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Re: [RFC] OpenLDAP automatic upgrade



On Tue, Mar 15, 2005 at 01:36:17AM +0100, Torsten Landschoff wrote:
> As you might have noticed or not we are working on getting OpenLDAP 2.2
> into unstable. The packages are mostly working fine (as available in
> experimental) but what is missing is a really tested upgrade path from
> OpenLDAP 2.0 (in stable) and 2.1 (in testing, unstable).

Ambitious target!

I upgraded my employer's LDAP servers from 2.1 to 2.2 last week. They
are running on Debian machines, but not using the Debian packages. Here
are some points which you might find useful:

* Fix/check the DB_CONFIG file if you're using BDB. Having a suboptimal
  DB_CONFIG will really really slow down the slapadd.

* There are syntax changes in slapd.conf, e.g. group.regex becomes
  group.expand, and there are new facilities which are potentially
  desirable to add, e.g. checkpoints. Also ACL parsing is stricter.

* Strip out the entryCSN attributes from the ldif file and let slapadd
  recreate them in the 2.2 format. That's necessary for using syncrepl
  in the future and it might as well be done while you're tearing the
  database to pieces.

* The monitor back-end behaves a little differently in 2.2 to previous
  versions, so monitoring scripts need tweaking to continue to work.

All in all, it's not a difficult upgrade, but there a lot of little
things to get right.

Dave

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