MySQL 8.0.18使用clone plugin重建MGR的实现

假设三节点MGR某个节点异常，需要重新把这个节点加入到MGR集群中，具体操作过程如下：

贡献者端执行（192.168.1.11）

DROP USER 'donor_clone_user'@'192.168.1.12';CREATE USER 'donor_clone_user'@'192.168.1.12' IDENTIFIED BY 'password';GRANT BACKUP_ADMIN on *.* to 'donor_clone_user'@'192.168.1.12';INSTALL PLUGIN clone SONAME 'mysql/' target='_blank'>mysql_clone.so'; 

接收者端执行（192.168.1.12）

DROP USER 'recipient_clone_user'@'192.168.1.12';CREATE USER 'recipient_clone_user'@'192.168.1.12' IDENTIFIED BY 'password';GRANT CLONE_ADMIN on *.* to 'recipient_clone_user'@'192.168.1.12';INSTALL PLUGIN clone SONAME 'MySQL_clone.so';SET GLOBAL clone_valid_donor_list = '192.168.1.11:3311';exitmysql -urecipient_clone_user -ppassword -h 192.168.1.12 -P3311CLONE INSTANCE FROM 'donor_clone_user'@'192.168.1.11':3311 IDENTIFIED BY 'password';exitmysql -uroot -pstart group_replication;select * from performance_schema.replication_group_members;

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