参考：Linux安装mysql（mysql-5.7.23-1.el7.x86_64.rpm-bundle.tar）
1、下载mysql安装包：mysql-5.7.36-1.el7.x86_64.rpm-bundle.tar
MySQL :: Download MySQL Community Server (Archived Versions)
2、上传安装包到centos服务器，然后安装
tar xvf mysql-5.7.36-1.el7.x86_64.rpm-bundle.tar
rpm -ivh mysql-community-common-5.7.36-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.36-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.36-1.el7.x86_64.rpm
pm -ivh mysql-community-server-5.7.36-1.el7.x86_64.rpm
yum install libaio
