OpenLDAP Server in container

Step by Step Installation and Configuration OpenLDAP Server

By Ganesh (ganesh35@gmail.com)

Software: OS-Cent OS 4.4, openldap 2.2.13-6.4E
System name: ldap.adminmart.com
Domain name: adminmart.com
System IP: 192.168.1.212

Note: Use your domain name and IP instead of adminmart

Create container with OpenLDAP

Create a container with the following settings:

• ctid: 212
• IP address: 192.168.1.212
• name: ldap
• hostname: ldap

Run these commands on the hardware node:

   vzctl create 212 --ostemplate centos-4-i386-minimal
   vzctl set 212 --ipadd 192.168.1.212 --save
   vzctl set 212 --nameserver 202.88.156.6 --save
   vzctl set 212 --onboot yes --save
   vzctl set 212 --userpasswd root:changeme --save
   vzctl set 212 --name ldap --save
   vzctl set 212 --hostname ldap --save
   vzctl start 212
   vzyum 212 install *openldap* -y

Configuration of OpenLDAP Server

Easy steps for adding users: 1. Create unix user
2. Create unix user's ldap passwd file
3. Convert passwd.file to ldif file
4. Add ldap file to LDAP Directory using ldapadd

Step #1. Requirements

compat-openldap.i386 0:2.1.30-6.4E
openldap-clients.i386 0:2.2.13-6.4E
openldap-devel.i386 0:2.2.13-6.4E
openldap-servers.i386 0:2.2.13-6.4E
openldap-servers-sql.i386 0:2.2.13-6.4E


You can install them using the command:

   yum install *openldap* -y 

Step #2. Start the service

   [root@ldap ~]# chkconfig --levels 235 ldap on

   [root@ldap ~]# service ldap start 

Step #3. Create LDAP root user password

   [root@ldap ~]# slappasswd

   New password:

   Re-enter new password:

   {SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW

   [root@ldap ~]#

Step #4. Update /etc/openldap/slapd.conf for the root password

   [root@ldap ~]# vi /etc/openldap/slapd.conf

   #68 database bdb

   #69 suffix "dc=adminmart,dc=com"

   #70 rootdn "cn=Manager,dc=adminmart,dc=com"

   #71 rootpw {SSHA}cWB1VzxDXZLf6F4pwvyNvApBQ8G/DltW

Step #5. Apply Changes

   [root@ldap ~]# service ldap restart

Step #6. Create test users

   [root@ldap ~]# useradd test1

   [root@ldap ~]# passwd test1

   Changing password for user test1.

   New UNIX password:

   Retype new UNIX password:

   passwd: all authentication tokens updated successfully.

   [root@ldap ~]# useradd test2

   [root@ldap ~]# passwd test2

   Changing password for user test2.

   New UNIX password:

   Retype new UNIX password:

   passwd: all authentication tokens updated successfully.

   [root@ldap ~]#

   

Note: Repeat the same for the rest of users

Step #7. Migrate local users to LDAP

   [root@ldap ~]# grep root /etc/passwd > /etc/openldap/passwd.root

   [root@ldap ~]# grep test1 /etc/passwd > /etc/openldap/passwd.test1

   [root@ldap ~]# grep test2 /etc/passwd > /etc/openldap/passwd.test2

Note: Repeat the same for the rest of users

Step #8. Update default settings on file /usr/share/openldap/migration/migrate_common.ph

   #71 $DEFAULT_MAIL_DOMAIN = "adminmart.com";

   #74 $DEFAULT_BASE = "dc=adminmart,dc=com";

Step #9. Convert passwd.file to ldif (LDAP Data Interchange Format) file

   [root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.root /etc/openldap/root.ldif

   [root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.test1 /etc/openldap/test1.ldif

   [root@ldap ~]# /usr/share/openldap/migration/migrate_passwd.pl /etc/openldap/passwd.test2 /etc/openldap/test2.ldif

Note: Repeat the same for the rest of users

Step #10. Update root.ldif file for the "Manager" of LDAP Server

   [root@ldap ~]# vi /etc/openldap/root.ldif

   #1 dn: uid=root,ou=People,dc=adminmart,dc=com

   #2 uid: root

   #3 cn: Manager

   #4 objectClass: account

Step #11. Create a domain ldif file (/etc/openldap/adminmart.com.ldif)

   [root@ldap ~]# cat /etc/openldap/adminmart.com.ldif

   dn: dc=adminmart,dc=com

   dc: adminmart

   description: LDAP Admin

   objectClass: dcObject

   objectClass: organizationalUnit

   ou: rootobject

   

   dn: ou=People, dc=adminmart,dc=com

   ou: People

   description: Users of adminmart

   objectClass: organizationalUnit

Step #12. Import all users in to the LDAP

Add the Domain ldif file

   [root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f /etc/openldap/adminmart.com.ldif

   Enter LDAP Password:

   adding new entry "dc=adminmart,dc=com"

   adding new entry "ou=People, dc=adminmart,dc=com"

   [root@ldap ~]#

Add the Users

   [root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f /etc/openldap/root.ldif

   Enter LDAP Password:

   adding new entry "uid=root,ou=People,dc=adminmart,dc=com"

   adding new entry "uid=operator,ou=People,dc=adminmart,dc=com"

   [root@ldap ~]#

   

   [root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f /etc/openldap/test1.ldif

   Enter LDAP Password:

   adding new entry "uid=test1,ou=People,dc=adminmart,dc=com"

   [root@ldap ~]#

   

   [root@ldap ~]# ldapadd -x -D "cn=Manager,dc=adminmart,dc=com" -W -f /etc/openldap/test2.ldif

   Enter LDAP Password:

   adding new entry "uid=test2,ou=People,dc=adminmart,dc=com"

   [root@ldap ~]#

Note: Repeat the same for the rest of users

Step #13. Apply Changes

   [root@ldap ~]# service ldap restart 

Step #14. Test LDAP Server

It prints all the user information

   [root@ldap ~]# ldapsearch -x -b 'dc=adminmart,dc=com' '(objectclass=*)' 

LDAP Client Configuration

   [root@ldapclient ~]# authconfig 

[*] Use LDAP [*] Use LDAP Authentication

[Both should be checked]

[ ] Use TLS
Server: ldap.adminmart.com
Base DN: dc=adminmart,dc=com