Configure LDAP Server2013/05/10

	Configure LDAP Server in order to share users' accounts among local networks.
[1]	Install openldap

root@master:~#

vi /etc/hosts

127.0.0.1       localhost

# add own hostname

10.0.0.100      master.srv.world master

root@master:~#

aptitude -y install slapd ldap-utils

# Input LDAP admin password during installation

# check working

root@master:~#

slapcat

dn: dc=srv,dc=world
objectClass: top
objectClass: dcObject
objectClass: organization
o: srv.world
dc: srv
structuralObjectClass: organization
entryUUID: c038265c-4daa-1032-800f-5185668abe1a
creatorsName: cn=admin,dc=srv,dc=world
createTimestamp: 20130510104727Z
entryCSN: 20130510104727.521711Z#000000#000#000000
modifiersName: cn=admin,dc=srv,dc=world
modifyTimestamp: 20130510104727Z

dn: cn=admin,dc=srv,dc=world
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
description: LDAP administrator
userPassword:: e1NTSEF9RWpVcWFUT0xCSHhyTnB3UTg3UmdNOFNLYUF3Y25SY2Q=
structuralObjectClass: organizationalRole
entryUUID: c0385b72-4daa-1032-8010-5185668abe1a
creatorsName: cn=admin,dc=srv,dc=world
createTimestamp: 20130510104727Z
entryCSN: 20130510104727.523074Z#000000#000#000000
modifiersName: cn=admin,dc=srv,dc=world
modifyTimestamp: 20130510104727Z

[2]	Add new directory

root@master:~#

vi base.ldif

# create new

# change to your own suffix for the field 'dc=srv,dc=world'

dn: ou=people,dc=srv,dc=world
objectClass: organizationalUnit
ou: people

dn: ou=groups,dc=srv,dc=world
objectClass: organizationalUnit
ou: groups

root@master:~#

ldapadd -x -D cn=admin,dc=srv,dc=world -W -f base.ldif

Enter LDAP Password:

# LDAP admin password (set in installation of openldap)

adding new entry "ou=people,dc=srv,dc=world"

adding new entry "ou=groups,dc=srv,dc=world"

[3]	Add existing local users to LDAP directory

root@master:~#

vi ldapuser.sh

# extract local users who have 4-digit UID

# this is an example

#!/bin/bash

SUFFIX='dc=srv,dc=world'
LDIF='ldapuser.ldif'

echo -n > $LDIF
for line in `grep "x:[1-9][0-9][0-9][0-9]:" /etc/passwd | sed -e "s/ /%/g"`
do
    UID1=`echo $line | cut -d: -f1`
    NAME=`echo $line | cut -d: -f5 | cut -d, -f1`
    if [ ! "$NAME" ]
    then
        NAME=$UID1
    else
        NAME=`echo $NAME | sed -e "s/%/ /g"`
    fi
    SN=`echo $NAME | awk '{print $2}'`
    if [ ! "$SN" ]
    then
        SN=$NAME
    fi
    GIVEN=`echo $NAME | awk '{print $1}'`
    UID2=`echo $line | cut -d: -f3`
    GID=`echo $line | cut -d: -f4`
    PASS=`grep $UID1: /etc/shadow | cut -d: -f2`
    SHELL=`echo $line | cut -d: -f7`
    HOME=`echo $line | cut -d: -f6`
    EXPIRE=`passwd -S $UID1 | awk '{print $7}'`
    FLAG=`grep $UID1: /etc/shadow | cut -d: -f9`
    if [ ! "$FLAG" ]
    then
        FLAG="0"
    fi
    WARN=`passwd -S $UID1 | awk '{print $6}'`
    MIN=`passwd -S $UID1 | awk '{print $4}'`
    MAX=`passwd -S $UID1 | awk '{print $5}'`
    LAST=`grep $UID1: /etc/shadow | cut -d: -f3`

    echo "dn: uid=$UID1,ou=people,$SUFFIX" >> $LDIF
    echo "objectClass: inetOrgPerson" >> $LDIF
    echo "objectClass: posixAccount" >> $LDIF
    echo "objectClass: shadowAccount" >> $LDIF
    echo "uid: $UID1" >> $LDIF
    echo "sn: $SN" >> $LDIF
    echo "givenName: $GIVEN" >> $LDIF
    echo "cn: $NAME" >> $LDIF
    echo "displayName: $NAME" >> $LDIF
    echo "uidNumber: $UID2" >> $LDIF
    echo "gidNumber: $GID" >> $LDIF
    echo "userPassword: {crypt}$PASS" >> $LDIF
    echo "gecos: $NAME" >> $LDIF
    echo "loginShell: $SHELL" >> $LDIF
    echo "homeDirectory: $HOME" >> $LDIF
    echo "shadowExpire: $EXPIRE" >> $LDIF
    echo "shadowFlag: $FLAG" >> $LDIF
    echo "shadowWarning: $WARN" >> $LDIF
    echo "shadowMin: $MIN" >> $LDIF
    echo "shadowMax: $MAX" >> $LDIF
    echo "shadowLastChange: $LAST" >> $LDIF
    echo >> $LDIF
done

root@master:~#

sh ldapuser.sh

root@master:~#

ldapadd -x -D cn=admin,dc=srv,dc=world -W -f ldapuser.ldif

Enter LDAP Password:

# admin password

adding new entry "uid=ringtail,ou=people,dc=srv,dc=world"

adding new entry "uid=ubuntu,ou=people,dc=srv,dc=world"

adding new entry "uid=fedora,ou=people,dc=srv,dc=world"

adding new entry "uid=cent,ou=people,dc=srv,dc=world"

[4]	Add existing local groups to LDAP directory

root@master:~#

vi ldapgroup.sh

# extract local groups who have 4-digit UID

# this is an example

#!/bin/bash

SUFFIX='dc=srv,dc=world'
LDIF='ldapgroup.ldif'

echo -n > $LDIF
for line in `grep "x:[1-9][0-9][0-9][0-9]:" /etc/group`
do
    CN=`echo $line | cut -d: -f1`
    GID=`echo $line | cut -d: -f3`
    echo "dn: cn=$CN,ou=groups,$SUFFIX" >> $LDIF
    echo "objectClass: posixGroup" >> $LDIF
    echo "cn: $CN" >> $LDIF
    echo "gidNumber: $GID" >> $LDIF
    users=`echo $line | cut -d: -f4 | sed "s/,/ /g"`
    for user in ${users} ; do
        echo "memberUid: ${user}" >> $LDIF
    done
    echo >> $LDIF
done

root@master:~#

sh ldapgroup.sh

root@master:~#

ldapadd -x -D cn=admin,dc=srv,dc=world -W -f ldapgroup.ldif

Enter LDAP Password:

# admin password

adding new entry "cn=ringtail,ou=groups,dc=srv,dc=world"

adding new entry "cn=ubuntu,ou=groups,dc=srv,dc=world"

adding new entry "cn=fedora,ou=groups,dc=srv,dc=world"

adding new entry "cn=cent,ou=groups,dc=srv,dc=world"

[5]	If you'd like to delete User or Group in LDAP, Do as below.

root@master:~#

ldapdelete -x -W -D 'cn=admin,dc=srv,dc=world' "uid=ubuntu,ou=people,dc=srv,dc=world"

Enter LDAP Password:
root@master:~#

ldapdelete -x -W -D 'cn=admin,dc=srv,dc=world' "cn=ubuntu,ou=groups,dc=srv,dc=world"

Enter LDAP Password:

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