Dear jichenjc :
I've done it, thanks.
** No longer affects: nova
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1472900
Title:
instance boot from image(creates a new volume) deploy failed when
volume rescheduling to other backends
Status in Cinder:
New
Bug description:
This bug happens in Icehouse and Kilo version of openstack.
I launched instance on web by " boot from image(creates a new volume)",
it failed and raise "Invalid volume", and I check cinder list, found the volume
is rescheduled and created success.
I reviewed the code of cinder volume, found that when volume create
failed on one backends, the volume create workflow will revert, which will set
the volume status "creating" and reschedule, and then set the volume status
"error", volume rescheduled to other backends and then set status
"downloading", "available".
In the process of launching instances, nova wait the volume status in
function "_await_block_device_map_created", it returned when volume status in
"available" and "error", when volume rescheduling happend, it will return with
volume in "error" state, and then raise "Invalid volume" in function
check_attach when volume attach.
it suggests that when volume is rescheduling, volume status will be set
to "rescheduling", without setting to "error" state in wokrflow revert, which
make the volume status precise to other components.
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