Nagios Support Forum

Posted: **Fri Sep 02, 2016 8:17 pm**

Nagios 4.1.1 on Ubuntu Server 16.04

trying to get this to work

My Command.cfg entry

define command{
        command_name    check_users
        command_line    $USER1%/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$
}

My Service

Code: Select all

define service {
        host_name                       TGCS025
        service_description             Check All Users
        check_command                   check_nrpe!check_users! -a check_users -w 15 -c 20
        servicegroups                   AllServices
        check_interval                  1
        use                             generic-service
}

from the Nagios server I run this

root@tgcs017:/usr/local/nagios/etc/objects# /usr/lib/nagios/plugins/check_nrpe -H 10.2.8.36 -t 30 -c check_users -a 15 20
No handler for command: check_users

What am I missing here

Thanks

Tom

getting this

Check All Users

UNKNOWN 09-02-2016 21:08:50 0d 0h 0m 26s 1/3 (No output returned from plugin)

UPDATE UPDATE

I made this change to my service

Code: Select all

define service {
        host_name                       TGCS025
        service_description             Check All Users
        check_command                   check_nrpe!check_users! -a  '-w 15 -c 20'
        servicegroups                   AllServices
        check_interval                  1
        use                             generic-service
}

Now I get this on Nagios

UNKNOWN 09-03-2016 14:38:30 0d 17h 30m 34s 3/3 No handler for command: check_users

Thoughts

Posted: **Sun Sep 04, 2016 9:40 pm**

Code: Select all

        command_line    $USER1%/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$

Should be

Code: Select all

        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$

Note $USER1% should be $USER1$

Posted: **Sun Sep 04, 2016 9:58 pm**

I made this change

Code: Select all

define command{
        command_name    check_users
        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$
}

Good catch but still get this

UNKNOWN 09-04-2016 22:56:13 2d 1h 47m 48s 3/3 No handler for command: check_users

Thoughts?

Posted: **Sun Sep 04, 2016 10:09 pm**

That's something in your nrpe.cfg file on the remote host.

Posted: **Sun Sep 04, 2016 10:17 pm**

are you talking about the host I am checking?

If so I do not have a nrpe.cfg file on that server.

Just on my Nagios server

I have other commands and services that I use for nrpe against the same tgcs025 and they work fine

Confused here

Posted: **Sun Sep 04, 2016 10:21 pm**

Whatever host you're checking via NRPE, you need to allow the "check_users" command to be executed. Read up on NRPE documentation (specifically, what goes in nrpe.cfg) and you'll see what I mean.

Posted: **Sun Sep 04, 2016 10:36 pm**

what nrpe doc? link please

On My Nagios server

I have this
define service {
host_name TGCS025
service_description Check Disk Usage D:
check_command check_nrpe!CheckDriveSize! -a ShowAll=long MinWarn=20% MinCrit=10% Drive=D: perf-unit=G
check_interval 1
servicegroups DriveSpace
use generic-service
}

It works fine again the same host just a different check

Posted: **Sun Sep 04, 2016 10:44 pm**

https://assets.nagios.com/downloads/nag ... e/NRPE.pdf

Posted: **Sun Sep 04, 2016 11:03 pm**

Thanks

I have see that and my NRPE is setup correctly on my Nagios server

From the Nagios server I ran this

root@tgcs017:/usr/lib/nagios/plugins# ./check_nrpe -H 10.2.8.36
I (0,4,1,73 2012-12-17) seem to be doing fine...

That is TGCS025 HOST ip address

But this fails

root@tgcs017:/usr/lib/nagios/plugins# ./check_nrpe -H 10.2.8.24 -t 30 -c check_users No handler for command: check_users

This is the nrpe.cfg on my Nagios server just a part of it

Code: Select all

# The following examples use hardcoded command arguments...

command[check_users]=/usr/lib/nagios/plugins/check_users -w 5 -c 10
command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200


# The following examples allow user-supplied arguments and can
# only be used if the NRPE daemon was compiled with support for
# command arguments *AND* the dont_blame_nrpe directive in this
# config file is set to '1'.  This poses a potential security risk, so
# make sure you read the SECURITY file before doing this.

#command[check_users]=/usr/lib/nagios/plugins/check_users -w $ARG1$ -c $ARG2$
#command[check_load]=/usr/lib/nagios/plugins/check_load -w $ARG1$ -c $ARG2$
#command[check_disk]=/usr/lib/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
#command[check_procs]=/usr/lib/nagios/plugins/check_procs -w $ARG1$ -c $ARG2$ -s $ARG3$

Posted: **Mon Sep 05, 2016 8:40 am**

The NRPE document only shows how to check Linux hosts

What about Windows Hosts

Nagios Support Forum

Check_Users no output returned from plugin

Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin

Re: Check_Users no output returned from plugin