Nagios Support Forum

Posted: **Fri Oct 24, 2014 2:50 pm**

We are trying to monitor a process on a linux host. This is a JBOSS Standalone process. There should only ever be one. However, the setup wants a number of instances for warning and critical.

I need to have ncpa say Critical if the process is not found.

When I try this

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-M 'process/run.sh/' -c 0

I get this

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COMMAND: /usr/local/nagios/libexec/check_ncpa.py -H servername -t 'mytoken' -P 5693 -M 'process/run.sh/' -c 0
OUTPUT: CRITICAL: Process count for processes named run.sh was 1c | 'process_count_0'=1c;;0;

I have tried variations like -1 and nothing is working.

Is there no way for ncpa to check to see if a process is running and alert if it isnt?

Posted: **Sat Oct 25, 2014 12:45 pm**

Nevermind found my the answer the Nagios Plugin Development docs:

https://nagios-plugins.org/doc/guidelin ... PLUGOUTPUT

If you scroll down to Table 4 Command Line Examples you will see the table that shows the parameters for "Counting stuff"

If you have an Application or Service that executes a single process, and you want to monitor if that paticualr process is available (For linux running single instance JBOSS server this is just a running process) here is the check_ncpa command that will do just that. **Note this is setup from the XI GUI under CCM>Services. You will have to go into Core Confiuration Manager and edit/create the service check direcly.

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 -M 'process/run.sh/' -c1:

Notice the -c1:

The ":" is important. Referring back to Table 4 in the Plugin Development doc you will see that -c1:

check_stuff -c1: Critical if "stuff" is less than 1

So if you have a situation where there is just 1 process, the NCPA configuration wizard will NOT let you set this up properly. The default logic created is based on "More Than". This allows you to look for "Less Than" 1.

This can also be any number like -c10: if you have a situation where you know there should be a minimum number of worker processes running at all times and you need to know if this drops below (Less Than) your defined number (10 in this example).

The table in the plug-in dev doc also provides other great examples for other unique situations as well.

Just sharing and hope it helps someone else as well.

Posted: **Mon Oct 27, 2014 9:05 am**

krobertson71 wrote:Just sharing and hope it helps someone else as well.

Always appreciated! I'm going to lock this for the sake of organization, but feel free to open up another thread if you have anything else to share!

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