Configuring Harbor Proxy Cache Retention for Images Removed from Target Registry

[AssafKatz3]

Hi,
Per documentation:
If the image is no longer in the target registry, no image is served.

Our staging environment uses Harbor to pull images from a target registry, which in this case is Amazon ECR. The ECR repository contains many temporary images that are created and then deleted as part of our development workflow.

We want Harbor to retain cached copies of these temporary images even after they are removed from the ECR registry. This would allow our staging environment to continue using these images even if they are no longer available in ECR.

Is it possible to configure Harbor's proxy cache to achieve this desired behavior?

Thanks

[stonezdj]

According to the PR: #20597, current behavior is
If the image is no longer in the target registry, the local image is served

Did you find any issue when the remote image is removed?

BTW, we will update the document to meet the current behavior.

[AssafKatz3]

@stonezdj Per my understand this PR doesn't include in any release yet, so I cannot test it.