yahoo-eng-team team mailing list archive

[OpenStack Infra <1863728@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/nova-specs/+/824044
Committed: https://opendev.org/openstack/nova-specs/commit/69ddbf090ef8c3c26aeb471a5c60bbf64536aa44
Submitter: "Zuul (22348)"
Branch:    master

commit 69ddbf090ef8c3c26aeb471a5c60bbf64536aa44
Author: Jonathan Race <jrace@xxxxxxxxxxx>
Date:   Mon Jan 10 13:13:12 2022 -0500

    Adds Pick guest CPU architecture based on host arch in libvirt driver support
    
    Implement new image meta property that allows for the selection of the
    correct QEMU binary, cpu architecture, and machine type for a guest
    architecture that is different than the host architecture; An x86_64
    guest running on an AArch64 host, and vice versa.
    
    Expanded and added content for nova scheduler and os-traits to
    be leveraged by the prefilter, and added current support for proposed
    architectures.
    
    Implements: blueprint pick-guest-arch-based-on-host-arch-in-libvirt-driver
    Closes-Bug: 1863728
    Signed-off-by: Jonathan Race <jrace@xxxxxxxxxxx>
    Change-Id: Iccfa53e06b44be3f8a70de6082fe0990b2ed23e8


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

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1863728

Title:
  Nova can't create instances for a different arch

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  This is more a wish feature than a bug but considering the use cases
  I'm surprised that it's not supported by nova.

  *Support to create instances for a different architecture than the
  host architecture*

  My use case: Running ARM instances in x86_64 compute nodes.

  This is not possible because nova always assume the host architecture.
  Also, there's different assumptions considering the different architectures.

  Some examples:
  - cpu_mode for AARC64 is passthrough (not good if trying to emulate).
  - Nova always checks the cpu_model against the host so is not possible to define an ARM cpu.
  - architecture image property is not used for defining instance domain
  (...)

  This is mostly for discussion and to see if the community is
  interested in supporting this use case.

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1863728/+subscriptions