Display progress bar during image creatio

        # compute dname to set as a base directory

        dname = os.path.basename(data_path)

        try:

            dfo = PipeFile(tar_path, "w", progressbar=True)

            # Tarballing

            tarball = Tarball.open(tar_path, "w:gz", dereference=False)

            tarball = Tarball.open(fileobj=dfo, mode="w|gz", dereference=False)

            tarball.add(data_path, arcname="/", recursive=True,

                        filter=self._create_payload_tarball_filter)

            tarball.close()

            dfo.close()

        except Exception as e:

            raise Exception("Unable to create payload tarball %s: %s" % (tar_path, e))

        Create a payload file

        Only gzipping it

        '''

        fsource = PipeFile(source, "r")

        fsource = PipeFile(source, "r", progressbar=True)

        # open file not done in GzipFile, to escape writing of filename

        # in gzip file. This change md5.

        fdest = open(dest, "wb")

        fdest = gzip.GzipFile(filename=os.path.basename(source),

                              fileobj=fdest,

                              mtime=os.stat(source).st_mtime)

        shutil.copyfileobj(fsource, fdest)

        fsource.consume(fdest)

        fsource.close()

        fdest.close()