Nagios Support Forum

Hi all, i'm not understand, why nagios event handler not worked. =-(

Nagios server log file:
nagios:~ # tail -f /var/opt/nagios/local/nagios.log | perl -pe 's/(\d+)/localtime($1)/e' | grep myhostname.*
[Thu Jun 15 12:35:44 2017] SERVICE ALERT: myhostname;NTP::Service availability;CRITICAL;SOFT;1;NTPD service inactive\n
[Thu Jun 15 12:35:44 2017] SERVICE EVENT HANDLER: myhostname;NTP::Service availability;CRITICAL;SOFT;1;restart-ntpd
[Thu Jun 15 12:36:48 2017] SERVICE ALERT: myhostname;NTP::Service availability;CRITICAL;SOFT;2;NTPD service inactive\n
[Thu Jun 15 12:36:48 2017] SERVICE EVENT HANDLER: myhostname;NTP::Service availability;CRITICAL;SOFT;2;restart-ntpd
[Thu Jun 15 12:37:48 2017] SERVICE ALERT: myhostname;NTP::Service availability;CRITICAL;SOFT;3;NTPD service inactive\n
[Thu Jun 15 12:37:48 2017] SERVICE EVENT HANDLER: myhostname;NTP::Service availability;CRITICAL;SOFT;3;restart-ntpd
[Thu Jun 15 12:38:51 2017] SERVICE ALERT: myhostname;NTP::Service availability;CRITICAL;HARD;4;NTPD service inactive\n
[Thu Jun 15 12:38:51 2017] SERVICE EVENT HANDLER: myhostname;NTP::Service availability;CRITICAL;HARD;4;restart-ntpd


command.cfg:
define command {
command_name restart-ntpd
command_line $USER$/check_nrpe -H $HOSTADDRESS$ -c restart-ntpd -a $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$
}


local command file (/etc/nrpe.d):
command[restart-ntpd]=/usr/lib64/nagios/plugins/eventhandlers/restart-ntpd $ARG1$ $ARG2$ $ARG3$

event handler script:
rights:
[root@myhostname sergey]# ll /usr/lib64/nagios/plugins/eventhandlers/restart-ntpd
-rwxrwxr-x 1 root root 525 Jun 15 12:27 /usr/lib64/nagios/plugins/eventhandlers/restart-ntpd

script:
#!/bin/sh
case "$1" in
OK)
;;
WARNING)
;;
UNKNOWN)
;;
CRITICAL)
case "$2" in
SOFT)
case "$3" in
1)
;;
2)
;;
3)
echo -n "Restarting NTP service (3rd soft critical state)..."
/usr/bin/sudo /bin/systemctl restart ntpd > /dev/null
;;
esac
;;
HARD)
echo -n "Restarting NTP service..."
/usr/bin/sudo /bin/systemctl restart ntpd > /dev/null
;;
esac
;;
esac
exit 0

User nrpe added in sudoers, and if i do command - "/opt/nagios/libexec/check_nrpe -H myhostname -c restart-ntpd -a CRITICAL SOFT 3" from nagios server, all works fine, service on remote host was restarted.

Please help, i don't know where problem...

Can you add this to the top of your /usr/lib64/nagios/plugins/eventhandlers/restart-ntpd script on the remote host, simulate the failure and post the /tmp/event file from the remote server?

Hello tgriep,

Thanks for you reply! Yesterday i solved problem. The problem has been in the same command name in service configuration that in the local nrpe configuration on remote host, after i change name in service configuration on nagios server (service.cfg and commands.cfg), event handler has earned.

command.cfg:
define command {
command_name restart-ntpd
command_line $USER$/check_nrpe -H $HOSTADDRESS$ -c restart-ntpd -a $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$
}

in service.cfg for check of ntp service, i changed event_handler parameter value to restart-ntp-host, and change command_name value in commands.cfg on the same.

Thank you!
Best regards,
Sergey Kuzmitskiy

Glad you figured it out. I'll close and lock the post for you but if you have a new issue in the future, feel free to open a new post.