Pull all images+tags belonging to $repo on $old registry, tag the images with $new registry name, push all images to $new registry, and delete the images after

docker-migrate.sh

#!/bin/bash
$old=old.registry.net:5000
$new=new.registry.net:5000
$repo=""

# Batch pull, tag, push, delete
batch() {
  for x in `wget -q http://$old/v2/_catalog -O - | sed -e 's/[][]//g' -e 's/\,/\n/g' -e 's/\"//g' -e 's/\}//g' | grep $repo | tr '\n' ' '`; do docker pull $old/$x -a; done
  docker images | grep $old | awk -F' ' '{ print $1":"$2 }' | awk -F '/' '{ print "docker tag "$1"/"$2"/"$3" $new/"$2"/"$3 }' | xargs -L 1 xargs
  docker images | grep $new | awk -F' ' '{ print $1":"$2 }' | awk -F '/' '{ print "docker push "$1"/"$2"/"$3 }' | xargs -L 1 xargs
  docker images | grep $old | awk -F' ' '{ print "docker rmi -f " $3 }' | xargs -L 1 xargs
}

# Pull 1 image at a time, tag, push, delete
stream() {
  for x in `wget -q http://$old/v2/_catalog -O - | sed -e 's/[][]//g' -e 's/\,/\n/g' -e 's/\"//g' -e 's/\}//g' | grep $repo | tr '\n' ' '`; do 
    docker pull $old/$x -a
    docker images | grep $old/$x | awk -F' ' '{ print $1":"$2 }' | awk -F '/' '{ print "docker tag "$1"/"$2"/"$3" $new/"$2"/"$3 }' | xargs -L 1 xargs
    docker images | grep $new/$x | awk -F' ' '{ print $1":"$2 }' | awk -F '/' '{ print "docker push "$1"/"$2"/"$3 }' | xargs -L 1 xargs
    docker images | grep $x | awk -F' ' '{ print "docker rmi -f " $3 }' | xargs -L 1 xargs
  done
}

main() {
  echo "[========================]"
  echo "Batch or Stream migration?"
  echo "[========================]"
  read -p "Enter: " bs
  case $bs in
    [bB]* )
      batch;;
    [sS]* )
      stream;;
     * ) exit 1;;
  esac
}

main