I wrote a simple plugin in perl called "check_temperature.pl", and placed this plugin on both the
nagios monitor (localhost) and a remotehost. The check_temperature is called through check_nrpe as shown in the following service
definition
Code: Select all
define service{
use generic-service ; Name of service template to use
host_name remotehost
service_description check temperatures ; just try to simulate
contact_groups admins
check_command check_nrpe!check_temperature
check_interval 5
notifications_enabled 1
notification_options w,c
notification_period 24x7
notification_interval 5
register 1
}On the web interface, I can see the status changes from OK to CRITICAL, however, the Last Notification shown as N/A (notification 0).
However, if I define the "check_local_temperature" on the local machine, I got email notification. On the remotehost, I got email
notification for some other services such as check_disk. Below is the simple plugin. Could someone enlighten me why the
notification is not working? Thanks a lot!
Code: Select all
#!/usr/bin/perl
use Nagios::Plugin;
#
#set up
#
$np=Nagios::Plugin->new(
shortname=>"Temperature",
usage=>"Usage: %s [-w warning] [-c critital] [-h host]"
);
$np->add_arg(
spec=>"critical|c=s",
help=>"-c, --critical=RANGE",
);
$np->add_arg(
spec=>"warning|w=s",
help=>"-w, --warning=RANGE",
);
$np->add_arg(
spec=>"host|h=s",
help=>"-h, --host=host\n. the host to be monitored",
required=>1,
);
$np->getopts;
#
#get data
#
$celsius=int rand(100);
$host=$np->opts->host;
#------------------------------------------------------
#calculate and set the performance data
# uom=>s,ms,us,%, B,KB,MB,TB,c or none
# warning=>...
# critical=>...
$np->add_perfdata(
label=>"celsius",
value=>$celsius,
threshold=>$np->set_thresholds(warning=>20,critical=>$np->opts->critical),
);
#------------------------------------------------------------------
#exit with status based on the performance data. the output
#is best to be single line with less than 80 characters.
# $np->nagios_exit(CRITICAL,...)
# $np->nagios_exit(OK,...)
# $np->nagios_exit(WARNING,...)
# $np->nagios_exit(UNKNOWN,...)
np->nagios_exit(
return_code=>$np->check_threshold($celsius),
message=>"Temperature $celsius degrees at " . $host,
);