CentOS 6
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MySQL Replication
2015/03/22
 
Configure MySQL Replication settings. This configuration is general Master-Slave settings.
[1] Change settings and create a user for replication on MySQL Matser Host.
[root@www ~]#
vi /etc/my.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs

log-bin=mysql-bin
# define uniq server ID

server-id=101
[root@www ~]#
/etc/rc.d/init.d/mysqld restart 

Stopping mysqld:  [  OK  ]
Starting mysqld:  [  OK  ]
[root@www ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
# create user (set any password for 'password' section)

mysql>
grant replication slave on *.* to replica@'%' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
mysql>
flush privileges;

Query OK, 0 rows affected (0.00 sec)
mysql>
exit

Bye
[2]
Install and start MySQL Server on Slave Host, refer to here.
[3] If IPTables is running on Master Host, allow ports like follows.
But if Slave Host has also read accesses, allow service on Slave Host, too, like follows.
[root@www ~]#
iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
[4] Change settings on Slave Host.
[root@repl01 ~]#
vi /etc/my.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs

log-bin=mysql-bin
# define server ID (different one from Master Host)

server-id=102
# read only

read_only=1
# define own hostname

report-host=repl01.srv.world
[root@repl01 ~]#
/etc/rc.d/init.d/mysqld restart 

Stopping mysqld:  [  OK  ]
Starting mysqld:  [  OK  ]
[5] Get Dump-Data on Master Host.
[root@www ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
# lock all tables

mysql>
flush tables with read lock;

Query OK, 0 rows affected (0.00 sec)
# show status (remember File, Position value)

mysql>
show master status; 

+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |      539 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
# remain the window above and open the another window and execute dump

[root@www ~]#
mysqldump -u root -p --all-databases --lock-all-tables --events > mysql_dump.sql

Enter password:
# back to the remained window and unlock

mysql>
unlock tables;

Query OK, 0 rows affected (0.00 sec)
mysql>
exit

Bye
# transfer the dump to Slave Host

[root@www ~]#
scp mysql_dump.sql repl01.srv.world:/tmp/

root@repl01.srv.world's password:
mysql_dump.sql 100% 515KB 514.7KB/s 00:00
[6] Configure replication settings on Slave Host.
It's OK all, make sure the settings work normally to create databases on Master Host.
# import dump from Master Host

[root@repl01 ~]#
mysql -u root -p < /tmp/mysql_dump.sql

Enter password:
[root@repl01 ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
change master to

    ->
master_host='10.0.0.31',
   
# Master Hosts's IP

    ->
master_user='replica',
   
# replication ID

    ->
master_password='password',
   
# replication ID's password

    ->
master_log_file='mysql-bin.000001',
   
# File value confirmed on Master

    ->
master_log_pos=539;
   
# Position value confirmed on Master

Query OK, 0 rows affected (0.58 sec)
# start replication

mysql>
start slave;

Query OK, 0 rows affected (0.00 sec)
# show status

mysql>
show slave status\G

*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.0.0.31
                  Master_User: replica
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 610
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 322
        Relay_Master_Log_File: mysql-bin.000001
             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: 610
              Relay_Log_Space: 478
              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:
1 row in set (0.00 sec)
 
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