Can anyone explain to me how I would setup an event handler to send a trap
when a service hits a hard state?
Currently I have added this to my services.cfg file under the service
definition I want to trap on:
event_handler send-trap
I am not sure where to set up send-trap now. I have added this to my
checkcommands.cfg file as:
# 'send-trap' command definition
define command{
command_name send-trap
command_line /usr/local/bin/snmptrap -v 1 -c public
192.234.243.145 1.3.6.1.4.1.3224 $HOSTADDRESS$ 6
17 ''
}
And also tried this:
# 'send-trap' command definition
define command{
command_name send-trap
command_line $USER1$/send-trap $HOSTADDRESS$
}
Where send-trap is a modified version of the example event handler script
from the nagios docs:
#!/bin/sh
#
# Event handler script for sending a trap
#
#
#
# What state is the service in?
case "$1" in
OK)
# The service just came back up, so don't do anything...
;;
WARNING)
# We don't really care about warning states, since the service is
probably still running...
;;
UNKNOWN)
# We don't know what might be causing an unknown error, so don't do
anything...
;;
CRITICAL)
# Aha! The service appears to have a problem - perhaps we should
send a trap...
# Is this a "soft" or a "hard" state?
case "$2" in
# We're in a "soft" state, meaning that Nagios is in the middle of
retrying the
# check before it turns into a "hard" state and contacts get
notified...
SOFT)
# What check attempt are we on? We don't want to restart
the web server on the first
# check, because it may just be a fluke!
case "$3" in
# Wait until the check has been tried 3 times before sending
the trap.
# If the check fails on the 4th time (after we restart the
web server), the state
# type will turn to "hard" and contacts will be notified of
the problem.
# Hopefully this will restart the web server successfully,
so the 4th check will
# result in a "soft" recovery. If that happens no one gets
notified because we
# fixed the problem!
3)
echo -n "Sending a Trap (3rd soft critical
state)..."
# Call the script to send a trap
/usr/local/bin/snmptrap -v 1 -c public
192.234.243.145 1.3.6.1.4.1.3224 $HOSTADDRESS$ 6 17 ''
;;
esac
;;
echo -n "Sending Trap..."
# Call the script to send a trap
/usr/local/bin/snmptrap -v 1 -c public 192.234.243.145
1.3.6.1.4.1.3224 $HOSTADDRESS$ 6 17 ''
;;
;;
esac
;;
esac
exit 0
The only thing I get from the nagios.log file is:
[1099515319] SERVICE EVENT HANDLER: Demo;E1_Interface_State;WARNING;
HARD;1;send-trap
No trap is sent.
Any ideas what am I missing here?
Thanks.
Bill
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