Nagios Support Forum

I've discovered a bug in the Network Switch / Router Wizard.

Basically, MRTG always creates files in /var/lib/mrtg/ as lower case. When running the wizard, if you used a DNS address name that had upper case letters, when the bandwidth services are created, the $ARG1$ value is populated as it is typed in the wizard, however the .rrd file will always be in lowercase.

The resulting error for the service will be "/var/lib/mrtg/iNS04_3.rrd does not exist.".

Let me explain in more detail.

• I run the Network Switch / Router Wizard
  In the Switch/Router Address field I type in iNS04
  I complete the wizard, selecting the ports that I want to monitor bandwidth for
  The mrtg file is populated with the switch address iNS04 <--- notice the case is still the same
  The bandwidth service definition created for the ports populate the $ARG1$ field with iNS04_3.rrd <--- notice the case is still the same
  When I go and look in /var/lib/mrtg/ the file exists, but in lower case ins04_3.rrd <--- notice the case is all lower
  The resulting error for the service will be "/var/lib/mrtg/iNS04_3.rrd does not exist."
  If I go and update the $ARG1$ field in the service definitions to lower case, everything starts working OK

I have two possible solutions:
1) When the wizard creates the service definitions, the $ARG1$ field should be populated in lower case
2) Update the script check_rrdtraf so the value abtained from $ARG1$ is converted to lowercase (the -f argument)

I discovered this in version 1.3 of the Wizard.

Nice catch, I will throw this up onto tracker and assign our maintainer of that wizard.

Edit: Here is a link to your bug submission. http://tracker.nagios.com/view.php?id=424

I went the route of adjusting the lower case in the wizard rather than the plugin for maintenance reasons. I have attached it to this post. Please let me know if it solves the issue. Thanks for bringing it to our attention Box!

No problems

The updated wizard fixed the problem, works a treat.

Thanks for the feedback, Troy!