下載對應的包

wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar

備份數據庫（至少備份mysql）

innobackupex -uxbackup -u root -p ocm123 --no-timestamp /data/backup/

手動在備一次
mv mysql mysql_bak
建立軟連接
ln -s /root/mysql-5.7.22-linux-glibc2.12-x86_64 mysql
查看mysql_upgrade 幫助文檔 -s, --upgrade-system-tables Only upgrade the system tables, do not try to upgrade the data.
/etc/init.d/mysqld start
mysql_upgrade -s
/etc/init.d/mysqld restart
到此升級完成，註意觀察error日誌

mysql 5.6升級到5.7.22