OpenLDAP : Multi-Master Replication2021/08/05 |
Configure OpenLDAP Multi-Master Replication.
For the Settings of Provider/Consumer, Consumer Hosts are read only servers, however if configure Multi-Master Settings, it's possbile to add data on any Master servers. |
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[1] | |
[2] | Configureon [syncprov] module on all servers. |
[root@dlp ~]#
vi mod_syncprov.ldif # create new dn: cn=module,cn=config objectClass: olcModuleList cn: module olcModulePath: /usr/lib64/openldap olcModuleLoad: syncprov.la ldapadd -Y EXTERNAL -H ldapi:/// -f mod_syncprov.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=module,cn=config"
[root@dlp ~]#
vi syncprov.ldif # create new dn: olcOverlay=syncprov,olcDatabase={2}mdb,cn=config objectClass: olcOverlayConfig objectClass: olcSyncProvConfig olcOverlay: syncprov olcSpSessionLog: 100 ldapadd -Y EXTERNAL -H ldapi:/// -f syncprov.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "olcOverlay=syncprov,olcDatabase={2}mdb,cn=config" |
[3] | Configure Multi-Master settings on all servers. For parameters [olcServerID] and [provider=***], specify uniq value on each server. |
[root@dlp ~]#
vi master01.ldif # create new dn: cn=config changetype: modify replace: olcServerID # specify uniq ID number on each server olcServerID: 100 dn: olcDatabase={2}mdb,cn=config changetype: modify add: olcSyncRepl olcSyncRepl: rid=001 # specify another LDAP server's URI provider=ldap://10.0.0.52:389/ bindmethod=simple # domain name suffix binddn="cn=Manager,dc=srv,dc=world" # directory manager's password credentials=password searchbase="dc=srv,dc=world" # includes subtree scope=sub schemachecking=on type=refreshAndPersist # [retry interval] [retry times] [interval of re-retry] [re-retry times] retry="30 5 300 3" # replication interval interval=00:00:05:00 - add: olcMirrorMode olcMirrorMode: TRUE dn: olcOverlay=syncprov,olcDatabase={2}mdb,cn=config changetype: add objectClass: olcOverlayConfig objectClass: olcSyncProvConfig olcOverlay: syncprov ldapmodify -Y EXTERNAL -H ldapi:/// -f master01.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 modifying entry "cn=config" modifying entry "olcDatabase={2}mdb,cn=config" adding new entry "olcOverlay=syncprov,olcDatabase={2}mdb,cn=config" |
[4] | Configure LDAP Client to bind all LDAP server. |
[root@client ~]#
vi /etc/openldap/ldap.conf # add additional LDAP server URI ldap://dlp.srv.world/ ldap://node02.srv.world/
[root@client ~]#
vi /etc/sssd/sssd.conf # add additional LDAP server ldap_uri = ldap://dlp.srv.world/ ,ldap://node02.srv.world/
systemctl restart sssd
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