Open Source Cloud Authors: Zakia Bouachraoui, Elizabeth White, Liz McMillan, Pat Romanski, Yeshim Deniz

Related Topics: Open Source Cloud

Open Source Cloud: Article

How to Create a Directory Service Using the OpenLDAP Directory Server

A directory service is an application that stores, retrieves, and modifies information about network resources

A directory service is an application(s) that stores, retrieves, and modifies information about network resources such as network users. The actual data is stored in a database; a database service is an abstract layer on top of the database. The Lightweight Directory Access Protocol (LDAP) is a lightweight protocol for accessing directory services. LDAP is based on entries; an entry is a set of attributes identified by a globally unique Distinguished Name (DN). Each of a directory entry's attributes has a type and one or more values. The attributes in a directory entry's distinguished name(DN) are arranged in a hierarchy from right to left with the rightmost attribute as the top entry and with the leftmost attribute(s) that are unique to its level called a Relative Distinguished Name (RDN). A DN is a sequence of RDNs. Some examples of attribute types are discussed in Table 1.

An entry in a directory is identified by a distinguished name (DN). An example of a directory entry's distinguished name is:


In the example DN, the base entry/root is "dc=example,dc=com." The relative distinguished name is "cn=dvohra." LDAP defines operations for adding, searching, modifying, and deleting directory entries. An LDAP server is required to provide a LDAP directory service. OpenLDAP is an open source software package that includes a LDAP directory server (slapd). OpenLDAP is built on top of the Berkeley DB, an embedded database. In this article we'll create a directory service using the OpenLDAP directory server.

Installing OpenLDAP
Download OpenLDAP for Windows. Double-click on the OpenLDAP application openldap-2.2.29-db-4.3.29-openssl-0.9.8a-BDB_ONLY-win32_Setup.exe. The OpenLDAP setup wizard gets started as shown in Figure 1. Click on the Next button.

Accept the license agreement and click on the Next button. Select the default destination, C:\Program Files\OpenLDAP and click on the Next button. Select components BDB-tools and OpenLDAP-slapd as NT service and click on Next as shown in Figure 2.

Specify a Start Menu folder and click on Next. Select additional tasks such as "automatically start OpenLDAP NT service after reboot" and "Create a desktop item" and click on Next. Click on the Install button to install OpenLDAP as shown in Figure 3.

Configuring OpenLDAP
The configuration for a slapd server is specified in the slapd.conf configuration file. Configuration information comes in three types: global, back-end and database. The configuration information is specified with directives; the global directives precede the back-end directives that precede the database directives.

The global directives apply to all back-ends and database types. Some of the commonly used global directives are discussed in Table 2

Back-end directives specify a back-end and apply to all database instances in a back-end. The commonly used back-end directive is as follows:

backend <type>

The back-end directive specifies a back-end declaration. Some of the back-end types are bdb (Berkeley DB transactional back-end) and sql (SQL programmable back-end).

Database directives specify information about a database instance. Some of the commonly used database directives are discussed in Table 3.

Next, we'll modify the directives in the slapd.conf file in the C:\Program Files\OpenLDAP directory of the OpenLDAP server we installed earlier. The database directive is already set to bdb for the Berkeley DB database. Set the suffix, rootdn, and rootpw as shown in following listing:

database      bdb
suffix      "dc=example,dc=com"
rootdn      "cn=Manager,dc=example,dc=com"
rootpw      openldap
directory      ./data

Creating a Directory
Next, we'll create a directory in the OpenLDAP LDAP server. For example, create a directory of JDeveloper developers. LDAP entries are represented in the LDAP Data Interchange Format (LDIF) in an .ldif format. The format of an entry in n LDIF file is as follows:

dn: <distinguished name>
<attrdesc>: <attrvalue>
<attrdesc>: <attrvalue>

Create a jdevDir.ldif file for a directory of JDeveloper developers. A root/base DN was specified in the slapd.conf file with the suffix directive:

suffix      "dc=example,dc=com"

