1.檢視centos系統版本

# cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)

2.下載並安裝repo倉庫檔案

下載地址：https://dev.mysql.com/downloads/repo/yum/

# wget https://repo.mysql.com//mysql80-community-release-el7-5.noarch.rpm

# yum localinstall -y mysql80-community-release-el7-5.noarch.rpm 
已載入外掛：fastestmirror
正在檢查 mysql80-community-release-el7-5.noarch.rpm: mysql80-community-release-el7-5.noarch
mysql80-community-release-el7-5.noarch.rpm 將被安裝
正在解決依賴關係
--> 正在檢查事務
---> 軟體包 mysql80-community-release.noarch.0.el7-5 將被 安裝
--> 解決依賴關係完成

依賴關係解決

================================================================================================
 Package                     架構     版本      源                                         大小
================================================================================================
正在安裝:
 mysql80-community-release   noarch   el7-5     /mysql80-community-release-el7-5.noarch   9.1 k

事務概要
================================================================================================
安裝  1 軟體包

總計：9.1 k
安裝大小：9.1 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安裝    : mysql80-community-release-el7-5.noarch                                      1/1 
  驗證中      : mysql80-community-release-el7-5.noarch                                      1/1 

已安裝:
  mysql80-community-release.noarch 0:el7-5                                                      

完畢！
 

3.驗證倉庫軟體

# yum makecache

# yum repolist all|grep mysql8
mysql80-community/x86_64            MySQL 8.0 Community Server      啟用:    321
mysql80-community-source            MySQL 8.0 Community Server - So 禁用

# yum repolist enabled | grep "mysql*"            
mysql-connectors-community/x86_64       MySQL Connectors Community           230
mysql-tools-community/x86_64            MySQL Tools Community                138
mysql80-community/x86_64                MySQL 8.0 Community Server           321
 

4.安裝MySQL8

說明：此時倉庫中只有一個MySQL版本，因此可以直接安裝

# yum install -y mysql-community-server

# 使用以下方式檢查安裝包
# rpm -qa|grep -i "mysql.*8.*"
mysql80-community-release-el7-5.noarch
mysql-community-client-plugins-8.0.28-1.el7.x86_64
mysql-community-client-8.0.28-1.el7.x86_64
mysql-community-libs-compat-8.0.28-1.el7.x86_64
mysql-community-common-8.0.28-1.el7.x86_64
mysql-community-libs-8.0.28-1.el7.x86_64
mysql-community-icu-data-files-8.0.28-1.el7.x86_64
mysql-community-server-8.0.28-1.el7.x86_64