mysql 主从配置详细流程

如何安装mysql

mysql-5.7.20
源码安装

如何配置mysql 主从同步

MySQL的一主二从异步复制(半同步复制)

以下为配置主从半同步示例：

//创建主从同步的用户，10.168.1.217为从服务器的IP

GRANT REPLICATION SLAVE ON *.* TO 'repl_user'@'10.168.1.217' IDENTIFIED BY '123456';

FLUSH PRIVILEGES;

//全量备份

mysqldump -uroot -p --single-transaction --events --triggers --routines --flush-logs --master-data=2 --databases ismarthome > ismarthome.sql

//从主上下载testDb.sql

scp root@10.168.1.216:/root/testDb.sql /root/

//导入到10.168.1.216数据库中

//导入之前先删除testDb数据库

mysql -uroot -p'123456' < testDb.sql

//配置主从同步

stop slave;

change master to

master_host='10.168.1.216',

master_user='repl_user',

master_password='123456',

master_log_file='mysql_bin.000005',

master_log_pos=154;

start slave;

show slave status\G;

查看

//Master

mysql -uroot -p'123456'

SET GLOBAL rpl_semi_sync_master_enabled = 1;

SHOW GLOBAL VARIABLES LIKE '%semi%';

show status like 'rpl_semi%';

//Slave

mysql -uroot -p'123456'

SET GLOBAL rpl_semi_sync_slave_enabled = 1;

stop slave;

start slave;

SHOW GLOBAL VARIABLES LIKE '%semi%';

show status like 'rpl_semi%';

show slave status\G;

//设置延迟

stop slave;

change master to master_delay=0;

start slave;