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Hi Gaëtan,

Glance team doesn't recommend to use OSC anymore.
I will recommend you to check the same behaviour using python-glanceclient.

Thanks & Best Regards,

Abhishek Kekane


On Sat, Feb 29, 2020 at 3:54 AM Monty Taylor <mordred at inaugust.com> wrote:

>
>
> > On Feb 28, 2020, at 4:15 PM, gaetan.trellu at incloudus.com wrote:
> >
> > Hey Monty,
> >
> > If I download the image via the CLI, the checksum of the file matches
> the checksum from the image details.
> > If I download the image via "curl", the "Content-Md5" header matches the
> image details but the file checksum doesn't.
> >
> > The files have the same size, this is really weird.
>
> WOW.
>
> I still don’t know the issue - but my unfounded hunch is that the curl
> command is likely not doing something it should be. If OSC is producing a
> file that matches the image details, that seems like the right choice for
> now.
>
> Seriously fascinating though.
>
> > Gaëtan
> >
> > On 2020-02-28 17:00, Monty Taylor wrote:
> >>> On Feb 28, 2020, at 2:29 PM, gaetan.trellu at incloudus.com wrote:
> >>> Hi guys,
> >>> Does anyone know why the md5 checksum is different between the
> "openstack image save" CLI and "curl" commands?
> >>> During the image creation a checksum is computed to check the image
> integrity, using the "openstack" CLI match the checksum generated but when
> "curl" is used by following the API documentation[1] the checksum change at
> every "download".
> >>> Any idea?
> >> That seems strange. I don’t know off the top of my head. I do know
> >> Artem has patches up to switch OSC to using SDK for image operations.
> >> https://review.opendev.org/#/c/699416/
> >> That said, I’d still expect current OSC checksums to be solid. Perhaps
> >> there is some filtering/processing being done cloud-side in your
> >> glance? If you download the image to a file and run a checksum on it -
> >> does it match the checksum given by OSC on upload? Or the checksum
> >> given by glance API on download?
> >>> Thanks,
> >>> Gaëtan
> >>> [1]
> https://docs.openstack.org/api-ref/image/v2/index.html?expanded=download-binary-image-data-detail#download-binary-image-data
> >
>
>
>
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