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[Bug 2129996] [NEW] No way of retrieving instance architecture in certain cases

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Giuseppe Petralia <2129996@xxxxxxxxxxxxxxxxxx>
Date: Tue, 28 Oct 2025 08:57:26 -0000
Reply-to: Bug 2129996 <2129996@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

In multi CPU architectures clouds, there is sometime the need of knowing
the CPU architecture of an instance, i.e. to know if the instance
supports live migration or not.

Right now architecture is only a property of glance image [0] To know
the architecture of a VM using OpenStack API only, the only way is then
to query the image and looks for the architecture property.

If the image is gone from Glance, there is no way of retrieving this
information from the API.

It would be good if instance table will have an additional field to
specify the CPU architecture of the VM and expose it via `openstack
server show <uuid>`


Links

0. https://docs.openstack.org/glance/latest/admin/useful-image-
properties.html#image-property-keys-and-values

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2129996

Title:
  No way of retrieving instance architecture in certain cases

Status in OpenStack Compute (nova):
  New

Bug description:
  In multi CPU architectures clouds, there is sometime the need of
  knowing the CPU architecture of an instance, i.e. to know if the
  instance supports live migration or not.

  Right now architecture is only a property of glance image [0] To know
  the architecture of a VM using OpenStack API only, the only way is
  then to query the image and looks for the architecture property.

  If the image is gone from Glance, there is no way of retrieving this
  information from the API.

  It would be good if instance table will have an additional field to
  specify the CPU architecture of the VM and expose it via `openstack
  server show <uuid>`


  Links

  0. https://docs.openstack.org/glance/latest/admin/useful-image-
  properties.html#image-property-keys-and-values

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