1. 主库备份数据，拷贝至从节点

1.1 备份数据

sudo python /data/apps/xtrabackup/script/xtrabackup.py -m full

备份目录为：

/data/mysql_bakcup/<port>/<date>/full_<date>

例：/data/mysql_backup/13306/20231124/full_164044/

1.2 拷贝备份数据至从节点

scp -r /data/mysql_bakcup/<port>/<date>/full_<date> /data/

例：scp -r /data/mysql_backup/13306/20231124/full_164044/ kde-offline2:/data/

1. 停止从库服务，备份从库数据目录
   1. 停止从库服务

systemctl stop mysql13306 #注意，服务名称端口根据实际情况进行修改

1. 备份数据目录，重新创建数据目录

mv /data/mysql13306/ /data/mysql13306_bak20231124/

mkdir /data/mysql13306/

1. 将从库mysql数据拷贝至从库数据目录

cp -r /data/full_164044/* /data/mysql13306/

cp /data/mysql13306_bak20231124/my13306.cnf /data/mysql13306/   #覆盖

chown -R mysql:mysql /data/mysql13306/

1. 查看从库节点的binlog信息中gtid，并记录

 head -1 /data/mysql13306/xtrabackup_binlog_info

mysql-bin.000009 387167570 7a2ffba6-7ab8-11ee-815f-fa163e25443d:1-2139088

记录：7a2ffba6-7ab8-11ee-815f-fa163e25443d:1-2139088

1. 启动从库数据库

systemctl start mysql13306

1. 登录从库进行配置

mysql -h127.0.0.1 -P13306 -uroot -pKingsoft_com123!

reset master;

set global gtid_purged="7a2ffba6-7ab8-11ee-815f-fa163e25443d:1-2139088";

change master to master_host='10.5.x.x',master_port=13306,master_user='replica',master_password='Kingsoft_com123!',MASTER_AUTO_POSITION=1;start slave;

查看从库状态

show slave status\G;