Use Nagios Core to report number of CPUs

[neworderfac33]

Good morning,

Once again, a big thank you to everyone out there for your continuing support!

Now - is it possible to get Nagios Core to return the number of installed CPUs (and possibly their speeds) on a server without having to install any additional plugins?

Thanks in advance

Pete

[hsmith]

Thanks for the 'shoutout'

What do you have running on the remote server? Technically you could write your own batch script and you wouldn't have to install anything! However, I assume that's not the route you want to take.

[neworderfac33]

I just have NSClient++ running on the remote servers.

No, not being THAT gifted, I'd just like to do it in a similar way to how I monitor memory, CPU load and disk space within nagios at the moment, if that's at all possible.

Cheers

[hsmith]

Can you read through Troy's article on his website and let me know if that clears any of it up?

[neworderfac33]

Good afternoon,

Although this article is useful in terms of returning information about the processors' performance, what i was really after was just a value showing how many processors there are.

More worryingly, I seem to have lost check_nrpe - should it be in /usr/local/nagios/libexec/ with all the other plugins?

I had to re-unzip the plugins .tar file to provide SSL support and now check_nrps's not there. Trouble is, until I read the article, I'd never had need to use check_nrpe, so I don't even know if it was there beforehand!

Or, am I just being really, REALLY stupid and missing something obvious?

Cheers

Pete

[tmcdonald]

I can't say I know of anything off-hand that counts the number of CPUs, that would likely need to be custom coded in Bash or PowerShell depending on the OS you want to monitor. Most everything I have seen deals with utilization.

Regarding check_nrpe, it should be in /usr/local/nagios/libexec on an XI, otherwise depending on how you installed Core it may or may not be in that location. If you are monitoring NSClient you might be using check_nt instead to grab info from it, which would explain why check_nrpe is missing and unfamiliar to you. Check the service definition and see what plugin is being used.

[Box293]

If you lost check_nrpe, this guide will help:
http://sites.box293.com/nagios/guides/n ... centos-6-5

You should be able to pull this information using a WMI query in NSClient++.

You'll need version 0.4.3.147 as check_wmi is broken in 143.
https://nsclient.org/download/0.4.3/#0.4.3.147

After installing it, open a command prompt and:

Code: Select all

cd "\Program Files\NSClient++\"
nscp settings --activate-module CheckWMI --add-defaults

Then restart the NSClient++ service.

Then the NRPE command should be something like:

Code: Select all

Command:
./check_nrpe -H win2008r2-01 -c check_wmi -a "query=Select NumberOfLogicalProcessors from win32_Processor" 

Output:
1|

OR

Code: Select all

Command:
./check_nrpe -H win2008r2-01 -c check_wmi -a "query=Select NumberOfCores from win32_Processor"

Output:
1|

This documentation should help identify the values you are after:
https://msdn.microsoft.com/en-us/librar ... 2147217396

Let us know how this works out for you.

[neworderfac33]

This was extremely useful - thank you!
I had to tweak it slightly to:

Code: Select all

define service{
        use                     generic-service
        #host_name              MyServer1,MyServer2
        hostgroup_name          MyHostGroup
        service_description     Logical_Processors_XX
        check_command           check_nrpe!check_wmi! -a "query=Select NumberOfLogicalProcessors from Win32_Processor"
}

and

Code: Select all

define service{
        use                     generic-service
        #host_name              MyServer1,MyServer2
        hostgroup_name          MyHostGroup
        service_description     Cores_XX
        check_command           check_nrpe!check_wmi! -a "query=Select NumberOfCores from Win32_Processor"
}

Both report the same - namely "1, 1, 1, 1"

Thanks very much for your assistance!

Pete

[kyang]

Sounds good! I'll be closing this thread!

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

Thanks for using the Nagios Support Forum!