« Previous Entries

The Archives

10.12.09

Database fix for Nagios plugin for Cacti Binary Talks | (0)
If you're interested in running Nagios within the Cacti interface you may be interested in the Nagios plugin for Cacti (NPC) project which does a good job overall in combining these two powerful tools within the monitoring/graphing world. Nevertheless, I had a database related problem during the initial setup due to the fact that NPC brings along its own schema of the ndo database which is outdated since the last release of ndoutils 1.4b8 (they added a new column called long_output). Therefore, you want do the changes below via your mysql console to the following tables if you'd like to use ...

Tagged: cacti, mysql, nagios, network monitoring, open source, plugin, sysadmin
09.08.09

Update 1.3: Apache check plugin for Nagios Binary Talks | (6)
Long time no see. Sorry for the long downtime, but I've been on vacation for quite some time and spent my time out of reach of any electronical device except my phone. Anyway, strength and motivation for work during spare time is back again! Expect a few updates of various plugins I've written in the past within the next weeks. For the beginning here's the revised version of the Apache check plugin for Nagios. It now doesn't write temporary files anymore, the code is cleaner and it should be a bit faster. Note that I haven't done much testing for now ...

Tagged: apache webserver, gplv2, linux, nagios, network monitoring, open source, plugin, shell scripting, ssl, sysadmin
06.16.09

Update 1.1: nginx Check Plugin for Nagios Binary Talks | (1)
Last week I've got an E-Mail by Jordi, who's blogging at terraquis.net, with a few suggestions to the nginx check plugin I've recently released. He made two significant changes to the plugin: His version runs with bash only, but except bc all external calls have been replaced by bash built-ins There's no temporary file anymore which has to be written to a temporary directory, nginx_status page output is saved into a variable The plugin therefore runs much faster than my initial version of the plugin: 14-16ms plus the 1 second sleep interval between the two nginx_status checks. And then I realized that writing output ...

Tagged: gplv2, linux, nagios, network monitoring, nginx, open source, plugin, shell scripting, sysadmin
06.10.09

How to fix NetworkManager’s OpenVPN plugin in Ubuntu 9.04 Binary Talks | (3)
The OpenVPN plugin for Gnome's NetworkManager is somewhat broken, at least in various Ubuntu releases. Even with proper configuration it runs into an "NeedSecrets" error although the same command with the same configuration from shell via sudo work's just fine. But fear not mighty roadwarrior! Here's a fix to let the NetworkManager get back to work. Needless to say that this is just a temporary solution (a fix is in the making), but the only thing you have to do is to add an at_console policy to /etc/dbus-1/system.d/nm-openvpn-service.conf right between the two already existing policies. Then the file should look like the following: Afterwards ...

Tagged: gnome, launchpad, linux, network manager, open source, openvpn, plugin, sysadmin
06.09.09

Nagios Exchange opens up Binary Talks | (0)
Just a short note from my side: A week ago Ethan launched Nagios Exchange, an addon and plugin repository similar to MonitoringExchange, which is part of the whole Nagios website framework. I began to add all of my plugins to it as well, but due to the approval process it might take a while till they're downloadable. I'll let you know when it's done. Nevertheless, from now on you're even more free from where to download the plugins I've written. From now on they're available via this blog, via SVN, via MonitoringExchange and via Nagios Exchange. I'll update them on all sources.

Tagged: gplv2, monitoringexchange, nagios, nagios exchange, network monitoring, open source, plugin, sysadmin
06.03.09

Hadoop DFS Check Plugin for Nagios Binary Talks | (5)
Since I'm currently occupied with kicking off a several terabytes large Hadoop cluster I thought it'd be a good idea to provide a few Nagios plugins related to Hadoop. Just in case you don't know: Hadoop is a free Java software framework that supports data intensive distributed applications. It got its own filesystem called HDFS which scales up to petabytes of storage running on top of the operating system's filesystem. Hadoop is inspired by Google's MapReduce and GFS, the Google File System. Yahoo for example uses several Hadoop Clusters with 100.000 CPUs total in 20.000 boxes (2.000 boxes per cluster) according to ...

Tagged: google, gplv2, hadoop, HDFS, linux, nagios, network monitoring, open source, plugin, shell scripting, sysadmin, yahoo
06.02.09

PNP Template for Process Check Plugin Binary Talks | (0)
Just a short note: Here's the appropriate PNP Template to the process check plugin which I've recently written to create nice and shiny graphs: # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # ...

Tagged: linux, nagios, network monitoring, open source, plugin, pnp template, rrd, shell scripting, sysadmin
05.30.09

Process Check Plugin for Nagios Binary Talks | (10)
This is a sh-compliant check plugin for Nagios which enables you to monitor a specific process whether it's running or not and to see how much cpu/memory it's wasting. This can be accomplished with the check_procs plugin which is included in the official Nagios-Plugins package as well, but it doesn't generate any performance output. At least that's what I've experienced lately (I'd have written the plugin anyway for training purposes). The script No special needs, just the basic stuff. The script parses the output of ps aux in different ways. You need to provide a specific process via -p/--process, if warning/critical thresholds ...

Tagged: gplv2, linux, nagios, network monitoring, open source, plugin, shell scripting, sysadmin
05.24.09

nginx Check Plugin for Nagios Binary Talks | (1)
Update: Please also consider reading the article regarding Update 1.1 for check_nginx.sh. Ok, this was obvious. Here's a Nagios plugin I've just finished to check whether nginx is running and to get some performance data like requests and connections per second as well as requests per connection. Please note that the StubStatus module for nginx must be compiled into it, this isn't done by default! And please make sure that you've added a location directive to your nginx configuration like the following as well. The script must be able to access it! location /nginx_status { stub_status on; ...

Tagged: nagios, network monitoring, nginx, open source, performance, plugin, shell scripting, sysadmin, webserver
05.20.09

Update 1.3: Bind check plugin for Nagios Binary Talks | (2)
Thanks to Gareth's feedback and advice I fixed a small, but nerving bug which raised an error when the plugin was called on a Debian based distribution. The main problem here was, that the awk snippet failed because of an unescaped metacharacter when using mawk (Debian default awk alternative), but worked like a charm with gawk (Gentoo default). Apparently gawk is just more loose than mawk, it should've failed on both. Anyway, this shouldn't be a problem anymore. As always, the updated script is available at MonitoringExchange, or via svn. Please consider that the svn checkout is only possible via svnserve at ...

Tagged: awk, BIND, bugfix, dns, gplv2, linux, nagios, network monitoring, open source, plugin, shell scripting, sysadmin

« Previous Entries