MYSQL架构之MySQL Dual-Master双向同步

MYSQL架构之MySQL Dual-Master双向同步

简介

  其实与Master-Slave同步方式并无太大的不同，只是双方相互为对方的主从服务器。并且可以扩展到多台服务器。如下图

搭建环境

操作系统： CentOS 6.4 64位

MySQL版本：5.1.50

MySQL（1）IP地址：192.168.100.60

MySQL（2）IP地址：192.168.100.61

 

MySQL安装

此步骤从略，确保两台测试机器的my.cnf相同，安装后能成功启动即可。

Replication配置

MySQL(1)配置

创建账号

mysql> grant replication slave on *.* to 'repl'@'192.168.100.61' identified by '123456';

Query OK, 0 rows affected (0.00 sec)

 

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

 

修改my.cnf

[mysqld]

user       = mysql

pid-file   = /var/run/mysqld/mysqld.pid

port            = 3306

socket          = /usr/local/mysql/tmp/mysql.sock

basedir    = /usr/local/mysql

datadir   = /data/dbdata

tmpdir   = /tmp

log-bin  = master-bin

log-bin-index   = master-bin.index

 

replicate-same-server-id = 0

auto_increment_increment = 2

auto_increment_offset = 1

 

relay-log = slave-relay-bin

relay-log-index = slave-relay-bin.index

 

server-id       = 1

 

重启mysqld

/etc/init.d/mysqld restart

查看二进制文件名与位置偏移值

mysql> show master status;

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

| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| master-bin.000003 |      106 |              |                  |

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

1 row in set (0.00 sec)

注意：

记录以上两个值，等会启动复制要用到

 

MySQL(2)配置

创建账号

mysql> grant replication slave on *.* to 'repl'@'192.168.100.60' identified by '123456';

Query OK, 0 rows affected (0.00 sec)

 

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

 

mysql>

 

修改my.cnf

 

[mysqld]

user       = mysql

pid-file   = /var/run/mysqld/mysqld.pid

port            = 3306

socket          = /usr/local/mysql/tmp/mysql.sock

basedir    = /usr/local/mysql

datadir   = /data/dbdata

tmpdir   = /tmp

relay-log = slave-relay-bin

relay-log-index = slave-relay-bin.index

 

replicate-same-server-id = 0

auto_increment_increment = 2

auto_increment_offset = 2

 

log-bin  = master-bin

log-bin-index   = master-bin.index

 

server-id       = 2

 

重启mysqld

/etc/init.d/mysqld restart

查看二进制文件名与位置偏移值

mysql> show master status;

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

| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| master-bin.000003 |      106 |              |                  |

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

1 row in set (0.00 sec)

注意：

记录以上两个值，等会启动复制要用到

启动MySQL(1) Replication

mysql> CHANGE MASTER TO

    -> MASTER_HOST = '192.168.100.61',

    -> MASTER_PORT = 3306,

    -> MASTER_USER = 'repl',

    -> MASTER_PASSWORD = '123456',

    -> MASTER_LOG_FILE = 'master-bin.000003',

    -> MASTER_LOG_POS = 106;

Query OK, 0 rows affected (0.18 sec)

 

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

 

查看slave状态

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.100.61

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: master-bin.000003

          Read_Master_Log_Pos: 106

               Relay_Log_File: slave-relay-bin.000002

                Relay_Log_Pos: 252

        Relay_Master_Log_File: master-bin.000003

             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: 106

              Relay_Log_Space: 407

              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)

 

启动启动MySQL(1)Replication

 

mysql> change master to

    -> MASTER_HOST = '192.168.100.60',

    -> MASTER_PORT = 3306,

    -> MASTER_USER = 'repl',

    -> MASTER_PASSWORD = '123456',

    -> MASTER_LOG_FILE = 'master-bin.000003',

    -> MASTER_LOG_POS = 106;

Query OK, 0 rows affected (0.11 sec)

 

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

查看slave状态

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.100.60

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: master-bin.000003

          Read_Master_Log_Pos: 106

               Relay_Log_File: slave-relay-bin.000002

                Relay_Log_Pos: 252

        Relay_Master_Log_File: master-bin.000003

             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: 106

              Relay_Log_Space: 407

              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)

 

 

 

 

 

 

 

 

 

 

 

 

 

[mysqld]

user       = mysql

pid-file   = /var/run/mysqld/mysqld.pid

port            = 3306

socket          = /usr/local/mysql/tmp/mysql.sock

basedir    = /usr/local/mysql

datadir   = /data/dbdata

tmpdir   = /tmp

relay-log = slave-relay-bin

relay-log-index = slave-relay-bin.index

 

replicate-same-server-id = 0

auto_increment_increment = 2

auto_increment_offset = 1

 

log-bin  = master-bin

log-bin-index   = master-bin.index

 

Replication测试

MySQL(1)

示例：在MySQL(1)服务器创建example库

mysql> create database example;

Query OK, 1 row affected (0.00 sec)

 

mysql> show databases;

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

| Database           |

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

| information_schema |

| example            |

| mysql              |

| test               |

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

4 rows in set (0.00 sec)

 

查看MySQL(2)

mysql> show databases;

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

| Database           |

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

| information_schema |

| example            |

| mysql              |

| test               |

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

4 rows in set (0.00 sec)

 

MySQL(2)

示例：在MySQL(2)服务器创建example1库

 

mysql> create database example1;

Query OK, 1 row affected (0.00 sec)

mysql> show databases;

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

| Database           |

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

| information_schema |

| example            |

| example1           |

| mysql              |

| test               |

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

5 rows in set (0.00 sec)

 

查看MySQL(1)

mysql> show databases;

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

| Database           |

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

| information_schema |

| example            |

| example1           |

| mysql              |

| test               |

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

5 rows in set (0.00 sec)

 

测试成功