ZCS Multi-Server Installation Guide 8.0

Open Source Edition

Promote Existing Replicas to Multi-Master LDAP Servers

In an existing ZCS setup where there is already a single master and multiple replicas, you can promote an existing replica to become a secondary master.

1.	On the master LDAP server find the LDAP replication, Postfix, Amavis, and NGINX passwords

zmlocalconfig -s | grep passw | grep ldap

2.	Change theLDAP passwords on the server you are promoting to be the same as the first master LDAP server.

•	LDAP replication password = zmldappasswd -l <password>

•	LDAP postfix password = zmldappasswd -p <password>

•	LDAP amavis password = zmldappasswd -a <password>

•	LDAP NGINX password = zmldappasswd -n <password>

3.	Assign the next Server ID to this master. This example is 3

/opt/zimbra/libexec/zmldappromote-replica-mmr -s 3

4.	Update the ldap_master_url attribute to add the master to the list.

zmlocalconfig -e ldap_master_url="ldap://<<master1.example.com>>:389 ldap://<<master2.example.com>>:389 ldap://<<master3.example.com>>:389"

This updates the replica to be a multi-master replica, enabled with a server ID. It is automatically configured to be a paired master with the master it was previously replicating from.