CentOS 7 安装 MySQL 8.0 踩坑全记录与终极解决方案

一、问题复盘：从报错到根因定位

1. 初始问题：MySQL 官方源安装超时

执行命令 yum -y install https://repo.mysql.com//mysql80-community-release-el7-7.noarch.rpm 时，反复报错：

bash 复制代码

[root@iZ0jlgpxxeb31ngiadjy9gZ java]#  yum -y install https://repo.mysql.com//mysql80-community-release-el7-7.noarch.rpm
Last metadata expiration check: 4:13:36 ago on Wed 13 May 2026 07:44:59 AM CST.
[MIRROR] mysql80-community-release-el7-7.noarch.rpm: Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30000 milliseconds]
[MIRROR] mysql80-community-release-el7-7.noarch.rpm: Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30000 milliseconds]
[MIRROR] mysql80-community-release-el7-7.noarch.rpm: Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30001 milliseconds]
[MIRROR] mysql80-community-release-el7-7.noarch.rpm: Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30000 milliseconds]
[FAILED] mysql80-community-release-el7-7.noarch.rpm: Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30000 milliseconds]
Curl error (28): Timeout was reached for https://repo.mysql.com/mysql80-community-release-el7-7.noarch.rpm [Connection timed out after 30000 milliseconds]
[root@iZ0jlgpxxeb31ngiadjy9gZ java]#

二、分步解决方案：从排查到安装

测试域名解析与连接

bash 复制代码

ping repo.mysql.com
curl -v https://repo.mysql.com

如果无法 ping 通，说明服务器无法访问该域名，优先使用国内源。

失败了

使用阿里云镜像源（最稳定）

直接替换为国内镜像，彻底解决超时问题：

清理之前失败的安装

bash 复制代码

yum remove -y mysql80-community-release-el7-7.noarch

rm -rf /etc/yum.repos.d/mysql-community*

配置阿里云 MySQL 8.0 源

bash 复制代码

cat > /etc/yum.repos.d/mysql-community.repo << EOF
[mysql80-community]
name=MySQL 8.0 Community Server
baseurl=https://mirrors.aliyun.com/mysql/yum/mysql80-community/el/7/x86_64/
enabled=1
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/mysql/RPM-GPG-KEY-mysql-2022
EOF

导入 GPG 密钥并刷新缓存

bash 复制代码

rpm --import https://mirrors.aliyun.com/mysql/RPM-GPG-KEY-mysql-2022

yum clean all && yum makecache

linux 安装mysql8