Nagios Windows Define Services

Configuring Nagios
 
Now it's time to define some object definitions in your Nagios configuration files in order to monitor the new Windows machine.
Open the windows.cfg file for editing.

vi /usr/local/nagios/etc/objects/windows.cfg

Add a new host definition for the Windows machine that you're going to monitor. If this is the *first* Windows machine you're monitoring, you can simply modify the sample host definition in windows.cfg. Change the host_name, alias, and address fields to appropriate values for the Windows box.

define host{
 use  windows-server ; Inherit default values from a Windows server template (make sure you keep this line!)
 host_name  winserver
 alias  My Windows Server
 address  192.168.1.2
 }

Good. Now you can add some service definitions (to the same configuration file) in order to tell Nagios to monitor different aspects of the Windows machine. If this is the *first* Windows machine you're monitoring, you can simply modify the sample service definitions in windows.cfg.
Note: Replace "winserver" in the example definitions below with the name you specified in the host_name directive of the host definition you just added.
Add the following service definition to monitor the version of the NSClient++ addon that is running on the Windows server. This is useful when it comes time to upgrade your Windows servers to a newer version of the addon, as you'll be able to tell which Windows machines still need to be upgraded to the latest version of NSClient++.

define service{
 use   generic-service
 host_name   winserver
 service_description NSClient++ Version
 check_command  check_nt!CLIENTVERSION
 }

Add the following service definition to monitor the uptime of the Windows server.

define service{
 use   generic-service
 host_name   winserver
 service_description Uptime
 check_command  check_nt!UPTIME
 }

Add the following service definition to monitor the CPU utilization on the Windows server and generate a CRITICAL alert if the 5-minute CPU load is 90% or more or a WARNING alert if the 5-minute load is 80% or greater.

define service{
 use   generic-service
 host_name   winserver
 service_description CPU Load
 check_command  check_nt!CPULOAD!-l 5,80,90
 }

Add the following service definition to monitor memory usage on the Windows server and generate a CRITICAL alert if memory usage is 90% or more or a WARNING alert if memory usage is 80% or greater.

define service{
 use   generic-service
 host_name   winserver
 service_description Memory Usage
 check_command  check_nt!MEMUSE!-w 80 -c 90
 }

Add the following service definition to monitor usage of the C:\ drive on the Windows server and generate a CRITICAL alert if disk usage is 90% or more or a WARNING alert if disk usage is 80% or greater.

define service{
 use   generic-service
 host_name   winserver
 service_description C:\ Drive Space
 check_command  check_nt!USEDDISKSPACE!-l c -w 80 -c 90
 }

Add the following service definition to monitor the W3SVC service state on the Windows machine and generate a CRITICAL alert if the service is stopped.

define service{
 use   generic-service
 host_name   winserver
 service_description W3SVC
 check_command  check_nt!SERVICESTATE!-d SHOWALL -l W3SVC
 }

Add the following service definition to monitor the Explorer.exe process on the Windows machine and generate a CRITICAL alert if the process is not running.

define service{
 use   generic-service
 host_name   winserver
 service_description Explorer
 check_command  check_nt!PROCSTATE!-d SHOWALL -l Explorer.exe
 }

That's it for now. You've added some basic services that should be monitored on the Windows box. Save the configuration file.
Password Protection
If you specified a password in the NSClient++ configuration file on the Windows machine, you'll need to modify the check_nt command definition to include the password. Open the commands.cfg file for editing.

vi /usr/local/nagios/etc/objects/commands.cfg

Change the definition of the check_nt command to include the "-s <PASSWORD>" argument (where PASSWORD is the password you specified on the Windows machine) like this:

define command{
 command_name check_nt
 command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -s PASSWORD -v $ARG1$ $ARG2$
 }

Save the file.
Restarting Nagios
You're done with modifying the Nagios configuration, so you'll need to verify your configuration files and restart Nagios.
If the verification process produces any errors messages, fix your configuration file before continuing. Make sure that you don't (re)start Nagios until the verification process completes without any errors!


REFF:
https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/3/en/monitoring-windows.html