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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>
20
21
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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464
465 <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
466
467 <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
468
469 <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
470
471 <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
472
473 </ul>
474
475
476 </div>
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