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[Bug 1831538] [NEW] IDE config drive CDROM doesn't work with q35 machine type

 

Public bug reported:

Description
===========

Setting [libvirt]/hw_machine_type=x86_64=q35 in nova-cpu.conf results in
any instances booted with a config drive to fail to spawn.

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

1. Set [libvirt]/hw_machine_type=x86_64=q35 in nova-cpu.conf
2. Boot an instance with a config drive

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

Instance boots correctly.

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

Instance fails to spawn with following error in the compute log:

libvirt.libvirtError: unsupported configuration: IDE controllers are
unsupported for this QEMU binary or machine type

Environment
===========

This was reported on OSP15 CI [1] and has been reproduced upstream [2].

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1716358
[2] https://review.opendev.org/#/c/662887/

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1831538

Title:
  IDE config drive CDROM doesn't work with q35 machine type

Status in OpenStack Compute (nova):
  New

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

  Setting [libvirt]/hw_machine_type=x86_64=q35 in nova-cpu.conf results
  in any instances booted with a config drive to fail to spawn.

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

  1. Set [libvirt]/hw_machine_type=x86_64=q35 in nova-cpu.conf
  2. Boot an instance with a config drive

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

  Instance boots correctly.

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

  Instance fails to spawn with following error in the compute log:

  libvirt.libvirtError: unsupported configuration: IDE controllers are
  unsupported for this QEMU binary or machine type

  Environment
  ===========

  This was reported on OSP15 CI [1] and has been reproduced upstream
  [2].

  [1] https://bugzilla.redhat.com/show_bug.cgi?id=1716358
  [2] https://review.opendev.org/#/c/662887/

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