你的位置:首页 > 操作系统

[操作系统]Linux下MySQL主从同步配置


Centos6.5 MySQL主从同步 MySQL版本5.6.25

主服务器:centos6.5 IP:192.168.1.101

从服务器:centos6.5 IP:192.168.1.102

一、主服务器相关配置

  1、创建同步账户并指定服务器地址

[root@localhost ~]mysql -uroot -pmysql>use mysqlmysql>grant replication slave on *.* to 'testuser'@'192.168.1.102' identified by '12345678';mysql>flush privileges #刷新权限

  授权用户testuser只能从192.168.1.102这个地址访问主服务器192.168.1.101的数据库,并且只具有数据库备份的权限

  2、修改/etc/my.cnf配置文件vi /etc/my.cnf

[mysqld]下添加以下参数,若文件中已经存在,则不用添加server-id=1 log-bin=mysql-bin #启动MySQL二进制日志系统,binlog-do-db=ourneeddb #需要同步的数据库binlog-ignore-db=mysql  #不同步mysql系统数据库,若还有其它不想同步的,继续添加[root@localhost ~]/etc/init.d/mysqld restart #重启服务

  3、查看主服务器master状态(注意File与Position项,从服务器需要这两项参数)

mysql> show master status;+------------------+----------+--------------+------------------+| File       | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.000012 |   120 | ourneeddb| mysql      |+------------------+----------+--------------+------------------+

  4、导出数据库

  导出数据库之前先锁定数据库

  flush tables with read lock;    #数据库只读锁定命令,防止导出数据库的时候有数据写入

  unlock tables; #解除锁定

  导出数据库结构及数据:mysqldump -uroot -p ourneeddb > /home/ourneeddb.sql

  导出存储过程及函数 :mysqldump -uroot -p -ntd -R ourneeddb > ourneeddb_func.sql

  tips:-ntd导出存储过程、-R导出函数

 

 二、从服务器相关配置

  1、修改/etc/my.cnf配置文件vi /etc/my.cnf

[mysqld]下添加以下参数,若文件中已经存在,则不用添加server-id=2  #设置从服务器id,必须于主服务器不同log-bin=mysql-bin #启动MySQ二进制日志系统replicate-do-db=ourneeddb  #需要同步的数据库名replicate-ignore-db=mysql  #不同步mysql系统数据库[root@localhost~ ]/etc/init.d/mysqld restart #重启服务

  2、导入数据库

  导入过程这里不做阐述

    3、配置主从同步

[root@localhost~ ]mysql -uroot -pmysql>use mysql mysql>stop slave;mysql>change master to    master_host='192.168.1.101',   master_user='testuser',   master_password='12345678',   master_log_file='mysql-bin.000012',   master_log_pos=120; #log_file与log_pos是主服务器master状态下的File与Positionmysql>start slave;mysql>show slave status\G;

 

*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.101
Master_User: testuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000012
Read_Master_Log_Pos: 120
Relay_Log_File: orange-2-relay-bin.000003
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000012
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: orange
Replicate_Ignore_DB: mysql,test,information_schema,performance_schema
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: 120
Relay_Log_Space: 1320
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
Master_UUID: 773d2987-6821-11e6-b9e0-00163f0004f9
Master_Info_File: /home/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0  

注意查看Slave_IO_Running: Yes  Slave_SQL_Running: Yes 这两项必须为Yes 以及Log_File、Log_Pos要于master状态下的File,Position相同

如果都是正确的,则说明配置成功!