Configuration of LDAP Directory (OpenLDAP)

This section describes how to do a very basic setup of OpenLDAP for CentOS. Also see public sources like [Set up OpenLDAP on CentOS].

First, a password hash needs to be generated for the directory server's root account using the OpenLDAP password utility ("slappasswd"). This value is required to edit the main configuration file:

vi /etc/openldap/slapd.d/cn\=config/olcDatabase\=\{2\}bdb.ldif

Perform the following steps.

1. Add/Modify the following entries to look like this:

   olcRootDN: cn=Manager,dc=imagemaster,dc=de

   olcRootPW: {SSHA}A/G+9x34BXnh1lWgDkjli7e94txcV22j

   olcSuffix: dc=imagemaster,dc=de

   Be sure to set the value for olcRootPW to the value slappasswd printed out. For this walkthrough use dc=imagemaster, dc=de as the root to everything.

2. Create the root node:

   [root@vm ~]# cat imagemaster.ldif

   dn: dc=imagemaster,dc=de

   objectClass: dcObject

   objectClass: organization

   dc: imagemaster

   o: imagemaster

   [root@vm ~]# ldapadd -f imagemaster.ldif -D cn=Manager,dc=imagemaster,dc=de -w geheim

3. Check if it works:

   [root@vm ~]# ldapsearch -x -LLL -b dc=imagemaster,dc=de

   dn: dc=imagemaster,dc=de

   objectClass: dcObject

   objectClass: organization

   dc: imagemaster

   o: imagemaster

4. As we are preparing a system for testing purposes only, deactivate the firewall (permanently):

   [root@vm ~]# yum install system-config-firewall-tui

   [root@vm ~]# system-config-firewall-tui

   The configuration program will (on the first screen) ask if the firewall shall be enabled. Just say no and the configuration terminates.

5. Create Organizational Unit (OU) node for users:

   [root@vm ~]# cat users.ldif

   dn: ou=Users,dc=imagemaster,dc=de

   objectClass: organizationalUnit

   ou: Users

    

   [root@vm ~]# ldapadd -f users.ldif -D cn=Manager,dc=imagemaster,dc=de -w geheim

   adding new entry "ou=Users,dc=imagemaster,dc=de"

6. Check that it works:

   [root@vm ~]# ldapsearch -x -LLL -b dc=imagemaster,dc=de objectClass=organizationalUnit

   dn: ou=Users,dc=imagemaster,dc=de

   objectClass: organizationalUnit

   ou: Users

7. Create a user:

   [root@vm ~]# slappasswd -s foobar

   {SSHA}tjAF77hIE1Ovzo6lEa4U/PdbI6QGbtf/

    

   [root@vm ~]# cat eric.ldif

   dn: cn=Hagbard_Celine,ou=Users,dc=imagemaster,dc=de

   cn: Hagbard Celine

   sn: Celine

   objectClass: inetOrgPerson

   objectClass: imageMasterUser

   userPassword: {SSHA}tjAF77hIE1Ovzo6lEa4U/PdbI6QGbtf/

   uid: hagbard

   imageMasterRole: tenant1 powerUser

   This user has access to ImageMaster (tenant with name "tenant1") and will get the role "powerUser" on login.

   [root@vm ~]# ldapadd -f eric.ldif -D cn=Manager,dc=imagemaster,dc=de -w geheim

   adding new entry "cn=Hagbard_Celine,ou=Users,dc=imagemaster,dc=de"

Now the configuration is ready.

Example properties for MS Active Directory