Cut image-spec release with reference types

[lachie83]

Now that the reference types working group proposal has been merged into main, I would like to start the discussion on getting image-spec and corresponding distribution-spec releases cut. The reference types work was merged via the following PRs:

• Reference Types Working Group remaining tasks #940
• Working Group Proposal for Reference Types distribution-spec#335

There is also some cleanup work covered in the following issue - #940

In order to ease the decision of when to cut a release, I thought creating a checklist of items that must happen prior to release (release gating criteria if you will) might be a good way to make progress towards that goal. I have come up with the following list and am happy to add more items that might have been missed.

• Closure of outstanding tasks
• Conformance tests
• Sufficient Documentation
• OPTIONAL Implementation endorsements (potential list of registry providers that have agreed to implement the changes)
• Versioning agreement (if/how these changes to the image-spec constitute an API version change)

[sajayantony]

As a part of today's call this issue was brought up and corresponding voting items were opened for cutting an RC1. Once we have implementors and feedback/endorsements we can bring up the discussion for a v1.1.0 for e.g. have projects like K8s consume it was what @mikebrow suggested :)

• Vote for release of 1.1.0-rc1 of image-spec #954 was opened as a follow up to this discussion. But I would keep this issue open until the vote/tag is done :)

[lachie83]

Associated rc1 PR #953

[sajayantony]

Can we close this now that we have - https://github.com/opencontainers/image-spec/tree/v1.1.0-rc1
and - https://github.com/opencontainers/distribution-spec/tree/v1.1.0-rc1

[sajayantony]

@lachie83 - Could you link opencontainers/distribution-spec#139 as the conformance test item.

[jdolitsky]

this is meta can we close/remove?

[sajayantony]

Last pending PR before closing this #1161

[sajayantony]

Closed with #1161