MySQL 5.7主從複製

Master

一、創建複製的用戶

create user 'dba'@'192.168.%.%' identified by '123456';

grant replication slave on *.* to dba@'192.168.%.%';

Slave

mysql -u root -p < all.sql
change master to master_host='192.168.55.133',
master_user='dba',
master_password='123456',
master_log_file='mysql-bin.000001',
master_log_pos=154;
start slave;

show slave status \G;

MySQL備份遇到的坑

mysqldump --single-transaction --master-data=2 --triggers --routines --all-databases -u root -p > all.sql

mysqldump --single-transaction --master-data=2 --triggers --routines --events --all-databases -u root -p > all.sql

當執行mysqldump命令後出現mysqldump: Error: Binlogging on server not active

在linux環境下，修改vi /etc/my.cnf文件，去掉mysqld下面log_bin的註釋，將其改爲

log_bin=mysql-bin

server_id=1

，輸入命令systemctl restart mysqld重啓MySQL。

GTID主從複製：

change master to
master_host='192.168.55.137',
master_port=3306,
master_user='dba',
master_password='123456',

master_auto_position=1;

關於從庫的其他屬性，特別重要

1、只讀屬性

read_only=on

super_read_only=on

2、slave的開啓是否隨着mysqld的啓動而一起啓動

skip_slave_start=on

3、log_slave_updates=on

MySQL從庫選項log-slave-updates未啓用引發的異常