How to chage the ServerID in MMR setup.

How to change the ServerID in MMR setup

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Problem:

In MMR setup both ldap not in sync due to ServerID are same for the both servers.

[zimbra@ldap2 ~]$ /opt/zimbra/libexec/zmreplchk
Master: ldap://master2.domain.com:389 ServerID: 2 Code: 6 Status: 0y 0M 0w 0d 0h 0m 31 CSNs:
20221013134129.954789Z#000000#001#000000
Master: ldap://master1.domain.com:389ServerID: 2 Code: 6 Status: 0y 0M 0w 0d 0h 0m 31 CSNs:
20200909225502.112266Z#000000#002#000000
[zimbra@ldap1 ~]$ /opt/zimbra/libexec/zmreplchk
Master: ldap://master1.domain.com:389  ServerID: 2 Code: 6 Status: 0y 0M 0w 0d 0h 0m 31s behind CSNs:
20221013134129.954789Z#000000#001#000000
Master: ldap://master2.domain.com:389 ServerID: 2 Code: 6 Status: 0y 0M 0w 0d 0h 0m 31s behind CSNs:
20200909225502.112266Z#000000#002#000000

Solution:

Need to manually change the for parameter olcserverid and reimport the config.back file to make the id different.

Step 1: Take the backup of main database and configuration database manually from LDAP1.

/opt/zimbra/libexec/zmslapcat /tmp
/opt/zimbra/libexec/zmslapcat -c /tmp

Step 2: Make the change in "/opt/zimbra/data/ldap/config/cn=config.ldif" file, Set different ID (1) for the olcserverid parameter.

Step 3: Reimport the configuration database and main database on LDAP1 server.

cd /opt/zimbra/data/ldap
mv mdb mdb.old
mv config config.bak
mkdir -p mdb/db 
mkdir config  
/opt/zimbra/libexec/zmslapadd -c /tmp/ldap-config.bak
/opt/zimbra/libexec/zmslapadd /tmp/ldap.bak
mv accesslog accesslog.old                #On both Master LDAP server
mkdir -p accesslog/db                     #On both Matesr LDAP server 

Step 4: Restart the services.

zmcontrol restart

Step 5: Now again check both ladps are in sync.

[zimbra@ldap2 ~]$ /opt/zimbra/libexec/zmreplchk
Master: ldap://master1.domain.com:389 ServerID: 1 Code: 0 Status: In Sync CSNs:
20221013134129.954789Z#000000#001#000000
20200909225502.112266Z#000000#002#000000
Master: ldap://master2.domain.com:389 ServerID: 2 Code: 0 Status: In Sync CSNs:
20221013134129.954789Z#000000#001#000000
20200909225502.112266Z#000000#002#000000
[zimbra@ldap1 ~]$ /opt/zimbra/libexec/zmreplchk
Master: ldap://master1.domain.com:389 ServerID: 1 Code: 0 Status: In Sync CSNs:
20221013134129.954789Z#000000#001#000000
20200909225502.112266Z#000000#002#000000
Master: ldap://master2.domain.com:389 ServerID: 2 Code: 0 Status: In Sync CSNs:
20221013134129.954789Z#000000#001#000000
20200909225502.112266Z#000000#002#000000

Submitted by: Aditya Shrivastava