配置MySQL主从复制

Posted 2020-07-08

说明

mysql版本为5.6.26

安装MySQL步骤就省略了。

MySQL主从复制注意点

      1、在master端要启用binlog日志。slave端不用启用binlog日志

       2、master和slave的server-id要不一样

主从my.cnf配置的区别

不列出server-id了，设置不同即可。主要是[mysqld]区域的 不同

master

log-bin                         =/data/mysql_log/mysql-bin

expire-logs-days                = 14

sync-binlog                     = 1

binlog_format                   = row

slave

relay-log                       =/data/mysql_log/mysql-relay.log

relay-log-index                 =/data/mysql_log/mysql-relay.index

架构图

系统环境

# cat /etc/redhat-release

CentOS release 6.6 (Final)

# uname -rm

2.6.32-504.el6.x86_64 x86_64

在主库上创建数据库并插入数据

mysql> create databasekevin;

Query OK, 1 row affected(0.00 sec)

mysql> use kevin

Database changed

mysql> create tablestudent(

    -> id int(4) not null auto_increment,

    -> name char(20) not null,

    -> primary key(id),     

    -> key index_name(name)

    -> )AUTO_INCREMENT=1;

Query OK, 0 rows affected(0.10 sec)

mysql> insert intostudent values(1,‘Kevin‘),(2,‘Dave‘),(3,‘Danny‘),(4,‘Jenny‘),(5,‘Jerry‘);

Query OK, 5 rows affected(0.02 sec)

Records: 5  Duplicates: 0 Warnings: 0

创建主从复制

在master上操作

建立同步用户

mysql> GRANT REPLICATIONSLAVE ON *.* TO ‘repuser‘@‘192.168.56.%‘ IDENTIFIED BY ‘123456‘;

Query OK, 0 rows affected(0.00 sec)

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected(0.00 sec)

mysql> FLUSH LOGS;

Query OK, 0 rows affected(0.00 sec)

mysql> show binary logs;

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

| Log_name         | File_size |

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

| mysql-bin.000001 |      2189 |

| mysql-bin.000002 |       323 |

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

2 rows in set (0.00 sec)

mysql> \q

Bye

备份数据库

[[email protected] ~]#innobackupex --user=root --password=123456 /backup/

准备备份

[[email protected] ~]#innobackupex --apply-log /backup/2016-05-18_19-19-38/

在插入一条数据

mysql> use kevin

Database changed

mysql> insert intostudent values(6,‘Lucy‘);

Query OK, 1 row affected(0.14 sec)

mysql> select * fromstudent\G

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

  id: 3

name: Danny

***************************2. row ***************************

  id: 2

name: Dave

***************************3. row ***************************

  id: 4

name: Jenny

***************************4. row ***************************

  id: 5

name: Jerry

***************************5. row ***************************

  id: 1

name: Kevin

***************************6. row ***************************

  id: 6

name: Lucy

6 rows in set (0.00 sec)

mysql> show masterstatus\G

将备份拷贝到从库上

[[email protected] ~]# scp-r /backup/2016-05-18_19-19-38 [email protected]:/backup/

slave上操作

删除原始数据

[[email protected] ~]# cd/data/mysql_data/

[[email protected]_data]# rm -fr *

[[email protected]_data]# cd

恢复数据

[[email protected] ~]#innobackupex --copy-back /backup/2016-05-18_19-19-38/

[[email protected] ~]#chown -R mysql.mysql /data/mysql_data/

启动MySQL

[[email protected] ~]#/etc/init.d/mysqld start

验证数据

[[email protected] ~]#mysql -uroot –p

mysql> show databases;

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

| Database           |

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

| information_schema |

| kevin              |

| mysql              |

| performance_schema |

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

4 rows in set (0.04 sec)

mysql> use kevin;

Database changed

mysql> select * fromstudent\g

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

| id | name  |

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

|  3 | Danny |

|  2 | Dave |

|  4 | Jenny |

|  5 | Jerry |

|  1 | Kevin |

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

5 rows in set (0.07 sec)

从从库上读主库的binlog

mysql> change master tomaster_host=‘192.168.56.12‘,master_port=3306,master_user=‘repuser‘,master_password=‘123456‘,master_log_file=‘mysql-bin.000001‘,master_log_pos=2189;

启动slave

mysql> start slave;或者执行START SLAVEIO_Thread;和START SLAVE SQL_Thread;

mysql> select * fromstudent;

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

| id | name  |

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

|  3 | Danny |

|  2 | Dave |

|  4 | Jenny |

|  5 | Jerry |

|  1 | Kevin |

|  6 | Lucy |

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

6 rows in set (0.00 sec)

现在数据完全同步

在slave2上进行与slave1的完全一样的操作即可。

由于个人技术所限有不足之处还请各位指出。可以通过以下两个群找到笔者。

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本文出自 “长街听风人” 博客，请务必保留此出处http://kevinhao.blog.51cto.com/5204735/1775132