oci layers on top

1. use simple tool like skopeo ( or oras cp, or ...) and produce an oci image layout of the base image for the Modelcar (ie base image could be: A. ubi-micro, B. busybox, or C. even simple base image for KServe Modelcar, etc.)
2. (this project) use pure python way to add layers of the ML models, and any metadata like ModelCarD
3. use simple tool from step 1 to push the resulting layout to the remote registry (i.e. simpletool cp ... quay.io/mmortari/model:car)
4. ... you now have a Modelcar inside of your OCI registry that can be used with KServe and more!

Dev Notes

rm -rf download && skopeo copy --multi-arch all docker://quay.io/mmortari/hello-world-wait:latest oci:download:latest

# oras copy --to-oci-layout quay.io/mmortari/hello-world-wait:latest ./download:latest
# chmod +w download/blobs/sha256/*

poetry run olot download tests/data/sample-model/model.joblib tests/data/sample-model/README.md

skopeo copy --multi-arch all oci:download:latest docker://quay.io/mmortari/demo20241208:latest

demo

podman run --rm -it quay.io/mmortari/demo20241208 /bin/sh
Trying to pull quay.io/mmortari/demo20241208:latest...
Getting image source signatures
Copying blob sha256:6163eebc9af40cdf3451c0de779eccf4a919d56cd3dd22b57bbcaafb5b07d349
Copying blob sha256:1933e30a3373776d5c7155591a6dacbc205cf6a2665b6dced682c6d2ea7b000f
Copying blob sha256:3dc1903f1fc892d372d30bc05ed7c01dd6aceff05a1917eb2fc5618bfd6ef350
Copying config sha256:37ac52c72d78301fce323e652c00326faee7975837f291acef2ce56a262fc53d
Writing manifest to image destination
/ # ls -la /models/
total 12
drwxr-xr-x    1 root     root            23 Jan 23 16:40 .
dr-xr-xr-x    1 root     root            63 Jan 23 16:40 ..
-rw-rw-r--    1 root     root          6625 Dec 24 09:24 README.md
-rw-rw-r--    1 root     root          3299 Dec 24 09:24 model.joblib

or even

oras cp --from-oci-layout ./download:latest quay.io/mmortari/demo20241208:latest

demo

podman run --rm -it quay.io/mmortari/demo20241208 /bin/sh
Trying to pull quay.io/mmortari/demo20241208:latest...
Getting image source signatures
Copying blob sha256:a29b139a2e0d0eb615fd1e2d51475834a404f1e2f440784079c7184bdc241289
Copying blob sha256:1933e30a3373776d5c7155591a6dacbc205cf6a2665b6dced682c6d2ea7b000f
Copying blob sha256:3afebe9995515e0bd99890d996ad1aa6340cb9f0f125185011e90882d14b5431
Copying config sha256:f445c8c153c95885e059a66366922c7d5173da0b5c4ceef6f61f005b58b4a0c1
Writing manifest to image destination
/ # ls -la /models
total 8
drwxr-xr-x    1 root     root            23 Dec  8 21:56 .
dr-xr-xr-x    1 root     root            63 Dec  8 21:56 ..
-rw-r--r--    1 501      20             389 Dec  8 21:34 README.md
-rw-r--r--    1 501      20            3299 Dec  8 15:37 model.joblib
/ # exit

podman image rm quay.io/mmortari/demo20241208:latest