+ <div class="entry">
+ <div class="title"><a href="http://people.skolelinux.org/pere/blog/Idea_for_a_change_to_LDAP_schemas_allowing_DNS_and_DHCP_info_to_be_combined_into_one_object.html">Idea for a change to LDAP schemas allowing DNS and DHCP info to be combined into one object</a></div>
+ <div class="date">2010-06-24 00:35</div>
+ <div class="body">
+<p>A while back, I
+<a href="http://people.skolelinux.org/pere/blog/Time_for_new__LDAP_schemas_replacing_RFC_2307_.html">complained
+about the fact</a> that it is not possible with the provided schemas
+for storing DNS and DHCP information in LDAP to combine the two sets
+of information into one LDAP object representing a computer.</p>
+
+<p>In the mean time, I discovered that a simple fix would be to make
+the dhcpHost object class auxiliary, to allow it to be combined with
+the dNSDomain object class, and thus forming one object for one
+computer when storing both DHCP and DNS information in LDAP.</p>
+
+<p>If I understand this correctly, it is not safe to do this change
+without also changing the assigned number for the object class, and I
+do not know enough about LDAP schema design to do that properly for
+Debian Edu.</p>
+
+<p>Anyway, for future reference, this is how I believe we could change
+the
+<a href="http://tools.ietf.org/html/draft-ietf-dhc-ldap-schema-00">DHCP
+schema</a> to solve at least part of the problem with the LDAP schemas
+available today from IETF.</p>
+
+<pre>
+--- dhcp.schema (revision 65192)
++++ dhcp.schema (working copy)
+@@ -376,7 +376,7 @@
+ objectclass ( 2.16.840.1.113719.1.203.6.6
+ NAME 'dhcpHost'
+ DESC 'This represents information about a particular client'
+- SUP top
++ SUP top AUXILIARY
+ MUST cn
+ MAY (dhcpLeaseDN $ dhcpHWAddress $ dhcpOptionsDN $ dhcpStatements $ dhcpComments $ dhcpOption)
+ X-NDS_CONTAINMENT ('dhcpService' 'dhcpSubnet' 'dhcpGroup') )
+</pre>
+
+<p>I very much welcome clues on how to do this properly for Debian
+Edu/Squeeze. We provide the DHCP schema in our debian-edu-config
+package, and should thus be free to rewrite it as we see fit.</p>
+</div>
+ <div class="tags">
+
+
+
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <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>.
+
+ </div>
+ </div>
+ <div class="padding"></div>
+
<div class="entry">
<div class="title"><a href="http://people.skolelinux.org/pere/blog/Calling_tasksel_like_the_installer__while_still_getting_useful_output.html">Calling tasksel like the installer, while still getting useful output</a></div>
<div class="date">2010-06-16 14:55</div>
</div>
<div class="padding"></div>
- <div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_computer_hardware_models_used_at_site.html">Sitesummary tip: Listing computer hardware models used at site</a></div>
- <div class="date">2010-06-03 12:05</div>
- <div class="body">
-<p>When using sitesummary at a site to track machines, it is possible
-to get a list of the machine types in use thanks to the DMI
-information extracted from each machine. The script to do so is
-included in the sitesummary package, and here is example output from
-the Skolelinux build servers:</p>
-
-<blockquote><pre>
-maintainer:~# /usr/lib/sitesummary/hardware-model-summary
- vendor count
- Dell Computer Corporation 1
- PowerEdge 1750 1
- IBM 1
- eserver xSeries 345 -[8670M1X]- 1
- Intel 2
- [no-dmi-info] 3
-maintainer:~#
-</pre></blockquote>
-
-<p>The quality of the report depend on the quality of the DMI tables
-provided in each machine. Here there are Intel machines without model
-information listed with Intel as vendor and mo model, and virtual Xen
-machines listed as [no-dmi-info]. One can add -l as a command line
-option to list the individual machines.</p>
-
-<p>A larger list is
-<a href="http://narvikskolen.no/sitesummary/">available from the the
-city of Narvik</a>, which uses Skolelinux on all their shools and also
-provide the basic sitesummary report publicly. In their report there
-are ~1400 machines. I know they use both Ubuntu and Skolelinux on
-their machines, and as sitesummary is available in both distributions,
-it is trivial to get all of them to report to the same central
-collector.</p>
-</div>
- <div class="tags">
-
-
-
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <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/sitesummary">sitesummary</a>.
-
- </div>
- </div>
- <div class="padding"></div>
-
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