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Message #17696
[Bug 1322180] Re: Fail to launch an instance from volume by legacy bdm
** Changed in: nova
Status: Fix Committed => Fix Released
** Changed in: nova
Milestone: None => juno-2
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https://bugs.launchpad.net/bugs/1322180
Title:
Fail to launch an instance from volume by legacy bdm
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
Launting an instance from bootable volume passing legacy bdm is
available only using vda (no /dev/ prefix) as root device name. This
is weird restriction. It prevents to create consistent instance data,
because root_device_name instance attribute has /dev/ prefix, but
device_name bdm attribute doesn't.
Environment: DevStack
Steps to reproduce:
1 Create bootable volume
$ cinder create --image-id xxx 1
Note: I used cirros-0.3.2-x86_64-uec ami image.
2 Boot instance from the volume by legacy bdm.
$ nova boot --flavor m1.nano --block-device-mapping /dev/vda=yyy:::1 inst
3 Wait instance status Active, go to instance console and look to 'No
bootable device' message.
The reason is in _get_bdm_image_metadata in nova/compute/api.py. There only 'vda' devices are processed as root device for legacy bdm.
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References