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oci_load incompatible with older version of Podman #711

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nholstein opened this issue Oct 9, 2024 · 0 comments · May be fixed by #712
Open

oci_load incompatible with older version of Podman #711

nholstein opened this issue Oct 9, 2024 · 0 comments · May be fixed by #712
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@nholstein
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I'm running Bazel v7.2.0, rules_oci v2.0.0 on an Ubuntu 22.04.5 LTS system. I've installed the Ubuntu package for podman which is currently v3.4.4.

My build uses oci_load to build and import containers into podman:

oci_load(
    name = "foobar_tarball",
    image = ":foobar_image",
    repo_tags = ["foobar:latest"],
)

The resulting script fails to run:

$ bazel-out/aarch64-fastbuild/bin/foobar_tarball.sh
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
Error: payload does not match any of the supported image formats (oci, oci-archive, dir, docker-archive)
tar: Write error

Looking into the issue, this appears to be a compatibility issue with how older versions of podman implement podman load. In particular the following two commands lines work differently:

# fails with "payload does not match any of the supported image formats"
podman load --input <(tar -c $FILES)
# succeeds and loads the image
tar -c $FILES | podman load

This issue appears fixed in newer versions of podman, however I haven't tracked down the details.

The fix is relatively straightforward; to change the podman load command line oci/private/load.sh.tpl
nholstein added a commit to nholstein/rules_oci that referenced this issue Oct 9, 2024
@nholstein
fix: Support loading tarballs with older podman
ff4c4d1 
Older versions of Podman appear to handle loading a tarball differently
depending upon with the input is /dev/stdin or not. In particular:

    podman load --input <(cat foo.tar)

raises an error, while:

    cat foo.tar | podman load

works without error. (Podman loads from stdin if no --input is specified.)

This enables support for podman v3.4.4 included in Ubuntu 22.04.

fixes bazel-contrib#711
@nholstein nholstein linked a pull request Oct 9, 2024 that will close this issue
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@thesayyn thesayyn added the bug Something isn't working label Oct 15, 2024
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fix: Support loading tarballs with older podman nholstein/rules_oci
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@nholstein @thesayyn