Almalinux下安装mysql8：
dnf install -y https://dev.mysql.com/get/mysql80-community-release-el9-1.noarch.rpm
dnf install -y mysql-community-server
不幸收获报错：
MySQL 8.0 Community Server
GPG key at file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022 (0x3A79BD29) is already installed
The GPG keys listed for the "MySQL 8.0 Community Server" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.. Failing package is: mysql-community-client-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
Public key for mysql-community-client-plugins-8.0.46-1.el9.x86_64.rpm is not installed. Failing package is: mysql-community-client-plugins-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
Public key for mysql-community-common-8.0.46-1.el9.x86_64.rpm is not installed. Failing package is: mysql-community-common-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
Public key for mysql-community-icu-data-files-8.0.46-1.el9.x86_64.rpm is not installed. Failing package is: mysql-community-icu-data-files-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
Public key for mysql-community-libs-8.0.46-1.el9.x86_64.rpm is not installed. Failing package is: mysql-community-libs-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
Public key for mysql-community-server-8.0.46-1.el9.x86_64.rpm is not installed. Failing package is: mysql-community-server-8.0.46-1.el9.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: GPG check FAILED
之前安装都没错啊，怎么现在中奖了？
有人讲dnf install -y mysql-community-server --nogpgcheck 关闭校验就行了。然而这不是解决问题之道，绕开了坑，坑还在，迟早还得掉进行。
仔细看提示，都说了2022年的过期了，换2023年即可：
1. 导入 MySQL 最新的 GPG 密钥（2023版，解决校验失败）
rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2023
2. 清理缓存
dnf clean all
3. 重新安装 MySQL
dnf install -y mysql-community-server