RHEV-3 主机升级脚本

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engine-host-update.py 是一个用来帮助进行 RHEV 主机（RHEL-H 和 RHEV-H）升级的工具程序。根据运行这个程序时所使用的参数，它可以对一个主机进行升级，也可以对一个集群中的所有主机进行升级。当使用适当参数来运行这个程序时，这个程序会把相关主机设置为维护状态，并执行引...

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