OpenLDAP Replication
2015/11/01 |
Configure OpenLDAP Replication to continue Directory service if OpenLDAP master server would be down.
OpenLDAP master server is called "Provider" and OpenLDAP Slave server is called "Consumer" on OpenLDAP.
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[1] | |
[2] | Configure LDAP Provider. Add syncprov module. |
root@dlp:~#
vi mod_syncprov.ldif # create new dn: cn=module,cn=config objectClass: olcModuleList cn: module olcModulePath: /usr/lib/ldap 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={1}hdb,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={1}hdb,cn=config" |
[3] | Configure LDAP Consumer. |
root@slave:~#
vi syncrepl.ldif # create new dn: olcDatabase={1}hdb,cn=config changetype: modify add: olcSyncRepl olcSyncRepl: rid=001 # LDAP server's URI provider=ldap://10.0.0.30:389/ bindmethod=simple # own domain name binddn="cn=admin,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 ldapadd -Y EXTERNAL -H ldapi:/// -f syncrepl.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 modifying entry "olcDatabase={1}hdb,cn=config" # confirm settings to search datas root@slave:~# ldapsearch -x -b 'ou=people,dc=srv,dc=world' # people, srv.world dn: ou=people,dc=srv,dc=world objectClass: organizationalUnit ou: people ... ... |
[4] | Configure LDAP Client to bind LDAP Consumer, too. |
root@www:~#
vi /etc/ldap.conf # line 30: add LDAP Consumer uri ldap://dlp.srv.world/ ldap://slave.srv.world/
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