1. 下载 mysql 的 yum 源

https://dev.mysql.com/downloads/repo/yum/

2. 装置 yum 源

shell> sudo yum localinstall platform-and-version-specific-package-name.rpm

3. 抉择 mysql 版本

shell> yum repolist all | grep mysql

shell> sudo yum-config-manager --disable mysql56-community
shell> sudo yum-config-manager --disable mysql80-community
shell> sudo yum-config-manager --enable mysql57-community

4. 查看 mysql 版本是否正确

shell> yum repolist enabled | grep mysql

5. 装置 mysql

shell> sudo yum install mysql-community-server

6. 启动 mysql

shell> sudo service mysqld start
Starting mysqld:[OK]