HOWTO : OpenLDAP NFS NetGroup Repository for AutoFS

We continue our OpenLDAP 2.4 series with goal number 7. Recall that our goals are :

1. Install OpenLDAP 2.4.
2. Configure Transport Layer Security (TLS).
3. Manage users and groups in OpenLDAP.
4. Configure pam_ldap to authenticate users via OpenLDAP.
5. Use OpenLDAP as sudo's configuration repository.
6. Use OpenLDAP as automount map repository for autofs.
7. Use OpenLDAP as NFS netgroup repository again for autofs.
8. Use OpenLDAP as the Kerberos principal repository.
9. Setup OpenLDAP backup and recovery.
10. Setup OpenLDAP replication.

In this document, we will learn how to setup our OpenLDAP 2.4 server as a repository of NFS netgroup configuration. Then we will configure an NFS client to see if our netgroup configuration actually works. A netgroup is a set of (host, user, domain) tuples that are to be given similar network access.