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Description
Pre-requisites:
1) LVM backend must be configured and enabled.
2) Volume type LVM must be created beforehand.
3) More than one image must be present in Openstack host.
Steps to Reproduce:
1. Navigate to Devstack Host CLI.
2. Run the command to create a bootable volume <volume1>:
$cinder create --image <image> --name <name> --volume-type <volume-type>
<size>
3. Create a volume <volume2> without selecting volume source.
$cinder create --name <volume_name> --volume-type <volume-type> <size>
4. Launch an instance booting from volume1.
$nova boot --flavor <flavor> --boot-volume <volume_id> <name>
5. Attach the volume2 to an instance.
$nova volume-attach <server> <volume> [<device>]
6. Rebuild the instance with different image.
$nova rebuild <server> <image>
7. Detach volume2 from instance.
$nova volume-detach <server> <volume2>
Expected Result:
1. Volume2 should be detached.
Observed Results:
1. Volume detach failed.
Additional Details:
1) This scenario was performed on Devstack (Newton) setup.
3) n-cpu logs are attached
n-cpu Traces:
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall Traceback (most recent
call last):
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/usr/local/lib/python2.7/dist-packages/oslo_service/loopingcall.py", line 136,
in _run_loop
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall result =
func(*self.args, **self.kw)
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/usr/local/lib/python2.7/dist-packages/oslo_service/loopingcall.py", line 377,
in _func
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall return
self._sleep_time
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in
__exit__
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall self.force_reraise()
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in
force_reraise
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall
six.reraise(self.type_, self.value, self.tb)
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/usr/local/lib/python2.7/dist-packages/oslo_service/loopingcall.py", line 356,
in _func
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall result = f(*args,
**kwargs)
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall File
"/opt/stack/nova/nova/virt/libvirt/guest.py", line 394, in
_do_wait_and_retry_detach
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall reason=reason)
2017-01-19 03:10:56.006 TRACE oslo.service.loopingcall DeviceDetachFailed:
Device detach failed for vdb: Unable to detach from guest transient domain.
** Affects: nova
Importance: Undecided
Status: New
--
LVM : Volume detach failed after rebuilding instance to different nova image.
https://bugs.launchpad.net/bugs/1657718
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