NRPE give error on web interface but CLI will return result

[wleming]

Hello everyone and thank you for your time.

My nagios core 4.1.1 server is running on Ubuntu 14.04 and was compiled from source.

Client I am trying to monitor is running Ubuntu 14.04 and the NRPE package was used.

I created a command to check the state of the chrome web browser in /etc/nagios/nrpe.cfg command

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[check_chrome]=/usr/lib/nagios/plugins/check_procs -C chrome

On the nagios server I can run

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 ./check_nrpe -H 10.0.4.44 -c check_ chrome 

and I get the return

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PROCS OK: 4 processes with command name 'chrome' | procs=4;;;0;

Which is exactly what I want-BUT on the web interface I get

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(Return code of 255 is out of bounds)

On the nagios server I have the service in the configuration files as

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define host {
        use                             linux-server
        host_name                       <NOT REAL NAME>
        alias                            Room 102
        address                         10.0.4.44
        hostgroups                      XXX
        max_check_attempts              5
        check_period                    24x7
        notification_interval           30
        notification_period             24x7
}



        define service{
        use                             local-service
        host_name                       <NOT REAL NAME>
        service_description             Check Chrome 
        check_command                   check_nrpe!check_chrome
        check_interval                  1
        }

So I am confused as to why I can use the check_nrpe on the CLI, but when I try via the web interface I get an error. Can someone please point me in the correct direction? Thank you again for your time.

[tgriep]

Could you post how your check_nrpe command is defined in your commands.cfg file on your Nagios server?

[wleming]

Yes, sorry for not including that.

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######### 'check_nrpe' command definition
define command{
        command_name    check_nrpe
        command_line    $USER1$/check_nrpe -H $HOSTNAME$ -c $ARG1$

Thank you very much.

[hsmith]

Can you try to run the same command from the command line as the 'nagios' user? I am assuming you ran the first check as root?

[wleming]

I will investigate this. For now I have been running as an admin user that has root settings.

[hsmith]

Let us know what you come up with.

Thanks!

[wleming]

I don't have a set "nagios" user. I just compiled from source and made the "nagiosadmin" as in the instructions. Should I add this to the users of the system as well? Would this not create a possible security issue of having a user with "admin" rights?

[hsmith]

Can I see what instructions you used?

[wleming]

These were the instructions that my co-worker used:

https://www.digitalocean.com/community/ ... untu-14-04

[hsmith]

sudo useradd nagios
sudo groupadd nagcmd
sudo usermod -a -G nagcmd nagios

What is the out put of a grep nag /etc/passwd command?