[Kolab-devel] Extending Kolab

[Gunnar Wrobel]

Bernhard Reiter <bernhard at intevation.de> writes:

> On Friday 02 May 2008 14:51, Gunnar Wrobel wrote:
>> >>  > We could think about defining a "playground" OID subtree, if there is
>> >> none > in the OID scheme already. (Does something know out of the top of
>> >> their head?) > Before this I would want to document the use of Kolab's
>> >> privat OIDs. > I have already the start
>> >>  > http://wiki.kolab.org/index.php/Directory_Service_Schema
>> >>
>> >>  Is there any specific reason for having new OIDs for such
>> >>  configuration variables? This seems extremely cumbersome as it always
>> >>  requires a schema change for any application we might wish to
>> >>  configure over the LDAP tree.
>
> "extremely cumbersome" is not the right attribute ... as Alain correctly 
> points out
>
>> > Extend the LDAP schema is very easy, just add your new attributes in
>> > the schema file and restart ldap. 
>
>> I was thinking of adding new attributes in the Kolab schema that gets
>> delivered with the default distribution. Meaning changes within Kolab
>> CVS and this takes more effort. For local hacks this is of course
>> easy.
>  
> Adding and changing attributes too lightly is a call for trouble, especially 
> in upgrade situations. So a little resistance is good. And a little it is.
> If the bar is to high at the moment, we could lower it by a set of 
> instructions and we might consider a playground subtree of the Kolab OIDs.
>
> The whole idea of LDAP is to be able to control the variables and their 
> contents. So if you have a changed or new OID, yes you should do a new number
> and put up a real definition of the type and semantics. The rules out implicit 
> definitions, but again I believe this is a good thing when being consistantly
> in LDAP. Overal I think LDAP and is overdesigned, but the abuse would add to 
> the complexity from my point of view, making it worse.

When speaking with Thomas Börnert last week I realized that I was not
really precise on what I meant here.

The generic LDAP attribute was meant to be only added to the special
"k=kolab" object.

Something like this:

diff -r 7ef19097e3c6 server/kolabd/kolabd/kolab2.schema
--- a/server/kolabd/kolabd/kolab2.schema        Thu May 08 13:05:18 2008 +0200
+++ b/server/kolabd/kolabd/kolab2.schema        Wed Jun 04 07:35:28 2008 +0200
@@ -539,6 +539,15 @@
   NAME 'proftpd-userPassword'
   SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
 
+######################################################
+# generic Kolab setting                              #
+######################################################
+
+attributetype ( 1.3.6.1.4.1.19414.2.1.904
+  NAME 'kolabParameter'
+  DESC 'A generic setting for configuring Kolab. Syntax is x=y.'
+  SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
+
 ########################
 # kolab object classes #
 ########################
@@ -580,6 +589,7 @@
         proftpd-defaultquota $
         kolabFreeBusyFuture $
         kolabFreeBusyPast $
+       kolabParameter $
         uid $
         userPassword ) )


In terms of LDAp "k=kolab" is a pretty special object anyhow as it
basically groups a set of configuration settings that do not really
form a precise object.

Cheers,

Gunnar

>
> Bernhard
>
>
>
> -- 
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E-mail : p at rdus.de                                 Dr. Gunnar Wrobel
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