Centos 8环境中用yum安装Mysql，执行到【yum install mysql-community-server -y 】时报错：

Cannot download file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql: All mirrors were tried

The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing ‘yum clean packages’.

解决方法：执行下面一行命令，再次用yum安装即可。

$ rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql

其中，RPM-GPG-KEY-mysql-2022需要替换成实际环境中遇到的报错信息，即预安装的版本。比如：

$ rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

这个路径资源就是个文本key，示例：

参考资料：https://blog.csdn.net/sdutphp/article/details/125277467