查看虚拟机ID
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[root@node1 ~]# nova list --all | grep wyl
| dc828fed-1c4f-4e5d-ae84-795a0e71eecc | wyl  | ac33d3bc8fe54f52a2cc822adec7fe62 | ACTIVE | -          | Running     | provider=192.168.16.13 |
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 创建快照
 格式:
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rbd snap create {pool-name}/{image-name}@{snap-name}
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rbd snap create  vms/dc828fed-1c4f-4e5d-ae84-795a0e71eecc_disk@init
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 关闭虚拟机
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nova stop dc828fed-1c4f-4e5d-ae84-795a0e71eecc
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 回滚快照
 格式:
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rbd snap rollback {pool-name}/{image-name}@{snap-name}
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rbd snap rollback   vms/dc828fed-1c4f-4e5d-ae84-795a0e71eecc_disk@init
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 启动虚拟机
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nova start  dc828fed-1c4f-4e5d-ae84-795a0e71eecc

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