xbstream -x < ./backs/backup.xbstream -C /dbnode/data/
innobackupex --defaults-file=/dbnode/etc/my.cnf --ibbackup=xtrabackup --apply-log /dbnode/data/
innobackupex --defaults-file=/dbnode/etc/my.cnf --ibbackup=xtrabackup --copy-back ./restore (可不用)
chown -R mysql:mysql /dbnode/data