The nslcd daemon, part of the nss-pam-ldapd software package, is used to look up user, group or other information stored in LDAP that is related to UNIX accounts or groups. It is needed if you want to use the posixAccount and posixGroup LDAP objects to authenticate to the UNIX-like hosts.

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