Save all docker images to disk & Load archive file to docker.

load_tar_to_docker.sh

for file in $(ls *.tar); do
  echo "load $file"
  docker load -i $file
done

save_docker_images.rb

#!/usr/bin/env ruby

images = `docker images|grep -v REPOSITORY`.split("\n")
images.each do |image|
  name, version, _id, _date, _size = image.gsub(/\s+/m, ' ').strip.split(' ')

  filename = "#{name.tr('/', '_')}_#{version}.tar"
  command = "docker save #{name}:#{version} -o #{filename}"
  puts command
  system(command)
end