Backup MySQL Amazon RDS

Question

I am trying to setup Replica outside of AWS and master is running at AWS RDS. And I do not want any downtime at my master. So I setup my slave node and now I want to backup my c

Answer 1

Thanks Michael, I think the most correct solution and the recommended by AWS is do the replication using a read replica as a source as explained here.

Having a RDS master, RDS read replica and an instance with MySQL ready, the steps to get an external slave are:

1. On master, increase binlog retention period.

mysql> CALL mysql.rds_set_configuration('binlog retention hours', 12);

2. On read replica stop replication to avoid changes during the backup.

mysql> CALL mysql.rds_stop_replication;

3. On read replica annotate the binlog status (Master_Log_File and Read_Master_Log_Pos)

mysql> SHOW SLAVE STATUS;

4. On server instance do a backup and import it (Using mydumper as suggested by Max can speed up the process).

mysqldump -h RDS_READ_REPLICA_IP -u root -p YOUR_DATABASE > backup.sql

mysql -u root -p YOUR_DATABASE < backup.sql

5. On server instance set it as slave of RDS master.

mysql> CHANGE MASTER TO MASTER_HOST='RDS_MASTER_IP',MASTER_USER='myrepladmin', MASTER_PASSWORD='pass', MASTER_LOG_FILE='mysql-bin-changelog.313534', MASTER_LOG_POS=1097;

Relace MASTER_LOG_FILE and MASTER_LOG_POS to the values of Master_Log_File Read_Master_Log_Pos you saved before, also you need an user in RDS master to be used by slave replication.

mysql> START SLAVE;

6. On server instance check if replication was success.

mysql> SHOW SLAVE STATUS;

7. On RDS read replica resume replication. mysql> CALL mysql.rds_start_replication;