X-Git-Url: https://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/90c126ec61b6fdcf11a04b64d7128f6ce7361282..05aa68a4a08d73f5538bd589b2f950af12bd1989:/blog/index.rss?ds=sidebyside diff --git a/blog/index.rss b/blog/index.rss index 15d13cbd14..92983f7a04 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -6,6 +6,54 @@ http://people.skolelinux.org/pere/blog/ + + Idea for a change to LDAP schemas allowing DNS and DHCP info to be combined into one object + 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 + 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 + Thu, 24 Jun 2010 00:35:00 +0200 + +<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> + + + Calling tasksel like the installer, while still getting useful output http://people.skolelinux.org/pere/blog/Calling_tasksel_like_the_installer__while_still_getting_useful_output.html @@ -615,46 +663,5 @@ following the standards wars of today.</p> - - Sitesummary tip: Listing computer hardware models used at site - http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_computer_hardware_models_used_at_site.html - http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_computer_hardware_models_used_at_site.html - Thu, 3 Jun 2010 12:05:00 +0200 - -<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> - - -