Mysql主从复制操作

Mysql主从复制操作

 

一、主从同步的环境

我们假定有AB两台服务器,B作为A的一个远程容灾备份机,A上的Mysql数据要实时同步到B上。

假设我们的安装环境为:

Master主服务器AIP地址:172.30.25.244

Slave  从服务器BIP地址:172.30.25.245

ABMysql版本一致或者A的版本比B要高(杜绝B的版本比A)

红色字体:需要视实际情况进行修改

 

二、修改配置文件

1、修改A服务器的配置文件

vi /etc/my.cnf

找到server-id这行,修改server-id并在此行位置后面添加下面内容:

server-id = 1

log-bin=mysql-bin

relay_log = mysql-relay-bin

relay_log_index = mysql-relay-bin.index

binlog-do-db=test_xyp  ##需要复制的数据库

 

2、修改B服务器的配置文件

vi /etc/my.cnf

找到server-id这行,修改server-id并在此行位置后面添加下面内容:

server-id  = 2

replicate-do-db=test_xyp ##需要复制的数据库

 

修改完后重启ABMysql

service mysql restart;

 

 

三、对A进行Mysql操作

1、在A上为B建立一个用户

登录Mysql,并且为从服务器建立一个同步用户。

规格为:grant replication slave on *.* to '用户名'@'Slave主机' identified by '密码';

grant replication slave on *.* to 'appstore_appli'@'172.30.25.245' identified by 'coship';

flush privileges;

 

2、停止A服务,并导出数据

 

3、查看A的同步日志偏移信息

查看Master的同步日志偏移信息:

mysql> show master status;

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

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| mysql-bin.000164 |     233 | test_xyp     |                  |

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

 

mysql-bin.000164233记录下来(后面有用到):

 

 

四、在B上进行Mysql操作

1、将A导出的数据导入到B

 

2、指定同步日志的偏移

登录Mysql:

STOP SLAVE;

CHANGE MASTER TO MASTER_HOST='172.30.25.244',MASTER_USER='appstore_appli',MASTER_PASSWORD='coship', MASTER_LOG_FILE='mysql-bin.000164', MASTER_LOG_POS=233;

START SLAVE;

 

查看同步状态,看看和A的是否一致:

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 172.30.25.244

                  Master_User: appstore_appli

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000164

          Read_Master_Log_Pos: 233

               Relay_Log_File: coship245-relay-bin.000002

                Relay_Log_Pos: 252

        Relay_Master_Log_File: mysql-bin.000166

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: test_xyp

          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: 233

              Relay_Log_Space: 412

              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

 

 

 

 

 

五、进行数据同步测试,看是否OK

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转载自kolenxiao.iteye.com/blog/2033704