CentOS7安装MySQL8.0.28

一、下载MySQL安装包

点击以下链接可以自动跳转：MySQL官网
接下来按如图所示依次点击进入。


选择自己所需要版本

此处如需下载历史版本可以点击

二、安装配置mysql

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1、登录ssh或其他相关软件上传mysql安装包

2、查看并解压刚刚上传的文件
解压命令如下：

tar -xvf mysql-8.0.28-1.el7.x86_64.rpm-bundle.tar
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3、查询是否有mariadb，如果有将其强制卸载掉
解压命令如下：

#查询命令
rpm -qa|grep mariadb
#强制卸载命令
rpm -e --nodeps maraidb-libs
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卸载后检查是否卸载干净
4、依此安装所需mysql
依次执行如下指令（各包之有依赖关系，所以要依次执行）

 rpm -ivh mysql-community-common-8.0.28-1.el7.x86_64.rpm
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 rpm -ivh mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm 
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rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm 
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rpm -ivh mysql-community-client-8.0.28-1.el7.x86_64.rpm 
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rpm -ivh mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm
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rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm 
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最后一步可能会出错如果出错可以在最后加 --force --nodeps如下：

rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm  --force --nodeps
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具体步骤如下：

[root@localhost mysql]# ls
mysql-community-client-8.0.28-1.el7.x86_64.rpm           mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm
mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm   mysql-community-libs-8.0.28-1.el7.x86_64.rpm
mysql-community-common-8.0.28-1.el7.x86_64.rpm           mysql-community-libs-compat-8.0.28-1.el7.x86_64.rpm
mysql-community-devel-8.0.28-1.el7.x86_64.rpm            mysql-community-server-8.0.28-1.el7.x86_64.rpm
mysql-community-embedded-compat-8.0.28-1.el7.x86_64.rpm  mysql-community-test-8.0.28-1.el7.x86_64.rpm
[root@localhost mysql]# rpm -ivh mysql-community-common-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-common-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-common-8.0.28-1.e################################# [100%]
[root@localhost mysql]# rpm -ivh mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-client-plugins-8.################################# [100%]
[root@localhost mysql]# rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-libs-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-libs-8.0.28-1.el7################################# [100%]
[root@localhost mysql]# rpm -ivh mysql-community-client-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-client-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-client-8.0.28-1.e################################# [100%]
[root@localhost mysql]# rpm -ivh mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-icu-data-files-8.################################# [100%]
[root@localhost mysql]# rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm 
警告：mysql-community-server-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
错误：依赖检测失败：
        /usr/bin/perl 被 mysql-community-server-8.0.28-1.el7.x86_64 需要
        net-tools 被 mysql-community-server-8.0.28-1.el7.x86_64 需要
        perl(Getopt::Long) 被 mysql-community-server-8.0.28-1.el7.x86_64 需要
        perl(strict) 被 mysql-community-server-8.0.28-1.el7.x86_64 需要
[root@localhost mysql]# rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm --force --nodeps
警告：mysql-community-server-8.0.28-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-server-8.0.28-1.e################################# [100%]
[root@localhost mysql]#
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5、初始化

mysqld --initialize --console
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6、修改安装目录的所有者和所属组，以便让mysql软件用户有权限直接使用

 chown -R mysql.mysql /var/lib/mysql/
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7、启动mysql并修改密码

• 启动mysql ： systemctl start mysqld
• 查看临时密码： cat /var/log/mysqld.log|grep localhost
• 登录mysql： mysql -uroot -p
• 输入临时密码
• 修改密码： alter user ‘root’@‘localhost’ identified by ‘root’;
• 退出重新登录： mysql -uroot -proot
  此处所有步骤如下图所示