Transfer your images docker from registry v1 to registry v2

migration.sh

#!/bin/bash 

# No verification but we need:
#        - to be able to run docker command
#        - we use jq (https://stedolan.github.io/jq/manual/)
# Transfer image to docker registry v1 to docker registry v2
# TODO manage parameters
# TODO manage insecure (actually curl -k)
# TODO manage pagination
# TODO manage namespace "library/"
# TODO manage failures
# TODO protocol (actually HTTPS)
# TODO to implement in go

v1_registry=${1-"localhost:5000"}
v2_registry=${2-"localhost:5001"}
v1_login_password=${3-":"}
v2_login_password=${4-":"}

nb=${5-200}

images=$(curl -sk "https://$v1_registry/v1/search?q=&n=$nb" | jq -r '.results | .[] | .name')

function processTag() {
        echo "-----------------------------------------"
	echo "'"$1"'" 
	echo "'"$2"'" 
	echo "'"$3"'"
	echo "-----------------------------------------" 
	for i in $2
	do
		found=false
		for j in $3
		do
			if [ "$j" == "$i" ]; then
				found=true
			fi 
		done
		if [ "$found" == "false" ]; then
			echo -e '\e[31m' $i '\e[0m'
			transfer "$v1_registry/$1:$i" "$v2_registry/$1:$i"
		fi
	done
}

function remove-prefix-library() {
  if [ "${1:0:8}" = "library/" ]; then
    echo "${1:8}"
  else
    echo $1
  fi
}

function transfer() {
       docker pull $1 || true
       docker tag  $1 $2 || true
       docker push $2 || true
       docker rmi $1 || true
       docker rmi $2 || true
}

function processImage() {
    i=${1/252F/2F}
    i=$(remove-prefix-library $i)
    old_tags=$(curl -sk "https://$v1_login_password@$v1_registry/v1/repositories/$i/tags" | jq -r 'try(keys | .[])')
    tags=$(curl -sk "https://$v2_login_password@$v2_registry/v2/$i/tags/list" | jq -r 'try(.tags | .[])')
    processTag "$(remove-prefix-library $i)" "$old_tags" "$tags"
}

for i in $images
do
	processImage "$i" 
done