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[Bug 1501046] Re: v2 API: Not possible to "retire" disk formats

 

So this behavior happens when glanceclient already received image information. You can at least get an info trhough API as workaround.
The root cause is in schema validation after receiving this info. Need to think more about this case.

** Project changed: glance => python-glanceclient

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

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

Status in python-glanceclient:
  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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References