Create OpenStack Glance image for CoreOS

create_image.sh

#!/bin/bash

CURRENT_IMAGE_URL="http://alpha.release.core-os.net/amd64-usr/current/coreos_production_openstack_image.img.bz2"

rm coreos_production_openstack_image.{img,raw} coreos.{raw,qcow2} 2> /dev/null

curl -s http://alpha.release.core-os.net/amd64-usr/current/version.txt | grep COREOS_VERSION > ./current-version.sh
source ./current-version.sh
echo "Current CoreOS version is $COREOS_VERSION"

echo "Get current image signature"
curl -# -O -- ${CURRENT_IMAGE_URL}.sig

# Verify image integrity
gpg --verify coreos_production_openstack_image.img.bz2.sig
if [[ ! "$?" == 0 ]]; then
  echo "Get current image"
  curl -# -O -- $CURRENT_IMAGE_URL
  gpg --verify coreos_production_openstack_image.img.bz2.sig
  if [[ ! "$?" == 0 ]]; then
    echo "Image verification failed"
    exit 1
  fi
else
  echo "Already have current image"
fi

bunzip2 --keep coreos_production_openstack_image.img.bz2
mv coreos_production_openstack_image.img coreos.qcow2

glance image-create --name CoreOS-$COREOS_VERSION \
  --container-format bare \
  --disk-format qcow2 \
  --min-disk 5 \
  --file coreos.qcow2 \
  --is-public True