Network UPS Tools User Manual
Network UPS Tools User Manual
Network UPS Tools User Manual
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<strong>Network</strong> <strong>UPS</strong> <strong>Tools</strong> <strong>User</strong> <strong>Manual</strong> 32 / 84<br />
7.1 The simple approach, using your own script<br />
7.1.1 How it works relative to upsmon<br />
Your command will be called with the full text of the message as one argument.<br />
For the default values, refer to the sample upsmon.conf file.<br />
The environment string NOTIFYTYPE will contain the type string of whatever caused this event to happen - ONLINE, ONBATT,<br />
LOWBATT, . . .<br />
Making this some sort of shell script might be a good idea, but the helper can be in any programming or scripting language.<br />
Note<br />
Remember that your helper must be executable. If you are using a script, make sure the execution flags are set.<br />
For more information, refer to upsmon(8) and upsmon.conf(5) manual pages.<br />
7.1.2 Setting up everything<br />
• Set EXEC flags on various things in upsmon.conf(5):<br />
NOTIFYFLAG ONBATT EXEC<br />
NOTIFYFLAG ONLINE EXEC<br />
If you want other things like WALL or SYSLOG to happen, just add them:<br />
NOTIFYFLAG ONBATT EXEC+WALL+SYSLOG<br />
You get the idea.<br />
• Tell upsmon where your script is<br />
NOTIFYCMD /path/to/my/script<br />
• Make a simple script like this at that location:<br />
#! /bin/bash<br />
echo "$*" | sendmail -F"ups@mybox" bofh@pager.example.com<br />
• Restart upsmon, pull the plug, and see what happens.<br />
That approach is bare-bones, but you should get the text content of the alert in the body of the message, since upsmon passes the<br />
alert text (from NOTIFYMSG) as an argument.<br />
7.1.3 Using more advanced features<br />
Your helper script will be run with a few environment variables set.<br />
• <strong>UPS</strong>NAME: the name of the system that generated the change.<br />
This will be one of your identifiers from the MONITOR lines in upsmon.conf.<br />
• NOTIFYTYPE: this will be ONLINE, ONBATT, or whatever event took place which made upsmon call your script.<br />
You can use these to do different things based on which system has changed state. You could have it only send pages for an<br />
important system while totally ignoring a known trouble spot, for example.
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