OCI Standard Image should support more than one layer

[jcchavezs]

Is your feature request related to a problem? Please describe.
According to the spec OCI images should only contain one layer, however some use cases where you want to annotate the images with metadata aren't supported under this spec. For example this issue and the case where a docker image can't be annotated with labels because that generates more than one layer e.g.

FROM scratch

ARG OCI_SOURCE
ARG OCI_REVISION
LABEL org.opencontainers.image.title my-image
LABEL org.opencontainers.image.source $OCI_SOURCE
LABEL org.opencontainers.image.revision $OCI_REVISION

COPY ./build/my-wasm.wasm /plugin.wasm

Describe the solution you'd like
I think a good solution would be to make the convention that the last layer is going to be extracted instead of requiring to have only one layer (or two for artifacts)

Describe alternatives you've considered
Not annotating the images which is possible but labels help to search for sources of images.

cc @nacx @mathetake @anuraaga

[kdorosh]

this seems like a reasonable feature request / proposal to me. i'm not sure when the current team will have the bandwidth to take this on, but I'd be happy to work with you on this @jcchavezs if you want to make an open source contribution.

fyi @yuval-k

[jcchavezs]

Indeed I want to contribute to this! Next week will be.

…

On Mon, 1 Aug 2022, 16:13 Kevin Dorosh, ***@***.***> wrote: this seems like a reasonable feature request / proposal to me. i'm not sure when the current team will have the bandwidth to take this on, but I'd be happy to work with you on this @jcchavezs <https://github.com/jcchavezs> if you want to make an open source contribution. fyi @yuval-k <https://github.com/yuval-k> — Reply to this email directly, view it on GitHub <#292 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAXOYAUWRR4ARGRLP7TCWYLVW7LRBANCNFSM537BUY7Q> . You are receiving this because you were mentioned.Message ID: ***@***.***>