This was fixed as part of
https://review.opendev.org/c/openstack/nova/+/616777
** Changed in: nova
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1808248
Title:
Exceptions raised from _prep_block_device not included in
instance.fault
Status in OpenStack Compute (nova):
Fix Released
Bug description:
Noticed this while working on a patch, when boot-from-volume instance
build fails during the _prep_block_device step, the message in the
instance.fault looks like this during a 'nova show':
{"message": "Build of instance ec8f00c3-49a5-4ae0-9c93-1a813b17bf4c
aborted: Failure prepping block device.", "code": 500, "created":
"2018-12-12T22:06:22Z"}
where the underlying exception raised from _prep_block_device is
absent.
We can see the error message being squashed here when
BuildAbortException is raised:
https://github.com/openstack/nova/blob/c72dafad8011198b78fd906f2fc7d1126e3f79f3/nova/compute/manager.py#L2341-L2343
We can provide more information for users if we include the exception
message from the exception raised in _prep_block_device in the
BuildAbortException, which will end up in the instance.fault.
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