mysql主从分离

Posted 2020-11-10 zhyemmmm

1、工具：

两台机器

master:192.168.0.1

slave:192.168.0.2

2、master的配置

找到mysql的配置文件，一般centos的是/etc/my.cnf，ubuntu的是/etc/mysql/mysql.conf.d/mysqld.cnf

跳到到[mysqld]下配置

bind-address = 192.168.0.1 #可注释
server-id = 1 #架构中唯一节点id
log_bin=mysql-bin
log_bin = /var/log/mysql/mysql-bin.log #开启binlog
binlog-ignore-db=mysql  #不需要复制的数据库
binlog-do-db=ufind_db   #要复制的数据库

重启master

service mysql restart

进入mysql命令行，加用户

CREATE USER \'zhylioooo\'@\'%\' IDENTIFIED BY \'123456\';
GRANT REPLICATION SLAVE ON *.* TO \'zhylioooo\'@\'%\';

导出master数据库

给数据库加锁使其只可读

FLUSH TABLES WITH READ LOCK;

到处数据库文件

mysqldump -u root -p --all-databases --master-data > dbdump.sql

给数据库解锁

UNLOCK TABLES;

查看master的二进制记录文件及文件当前记录的位置

SHOW MASTER STATUS;

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

| File    | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000001 |  1050 |    |     |     |

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

1 row in set (0.00 sec)

 

3、slave配置

slave配置重点

server-id = 2 #架构中唯一节点id，比master大
log_bin=mysql-bin
log_bin = /var/log/mysql/mysql-bin.log #开启binlog

重启mysql

导入master导出的数据库文件，使数据库一致

 mysql -u root -p < dbdump.sql

进入mysql使slave与master连接

STOP SLAVE;

CHANGE MASTER TO
 -> MASTER_HOST=\'192.168.0.1\',
 -> MASTER_USER=\'zhylioooo\',
 -> MASTER_PASSWORD=\'123456\',
 -> MASTER_LOG_FILE=\'mysql-bin.000001\',
 -> MASTER_LOG_POS=1050;

START SLAVE;

4、集群策略：https://www.cnblogs.com/KTblog/p/5122825.html