1.在当前主节点创建全量备份(mysqldump或xtrabackup)：

# /usr/bin/innobackupex --defaults-file=/etc/my.cnf --user=root --password='xxxx' /data/backup

2.停止故障实例的MySQL

# mysqladmin -uroot -p shutdown

3.清空当前数据目录

备注：清空前备份一下

4.恢复全量备份到故障实例:

#/usr/bin/innobackupex --defaults-file=/etc/my.cnf --user root --socket=/tmp/mysql.sock --apply-log /data/backup

#/usr/bin/innobackupex --defaults-file=/etc/my.cnf --user root --socket=/tmp/mysql.sock --move-back /data/mysql

5.启动MySQL:

#mysqld_safe --user=mysql &

6.更新GTID_PURGE

mysql> RESET MASTER;

mysql> RESET SLAVE ALL;

mysql> SET SQL_LOG_BIN=OFF;

mysql> SOURCE datadir/backup_gtid_executed.sql

mysql> SET SQL_LOG_BIN=ON;

mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='password' FOR CHANNEL 'group_replication_recovery';

启动组复制:

mysql> START GROUP_REPLICATION;

7.检查节点状态:

mysql> SELECT * member_host, member_port, member_state FROM performance_schema.replication_group_members;