Create image from unikernel

xen2img.sh

#!/usr/bin/env bash
# Create an image from a unikernel. 
# Props to Mirage for this script, which was derived from
# https://raw.githubusercontent.com/mirage/mirage/master/scripts/ec2.sh

while getopts "hn:k:" arg; do
 case $arg in
 h)
   echo "usage: $0 [-h] [-n <name>] [-r <region>] -k <unikernel> " 
   echo ""
   echo "<unikernel>: Name of the kernel file (e.g. mir-www.xen)"
   echo "<name>: the application name to use"

   exit 1 ;;
 n) NAME=$OPTARG ;;
 k) APP=$OPTARG ;;
 esac
done

if [ ! -e "$APP" ]; then
  echo "Must specify a unikernel file with -k."
  exit 1
fi

# Make name unique to avoid registration clashes
[ ! "$NAME" ] && NAME=$(basename $APP .xen)
NAME=${NAME} -`date +%s`
MNT=/tmp/mirage-ec2
SUDO=sudo
IMG=${NAME}.img

echo Name  : ${NAME}

set -e

${SUDO} mkdir -p ${MNT}
rm -f ${IMG}
dd if=/dev/zero of=${IMG} bs=1M count=5
${SUDO} mke2fs -F -j ${IMG}
${SUDO} mount -o loop ${IMG} ${MNT}

${SUDO} mkdir -p ${MNT}/boot/grub
echo default 0 > menu.lst
echo timeout 1 >> menu.lst
echo title Mirage >> menu.lst
echo " root (hd0)" >> menu.lst
echo " kernel /boot/mirage-os.gz" >> menu.lst
${SUDO} mv menu.lst ${MNT}/boot/grub/menu.lst
${SUDO} sh -c "gzip -c $APP > ${MNT}/boot/mirage-os.gz"
${SUDO} umount -d ${MNT}