The sssd daemon, maintained by the SSSD Project, is a spinoff from the FreeIPA Project and provides a modern take on venerable daemons such as debops.nslcd, debops.nscd and unscd(1). It is used to look up user, group or other information stored in a number of different databases, such as LDAP, Kerberos, FreeIPA, Active Directory, etc. It is needed if you want to use the posixAccount and posixGroup LDAP objects to authenticate to UNIX-like hosts.

The debops.sssd Ansible role can be used to configure the sssd service on a host and, via debops.ldap role, create a bind account in the LDAP directory used by sssd to perform LDAP lookups.