ZCS-10242 : Mariadb master-master setup

[umagmrit]

Mariadb master-master setup

Two example hostnames will be used throughout this process.
master1.example.com (Primary master) master2.example.com (Secondary master)

zmmysqlenable-mmr : Enable replication on both servers
zmmysqlstart-mmr : Start replication between both servers

Data to have before starting

The below data we should have for both mariadb servers before starting mariadb master-master setup
zimbra_mysql_password
mysql_replicator_password
mysql_port

Enable replication on both servers

• On both mariadb servers set below values

  zmlocalconfig -e maridb_master1="master1.example.com:7306"
zmlocalconfig -e maridb_master2="master2.example.com:7306"

• Run zmmysqlenable-mmr on both mariadb servers

  zmmysqlenable-mmr will do the following steps

1. Add the following to /opt/zimbra/conf/my.cnf

   server-id
   log_bin
   binlog_format
   remove bind-address entry
   

2. Create replication user

3. restart mysql

• Run zmmysqlstart-mmr on both mariadb servers

  zmmysqlstart-mmr will require zimbra_mysql_password , mysql_replicator_password

  zmmysqlstart-mmr will do the following steps

1.   Get inputs `zimbra_mysql_password` , `mysql_replicator_password` from user
   

2.   Get `MASTER_LOG_FILE` and `MASTER_LOG_POS`
   

3.   Stop Mysql Slave thread
   

4.   Set `MASTER_LOG_FILE` and `MASTER_LOG_POS`
   

5.   Star Mysql Slave thread