You need a containerd on the remote end (Docker and Kubernetes use containerd) and anything that speaks registry API (OCI Distribution spec: https://github.com/

You need a containerd on the remote end (Docker and Kubernetes use containerd) and anything that speaks registry API (OCI Distribution spec: https://github.com/opencontainers/distribution-spec https://github.com/opencontainers/distribution-spec) on the client. Unregistry reuses the official Docker registry code for the API layer so it looks and feels like https://hub.docker.com/_/registry https://hub.docker.com/_/registry You can use skopeo, crane, regclient, BuildKit, anything that speaks OCI-registry on the client. Although you will need to manually run unregistry on the remote host to use them. 'docker pussh' command just automates the workflow using the local Docker. Just check it out, it's a bash script: https://github.com/psviderski/unregistry/blob/main/docker-pussh https://github.com/psviderski/unregistry/blob/main/docker-pu... You can hack your own way pretty easily.