[pkg-go] Bug#1033826: podman: Cannot load gzip compressed images

[Reinhard Tartler]

Control: reassign -1 golang-github-klauspost-pgzip 1.2.5-2
Control: affects -1 libpod
Control: forwarded -1 https://github.com/containers/podman/issues/15944
Control: severity -1 important

Hi Antonio,

Thanks for your report.

I've looked through the source code, and while the exact error message
doesn't exactly match, I did confirm that the current debian/sid podman is
indeed built with golang 1.19, and uses an older version of
klauspost/pgzip that doesn't have that code change from
https://github.com/klauspost/pgzip/pull/50. I'd argue it is necessary for
golang 1.19.

In order to fix this, the code change needs to go into pgzip and libpod
needs to be rebuilt.

-rt

On Sun, Apr 2, 2023 at 6:51 AM Antonio Cebrián <ancebfer at gmail.com> wrote:

> Package: podman
> Version: 4.3.1
>
>
> Podman cannot load images compressed with gzip. Uncompressed images or
> bzip2 compressed images work right therefore it seems to be a problem
> related to gzip handling.
>
> It seems to be the same problem reported here:
>
> https://github.com/containers/podman/issues/15944
>
>
> Tested under Bookworm with podman 4.3.1:
>
> *$ podman image pull hello-world:latest*
> Resolved "hello-world" as an alias
> (/etc/containers/registries.conf.d/shortnames.conf)
> Trying to pull docker.io/library/hello-world:latest...
> Getting image source signatures
> Copying blob 2db29710123e done
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> feb5d9fea6a5e9606aa995e879d862b825965ba48de054caab5ef356dc6b3412
>
> *$ podman image save hello-world:latest > hello-world.tar*
>
> *$ podman image save hello-world:latest | gzip > hello-world.tar.gz*
>
> *$ podman image save hello-world:latest | bzip2 > hello-world.tar.bz2*
>
> *$ podman image load -i hello-world.tar*
> Getting image source signatures
> Copying blob e07ee1baac5f skipped: already exists
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> Loaded image: docker.io/library/hello-world:latest
>
> *$ podman image load -i hello-world.tar.gz*
> Error: payload does not match any of the supported image formats:
>  * oci: initializing source oci:hello-world.tar.gz:: open
> hello-world.tar.gz/index.json: not a directory
>  * oci-archive: loading index: open /var/tmp/oci3062655986/index.json: no
> such file or directory
>  * docker-archive: loading tar component manifest.json: unexpected EOF
>  * dir: open hello-world.tar.gz/manifest.json: not a directory
>
> *$ podman image load -i hello-world.tar.bz2*
> Getting image source signatures
> Copying blob e07ee1baac5f skipped: already exists
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> Loaded image: docker.io/library/hello-world:latest
>
>
> Attached you have the debug output of the failing command:
>
> *$ podman --debug image load -i hello-world.tar.gz*
>
>
> In Bullseye with podman 3.0.1 all works as expected:
>
> *$ podman image pull hello-world:latest*
> Resolved "hello-world" as an alias
> (/etc/containers/registries.conf.d/shortnames.conf)
> Trying to pull docker.io/library/hello-world:latest...
> Getting image source signatures
> Copying blob 2db29710123e done
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> feb5d9fea6a5e9606aa995e879d862b825965ba48de054caab5ef356dc6b3412
>
> *$ podman image save hello-world:latest > hello-world.tar*
> Copying blob e07ee1baac5f done
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
>
> *$ podman image save hello-world:latest | gzip > hello-world.tar.gz*
> Copying blob e07ee1baac5f done
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
>
> *$ podman image save hello-world:latest | bzip2 > hello-world.tar.bz2*
> Copying blob e07ee1baac5f done
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
>
> *$ podman image load -i hello-world.tar*
> Getting image source signatures
> Copying blob e07ee1baac5f [--------------------------------------] 0.0b /
> 0.0b
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> Loaded image(s): docker.io/library/hello-world:latest
>
> *$ podman image load -i hello-world.tar.gz*
> Getting image source signatures
> Copying blob e07ee1baac5f skipped: already exists
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> Loaded image(s): docker.io/library/hello-world:latest
>
> *$ podman image load -i hello-world.tar.bz2*
> Getting image source signatures
> Copying blob e07ee1baac5f [--------------------------------------] 0.0b /
> 0.0b
> Copying config feb5d9fea6 done
> Writing manifest to image destination
> Storing signatures
> Loaded image(s): docker.io/library/hello-world:latest
>
>
> Best regards.
>
>

-- 
regards,
    Reinhard
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://alioth-lists.debian.net/pipermail/pkg-go-maintainers/attachments/20230412/cdb506d6/attachment.htm>