Dockerfile

# Docker image downloader

# download Docker images without Docker installed

FROM docker:edge

RUN apk add --no-cache bash curl ca-certificates jq go

ADD https://raw.githubusercontent.com/moby/moby/master/contrib/download-frozen-image-v2.sh /bin/download-frozen-image

RUN chmod 755 /bin/download-frozen-image

WORKDIR /work

#ENTRYPOINT ["/bin/download-frozen-image"]

run.sh

#! /bin/bash

# https://devops.stackexchange.com/questions/2731/downloading-docker-images-from-docker-hub-without-using-docker

set -e

id=$(docker build --quiet -t download-frozen-image:latest .)

if [[ $# -eq 0 ]]; then
    docker run --rm -ti -v $PWD:/work -v /var/run/docker.sock:/var/run/docker.sock ${id}
else
    docker run --rm -ti -v $PWD:/work ${id} download-frozen-image $@
fi