安装jumpserver时，yum下载mysql时报错
warning: /var/cache/yum/x86_64/7/mysql80-community/packages/mysql-community-client-8.0.28-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
在mysql下载脚本中禁掉GPG验证检查，在yum install 后加 --nogpgcheck
