MySQL Database Replication Setup

MASTER - Omegha-erp

SLAVE      - Omegha-bcp

Database Version -   MySQL 5.5

In the MASTER server

1. Enable binary logging

root@Omegha-erp:~#sudo vi /etc/mysql/my.cnf

---

[mysqld]

#log-bin=mysql-bin

log-bin=/var/log/mysql/mysql-bin.log

server-id=1

innodb_flush_log_at_trx_commit=1

sync_binlog=1

---

root@Omegha-erp:~#sudo /etc/init.d/mysql restart

2. Creation replication user account on the source database

mysql> CREATE USER 'repl'@'%' IDENTIFIED BY '*****';

mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';

3. Take backup and note the position for slave replication

mysql> flush tables with read lock;

mysql> show master status ;

+------------------+----------+--------------+------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000001 |      330 |              |                  |

+------------------+----------+--------------+------------------+

$ sudo mysqldump -uroot -p*** --all-databases --master-data > dbdump.db

unlock tables;

In the SLAVE server

4. Set unique server id

root@Omegha-bcp:~#sudo vi /etc/mysql/my.cnf

---

server-id               = 2

---

root@Omegha-bcp:~#sudo /etc/init.d/mysql restart

5. Transfer backup file from the Master to Slave server

root@Omegha-bcp:~#scp -i ~/.ssh/pub-key.pem ubuntu@xx.xx.xx.xx:dbdump.db .

6. Import data

root@Omegha-bcp:~#mysql -uroot -p*** < dbdump.db

7. Point to master

mysql> change master to master_host='xx.xx.xx.xx', master_user='repl', master_password='****', master_log_file='mysql-bin.000001', master_log_pos=330;

mysql> start slave;

mysql> show slave status \G

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: xx.xx.xx.xx

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000002

          Read_Master_Log_Pos: 267

               Relay_Log_File: mysqld-relay-bin.000004

                Relay_Log_Pos: 413

        Relay_Master_Log_File: mysql-bin.000002

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB:

          Replicate_Ignore_DB:

           Replicate_Do_Table:

       Replicate_Ignore_Table:

      Replicate_Wild_Do_Table:

  Replicate_Wild_Ignore_Table:

                   Last_Errno: 0

                   Last_Error:

                 Skip_Counter: 0

          Exec_Master_Log_Pos: 267

              Relay_Log_Space: 716

              Until_Condition: None

               Until_Log_File:

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File:

           Master_SSL_CA_Path:

              Master_SSL_Cert:

            Master_SSL_Cipher:

               Master_SSL_Key:

        Seconds_Behind_Master: 0

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error:

               Last_SQL_Errno: 0

               Last_SQL_Error:

  Replicate_Ignore_Server_Ids:

             Master_Server_Id: 1

1 row in set (0.01 sec)

mysql>

HAPPY LEARNING!