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Reference: Cisco: Internetworking Basics
This guide demonstrates how to extract information from local OS user accounts and groups on the Linux platform and then export those users and objects to a readable LDIF file that can be modified (if necessary) and imported into an LDAP directory. This provides a nice shortcut for setting up users and groups in a newly initialized directory that can be used to authenticate through LDAP.
The Linux machine used in this example is running the latest version of Oracle which at the time of this writing is Oracle Database 11g Release 2 (126.96.36.199.0). The machine name for the database server is racnode1.idevelopment.info and contains user accounts and groups that best define the conventions that I would want to centralize for all Oracle database servers. The local user accounts and groups will be exported from the database server and imported to an LDAP directory on ldapsrv.idevelopment.info.
The example used in this tutorial is based on a clean installation of OpenLDAP Software on the CentOS 6 platform. This tutorial will also work for Red Hat Enterprise Linux 6 and Oracle Linux 6. The LDAP directory used in this guide has been initialized with a base DN of dc=idevelopment,dc=info and organization units People, Group, and Hosts. Obviously, the name of your LDAP server and the base DN will differ and the examples presented in this guide will need to be modified accordingly for you environment.
Refer to the following two tutorials on how to install OpenLDAP Software and initialize the LDAP directory on the server (ldapsrv.idevelopment.info in this guide) on the CentOS 6 platform.
The users and groups being migrated to LDAP are reflective of a typical Oracle RAC 11g Release 2 configuration that includes Oracle Grid Infrastructure and Oracle Database software.
In the end, we will also be able to create additional LDAP users based on a template LDIF record for a user and group developed in the migration phase of this guide.
Jeffrey Hunter is an Oracle Certified Professional, Java Development Certified Professional, Author, and an Oracle ACE. Jeff currently works as a Senior Database Administrator for The DBA Zone, Inc. located in Pittsburgh, Pennsylvania. His work includes advanced performance tuning, Java and PL/SQL programming, developing high availability solutions, capacity planning, database security, and physical / logical database design in a UNIX / Linux server environment. Jeff's other interests include mathematical encryption theory, tutoring advanced mathematics, programming language processors (compilers and interpreters) in Java and C, LDAP, writing web-based database administration tools, and of course Linux. He has been a Sr. Database Administrator and Software Engineer for over 20 years and maintains his own website site at: http://www.iDevelopment.info. Jeff graduated from Stanislaus State University in Turlock, California, with a Bachelor's degree in Computer Science and Mathematics.
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