Overseer

A collection of monitoring scripts for Nagios

1. Lag speed check
   • confirms that your ports are running at correct speed
   • runs on the Nagios server using SNMP
2. Kernel version check
   • confirms that you are running the kernel that you expect
   • runs on the host target using NRPE
3. PDNS records check
   • scans for empty records in Power DNS log files
   • runs on the host target using NRPE

Lag speed check

Add the following to your Nagios commands.cfg file:

define command{
        command_name    check_lag
        command_line    $USER1$/check_lag $HOSTADDRESS$ $ARG1$ $ARG2$
}

Example services.cfg config:

define service {
    use                      network-service
    host_name                rtr01.ams1
    service_description      LAG: TRANSIT: AS3356 Level3
    check_command            check_lag! ae61 20000
}
define service {
    use                      network-service
    host_name                rtr01.fra1
    service_description      LAG: TRANSIT: AS2914 NTT
    check_command            check_lag! ae62 10000
}

Voilà :]

Kernel version check

Specify the correct kernel variable. Add the following to your Nagios commands.cfg file:

define command{
	command_name	check_kernel
	command_line	$USER1$/check_nrpe -H $HOSTADDRESS$ -c check_kernel
	}

Add the script to NRPE on the host server(s)

PDNS records check

Add the following to your Nagios commands.cfg file:

define command{
	command_name	check_pdns
	command_line	$USER1$/check_nrpe -H $HOSTADDRESS$ -c check_pdns
	}