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Story #3497

Updated by ipanova@redhat.com over 2 years ago

*Motivation:*

To save bandwidth and improve efficiency, layers referred to in a skopeo tar manifest.json that already exist should be allowed to be omitted from the tar.

As I am implementing "docker push" and "skopeo copy docker:", both tools first check if a layer exists before attempting to push it. Since pulp expects all the layers to be part of the upload this leads to having to get the layer from pulp, add it to the tar file, then give tar file to pulp.

*Solution:*

The upload API will support uploading archives that contain only a subset of layers needed to create the full container image. Archive must contain container manifest.json file. When such an archive is uploaded to Pulp, it will be added to the repository only if the missing layers are already present in the repository. If the layers are missing from both the archive being uploaded and repository the upload will fail.

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