Reviewed:  https://review.opendev.org/c/openstack/nova/+/790660
Committed: 
https://opendev.org/openstack/nova/commit/e98994027f0af0b22277bcfaed4ab6e6f4a2c74e
Submitter: "Zuul (22348)"
Branch:    master

commit e98994027f0af0b22277bcfaed4ab6e6f4a2c74e
Author: Lee Yarwood <[email protected]>
Date:   Tue May 11 11:37:22 2021 +0100

    hardware: Use image_meta.id within get_mem_encryption_constraint
    
    This change resolves bug #1928063 by replacing the use of
    image_meta.name with image_meta.id as
    I55d66c3a6cbd50da90065f4a58f77b5cd29ce9ea should ensure it is always
    available. The removal of other references to image_meta.name within
    virt.hardware is left for follow ups to keep this change small and
    backportable.
    
    Closes-Bug: #1928063
    Change-Id: I66299e97bdb5b95e149b1780231a1c1bbdbd9865


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1928063

Title:
  SEV enabled instance unable to hard reboot

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  Description
  ===========

  Hard rebooting a SEV enabled instance fails with a NotImplementedError
  raised as the image_meta stashed in the system_metadata of the
  instance doesn't contain the image name or id:

  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/compute/manager.py", line 3739, in 
_reboot_instance
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     
bad_volumes_callback=bad_volumes_callback)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 3292, in 
reboot
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     
block_device_info)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 3386, in 
_hard_reboot
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     mdevs=mdevs)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 6331, in 
_get_guest_xml
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     context, mdevs)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 5949, in 
_get_guest_config
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     flavor, 
image_meta)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 5504, in 
_get_guest_memory_backing_config
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     if 
self._sev_enabled(flavor, image_meta):
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 6117, in 
_sev_enabled
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     mach_type)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/nova/virt/hardware.py", line 1271, in 
get_mem_encryption_constraint
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     image_meta.name)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/oslo_versionedobjects/base.py", line 67, in 
getter
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     
self.obj_load_attr(name)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python3.6/site-packages/oslo_versionedobjects/base.py", line 603, in 
obj_load_attr
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server     _("Cannot load 
'%s' in the base class") % attrname)
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server 
NotImplementedError: Cannot load 'name' in the base class
  2021-05-10 16:50:24.847 7 ERROR oslo_messaging.rpc.server

  Steps to reproduce
  ==================

  Hard reboot a SEV enabled instance.

  
  Expected result
  ===============

  Instance hard reboots as expected.

  Actual result
  =============

  Instance fails to reboot with a NotImplementedError exception raised.

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

     stable/train but likely the same on master.

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

     libvirt + KVM
    
  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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