The /etc/openldap/schema/ directory
holds LDAP definitions, previously located in the slapd.at.conf and slapd.oc.conf files. The /etc/openldap/schema/redhat/ directory holds
customized schemas distributed by Red Hat for Red Hat Enterprise
Linux.
All attribute syntax definitions and
objectclass definitions are now located in
the different schema files. The various schema files are referenced
in /etc/openldap/slapd.conf using
include lines, as shown in this
example:
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/nis.schema
include /etc/openldap/schema/rfc822-MailMember.schema
include /etc/openldap/schema/redhat/autofs.schema
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Caution |
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Do not modify schema items defined in the schema files installed
by OpenLDAP.
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It is possible to extend the schema used by OpenLDAP to support
additional attribute types and object classes using the default
schema files as a guide. To do this, create a local.schema file in the /etc/openldap/schema/ directory. Reference this new
schema within slapd.conf by adding the
following line below the default include
schema lines:
include /etc/openldap/schema/local.schema
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Next, define new attribute types and object classes within the
local.schema file. Many organizations use
existing attribute types from the schema files installed by default
and add new object classes to the local.schema file.
Extending the schema to match certain specialized requirements
is quite involved and beyond the scope of this chapter. Refer to
https://www.openldap.org/doc/admin/schema.html for
information.
