红帽全球峰会7.6. 把虚拟机导入到 Overcloud
如果您有一个已存在的 OpenStack 环境，并希望把它的虚拟机迁移到 Red Hat Enterprise Linux OpenStack Platform 环境中，请进行以下操作。
为一个运行的服务器进行快照来创建一个新的镜像，然后下载这个镜像。
nova image-create instance_name image_name glance image-download image_name --file exported_vm.qcow2
$ nova image-create instance_name image_name
$ glance image-download image_name --file exported_vm.qcow2
把导入的镜像上传到 Overcloud，然后启动一个新实例。
glance image-create --name imported_image --file exported_vm.qcow2 --disk-format qcow2 --container-format bare nova boot --poll --key-name default --flavor m1.demo --image imported_image --nic net-id=net_id imported
$ glance image-create --name imported_image --file exported_vm.qcow2 --disk-format qcow2 --container-format bare
$ nova boot --poll --key-name default --flavor m1.demo --image imported_image --nic net-id=net_id imported
重要
每个虚拟机磁盘都需要从存在的 OpenStack 环境中复制到新的 Red Hat Enterprise Linux OpenStack Platform。使用 QCOW 的快照将会丢掉它原始的层系统。
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