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CentOS7+mysql5.6配置主从

时间:2021-07-01 10:21:17 帮助过:30人阅读

操作系统:CentOS-7-x86_64-DVD-1611.iso

数据库版本:mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz

数据库地址:
  192.168.2.1(主)
  192.168.2.2(从)

 


  MySQL在5.6之前和之后的安装方式是不一样的。 

自己整理的mysql安装,主从配置基于这篇安装:http://www.cnblogs.com/cypress/p/8608496.html

首先保证3306端口的可用,或者关闭防火墙,两台机子可以互相ping

二、Master的配置

1.修改MySQL配置文件

[root@localhost ~]# vim /etc/my.cnf 

  文件内容

 

[mysqld]
#开启二进制日志
log-bin=mysql-bin
#标识唯一id(必须),一般使用ip最后位
server-id=2
#不同步的数据库,可设置多个
binlog-ignore-db=information_schema
binlog-ignore-db=cluster
binlog-ignore-db=mysql
#指定需要同步的数据库(和slave是相互匹配的),可以设置多个
binlog-do-db=test

 

  

 

2.重启MySQL

service mysqld restart

 

3.进去mysql设置允许从库获得主库日志  注:这里使用root用户配置,不建议使用

[root@localhost ~]# mysql -u root -p

 

#给从库放权限
mysql>GRANT FILE ON *.* TO ‘root‘@‘192.168.2.2‘ IDENTIFIED BY ‘root password‘;
mysql>GRANT REPLICATION SLAVE ON *.* TO ‘root‘@‘192.168.2.2‘ IDENTIFIED BY ‘root password‘;
mysql>FLUSH PRIVILEGES;

 

4.重启MySQL,登录MySQL,查看主库信息

mysql> show master status;

 显示内容

+------------------+----------+--------------+----------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                 | Executed_Gtid_Set |
+------------------+----------+--------------+----------------------------------+-------------------+
| mysql-bin.000006 |    120 | ufind_db     | information_schema,cluster,mysql |                   |
+------------------+----------+--------------+----------------------------------+-------------------+
1 row in set (0.00 sec)

mysql> 

 注:如果执行这个步骤始终为Empty set(0.00 sec),那说明前面的my.cnf没配置对

 

三、Slave的配置

1.从库配置

 

#开启二进制日志(可以不配置)
log-bin=mysql-bin server-id=3 binlog-ignore-db=information_schema binlog-ignore-db=cluster binlog-ignore-db=mysql
#与主库配置一直 replicate-do-db=test replicate-ignore-db=mysql log-slave-updates slave-skip-errors=all slave-net-timeout=60

 

4.重启MySQL,登录MySQL

#关闭Slave
mysql> stop slave;  
#设置连接主库信息 mysql> change master to master_host=‘192.168.2.1‘,master_user=‘root‘,master_password=‘root password‘,master_log_file=‘mysql-bin.000006‘, master_log_pos=120; #开启Slave mysql> start slave;

  注:上面的master_log_file是在配置Master的时候的File字段, master_log_pos是在配置Master的Position 字段。一定要一一对应

 

5.查看信息

mysql> show slave status \G;

  

*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.2.1
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 120
               Relay_Log_File: localhost-relay-bin.000006
                Relay_Log_Pos: 520
        Relay_Master_Log_File: mysql-bin.000006
             Slave_IO_Running: Yes  //显示yes为成功
            Slave_SQL_Running: Yes  //显示yes为成功,如果为no,一般为没有启动master
              Replicate_Do_DB: test
          Replicate_Ignore_DB: mysql
//上面的都是配置文件中的信息 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: 357 Relay_Log_Space: 697 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:  //如果为no,此处会显示错误信息 Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 2 Master_UUID: be0a41c0-2b40-11e8-b791-000c29267b6a Master_Info_File: /usr/local/mysql/data/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 1 row in set (0.00 sec) ERROR: No query specified

  注:如果Slave_IO_Running: No  出现下面的错误

Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.

  说明主服务器的UUID和从服务器的UUID重复,更改方式

[root@localhost ~]# vim /usr/local/mysql/data/auto.cnf  #这是我的安装路径修改auto.cnf的server-uuid

  以上主从MySQL已经可以使用了,欢迎各位多提bug

部分内容,测试方式可以参考转载地址:http://blog.csdn.net/u010870518/article/details/51331244

 

CentOS7+mysql5.6配置主从

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