参考链接:https://www.cnblogs.com/gaohongyu/p/14479497.html
执行 yum -y install keepalived 时报:The GPG keys listed for the "MySQL 8.0 Community Server" repository are already installed but they are not correct for this package.
导致 无法安装 keepalived
解决:
如果已安装 mysql8,就跳过 检查数字签名,执行 :yum -y install keepalived --nogpgcheck 进行安装
查看已安装服务列表:systemctl list-unit-files --type=service
启动:systemctl start keepalived
验证: ip addr