Work Smart, Not Hard
I wrote before about schema conversion to LDIF format and how to add schemas offline by uploading them to config/schema directory in OpenDJ. Now I will describe how to extend schema online, without restart LDAP server. Most if not all LDAP servers now have possibility to modify configuration and schemas due LDIF files and ldapmodify tool. Let’s prepare our LDIF file, attributes first:
# cat us-newattrs.ldifSometimes you need to combine two or more LDAP directories with same suffixes to one directory or you just need to have a proxy. My first attempts to combine two OpenLDAP directories was to make replication from two different sources. This solution however has some disadvantages. First of all: to have syncprov replication your environment must be uniform, this means all source servers and proxy needs to be OpenLDAP. Second: I observed that this is not so stable, because of mentioned earlier issues with OpenLDAP replication.
Sometimes you need to set some attributes as unique, for example: if LDAP contains system users, then uid attribute shouldn’t repeat in whole system.
OpenDJ is equipped with proper plugin, but it’s not enabled by default. In case of mail system, attribute mail should be unique. Here we don’t have ready to use plugin, but we can easily create it basing on UID Unique Attribute and this description and this one.
But I didn’t make this post to send you to other pages. I would like to show you how to add Plugin with dsconfig and how to copy it to replica with LDIF export/import.