Install MariaDB on replica server

Install the same MariaDB server package that Abiquo API server is using on the replica server.

1. On the replica server, Install your abiquo-release package

2. Install MariaDB with this command

   yum -y install MariaDB-server MariaDB-client

Configure DB replication on the main DB server

1. On the main DB server, create the replication configuration file

   cat <<EOF >/etc/my.cnf.d/replication.cnf [server] log-basename=master log-bin binlog-format=row server_id=1 EOF

    

2. Restart the mysql service

   service mysql restart

    

3. Create a replicator user and grant it replication permissions by executing the query below on DB prompt. Replace REPLICA_USER, REPLICA_PASS, and REPLICA_SERVER with values for your environment.
   
   

Configure DB replication on replica DB server

1. Create the replication configuration file in Maria DB replica server.

2. Restart the mysql service.

Perform initial replication

To perform the initial replication, get the current status of the main DB, including the file and the current position in the log, and then perform a dump of the database with the following steps

1. Open a new session on the main DB server at the mysql prompt

2. Run the following commands to get the file and current position

3. Leave this session open and don’t make any changes until replication is completed.

4. On the MariaDB main server, open another session and dump the kinton and kinton_accounting databases using --single-transaction option

Configure slave replication point

1. Copy dump.sql from the previous step from the main DB server to the replica DB server.

2. When the copy finishes, import it into replica DB server. If this is a new installation you may need to create the kinton databases.

3. When the import finishes, configure replica DB server replication. On the replica DB server, go to the mysql prompt and run the change master command below

   1. Replace MAIN_SERVER, REPLICA_USER and REPLICA_PASS.

   2. Replace MASTER_LOG_FILE and MASTER_LOG_POS from the show master status above

      For example, using the values from above of  master-bin.000001 and  3712878

4. On the replica server, at the mysql prompt, start replica DB replication

    

5. To check replication status, run the following command on the replica DB

   When Slave_IO_State is Waiting for master to send event, replication is finished

6. Release locks by closing the first session on master DB server where locks were set and the master status was requested, and you are done!

References

https://mariadb.com/kb/en/setting-up-replication/