mysql主从同步-多实例主从备份-简要步骤

1,[M][S]改配置

s:my.cnf
log-bin = mysql-bin  # 日志文件名
server-id = 1 # 主数据库端ID号 
注意:slave开不开都行,log_bin可开可不开,server-id不一样就ok.
如果做级联的话,要开.且要额外开log-slave-update

2,[M]建用户s:

 grant replication slave on *.* to 'rep'@'192.168.100.%' identified by '123456';
 flush privileges;

2,[M]锁主表

flush table with read lock;

3,[M]备份

mysqldump -uroot -S /data/3306/mysql.sock -A -B --events|gzip > /opt/req.sql.gz
mysqldump -uroot -S /data/3306/mysql.sock -A -B --events --master-data=1 > /opt/req.sql
注:备份完事后解锁
unlock tables;

4,[S]导入数据到从库

mysql -uroot -S /data/3307/mysql.sock < /opt/req.sql

5,[S]

 

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


 CHANGE MASTER TO
MASTER_HOST='192.168.14.138',
MASTER_PORT=3306,
MASTER_USER='rep',
MASTER_PASSWORD='123456',
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=335;

6,

[S]start slave;