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[Ivan Anfimov <2092213@xxxxxxxxxxxxxxxxxx>]

Fixed after applied:
https://review.opendev.org/c/openstack/oslo.utils/+/931695

@danms thank you.

** Changed in: nova
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/2092213

Title:
  unable to rescue instance from iso

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  Unable to load instance into rescue mode. Have tried in 2 ways:

  1. Load instance from rescue image (systemrescue-11) formatted in iso,
  but soon instance falls in error with following errors:

  2024-12-19 17:55:35.478 37845 ERROR nova.compute.manager [None
  req-42940bb0-45cc-4963-83b6-69aa8689d19f
  39ef1840d2d14de49ba16ac7e11ec2c4 b6f178e22d304f99a905c31f0e374587 - -
  default default] [instance: b53ba1da-2688-476d-b2ff-1cb2f51aeb30]
  Instance failed to spawn: nova.exception.ImageUnacceptable: Image
  953dca08-ff76-410f-9bd2-1008a56c7bcb is unacceptable: Image content
  does not match disk_format

  2. Load instance from rescue image formatted in qcow2 (converted via
  qemu-img). After it instance falls in error state again, but with
  another error:

  2024-12-19 17:42:11.644 37845 ERROR nova.compute.manager [None req-
  ce660f9a-a008-476d-a74d-80a07c2231ce 39ef1840d2d14de49ba16ac7e11ec2c4
  b6f178e22d304f99a905c31f0e374587 - - default default] [instance:
  5c378e7b-fe8e-4053-a1a9-7f52cb1e3c2c] Error trying to Rescue Instance:
  oslo_utils.imageutils.format_inspector.ImageFormatError: Multiple
  formats detected: iso,gpt

  What can be the cause of it? Is it a bug or should I change some
  options in config?

  # virsh version
  Compiled against library: libvirt 10.5.0
  Using library: libvirt 10.5.0
  Using API: QEMU 10.5.0
  Running hypervisor: QEMU 9.0.0

  OpenStack version 2024.2 (Dalmatian)
  OS: Almalinux 9.5

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