Comment by shykes

My only regret is that so many users had to run local docker registries on each node of their cluster, then write `FROM localhost:1234/myimage` in all their Dockerfiles - all to avoid unnecessary re-fetching of remote images. My goal was to make image distribution a native feature of the cluster, so that you wouldn't have to choose between portable Dockerfiles and proper image caching. But Kubernetes ended up dominating the cluster layer, and as far as design goes, we were not invited to that table. So as far as I know, the problem was never solved, at least universally for all Docker users.