Uninterruptable Power Supply

Introduction

The primary goal of the Network UPS Tools (NUT) project is to provide reliable monitoring of UPS hardware and ensure safe shutdowns of the systems which are connected.

The default configuration of NUT, will keep your connected systems operational until a critical battery state is reached (ie battery is nearing exhaustion) and then power down your server/equipment in a controlled fashion. See http://www.networkupstools.org/

Default Configuration (USB)

Most USB connected UPS's will work with the default settings. If using a USB connection just enable nut as follows:

config setprop nut status enabled
signal-event post-upgrade
signal-event reboot

If your USB UPS does not work properly OR you have a serial device then follow the Configuration Options below.

Configuration Options

Not all UPS's are supported by USB or the newhidups driver. However NUT supports many UPS's and can be configured under SME Server easily.

Serial Connection

1. Find the configuration details for your model of UPS. Refer to: http://www.networkupstools.org/compat/stable.html and make note of the driver name and upstype number (if any) in the third column.

   	Warning:
   	Always use the serial cable supplied with the UPS. Standard serial cables won't work with a serial UPS and have been known to cause damage to the UPS. Pay particular attention to any references to cable in in the UPS Model column.

   
   
2. From the consol issue the following commands: config setprop nut Model <model> config setprop nut Device <device> config setprop nut Type <type> config setprop nut status enabled Where:
   <model> and <type> are the driver name and type number found above.
   <device> is the serial port that the UPS is connected to eg. /dev/ttyS0. It also possible to use a more readable symlink. See HowTo on udev - symlinks for details. Note: The case of Model, Device and Type.
3. Check: config show nut
4. Apply changes and restart server: signal-event post-upgrade signal-event reboot Alternatively, without NUT running or requiring a server reboot: expand-template /etc/sysconfig/ups expand-template /etc/ups/* /etc/rc7.d/S38nut start
5. Confirm server is communicating with UPS: upsc UPS@localhost Whenever a UPS event occurs Emails are sent to the admin account.

Configuring as a slave

Set configuration values:

config setprop nut SlaveUPS UPS@192.168.33.11
config setprop nut Master no

Where 192.168.33.11 is your UPS master, that is the computer that is in direct communication with the UPS. The hostname of that computer may also work.

Apply changes and restart server:

signal-event post-upgrade
signal-event reboot 

Confirm server is communicating with master:

upsc UPS@192.168.33.11

Conecting multiple UPS's

To be added http://bugs.contribs.org/show_bug.cgi?id=629

Aditional Information

There are template fragments in /etc/e-smith/templates/etc/ups that control the config files located in /etc/ups. The default settings should be OK for most situations.

For information on configuration parameters:

man ups.conf
man upsd.conf
man upsd.users
man upsmon.conf
man upssched.conf

For general information:

man upsd
man nutupsdrv

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