Ubuntu 12.04
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Configure LDAP Server
2012/05/09
 
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

127.0.1.1       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: dca957c0-2e16-1031-8dca-fb8c238ea817
creatorsName: cn=admin,dc=srv,dc=world
createTimestamp: 20120509113546Z
entryCSN: 20120509113546.006578Z#000000#000#000000
modifiersName: cn=admin,dc=srv,dc=world
modifyTimestamp: 20120509113546Z

dn: cn=admin,dc=srv,dc=world
objectClass: simpleSecurityObject
objectClass: organizationalRole
cn: admin
description: LDAP administrator
userPassword:: e1NTSEF9VDFtMjFLZVpqTkZjWFRmckE5Y01QM0pkUXFwSXdNOWg=
structuralObjectClass: organizationalRole
entryUUID: dcb4b048-2e16-1031-8dcb-fb8c238ea817
creatorsName: cn=admin,dc=srv,dc=world
createTimestamp: 20120509113546Z
entryCSN: 20120509113546.080941Z#000000#000#000000
modifiersName: cn=admin,dc=srv,dc=world
modifyTimestamp: 20120509113546Z
[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=pangolin,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=pangolin,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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