yahoo-eng-team team mailing list archive

[Nicolas Simonds <1501046@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Use case:

We tried to remove QCOW2 from the list of supported disk_formats in some
of our deployments, because the conversion overhead of using them was
making for a sub-wonderful user experience.

After removing "qcow2" from the disk_formats parameter, the Glance v2
API started returning 404 errors on extant QCOW2 images.  This means
that we effectively cannot "retire" this disk format and block new image
uploads, since Glance will immediately disavow all knowledge of any
QCOW2 images in its purview.

Steps to Reproduce:

    1.  Stand up a devstack
    2.  Upload a QCOW2 image
    3.  glance --os-image-api-version 2 image-show IMAGE_ID
    4.  Reconfigure glance-api to only allow e.g., "raw" disk_formats:
        [image_format]
        disk_formats = raw,ami,ari,aki,iso
    5.  Restart glance-api
    6. glance --os-image-api-version 2 image-show IMAGE_ID

Expected results:

The "glance image-show" command works both times

Actual results:

The second "glance image-show" command fails.

Errata:

The "glance image-show" using the v1 API does work as expected.

** Affects: glance
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1501046

Title:
  v2 API: Not possible to "retire" disk formats

Status in Glance:
  New

Bug description:
  Use case:

  We tried to remove QCOW2 from the list of supported disk_formats in
  some of our deployments, because the conversion overhead of using them
  was making for a sub-wonderful user experience.

  After removing "qcow2" from the disk_formats parameter, the Glance v2
  API started returning 404 errors on extant QCOW2 images.  This means
  that we effectively cannot "retire" this disk format and block new
  image uploads, since Glance will immediately disavow all knowledge of
  any QCOW2 images in its purview.

  Steps to Reproduce:

      1.  Stand up a devstack
      2.  Upload a QCOW2 image
      3.  glance --os-image-api-version 2 image-show IMAGE_ID
      4.  Reconfigure glance-api to only allow e.g., "raw" disk_formats:
          [image_format]
          disk_formats = raw,ami,ari,aki,iso
      5.  Restart glance-api
      6. glance --os-image-api-version 2 image-show IMAGE_ID

  Expected results:

  The "glance image-show" command works both times

  Actual results:

  The second "glance image-show" command fails.

  Errata:

  The "glance image-show" using the v1 API does work as expected.

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