I was thinking of people were to use an image…:$my_tag on the host cluster and some roughe pod on the child cluster (but same underlying physical nodes) somehow overwriting the local cached :my_tag, you could do something on the parent cluster.

But I don’t fully understand what you meant with content adressed :)

Maybe one has to ensure in the host cluster that the image pull policy is set to Always or all references to images have to be based on the shasum rather than Tags.