OpenLDAP database backend migration script

This bash script migrate an OpenLDAP database from HDB/BDB to MDB format.

Warning : Don't be stupid. You MUST test and backup your data and configuration before run this...

This script have been tested on Debian 10 (buster).

This script :

• check needed dependencies
• load MDB module
• works directly on a copy of /etc/ldap/slapd.d to made needed changes to cn=config :
  • remove obsolete attributes
  • add olcDbMaxSize
  • remove old backend modules
  • rebuild CRC values with https://gogs.zionetrix.net/bn8/check_slapdd_crc32
• stop OpenLDAP
• dump all OpenLDAP data with slapcat
• delete OpenLDAP data file
• replace OpenLDAP cn=config with new one
• import data with slapadd
• start OpenLDAP

Some code & tips from : https://wiki.zionetrix.net/informatique:reseau:ldap:migration_bdb_hdb_mdb So we publish this script with same License.