1、yum -y install wget
2、执行下载命令：wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
3、安装mysql源：yum localinstall mysql80-community-release-el7-1.noarch.rpm
4、检查是否安装成功：yum repolist enabled | grep "mysql.*-community.*"
5、卸载mariadb-libs：yum -y remove mariadb-libs
6、安装mysql：yum install mysql-community-server
7、启动服务：systemctl start mysqld
8、查看启动状态：systemctl status mysqld
9、设置开机启动：systemctl enable mysqld
systemctl daemon-reload