Home » Categories » Products » Nagios XI » Troubleshooting » Common Problems

Nagios XI - ERROR: unable to open include file: /etc/mrtg/conf.d/xxxxxxx.cfg

Problem Description

Bandwidth graphs in Nagios XI are showing no bandwidth.

When manually executing MRTG you see the following output:

MRTG Manual Command:

LANG=C LC_ALL=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

This error is produced:

ERROR: unable to open include file: /etc/mrtg/conf.d/xxxxxxx.cfg

 

The source of the problem is that you have 1000+ cfg files in the /etc/mrtg/conf.d/ directory. When MRTG runs it has to open all the files and it hits the open file limits in Linux.

 

 

Editing Files

In this article you will be required to edit files. This documentation will use the vi text editor. When using the vi
editor:

  • To make changes press i on the keyboard first to enter insert mode
  • Press Esc to exit insert mode
  • When you have finished, save the changes in vi by typing :wq and press Enter

 

 

Resolution

These steps will increase the open file limits from the default of 1024 to 4096.

Establish an SSH session to your Nagios XI server and edit the file /etc/security/limits.conf

Add the following lines to the end of the file:

* soft nofile 10000
* hard nofile 10000

Save the file.

 

Now try running MRTG manually should no longer produce the "ERROR: unable to open include file: /etc/mrtg/conf.d/xxxxxxx.cfg" message:

LANG=C LC_ALL=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

 

If you still experience the error, please reboot the server and try running MRTG again.

 

It will take at least 15 minutes for the bandwidth graphs to start showing data.

 

Final Thoughts

For any support related questions please visit the Nagios Support Forums at:

http://support.nagios.com/forum/

0 (0)
Article Rating (No Votes)
Rate this article
  • Icon PDFExport to PDF
  • Icon MS-WordExport to MS Word
Attachments Attachments
There are no attachments for this article.
Related Articles RSS Feed
Installation errors on customized corporate builds of CentOS or RHEL
Viewed 2078 times since Tue, Jan 26, 2016
Active Directory / LDAP - Troubleshooting Authentication Integration
Viewed 3146 times since Mon, Jun 26, 2017
Nagios XI - MK Livestatus Problems With Mod-Gearman
Viewed 979 times since Thu, Feb 25, 2016
Nagios XI - Optimizing The PHP Settings File
Viewed 2295 times since Thu, Jul 13, 2017
Nagios XI - Modifying The Contents Of /usr/local/nagios/etc
Viewed 936 times since Tue, Jan 26, 2016
Nagios XI - SQL Error [nagiosxi] : ERROR: syntax error
Viewed 1123 times since Sun, Sep 10, 2017
Nagios XI - ERROR: unable to open include file: conf.d/*.cfg
Viewed 1203 times since Sun, May 29, 2016
NRPE - Agent and Plugin Explained
Viewed 13444 times since Fri, Jul 14, 2017
Nagios XI - SourceGuardian Errors 2009R1.2C
Viewed 825 times since Tue, Feb 2, 2016
Nagios XI - Ajaxterm Installation Aborted
Viewed 727 times since Tue, Jan 26, 2016