Originally published 2016-11-21 on the UoB Unix blog Several times, senior management have asked Team Wireless to provide an uptime figure for eduroam. While we do have an awful lot of monitoring of systems and services, it has never been possible to give a single uptime figure because it needs some detailed knowledge to make sense of […]Read more "Service availability monitoring with Nagios and BPI"
I just spotted that my Nagios/RRD graphs of my home server are showing a strange correlation. From these graphs, it seems that the higher the outdoor temperature, the more free memory the system has available. I’m sure this is just a coincidence, though…Read more "An unlikely correlation"
As I said in a previous post, I finally got my TEMPer USB thermometer to work on Fedora, thanks to a patch by Tollef Fog Heen that has now been incorporated into the Fedora kernel. I’m not familiar with C so I only made minor tweaks to Tollef Fog Heen’s code, which returns a temperature […]Read more "Nagios plugin for TEMPer USB thermometer"
This a short and simple guide, explaining how to set up remote monitoring of Linux hosts using NRPE in Nagios. The procedure is simple, but having searched for information on this earlier today I didn’t find a straightforward all-inclusive guide, so I’ve written my own. These instructions were written with Nagios 3.0.6, and they assume […]Read more "Setting up NRPE remote Linux monitoring with Nagios"
I’ve just written a module for Nagios that will determine if the currently running kernel is the latest kernel available on the system. It will not tell you if there is a newer kernel in a yum repository or similar. The main gotcha is that you need an RPM-based system for my script to work, […]Read more "Checking for the latest kernel with Nagios"
Further to yesterday’s post about setting up SMS alerts from Nagios, I decided I wanted to monitor how many SMS credits I have left in my account. AQL provide a way of finding out via an HTTP request, so I set about writing a perl module to check and return the result to Nagios. N.B. […]Read more "Monitoring AQL SMS credit with Nagios"
In a previous post I mentioned how easy it is to increase functionality in Nagios. Today I was asked to set up SMS alerts in Nagios, as well as the existing email alerts. I am by no means the first person to write about this, but this post is intended to be a start-to-finish guide, […]Read more "SMS alerts with Nagios"
The things I’m about to say will almost certainly be common knowledge to anyone who has used Nagios before, but I’ll say them anyway. In short, Nagios is a network/server monitoring tool. It’s web based and can monitor almost any network device. It comes with dozens of modules included, to monitor things with something as […]Read more "On Nagios"