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   6     <title>Petter Reinholdtsen: Idea for a change to LDAP schemas allowing DNS and DHCP info to be combined into one object</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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  22     <div class="entry">
  23       <div class="title">Idea for a change to LDAP schemas allowing DNS and DHCP info to be combined into one object</div>
  24       <div class="date">24th June 2010</div>
  25       <div class="body"><p>A while back, I
  26 <a href="http://people.skolelinux.org/pere/blog/Time_for_new__LDAP_schemas_replacing_RFC_2307_.html">complained
  27 about the fact</a> that it is not possible with the provided schemas
  28 for storing DNS and DHCP information in LDAP to combine the two sets
  29 of information into one LDAP object representing a computer.</p>
  30
  31 <p>In the mean time, I discovered that a simple fix would be to make
  32 the dhcpHost object class auxiliary, to allow it to be combined with
  33 the dNSDomain object class, and thus forming one object for one
  34 computer when storing both DHCP and DNS information in LDAP.</p>
  35
  36 <p>If I understand this correctly, it is not safe to do this change
  37 without also changing the assigned number for the object class, and I
  38 do not know enough about LDAP schema design to do that properly for
  39 Debian Edu.</p>
  40
  41 <p>Anyway, for future reference, this is how I believe we could change
  42 the
  43 <a href="http://tools.ietf.org/html/draft-ietf-dhc-ldap-schema-00">DHCP
  44 schema</a> to solve at least part of the problem with the LDAP schemas
  45 available today from IETF.</p>
  46
  47 <pre>
  48 --- dhcp.schema    (revision 65192)
  49 +++ dhcp.schema    (working copy)
  50 @@ -376,7 +376,7 @@
  51  objectclass ( 2.16.840.1.113719.1.203.6.6
  52         NAME 'dhcpHost'
  53         DESC 'This represents information about a particular client'
  54 -       SUP top
  55 +       SUP top AUXILIARY
  56         MUST cn
  57         MAY  (dhcpLeaseDN $ dhcpHWAddress $ dhcpOptionsDN $ dhcpStatements $ dhcpComments $ dhcpOption)
  58         X-NDS_CONTAINMENT ('dhcpService' 'dhcpSubnet' 'dhcpGroup') )
  59 </pre>
  60
  61 <p>I very much welcome clues on how to do this properly for Debian
  62 Edu/Squeeze.  We provide the DHCP schema in our debian-edu-config
  63 package, and should thus be free to rewrite it as we see fit.</p>
  64
  65 <p>If you want to help out with implementing this for Debian Edu,
  66 please contact us on debian-edu@lists.debian.org.</p>
  67 </div>
  68
  69       <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/ldap">ldap</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.</div>
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