1、配置YUM源

下载mysql源安装包

shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

安装mysql源

shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm 
检查MySQL源是否安装成功 
shell> yum repolist enabled | grep “mysql.-community.” 
2、安装MySQL 
shell> yum install mysql-community-server 
3、启动MySQL服务 
shell> systemctl start mysqld 
查看MySQL的启动状态 
shell> systemctl status mysqld

4、开机启动 
shell> systemctl enable mysqld 
shell> systemctl daemon-reload

5、修改root本地登录密码 
grep ‘temporary password’ /var/log/mysqld.log 
mysql -uroot –p+生产的密码

注意：mysql5.7默认安装了密码安全检查插件（validate_password），默认密码检查策略要求密码必须包含：大小写字母、数字和特殊符号，并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误，如下图所示：

ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘MyNewPass4!’; 
set password for ‘root’@’localhost’=password(‘MyNewPass4!’); 
通过msyql环境变量可以查看密码策略的相关信息： 
mysql> show variables like ‘%password%’; 
6、添加远程登录用户 
默认只允许root帐户在本地登录，如果要在其它机器上连接mysql，必须修改root允许远程连接，或者添加一个允许远程连接的帐户， 
mysql> GRANT ALL PRIVILEGES ON . TO ‘*’@’ localhost’ IDENTIFIED BY ’ MyNewPass4!’ WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON . TO ‘*’@’ Spark’ IDENTIFIED BY ’ MyNewPass4!’ WITH GRANT OPTION;

7、配置默认编码为utf8

修改/etc/my.cnf配置文件，在[mysqld]下添加编码配置，如下所示： 
[mysqld] 
character_set_server=utf8 
init_connect=’SET NAMES utf8’

默认配置文件路径：  
配置文件：/etc/my.cnf  
日志文件：/var/log//var/log/mysqld.log  
服务启动脚本：/usr/lib/systemd/system/mysqld.service  
socket文件：/var/run/mysqld/mysqld.pid