slapo-memberof - Reverse Group Membership overlay to slapd
The memberof overlay to slapd(8) allows automatic
reverse group membership maintenance. Any time a group entry is modified,
its members are modified as appropriate in order to keep a DN-valued
"is member of" attribute updated with the DN of the group.
The config directives that are specific to the memberof
overlay must be prefixed by memberof-, to avoid potential conflicts
with directives specific to the underlying database or to other stacked
overlays.
- overlay
memberof
- This directive adds the memberof overlay to the current database; see
slapd.conf(5) for details.
The following slapd.conf configuration options are defined
for the memberof overlay.
- memberof-group-oc <group-oc>
- The value <group-oc> is the name of the objectClass that
triggers the reverse group membership update. It defaults to
groupOfNames.
- memberof-member-ad <member-ad>
- The value <member-ad> is the name of the attribute that
contains the names of the members in the group objects; it must be
DN-valued. It defaults to member.
- memberof-memberof-ad <memberof-ad>
- The value <memberof-ad> is the name of the attribute that
contains the names of the groups an entry is member of; it must be
DN-valued. Its contents are automatically updated by the overlay. It
defaults to memberOf.
- memberof-dn <dn>
- The value <dn> contains the DN that is used as
modifiersName for internal modifications performed to update the
reverse group membership. It defaults to the rootdn of the
underlying database.
- memberof-dangling
{ignore, drop, error}
- This option determines the behavior of the overlay when, during a
modification, it encounters dangling references. The default is
ignore, which may leave dangling references. Other options are
drop, which discards those modifications that would result in
dangling references, and error, which causes modifications that
would result in dangling references to fail.
- memberof-dangling-error <error-code>
- If memberof-dangling is set to error, this configuration
parameter can be used to modify the response code returned in case of
violation. It defaults to "constraint violation", but other
implementations are known to return "no such object" instead.
- memberof-refint
{true|FALSE}
- This option determines whether the overlay will try to preserve
referential integrity or not. If set to TRUE, when an entry
containing values of the "is member of" attribute is modified,
the corresponding groups are modified as well.
The memberof overlay may be used with any backend that provides
full read-write functionality, but it is mainly intended for use with local
storage backends. The maintenance operations it performs are internal to the
server on which the overlay is configured and are never replicated. Replica
servers should be configured with their own instances of the memberOf
overlay if it is desired to maintain these memberOf attributes on the
replicas.
- /etc/openldap/slapd.conf
- default slapd configuration file
slapd.conf(5), slapd-config(5), slapd(8). The
slapo-memberof(5) overlay supports dynamic configuration via
back-config.
This module was written in 2005 by Pierangelo Masarati for SysNet
s.n.c.