Nagios Support Forum

Posted: **Tue Oct 10, 2017 10:45 am**

We are using NSClient++ 0.5.x for our Windows Servers and using the following command to customize the output for our disk checks:

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check_nrpe!check_drivesize!-a drive=C warn="used gt 80%" crit="used gt 90%" detail-syntax="%(used)/%(size) used" show-all

Which looks like this: OK 23.756GB/79.483GB used

For our Linux hosts, we use the Nagios XI NRPE agent and use the following command:

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check_nrpe!check_disk!-a '-w 10% -c 5% -p /'

Which looks like this: DISK OK - free space: / 449653 MB (89% inode=99%);

I've looked at the documentation for check_disk and can't see any options to customize the detail syntax like we do for check_drivesize. Could someone tell me if I am correct in my assumption that we would need to install the NSClient++ agent on our Linux boxes and use check_drivesize on the Linux systems if we want to do that? Or is it somehow possible with check_disk? Thanks!

Posted: **Tue Oct 10, 2017 11:08 am**

The plugin "check_disk_space", available on Nagios Exchange would appear to meet your needs.

It returns Total, Used, and Free disk space from a linux host.

Let us know if this works for you.

Posted: **Tue Oct 10, 2017 11:24 am**

Nice one @bolson!

In case you wanted to see an example of usage.

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Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
                       37G  4.3G   31G  13% /
tmpfs                 1.5G     0  1.5G   0% /dev/shm
/dev/sda1             477M   95M  357M  22% /boot

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[root@localhost libexec]# ./check_disk_space -w 60 -c 70 -p /
OK; /: total 36.8GB, used 4.2GB (11.5%), free 30.7GB (83.4%) | 'used space'=4534738944B;23724665241;27678776115;0;39541108736 'used space (pct.)'=11.5%;60;70;0;100

Here's the link to save you some time.
https://exchange.nagios.org/directory/P ... ce/details

Posted: **Tue Oct 10, 2017 11:24 am**

gmackey wrote:Could someone tell me if I am correct in my assumption that we would need to install the NSClient++ agent on our Linux boxes and use check_drivesize on the Linux systems if we want to do that?

NSClient++ doesn't use the official nagios-plugins. It does it's own thing on the back-end. check_drivesize (which is a wrapper for check_drive) in NSClient++ functions totally differently from check_disk in nagios-plugins.

You certainly could build NSClient++ on your Linux machines, but it's an awful lot of work and isn't a setup that gets much testing against Nagios XI.

Posted: **Tue Oct 10, 2017 2:01 pm**

Thanks @mcapra!

@gmackey, let us know if you have any more questions.

Posted: **Tue Oct 10, 2017 4:28 pm**

Thank you, guys. We've tested the check_disk_space plugin and like the results. We'll get all our Linux disk checks switched over. I appreciate the quick and thorough responses!

Posted: **Tue Oct 10, 2017 4:33 pm**

Sounds great! I'll be closing this topic as resolved!

If you have any more questions, feel free to create another thread!

Thank you for using the Nagios Support Forum!

Nagios Support Forum

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