Mysql中的多级复制方式

mysql> CREATE USER 'copy'@'%' IDENTIFIED BY 'copy123456';
mysql> GRANT REPLICATION SLAVE ON *.* TO 'copy'@'%';

Ubuntu中的配置文件路径为：
/etc/mysql/my.cnf
 
Windows中的默认配置文件路径为：
C:\ProgramData\MySQL\MySQL Server 8.0\my.ini

[mysqld]
server-id=104538
#服务器id
 
log_slave_updates=1
#log_slave_updates设为ON，把在主服务器那里接收到的更新，记录到自己的二进制日志中
 
binlog-ignore-db=information_schema
binlog-ignore-db=mysql
binlog-ignore-db=sys
binlog-ignore-db=performance_schema
#设置忽略同步的数据库（这里也可以设置需要同步的数据库名）

service mysql restart

mysql> FLUSH TABLES WITH READ LOCK;

mysql> UNLOCK TABLES;

SHOW MASTER STATUS;

CHANGE REPLICATION SOURCE TO
SOURCE_HOST='source_host_name',
SOURCE_USER='replication_user_name',
SOURCE_PASSWORD='replication_password',
SOURCE_LOG_FILE='recorded_log_file_name',#上图的File
SOURCE_LOG_POS=recorded_log_position;#上图的Position

CHANGE MASTER TO
MASTER_HOST='source_host_name',
MASTER_USER='replication_user_name',
MASTER_PASSWORD='replication_password',
MASTER_LOG_FILE='recorded_log_file_name',
MASTER_LOG_POS=recorded_log_position;

START SLAVE;

SHOW SLAVE STATUS;
 
#如果Slave_IO_State为：Waiting for source to send event
#且Slave_IO_Running和Slave_SQL_Running都为Yes
#则代表主从同步正在正常运行