virtual machine image to tarball.

vmimg-to-tar.sh

#!/bin/bash

if [ $# -ne 3 ]
then
  echo "vmimg-to-tar.sh vm-image-path path-to-write tar-out-file"
  exit 1
fi

IMG=$1
PATH_TO_WRITE=$2
TAR=$3
IMG_FILE=$(basename "$IMG")
TAR_FILE=$(basename "$TAR")
IMG_DIR=$(cd "$(dirname "$IMG")" || exit; pwd)
TAR_DIR=$(cd "$(dirname "$TAR")" || exit; pwd)

docker run -it --rm \
  -v "$IMG_DIR":/root/in \
  -v "$TAR_DIR":/root/out \
  --entrypoint /usr/bin/virt-tar-out \
  curator/guestfish \
  -a "/root/in/$IMG_FILE" ${PATH_TO_WRITE} "/root/out/$TAR_FILE"