************************************************************

yum install -y epel-release wget telnet openldap* gcc
cd /etc/openldap/slapd.d/cn=config
mv olcDatabase={2}hdb.ldif olcDatabase={2}mdb.ldif

[root@ip-172-31-22-18 cn=config]# cat olcDatabase={2}mdb.ldif
# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.
# CRC32 b0e4f2c3
dn: olcDatabase={2}mdb
objectClass: olcDatabaseConfig
objectClass: olcMdbConfig
olcDatabase: {2}mdb
olcDbDirectory: /var/lib/ldap
olcSuffix: dc=my-domain,dc=com
olcRootDN: cn=Manager,dc=my-domain,dc=com
olcDbIndex: objectClass eq,pres
olcDbIndex: ou,cn,mail,surname,givenname eq,pres,sub
structuralObjectClass: olcMdbConfig
entryUUID: a60911f8-ad82-103e-9717-5f9aab981680
creatorsName: cn=config
createTimestamp: 20240523190147Z
entryCSN: 20240523190147.402664Z#000000#000#000000
modifiersName: cn=config
modifyTimestamp: 20240523190147Z

************************************************************

systemctl start slapd
systemctl enable slapd
systemctl status slapd
systemctl stop slapd
slappasswd

************************************************************

db.ldif
dn: olcDatabase={2}mdb,cn=config
changetype: modify
replace: olcSuffix
olcSuffix: dc=hadoop,dc=com

dn: olcDatabase={2}mdb,cn=config
changetype: modify
replace: olcRootDN
olcRootDN: cn=ldapadm,dc=hadoop,dc=com

dn: olcDatabase={2}mdb,cn=config
changetype: modify
replace: olcRootPW
olcRootPW: {SSHA}dAWI0nM3m7JIJ65FxxXVuXwj/0nw6EL1

************************************************************

ldapmodify -Y EXTERNAL -H ldapi:/// -f db.ldif

************************************************************

monitor.ldif
dn: olcDatabase={1}monitor,cn=config
changetype: modify
replace: olcAccess
olcAccess: {0}to * by dn.base="gidNumber=0+uidNumber=0,cn=peercred,cn=external, cn=auth" read by dn.base="cn=ldapadm,dc=hadoop,dc=com" read by * none

************************************************************

ldapmodify  -Y EXTERNAL -H ldapi:/// -f monitor.ldif

************************************************************

cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG
chown ldap:ldap /var/lib/ldap/*
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/cosine.ldif
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/nis.ldif
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/inetorgperson.ldif

************************************************************
base.ldif
dn: dc=hadoop,dc=com
dc: hadoop
objectClass: top
objectClass: domain

dn: cn=ldapadm,dc=hadoop,dc=com
objectClass: organizationalRole
cn: ldapadm
description: LDAP Manager

dn: ou=People,dc=hadoop,dc=com
objectClass: organizationalUnit
ou: People

dn: ou=Group,dc=hadoop,dc=com
objectClass: organizationalUnit
ou: Group

************************************************************

ldapadd -x -W -D "cn=ldapadm,dc=hadoop,dc=com" -f base.ldif
ldapsearch -D cn="ldapadm,dc=hadoop,dc=com" -W -b "dc=hadoop,dc=com" objectClass=*
slapcat
slaptest

************************************************************

***upgrading from openldap to symas openldap
2.4.57: symas openldap
systemctl stop slapd
yum -y erase openldap-clients openldap-servers
wget -q https://repo.symas.com/configs/SOFL/rhel7/sofl.repo -O /etc/yum.repos.d/sofl.repo
yum -y update
yum -y install symas-openldap-clients symas-openldap-servers
systemctl start slapd

************************************************************

***Upgrading  from symasopenldap2.4.57 to 2.6.7
1. cd /etc/openldap/slapd.d
2. slapcat -n0 -l slapd24-config.ldif
3. cp slapd24-config.ldif slapd26-config.ldif
4. mkdir -p /opt/symas/etc/openldap/slapd.d
5. [root@ip-172-31-22-18 slapd.d]# slapadd -n 0 -l slapd26-config.ldif -F /opt/symas/etc/openldap/slapd.d
_#################### 100.00% eta   none elapsed            none fast!
Closing DB...

6. systemctl stop slapd

7. 2.6.7 upgrade steps:
wget -q https://repo.symas.com/configs/SOLDAP/rhel7/release26.repo -O /etc/yum.repos.d/soldap-release26.repo
yum -y update
yum -y install symas-openldap-clients symas-openldap-servers

8. systemctl start slapd

************************************************************

ERRORS:
May 23 19:16:35 ip-172-31-22-18 slapd[5686]: @(#) $OpenLDAP: slapd 2.6.7 (Feb 20 2024 21:46:25) $
                                                     mockbuild@b3a03545f9ad461ea955953b9cd64253:/builddir/build/BUILD/openldap-2.6.7/servers/slapd
May 23 19:16:35 ip-172-31-22-18 slapd[5686]: UNKNOWN attributeDescription "OLCDBINDEX" inserted.
May 23 19:16:35 ip-172-31-22-18 slapd[5686]: config error processing olcDatabase={2}mdb,cn=config:

************************************************************

[root@ip-172-31-22-18 sbin]# /opt/symas/sbin/slaptest
UNKNOWN attributeDescription "OLCDBINDEX" inserted.
config error processing olcDatabase={2}mdb,cn=config:
slaptest: bad configuration file!

************************************************************

[root@ip-172-31-22-18 sbin]# /opt/symas/sbin/slapcat
UNKNOWN attributeDescription "OLCDBINDEX" inserted.
config error processing olcDatabase={2}mdb,cn=config:
slapcat: bad configuration file!

************************************************************

[root@ip-172-31-22-18 bin]# /opt/symas/bin/ldapsearch -V
ldapsearch: @(#) $OpenLDAP: ldapsearch 2.6.7 (Feb 20 2024 21:45:56) $
    mockbuild@b3a03545f9ad461ea955953b9cd64253:/builddir/build/BUILD/openldap-2.6.7/clients/tools
    (LDAP library: OpenLDAP 20607)
ldap_sasl_interactive_bind: Can't contact LDAP server (-1)

************************************************************

***PS: I am not using slapd.conf, what should I do in this case.