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Re: Updating a private schema (cn=config)?

Andrzej Jan Taramina wrote:
I need to update one of our internal LDAP schemas, but am not sure of the
best process to use. Haven't managed to find 
any info on this, especially using the newer cn=config configuration
stuff.
Using the latest Ubuntu Intrepid OpenLDAP 
version (2.4.11)

I've tried deleting the schema, but keep getting a "server won't allow"
error. Deleting all my LDAP entries doesn't help 
that. It seems that once you have a schema defined you can't delete it
using
a GUI tool like Luma nor using LDIF 
directives with OpenLDAP running.

Do I just shut down my LDAP server, and delete the entry in the cn=config 
directory, then re-install the new schema version?

This was just discussed on -technical as well. You can delete individual schema elements using ldapmodify. You cannot delete entire cn=config entries (using ldapdelete). There are no plans to change this behavior for schema in the future.

What about any entries that depend on the schema? Will they be 
affected...

The answer is "it depends"...

In general, once you start using a schema, you're stuck with it. (Which is one reason why ldapdelete for schema entries will never be implemented.) You can fine tune individual elements of it (alter definitions, add/remove definitions), but there are issues that are still being worked on.
See ITS#5540 for one of the problems still in progress.

that is, do I need to delete them all and
re-add them? I guess if I knew when a schema is actually used (eg. only at
add/modify times....or are there links to 
from the entries that are used at other times?) it would help?
Thanks for the advice...


--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/