mysql 互为主备的简单搭建

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192.168.190.128《====》192.168.190.129
master----》slave
slave《----master

1.在master 128 上配置my.cnf文件，添加下列参数：
server-id=1
log-bin=mysql-bin
log-salve-updates
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1

重新启动mysql
[root@calvin1 ~]# /etc/init.d/mysqld start
Starting MySQL: [ OK ]
[root@calvin1 ~]# mysql -u root -p123456
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.0.77-log Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

2.在master 129 上配置my.cnf文件，添加下列参数：
server-id=2
log-bin=mysql-bin
log-salve-updates
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=2

重新启动mysql
[root@calvin2 ~]# /etc/init.d/mysqld start
Starting MySQL: [ OK ]
[root@calvin2 ~]# mysql -u root -p123456
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.0.77-log Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

3.在在master 128上创建复制账号：
mysql> grant replication slave,file on *.* to mysync@'192.168.190.129' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

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

对所有表添加只读锁：
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)

查看master二进制文件，pos号：
mysql> show master status\G;
*************************** 1. row ***************************
            File: mysql-bin.000004
        Position: 906
    Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.00 sec)

ERROR:
No query specified

mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

4.在在master 129上创建复制账号：
mysql> grant replication slave,file on *.* to mysync@'192.168.190.128' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

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

对所有表添加只读锁：
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)

查看master二进制文件，pos号：
mysql> show master status\G;
*************************** 1. row ***************************
            File: mysql-bin.000001
        Position: 318
    Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.00 sec)

ERROR:
No query specified

mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected (0.00 sec)

5.修改同步参数：
根据第3步读取的二进制文件和pos号，配置master 128的同步参数：
mysql> change master to
    -> master_host='192.168.190.129',
    -> master_user='mysync',
    -> master_password='123456',
    -> master_log_file='mysql-bin.000001',
    -> master_log_pos=318;
Query OK, 0 rows affected (0.01 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

根据第4步读取的二进制文件和pos号，配置master 129的同步参数：
mysql> change master to
    -> master_host='192.168.190.128',
    -> master_user='mysync',
    -> master_password='123456',
    -> master_log_file='mysql-bin.000004',
    -> master_log_pos=906;
Query OK, 0 rows affected (0.01 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

6.查看slave同步状态(查看Slave_IO_Running和Slave_SQL_Running是否均为Yes)：
master128：
mysql> show slave status\G;
*************************** 1. row ***************************
             Slave_IO_State: Waiting for master to send event
                Master_Host: 192.168.190.129
                Master_User: mysync
                Master_Port: 3306
              Connect_Retry: 60
            Master_Log_File: mysql-bin.000001
        Read_Master_Log_Pos: 318
             Relay_Log_File: mysqld-relay-bin.000002
              Relay_Log_Pos: 235
      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: 318
            Relay_Log_Space: 235
            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
1 row in set (0.00 sec)

ERROR:
No query specified

master129：
mysql> show slave status\G;
*************************** 1. row ***************************
             Slave_IO_State: Waiting for master to send event
                Master_Host: 192.168.190.128
                Master_User: mysync
                Master_Port: 3306
              Connect_Retry: 60
            Master_Log_File: mysql-bin.000004
        Read_Master_Log_Pos: 906
             Relay_Log_File: mysqld-relay-bin.000002
              Relay_Log_Pos: 235
      Relay_Master_Log_File: mysql-bin.000004
           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: 906
            Relay_Log_Space: 235
            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
1 row in set (0.00 sec)

ERROR:
No query specified