Add annotations for creating OCI images from checkpoint archives

[Parthiba-Hazra]

These annotations provide metadata including the container manager, container-name, pod, namespace for creating OCI images from checkpoint archives.

[github-actions]

Test Results

55 tests  ±0   55 ✅ ±0   1s ⏱️ ±0s
 1 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 1c47bb2. ± Comparison against base commit 873b71c.

♻️ This comment has been updated with latest results.

[Parthiba-Hazra]

@rst0git @adrianreber Let's first confirm the structure of the annotation. After that, I will add additional annotations for Podman and CRI-O.

[adrianreber]

This feels redundant: checkpointctl.checkpoint. Let's remove one of those words. I think checkpointctl is not really necessary. Even if we said so earlier.

[rst0git]

@adrianreber How should we handle backward comparability with CRI-O and Podman? Do we want to deprecate the old annotations and provide support for them up to specified version, or to simply replace the annotations with a "breaking change".

[adrianreber]

@adrianreber How should we handle backward comparability with CRI-O and Podman? Do we want to deprecate the old annotations and provide support for them up to specified version, or to simply replace the annotations with a "breaking change".

For CRI-O it is relatively easy as we only use one annotation. We will just handle both (for some time or forever). For Podman I would personally do the same. No need to break anything for the annotations used by Podman. For the ones not used I would just rename them.

[rst0git]

@adrianreber PTAL

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.73%. Comparing base (6c3a263) to head (27b455e).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #127   +/-   ##
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  Coverage   78.73%   78.73%           
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  Files          11       11           
  Lines        1260     1260           
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  Hits          992      992           
  Misses        201      201           
  Partials       67       67           

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[adrianreber]

The test failure is unexpected. Seems like some project changed the minimum Go version without changing its version. Strange.

I guess we need another PR doing make vendor before we can merge this one.

[Parthiba-Hazra]

The test failure is unexpected. Seems like some project changed the minimum Go version without changing its version. Strange.

I guess we need another PR doing make vendor before we can merge this one.

@adrianreber I opened one here #133

[adrianreber]

Please rebase.