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[Lee Yarwood <1945452@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Description
===========
$subject

$ openstack volume show 02a27e61-b242-460e-8cf6-8525c5353698 -f json -c multiattach
{
  "multiattach": true
}
$ nova-manage volume_attachment show 74adb548-f3ed-4d68-b282-b278dd1ec3f2 02a27e61-b242-460e-8cf6-8525c5353698 --json --connection_info 
Unexpected error, see nova-manage.log for the full trace: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation. 
ERROR nova.cmd.manage [None req-d989b05f-5747-4840-99b6-892443a3ac35 None None] Unexpected error: nova.exception.VolumeBDMIsMultiAttach: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation.
ERROR nova.cmd.manage Traceback (most recent call last):
ERROR nova.cmd.manage   File "/opt/stack/nova/nova/cmd/manage.py", line 2872, in show
ERROR nova.cmd.manage     bdm = objects.BlockDeviceMapping.get_by_volume(
ERROR nova.cmd.manage   File "/usr/local/lib/python3.8/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper
ERROR nova.cmd.manage     result = fn(cls, context, *args, **kwargs)
ERROR nova.cmd.manage   File "/opt/stack/nova/nova/objects/block_device.py", line 294, in get_by_volume
ERROR nova.cmd.manage     raise exception.VolumeBDMIsMultiAttach(volume_id=volume_id)
ERROR nova.cmd.manage nova.exception.VolumeBDMIsMultiAttach: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation.
ERROR nova.cmd.manage 


Steps to reproduce
==================
* nova-manage volume_attachment show against a multiattach volume

Expected result
===============
Command completes successfully.

Actual result
=============
Command fails as the wrong DB BDM lookup method is used.

Environment
===========
1. Exact version of OpenStack you are running. See the following
  list for all releases: http://docs.openstack.org/releases/

   master

2. Which hypervisor did you use?
   (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
   What's the version of that?

   libvirt

2. Which storage type did you use?
   (For example: Ceph, LVM, GPFS, ...)
   What's the version of that?

   N/A

3. Which networking type did you use?
   (For example: nova-network, Neutron with OpenVSwitch, ...)

   N/A

Logs & Configs
==============

** Affects: nova
     Importance: Undecided
     Assignee: Lee Yarwood (lyarwood)
         Status: New


** Tags: nova-manage volumes

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https://bugs.launchpad.net/bugs/1945452

Title:
  nova-manage volume_attachment show against a multiattach volume fails

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  $subject

  $ openstack volume show 02a27e61-b242-460e-8cf6-8525c5353698 -f json -c multiattach
  {
    "multiattach": true
  }
  $ nova-manage volume_attachment show 74adb548-f3ed-4d68-b282-b278dd1ec3f2 02a27e61-b242-460e-8cf6-8525c5353698 --json --connection_info 
  Unexpected error, see nova-manage.log for the full trace: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation. 
  ERROR nova.cmd.manage [None req-d989b05f-5747-4840-99b6-892443a3ac35 None None] Unexpected error: nova.exception.VolumeBDMIsMultiAttach: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation.
  ERROR nova.cmd.manage Traceback (most recent call last):
  ERROR nova.cmd.manage   File "/opt/stack/nova/nova/cmd/manage.py", line 2872, in show
  ERROR nova.cmd.manage     bdm = objects.BlockDeviceMapping.get_by_volume(
  ERROR nova.cmd.manage   File "/usr/local/lib/python3.8/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper
  ERROR nova.cmd.manage     result = fn(cls, context, *args, **kwargs)
  ERROR nova.cmd.manage   File "/opt/stack/nova/nova/objects/block_device.py", line 294, in get_by_volume
  ERROR nova.cmd.manage     raise exception.VolumeBDMIsMultiAttach(volume_id=volume_id)
  ERROR nova.cmd.manage nova.exception.VolumeBDMIsMultiAttach: Block Device Mapping 02a27e61-b242-460e-8cf6-8525c5353698 is a multi-attach volume and is not valid for this operation.
  ERROR nova.cmd.manage 

  
  Steps to reproduce
  ==================
  * nova-manage volume_attachment show against a multiattach volume

  Expected result
  ===============
  Command completes successfully.

  Actual result
  =============
  Command fails as the wrong DB BDM lookup method is used.

  Environment
  ===========
  1. Exact version of OpenStack you are running. See the following
    list for all releases: http://docs.openstack.org/releases/

     master

  2. Which hypervisor did you use?
     (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
     What's the version of that?

     libvirt

  2. Which storage type did you use?
     (For example: Ceph, LVM, GPFS, ...)
     What's the version of that?

     N/A

  3. Which networking type did you use?
     (For example: nova-network, Neutron with OpenVSwitch, ...)

     N/A

  Logs & Configs
  ==============

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