Install the Nagios NRPE server.

Start the NRPE daemon:

shell> sudo /etc/init.d/nagios-nrpe-server start

Add the IP of your Nagios server to the /etc/nagios/nrpe.cfg configuration file. For example:

allowed_hosts=127.0.0.1,192.168.2.20

Add the Tungsten check commands that you want to execute to the /etc/nagios/nrpe.cfg configuration file. For example:

command[check_tungsten_online]=/opt/continuent/tungsten/cluster-home/bin/check_tungsten_online

Restart the NRPE service:

shell> sudo /etc/init.d/nagios-nrpe-server start

If the commands need to be executed with superuser privileges, the /etc/sudo or /etc/sudoers file must be updated to enable the commands to be executed as root through sudo as the nagios user. This can be achieved by updating the configuration file, usually performed by using the visudo command:

nagios          ALL=(tungsten)  NOPASSWD: /opt/continuent/tungsten/cluster-home/bin/check*

In addition, the sudo command should be added to the Tungsten check commands within the Nagios nrpe.cfg, for example:

command[check_tungsten_online]=/usr/bin/sudo -u tungsten /opt/continuent/tungsten/cluster-home/bin/check_tungsten_online

Restart the NRPE service for these changes to take effect.

Add an entry to your Nagios services.cfg file for each service you want to monitor:

define service {
        host_name database
        service_description     check_tungsten_online
        check_command           check_nrpe! -H $HOSTADDRESS$  -t 30 -c check_tungsten_online
        retry_check_interval    1
        check_period            24x7
        max_check_attempts      3
        flap_detection_enabled  1
        notifications_enabled   1
        notification_period     24x7
        notification_interval   60
        notification_options    c,f,r,u,w
        normal_check_interval   5
}