登陆从库:
mysql>stop slave;
mysql>show slave status;
mysql> reset slave all;

mysql>show master status; 记录此时从库的log_file和log_pos值

登陆主库:
修改/etc/keepalived/keepalived.conf文件
把priority 101改为priority 99，确认主库的priority值比从库小
#/etc/init.d/keepalived stop
在从库上确认虚拟IP是否漂移过去,用ip address命令确认
然后
mysql>change master to master_host='从库ip',master_user='slave',master_password='123456',master_log_file='从库当时记录的log_file',master_log_pos=从库当时记录的log_pos值,master_connect_retry=10;
start slave;
show slave status;

启动keepalived:
#/etc/init.d/keepalived start

至此切换完毕，在新主库上写入一条记录，看看是否同步到从从库。

ITPub博客

mysql 5.7+keepalived主从切换步骤简述

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