Add a limiter for pushing images

[sa02]

In environments where multiple registries exist for the purpose of security with scan and promotion pipelines, imgpkg presents an issue where intermediate pipelines become overloaded due to the inability to properly stage.

Right now, we have a team pushing 300+ images to a pipeline that can handle 50 images at a time.

As a base solution, the ability to add a delay per image push would help significantly, in order to stagger the full deployment. Example below:

imgpkg push $IMAGE -d 10 
# -d = delay 
# 10 = 10 seconds

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[github-actions[bot]]

This issue is being marked as stale due to a long period of inactivity and will be closed in 5 days if there is no response.

[praveenrewar]

@sa02 Apologies for missing this for so many days 😞 If I understand you issue correctly, imgpkg is being used concurrently to push 300+ images to the same registry and the registry can handle only 50 pushes at a time?

[github-actions[bot]]

This issue is being marked as stale due to a long period of inactivity and will be closed in 5 days if there is no response.