YUM升级MySQL5.6到5.7

官方指引：https://dev.mysql.com/doc/refman/5.7/en/updating-yum-repo.html

• 升级到5.6.X的最新版本5.6.45(from 5.6.44)

sudo yum update mysql-server
service mysql restart

• 指定升级（安装）版本

yum -y install yum-utils #如果没有,安装yum-config-manager
sudo yum-config-manager --disable mysql56-community
sudo yum-config-manager --enable mysql57-community

必要时，可直接编辑/etc/yum.repos.d/mysql-community.repo，具体内容如下：

[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

•  执行升级

sudo yum update mysql-server

• 重启mysql

sudo service mysql restart 

• 检查并升级MySQL系统表

mysql_upgrade -uuser -ppassword

• 重启mysql

sudo service mysql restart