红帽全球峰会3.10. 取消镜像注册
最后，取消注册镜像。因此，Overcloud 部署过程可以将镜像部署到您的节点上，并分别注册它们。
virt-customize -a overcloud-full.qcow2 --run-command 'subscription-manager unregister'
$ virt-customize -a overcloud-full.qcow2 --run-command 'subscription-manager unregister'
[ 0.0] Examining the guest ...
[ 11.0] Setting a random seed
[ 11.0] Running: subscription-manager unregister
[ 17.0] Finishing off
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