Push private docker hub images to Cloud Foundry

docker-private-push.sh

#!/bin/bash

if [ -z $3 ]; then
  echo "Usage: $0 <app> <image> <start command>"
  exit 1
fi

# Dockerhub details
echo "Login with your Docker ID."
echo -n "Username: "
read USER
echo -n "Email: "
read MAIL
echo -n "Password: "
read -s PASS

# CF details
DOMAIN=`cf api | awk '{print $3}' | awk -F/ '{print $3}' | sed "s/^api.//"`
SPACE=`cf target | grep Space | awk '{print $2}'`
SPACE_GUID=`cf space $SPACE --guid`

DATA="{
	\"name\": \"$1\",
	\"memory\": 1024,
	\"instances\": 1,
	\"disk_quota\": 1024,
	\"space_guid\": \"$SPACE_GUID\",
	\"docker_image\": \"$2\",
	\"docker_credentials_json\" : {
		\"docker_user\" : \"$USER\",
		\"docker_password\" : \"$PASS\",
		\"docker_email\" : \"$MAIL\"
	},
	\"command\": \"$3\",
	\"diego\": true
}"

cf curl /v2/apps -X POST -d "$DATA"
cf map-route $1 $DOMAIN -n $1
cf set-env $1 DIEGO_DOCKER_CACHE true
cf start $1

This results in:

builder exited with error: failed to fetch metadata from [covisintrnd/test-private-image] with tag [latest] and insecure registries [] due to unauthorized: authentication required

Any idea why?