Hello Dev, are you struggling to add a Windows host to your Nagios monitoring server? Fret no more! In this article, we will guide you through the entire process with easy-to-follow steps and screenshots to make it as simple as possible. Without further ado, let’s begin.
Preparations
Before we begin, there are a few things that you need to have in place:
Requirement |
Description |
Nagios Core |
You must have Nagios Core installed on your monitoring server. |
NSClient++ |
You need to install NSClient++ on your Windows host machine. |
Admin Credentials |
You should have administrative credentials for both the monitoring server and Windows host. |
Step-by-Step Guide
Step 1: Install NSClient++ on Windows Host
The first step is to install NSClient++ on your Windows host. You can download the latest version from the official website (https://docs.nsclient.org/installing/). Follow the instructions to install it and select the appropriate options. After installation, make sure that the NSClient++ service is running on your Windows host.
Step 2: Edit NSClient++ Configuration
Now, we need to configure NSClient++. Locate the NSC.ini file under the NSClient++ installation directory. Open it with your favorite text editor and make the following changes:
- Uncomment the following line to allow remote access
allowed_hosts=127.0.0.1,192.168.1.10
- Add your monitoring server IP address to the
allowed_hosts
list
- Add the following line to enable NRPE server
nrpe_port=5666
Save the file and restart the NSClient++ service.
Step 3: Install NRPE Plugin on Monitoring Server
The next step is to install the NRPE plugin on your monitoring server. The easiest way to do this is to download it from the official Nagios Exchange website (https://exchange.nagios.org/directory/Plugins/Operating-Systems/Windows/check_nrpe-2Epl/details). Extract the plugin to the Nagios plugins directory (/usr/local/nagios/libexec/
for Linux or C:\Program Files\Nagios\plugins\
for Windows).
Step 4: Define Windows Host in Nagios Configuration
Now, we need to define the Windows host in the Nagios configuration. Open the hosts.cfg
file under the Nagios configuration directory (/usr/local/nagios/etc/objects/
for Linux or C:\Program Files\Nagios\etc\objects\
for Windows). Add the following code:
define host{usewindows-serverhost_namewindows-hostaliasWindows Hostaddress192.168.1.20}
Make sure to replace the values with your own. The use
directive specifies the host template to use. If you don’t have one, you can create it in the templates.cfg
file. The host_name
is an arbitrary name for the host, the alias
is a friendly name for display purposes, and the address
is the IP address of your Windows host.
Step 5: Define Service Checks for Windows Host
The final step is to define the service checks for your Windows host. Open the services.cfg
file under the Nagios configuration directory and add the following code:
define service{usegeneric-servicehost_namewindows-hostservice_descriptionC:\ Drive Free Spacecheck_commandcheck_nrpe!check_drive_size!-d C: -w 80% -c 90%}
Again, make sure to replace the values with your own. The use
directive specifies the service template to use. If you don’t have one, you can create it in the templates.cfg
file. The service_description
is an arbitrary name for the service, and the check_command
specifies the NRPE command to run on the Windows host.
FAQ
What if I don’t have administrative credentials for the Windows host?
You need administrative credentials to install and configure NSClient++ on the Windows host. If you don’t have them, you should contact the owner or IT department responsible for the machine.
What if I have multiple Windows hosts to monitor?
You can repeat the entire process for each Windows host and define them in the Nagios configuration.
What if the NRPE plugin doesn’t work?
Make sure that you have configured NSClient++ correctly and that the NRPE plugin is in the correct directory. You can also check the NRPE log file for any errors or issues.
Is there an easier way to monitor Windows hosts with Nagios?
Yes, you can use a third-party plugin like Winrpe or check_wmi_plus that uses WMI instead of NRPE.
Congratulations! You have successfully added a Windows host to your Nagios monitoring server. We hope this article has been helpful to you. If you have any issues or questions, feel free to leave a comment below.
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