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Help, How to restore existing vms after host reboot?


As we all know, if host reboot since of some failure or hardware problem,
the vms will actually shutoff. But after host up, info in nova db show vm
state are "active", and using "nova list" return the same.

Now how to start the vms. In Daiblo, I always just using "nova reboot", it
works.But in essex version, it seems cannot use "nova reboot" in an
inactive domain. I see there is "nova host-action" command, but it not
always make vm start.

Another way, I can use "virsh start" a domain, but if the vm attach a
volume, it doesn't work. "nova volume-detach" cannot detach a volume in an
inactive domain.

Is there a normal way to resolve this case?


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