1.上传安装包到服务器 mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar
链接：https://pan.baidu.com/s/1JSW6_oQx39ncCiR4kTbFgA?
提取码：mysq
2.解压
tar -xvf mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar
3.检查是否安装过MariaDB
rpm -qa|grep mariadb
如图即为已经安装过MariaDB
4.移除MariaDB
rpm -e mariadb-libs-5.5.68-1.el7.x86_64 --nodeps
5.检查是否已经成功移除MariaDB
rpm -qa|grep mariadb
6.安装相关rpm包
rpm -ivh mysql-community-common-5.7.28-1.el7.x86_64.rpm??
rpm -ivh mysql-community-libs-5.7.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-compat-5.7.28-1.el7.x86_64.rpm
7.安装MySQL Client端
rpm -ivh mysql-community-client-5.7.28-1.el7.x86_64.rpm
8.安装MySQL Server端
rpm -ivh mysql-community-server-5.7.28-1.el7.x86_64.rpm
可不安装
rpm -ivh mysql-community-devel-5.7.28-1.el7.x86_64.rpm
9.初始化MySQL，并创建一个数据库
mysqld --initialize --user=mysql
10.查看MySQL初始化后创建的密码
cat /var/log/mysqld.log
11.设置开机自动启动
systemctl start mysqld.service?
12.查看MySQL是否启动成功
systemctl status mysqld.service
?13.登录MySQL
mysql -uroot -p
?重新设置MySQL 的密码，将密码设置为root
set password=password('root');
集群环境下需要关闭防火墙
关闭防火墙：systemctl stop firewalld
禁用防火墙：systemctl disable firewalld.service
如果启用了iptables则需要关闭iptables
systemctl stop iptables