Nagios & Exim: check_eximmailqueue not working remotely

[sh4ka]

Hello there,

I'm running RHEL 5.4 + latest cPanel 11.24 release + Nagios 3.2

I figured out how to setup nagios and nrpe to check almost everything.. the only problem i have right now is that I wanted to monitor a remote exim exim mail queue. So, downloaded v. 1.3 from this plugin: http://exchange.nagios.org/directory...lqueue/details

Configured plugin check at Nagios server:

define service{
          use                 generic-service
          host_name           server_hostname
          service_description Mail_Queue
          check_command       check_nrpe!check_eximmailqueue
          }

On the remote server that it should check, got this at nrpe.cnf:

command[check_eximmailqueue]=/usr/local/nagios/libexec/check_eximmailqueue -w 20 -c 100

SOME TESTS ***

Nagios server, executing the plugin manually:

[[email protected]:~]../../libexec/check_nrpe -H 91.121.222.47 -p 5666 -c check_eximmailqueue
Mailqueue WARNING - query returned no output!

Exim server, manual check:

[[email protected]:~]/usr/local/nagios/libexec/check_eximmailqueue -w 20 -c 100
audit_log_user_command(): Connection refused
Mailqueue OK - 7 messages on queue

The author saids this about the error "Mailqueue WARNING - query returned no output!":

Note also, depending on your config, the nagios user will probably be needed to be added to the exim group on the machine you are checking for this script to function correctly. If the script is not run with rights to access the mail queue it will return the following "Mailqueue WARNING - query returned no output!"

Exim group, as far as I can tell, is root, so did:

usermod -g root nagios

Am I missing something?

Thanks!

[kyle-tummy]

I don't have the answer for you, but you may be missing this key piece of info:
the nagios check and the nagios server don't run as root.

The nagios plugin on the host is probably running as the nrpe? user. Try su'ing to that and then checking, and possibly adding nrpe to the nagios group.

Also on the nagios server the nagios checks are probably running as the nagios user. I don't think this is the problem but you should keep it in mind.

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[Scott.Mc]

You should remove nagios from the root user and manually check the plugin,

su nagios

Then run

/usr/local/nagios/libexec/check_eximmailqueue -w 20 -c 100

It should show you the problem. Likely have to setup /usr/local/nagios/libexec/check_eximmailqueue to the sudoers then "sudo /usr/local/nagios/libexec/check_eximmailqueue"

[Steven]

'audit_log_user_command(): Connection refused'

your going to need to get rid of that.

Also you should be using sudoers

[dexxtreme]

When it comes to issues with Nagios plugins and NRPE, the two most common issues are permissions (wrong user/group or not enough access) and paths (not specifying the full command line in a script can fail if the user the script is running as doesn't have enough entries in their path).