mysql备份之主从同步

主实例配置：

[mysqld]
log-bin=mysql-bin   #/ [必须]启用二进制日志
server-id=1         # [必须]服务器唯一ID

从实例配置：

[mysqld]
log-bin=mysql-bin   # [非必须]Slave可以不启用二进制日志，配置二进制日志可以便于Master和Slave交换角色
server-id=2         # [必须]服务器唯一ID

在Master上使用root用户登录建立同步账户并授权Slave

mysql> GRANT REPLICATION SLAVE ON *.* to 'lover'@'%' identified by 'kiss';
mysql> FLUSH PRIVILEGES;

使用root账户登录Master查看Master状态

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |     6584 | thisonedb    | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+

配置Slave跟踪Master日志的位置

mysql> change master to master_host='127.0.0.1',master_user='lover',master_password='kiss',master_log_file='mysql-bin.000002',master_log_pos=6584 ;
mysql> start slave;

使用root账户登录MySQL核对Slave状态，看到如下信息就说明配置成功了

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event 
                  Master_Host: 10.16.13.128
                  Master_User: username
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 6584
               Relay_Log_File: bx-13-129-relay-bin.000003
                Relay_Log_Pos: 6797
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes 
            Slave_SQL_Running: Yes