mysql5.7.22双机热备份（个人笔记）

1.配置my.cnf文件

修改A的/etc/my.cnf 文件，在my.cnf 配置项中加入下面配置：

server-id = 1      #Server 标识
log-bin
binlog-do-db=test  #指定需要日志的数据库

2.分别进入mysql

主机A:106.14.200.10

CHANGE MASTER TO
MASTER_HOST='106.14.200.12',
MASTER_USER='root',
MASTER_PASSWORD='root账户密码',
MASTER_PORT=3306,
MASTER_LOG_FILE='master_02.000007',//在主机B中mysql中执行show master status\G;可获取该值
MASTER_LOG_POS=1284,//在主机B中mysql中执行show master status\G;可获取该值
MASTER_CONNECT_RETRY=101;//service-id

主机B:106.14.200.12

CHANGE MASTER TO
MASTER_HOST='106.14.200.10',
MASTER_USER='root',
MASTER_PASSWORD='root账户密码',
MASTER_PORT=3306,
MASTER_LOG_FILE='master_01.000006',//在主机A中mysql中执行show master status\G;可获取该值
MASTER_LOG_POS=154,//在主机A中mysql中执行show master status\G;可获取该值
MASTER_CONNECT_RETRY=106;//service-id

防止同步时出如下错误：

Column 2 of table 'test.t_audio' cannot be converted from type 'varchar(765(bytes))' to type 'varcha

需要分别给对应的db中的表都加上

Alter table tablea convert to character set utf8;
Alter table tableb convert to character set utf8;
......

分别开启slave

start slave;

分别查看slave状态：

mysql> show slave status\G;

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