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changes.mady.by.user Stephen Foulds

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Umoci is an official opencontainers (formally OpenSUSE) tool that can manipulate downloaded OCI images and convert them to OCI bundles. Written in Go unfortunately, so would not be suitable for running on an STB, but should be fine for use in a cloud environment. 

Umoci is also designed to be a secure mechanism for unpacking images - see here for more info on umoci's security: https://github.com/opencontainers/umoci/blob/master/doc/site/reference/security.md

Example:

Code Block
% skopeo copy docker://opensuse/amd64:42.2 oci:opensuse:42.2 # Obtain the image from the docker hub using Skopeo
% sudo umoci unpack --image opensuse:42.2 bundle
% ls -l bundle
total 720
-rw-r--r-- 1 root root   3247 Jul  3 17:58 config.json
drwxr-xr-x 1 root root    128 Jan  1  1970 rootfs
-rw-r--r-- 1 root root 725320 Jul  3 17:58 sha256_8eac95fae2d9d0144607ffde0248b2eb46556318dcce7a9e4cc92edcd2100b67.mtree
-rw-r--r-- 1 root root    270 Jul  3 17:58 umoci.json

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