centos7 二进制安装MySQL8（精简版）
一、下载MySQL8安装包
1、wget从官网拉取压缩包：wget https://cdn.mysql.com/archives/mysql-8.0/mysql-8.0.28-1.el7.x86_64.rpm-bundle.tar
2、上传提前下载的安装包到服务器上进行解压安装
上述两种办法取其一即可！！！！！！！！！！！！！！！！！！！！！！！
二、安装MySQL
1、在安装MySQL之前呢，先将系统内自带的mariadb安装包卸载掉，以防数据库冲突！！！
rpm -aq | grep mariadb
强制卸载自带的mariadb
rpm -e --nodeps mariadb-libs
2、解压MySQL安装包
解压之后会有很多rpm安装包，只安装我们所需要的即可
rpm -ivh mysql-community-common-8.0.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm
发现载安装最后一个的时候有报错，是缺少环境导致的。我们先安装一下环境在尝试部署
[root@mysql ~]# rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm
warning: mysql-community-server-8.0.28-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
error: Failed dependencies:
/usr/bin/perl is needed by mysql-community-server-8.0.28-1.el7.x86_64
net-tools is needed by mysql-community-server-8.0.28-1.el7.x86_64
perl(Getopt::Long) is needed by mysql-community-server-8.0.28-1.el7.x86_64
perl(strict) is needed by mysql-community-server-8.0.28-1.el7.x86_64
yum install net-tools* -y
yum install pery -y
安装完后在部署 ”rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm “ 就行了
三、环境配置
1、初始化数据库
mysqld --initialize --console
2、赋予权限
chown -R mysql:mysql /var/lib/mysql
3、启动数据库
systemctl start mysqld
4、查看数据库初始化密钥
cat /var/log/mysqld.log | grep localhost
5、登录数据库同时修改密码
alter user 'root'@'localhost' identified by 'password';