Cache xpkg.upbound.io registry

[IvanJosipovic]

What is the problem you're trying to solve Unable to add xpkg.upbound.io to the ACR Cache Rules.

"Unsupported upstream or login server 'xpkg.upbound.io/*' provided. Supported upstreams or login servers are: docker.io, mcr.microsoft.com, quay.io, public.ecr.aws, ghcr.io, nvcr.io, registry.k8s.io, gcr.io, eu.gcr.io."

Describe the solution you'd like The ability to use ACR Cache with the xpkg.upbound.io repository.

Additional context https://github.com/Azure/acr/issues/686

[JXavierMSFT]

Hey @IvanJosipovic ,

Thank you for this request. We are evaluating if we can add xpkg.upbound.io. Is there any additional registries would like to see supported?

[JanKnipp]

i would like to request a more generic way to add registries. In my case it would be docker.elastic.co but i guess there are more and more companies that add their own registries since docker started the throttling of pulls.