Have Nagios execute a command when it detects a down host

Question

I would like Nagios to execute a Bash command/script when it detects a host down or up. This would allow me to react to down hosts to some degree which would be very interesting.

How would I do this ?

score 7 · Accepted Answer · answered Dec 20 '10 at 17:00

7

Event handlers are your friends: http://nagios.sourceforge.net/docs/3_0/eventhandlers.html.

answered Dec 20 '10 at 17:00

Massimo

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Thank you very much that is exactly what I was looking for :-) – Antoine Benkemoun Dec 20 '10 at 17:05

score 3 · Answer 2 · answered Dec 20 '10 at 17:53

into your commands file add the command you need

define command{
# try this before

command_name my_restart
command_line /usr/lib64/nagios/plugins/my_restart.sh $HOSTADDRESS$ $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$
}

into your service defination

define service{
 .....
event_handler           my_restart
 ....

}

the arguments that you receive into your script are the ones defined into the command file, you can see them as well by doing echo $@ into your script - is important to know the host address in case that you will call against a remote host and the service state (you take different actions on CRITICAL, OK or WARNING)

i suggest you have some logging into your script at least at the beginning.

Note that if it's a HOST check the states are UP/DOWN/UNREACHABLE not CRITICAL/WARNING/OK/UNKNOWN. Important distinction! — TheFiddlerWins, Oct 11 '16 at 14:20

Have Nagios execute a command when it detects a down host

2 Answers2