blog/Automatic_Munin_and_Nagios_configuration.html

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   6     <title>Petter Reinholdtsen: Automatic Munin and Nagios configuration</title>
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  12  <h1>
  13      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  14
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  17 </div>
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  20     <div class="entry">
  21       <div class="title">Automatic Munin and Nagios configuration</div>
  22       <div class="date">27th January 2010</div>
  23       <div class="body"><p>One of the new features in the next Debian/Lenny based release of
  24 Debian Edu/Skolelinux, which is scheduled for release in the next few
  25 days, is automatic configuration of the service monitoring system
  26 Nagios.  The previous release had automatic configuration of trend
  27 analysis using Munin, and this Lenny based release take that a step
  28 further.</p>
  29
  30 <p>When installing a Debian Edu Main-server, it is automatically
  31 configured as a Munin and Nagios server.  In addition, it is
  32 configured to be a server for the
  33 <a href="http://wiki.debian.org/DebianEdu/HowTo/SiteSummary">SiteSummary
  34 system</a> I have written for use in Debian Edu.  The SiteSummary
  35 system is inspired by a system used by the University of Oslo where I
  36 work.  In short, the system provide a centralised collector of
  37 information about the computers on the network, and a client on each
  38 computer submitting information to this collector.  This allow for
  39 automatic information on which packages are installed on each machine,
  40 which kernel the machines are using, what kind of configuration the
  41 packages got etc.  This also allow us to automatically generate Munin
  42 and Nagios configuration.</p>
  43
  44 <p>All computers reporting to the sitesummary collector with the
  45 munin-node package installed is automatically enabled as a Munin
  46 client and graphs from the statistics collected from that machine show
  47 up automatically on http://www/munin/ on the Main-server.</p>
  48
  49 <p>All non-laptop computers reporting to the sitesummary collector are
  50 automatically monitored for network presence (ping and any network
  51 services detected).  In addition, all computers (also laptops) with
  52 the nagios-nrpe-server package installed and configured the way
  53 sitesummary would configure it, are monitored for full disks, software
  54 raid status, swap free and other checks that need to run locally on
  55 the machine.</p>
  56
  57 <p>The result is that the administrator on a school using Debian Edu
  58 based on Lenny will be able to check the health of his installation
  59 with one look at the Nagios settings, without having to spend any time
  60 keeping the Nagios configuration up-to-date.</p>
  61
  62 <p>The only configuration one need to do to get Nagios up and running
  63 is to set the password used to get access via HTTP.  The system
  64 administrator need to run "<tt>htpasswd /etc/nagios3/htpasswd.users
  65 nagiosadmin</tt>" to create a nagiosadmin user and set a password for
  66 it to be able to log into the Nagios web pages.  After that,
  67 everything is taken care of.</p>
  68 </div>
  69
  70       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary</a>.</div>
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