Mb of RAM because the kernel on an old-timer began oomkill'ing my processes. A quick search yielded NUT, that works just fine with the Network Management card of Smart-UPS 3000, using the SNMP module.
Here's what I did on the Debian machine.
1. Install packages nut and nut-snmp
# aptitude install nut nut-snmp
2. Create /etc/nut/ups.conf:
[apc1]
driver = snmp-ups
mibs=apcc
community=public
port = apc1.mydomain
desc = "APC1 UPS Network Management Card"
Notice that "port" is the hostname or IP of your APC network card.
3. Start the UPS driver to see if it is working:
# upsdrvctl start
Network UPS Tools - UPS driver controller 2.0.4
Network UPS Tools - Multi-MIBS SNMP UPS driver 0.41 (2.0.4)
Warning: This is an experimental driver.
Some features may not function correctly.
detected Smart-UPS 3000 RM on host apc1.mydomain
4. Create an empty upsd.users file for now:
echo "" > /etc/nut/upsd.users
5. Create upsd.conf:
ACL all 0.0.0.0/0
ACL localhost 127.0.0.1/32
ACCEPT localhost
REJECT all
6. Start the server:
# upsd
Network UPS Tools upsd 1.5.12
Connected to UPS [apc1]: snmp-ups-apc1.mydomain
Synchronizing...done
7. Run the upsc utility to test the daemon:
# upsc apc1@localhost ups.status
TRIM # OBS: Should have been "OL" but it seems Energy Australia wasn't cooperating.
# upsc apc1@localhost
battery.charge: 100.0
battery.charge.low: 120
battery.charge.restart: 30
battery.runtime: 840.0
driver.name: snmp-ups
driver.parameter.mibs: apcc
driver.parameter.port: apc1.q-free.com.au
driver.version: 2.0.4
driver.version.internal: 0.41
input.frequency: 050.0
input.sensitivity: 4
input.transfer.high: 253
input.transfer.low: 208
input.voltage: 250.0
output.current: 000.0
output.voltage: 221.0
output.voltage.target.battery: 230
ups.delay.shutdown: 180
ups.delay.start: 0
ups.firmware: 666.6.I
ups.load: 042.0
ups.mfr: APC
ups.mfr.date: 09/26/06
ups.model: Smart-UPS 3000 RM
ups.serial: JS0640013695
ups.status: TRIM
ups.temperature: 025.0
ups.test.result: 1
8. At this point it seems that all is working fine. Edit the upsd.users file:
[monuser]
password = mypass
allowfrom = localhost
upsmon master
9. Edit your upsmon.conf file and remember to set a MONITOR line:
(...)
MONITOR apc1@localhost 1 monuser mypass master
(...)
Check the examples for the other configuration directives.
10. Restart using the init script to make sure:
# /etc/init.d/ups-monitor restart
Restarting Network UPS Tools: upsdrvctl upsdrvctl upsd upsmon.
Check that the processes are running:
# ps auwx | grep ups
nut 22030 0.0 3.6 4540 2260 ? Ss 16:19 0:00 /lib/nut/snmp-ups -a apc1
nut 22032 0.0 1.1 1732 728 ? Ss 16:19 0:00 /sbin/upsd
root 22034 0.0 1.1 1724 680 ? Ss 16:19 0:00 /sbin/upsmon
nut 22035 0.0 1.2 1724 736 ? S 16:19 0:00 /sbin/upsmon
Have a look at the log files; they should look similar to:
# tail /var/log/syslog
Jun 13 15:52:08 localhost snmp-ups[22030]: Startup successful
Jun 13 15:52:08 localhost upsd[22031]: Connected to UPS [apc1]: snmp-ups-apc1.mydomain
Jun 13 15:52:08 localhost upsd[22032]: Startup successful
Jun 13 15:52:08 localhost upsmon[22034]: Startup successful
Jun 13 15:52:08 localhost upsd[22032]: Connection from 127.0.0.1
Jun 13 15:52:08 localhost upsd[22032]: Client monuser@127.0.0.1 logged into UPS [apc1]
If that didn't work, have a look at your /etc/default/nut file - make sure the "START_" variables are set to yes.
I managed to get it running using NUT's
install instructions. These are the basic things to get it running; I recommend reading the rest of the
documentation to finish your set-up.
