centos7+ 安装mysql8

• 关闭selinux

vi /etc/selinux/config
//修改为
SELINUX=disabled

• 修改yum源为163
  具体参考:http://mirrors.163.com/.help/centos.html

// 备份  下载新的替换
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
yum clean all
yum makecache

• 安装mysql8

yum localinstall https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm
yum install mysql-community-server -y

• 安装其他第三方依赖

yum install perl -y
yum install net-tools -y

• 初始化mysql

mysqld --initialize
chmod -R 777 /var/lib/mysql/*

• 查看初始密码

grep 'temporary password' /var/log/mysqld.log
2019-08-19T06:16:02.663494Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: 1wprTxF?fkY1

• 启动并登录数据库

service mysqld start
mysql -uroot -p

• 修改root账户密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123123';

• 允许root远程登录

use mysql;
update user set host = '%' where user ='root';
flush privileges;
//退出数据库, 修改 mysql 配置文件
vi /etc/my.cnf
[mysqld]
character-set-server=utf8
bind-address=0.0.0.0

• 防火墙开启3306

firewall-cmd --zone=public --add-port=3306/tcp --permanent 
firewall-cmd --reload