In the .ldif file add an entry for the base DN. Each directory entry is identified with a dn attribute. The objectClass attributes specify the type of data, and required and optional attributes in an entry. Object classes form a class hierarchy and some of the commonly used object classes are top, organization, and organizationalPerson. The object classes that may be specified in a directory entry and the attributes that may be specified or have to be specified for an object class are listed in the C:\Program Files\OpenLDAP\schema\core.schema file:

dn: dc=example,dc=com
objectClass: top
objectClass: dcObject
objectClass: organization
dc :example
o: Oracle

Next, add an entry for an organizational unit called jdeveloper under dc=example, dc=com. Directory entries in an LDIF file are separated with a blank line.

   dn: ou=jdeveloper, dc=example, dc=com
objectClass: organizationalUnit
ou: jdeveloper

More Stories By Deepak Vohra

Deepak Vohra is a Sun Certified Java 1.4 Programmer and a Web developer.

More Stories By Ajay Vohra

Ajay Vohra is a senior solutions architect with DataSynapse Inc.

Comments (2)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.

IoT & Smart Cities Stories
Moroccanoil®, the global leader in oil-infused beauty, is thrilled to announce the NEW Moroccanoil Color Depositing Masks, a collection of dual-benefit hair masks that deposit pure pigments while providing the treatment benefits of a deep conditioning mask. The collection consists of seven curated shades for commitment-free, beautifully-colored hair that looks and feels healthy.
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
We all love the many benefits of natural plant oils, used as a deap treatment before shampooing, at home or at the beach, but is there an all-in-one solution for everyday intensive nutrition and modern styling?I am passionate about the benefits of natural extracts with tried-and-tested results, which I have used to develop my own brand (lemon for its acid ph, wheat germ for its fortifying action…). I wanted a product which combined caring and styling effects, and which could be used after shampo...
The platform combines the strengths of Singtel's extensive, intelligent network capabilities with Microsoft's cloud expertise to create a unique solution that sets new standards for IoT applications," said Mr Diomedes Kastanis, Head of IoT at Singtel. "Our solution provides speed, transparency and flexibility, paving the way for a more pervasive use of IoT to accelerate enterprises' digitalisation efforts. AI-powered intelligent connectivity over Microsoft Azure will be the fastest connected pat...
There are many examples of disruption in consumer space – Uber disrupting the cab industry, Airbnb disrupting the hospitality industry and so on; but have you wondered who is disrupting support and operations? AISERA helps make businesses and customers successful by offering consumer-like user experience for support and operations. We have built the world’s first AI-driven IT / HR / Cloud / Customer Support and Operations solution.
Codete accelerates their clients growth through technological expertise and experience. Codite team works with organizations to meet the challenges that digitalization presents. Their clients include digital start-ups as well as established enterprises in the IT industry. To stay competitive in a highly innovative IT industry, strong R&D departments and bold spin-off initiatives is a must. Codete Data Science and Software Architects teams help corporate clients to stay up to date with the mod...
At CloudEXPO Silicon Valley, June 24-26, 2019, Digital Transformation (DX) is a major focus with expanded DevOpsSUMMIT and FinTechEXPO programs within the DXWorldEXPO agenda. Successful transformation requires a laser focus on being data-driven and on using all the tools available that enable transformation if they plan to survive over the long term. A total of 88% of Fortune 500 companies from a generation ago are now out of business. Only 12% still survive. Similar percentages are found throug...
Druva is the global leader in Cloud Data Protection and Management, delivering the industry's first data management-as-a-service solution that aggregates data from endpoints, servers and cloud applications and leverages the public cloud to offer a single pane of glass to enable data protection, governance and intelligence-dramatically increasing the availability and visibility of business critical information, while reducing the risk, cost and complexity of managing and protecting it. Druva's...
BMC has unmatched experience in IT management, supporting 92 of the Forbes Global 100, and earning recognition as an ITSM Gartner Magic Quadrant Leader for five years running. Our solutions offer speed, agility, and efficiency to tackle business challenges in the areas of service management, automation, operations, and the mainframe.