Nagios Support Forum

Hi All,

Thanks for taking the time to read this. I am currently trying to setup Nagios to monitor a Feed Handler on a remote Linux box. I am so close I can taste it! Sadly, the nagios admin doesn't appear to be reading the command properly. I am new to Nagios so please bear with me, there are a lot of moving pieces so I thought i would provide as much information as possible to make it easy to figure out the issue. If there is something I am missing, please don't hesitate to ask.

To start with, the admin is successfully monitoring other services on the box, ping, processes, disk usage, etc. but for the custom plugin I am trying to read, it fails with a status of CRITICAL and status info of NULL. Here is what I believe to be the relevant config info.

On the machine being monitored
I added the perl script I created to /usr/local/nagios/libexec/custom/ (its a modification of http://www.deimos.fr/gitweb/?p=nagios_p ... 45;hb=HEAD I have tested it from the command line and it works as expected)

in the file: vi /usr/local/nagios/etc/nrpe.cfg i added
command[check_wadmin]=perl /usr/local/nagios/libexec/custom/check_wadmin.pl -f /tmp/nagiosInput.txt -i wait -n 35

On the monitoring machine
I already had the machine monitoring the remote linux box's basic stats, I did this by creating a remotelinuxhost.cfg file at /usr/local/nagios/etc/objects (and adding a reference in the main config)

To remotelinuxhost.cfg I added:

define service{
use generic-service ; Name of service template to use
host_name Sun89
service_description Check Feed Handler
check_command check_wadmin
}


I also added commands.cfg (in the same folder)

define command{
command_name check_wadmin
command_line perl /usr/local/nagios/libexec/custom/check_wadmin.pl -f /tmp/nagiosInput.txt -i wait -n 35
}

When I reloaded the service, it accepted the config but the result is as listed above... if anyone has any suggestions it would be greatly appreciated!!!

Can you run the plugin successfully from the command line as the nagios user? If yes, then I suspect you need to add a line to your perl script to include /usr/local/nagios/libexec in the perl path.

Hi Tony, Thanks for the response, sorry for my delayed reply!

To answer your question, I can run the plugin successfully from the command line as the nagios user (the box being monitored that is)

I am not sure what your second suggestion was, can you please elaborate?

Just an FYI, I also posted this question to the mailing list and they suggested I try adding the full path to the perl interpreter so I have tried the following now as well

On the machine being monitored
I have the perl script I created in /usr/local/nagios/libexec/custom/ (its a modification of http://www.deimos.fr/gitweb/?p=nagios_p ... 45;hb=HEAD I have tested it from the command line as the nagios user and it works as expected)

in the file: /usr/local/nagios/etc/nrpe.cfg i added
command[check_wadmin]=/usr/bin/perl /usr/local/nagios/libexec/custom/check_wadmin.pl -f /tmp/nagiosInput.txt -i wait -n 35



On the monitoring machine
I already had the machine monitoring the remote linux box's basic stats, I did this by creating a remotelinuxhost.cfg file at /usr/local/nagios/etc/objects (and adding a reference in the main config)

To remotelinuxhost.cfg I added:

define service{
use generic-service ; Name of service template to use
host_name Sun89
service_description Check Feed Handler
check_command check_wadmin
}


I also added to the commands.cfg file (in the same folder)

#custom - 'check_wadmin' command definition
define command{
command_name check_wadmin
command_line check_nrpe
}

*NOTE: I also tried this but when I tried to reload the service it wouldn't accept it:
define command{
command_name check_nrpe
command_line /usr/bin/perl /usr/local/nagios/libexec/custom/check_wadmin.pl -f /tmp/nagiosInput.txt -i wait -n 35
}


The Nagios web interface now has the error message:
(Return code of 127 is out of bounds - plugin may be missing)

Anyone have any ideas? Any suggestions would be much appreciated!

HI,

I have same isue with nagios i can run command successfull to check host from nagios server but my web interface is cotinusly giving this errorr.

"Return code of 127 is out of bounds - plugin may be missing"


Any solution please

Hi

I joined the mailing list to ask this question, gets much faster responses! They helped me get it working and here is how:

> I also added commands.cfg (in the same folder)
>
> #custom - 'check_wadmin' command definition
> define command{
> command_name check_wadmin
> command_line check_nrpe
> }

Bzzzt. Here's where it's incorrect.

check_nrpe only checks the status of the NRPE daemon on the remote
end. You need to use NRPE on the remote end to invoke your
check_wadmin test.

So, on your Nagios server, you need to set the command_line for the
check_wadmin command to something like:

$USER1$/check_nrpe -H $HOSTADDRESS$ -c check_wadmin


$USER1$
^^^^^^^ The path to your local plugins (on the Nagios server)

check_nrpe
^^^^^^^^^^ Need to use check_nrpe to check the command on the
remote host

-H $HOSTADDRESS$
^^^^^^^^^^^^^^^^ What host to check

-c check_wadmin
^^^^^^^^^^^^^^^ What command to
run *ON THE
REMOTE HOST*

NRPE only allows you to run plugins designed to be local-only on
a remote system. You need to tell it *what* to run, and *how*
to run it.