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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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
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  21
  22     <div class="entry">
  23       <div class="title">Automatic Munin and Nagios configuration</div>
  24       <div class="date">27th January 2010</div>
  25       <div class="body"><p>One of the new features in the next Debian/Lenny based release of
  26 Debian Edu/Skolelinux, which is scheduled for release in the next few
  27 days, is automatic configuration of the service monitoring system
  28 Nagios.  The previous release had automatic configuration of trend
  29 analysis using Munin, and this Lenny based release take that a step
  30 further.</p>
  31
  32 <p>When installing a Debian Edu Main-server, it is automatically
  33 configured as a Munin and Nagios server.  In addition, it is
  34 configured to be a server for the
  35 <a href="http://wiki.debian.org/DebianEdu/HowTo/SiteSummary">SiteSummary
  36 system</a> I have written for use in Debian Edu.  The SiteSummary
  37 system is inspired by a system used by the University of Oslo where I
  38 work.  In short, the system provide a centralised collector of
  39 information about the computers on the network, and a client on each
  40 computer submitting information to this collector.  This allow for
  41 automatic information on which packages are installed on each machine,
  42 which kernel the machines are using, what kind of configuration the
  43 packages got etc.  This also allow us to automatically generate Munin
  44 and Nagios configuration.</p>
  45
  46 <p>All computers reporting to the sitesummary collector with the
  47 munin-node package installed is automatically enabled as a Munin
  48 client and graphs from the statistics collected from that machine show
  49 up automatically on http://www/munin/ on the Main-server.</p>
  50
  51 <p>All non-laptop computers reporting to the sitesummary collector are
  52 automatically monitored for network presence (ping and any network
  53 services detected).  In addition, all computers (also laptops) with
  54 the nagios-nrpe-server package installed and configured the way
  55 sitesummary would configure it, are monitored for full disks, software
  56 raid status, swap free and other checks that need to run locally on
  57 the machine.</p>
  58
  59 <p>The result is that the administrator on a school using Debian Edu
  60 based on Lenny will be able to check the health of his installation
  61 with one look at the Nagios settings, without having to spend any time
  62 keeping the Nagios configuration up-to-date.</p>
  63
  64 <p>The only configuration one need to do to get Nagios up and running
  65 is to set the password used to get access via HTTP.  The system
  66 administrator need to run "<tt>htpasswd /etc/nagios3/htpasswd.users
  67 nagiosadmin</tt>" to create a nagiosadmin user and set a password for
  68 it to be able to log into the Nagios web pages.  After that,
  69 everything is taken care of.</p>
  70 </div>
  71
  72       <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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