Create default archive name.

        :return:

def _get_archive_name(self, archname=None):
        '''
        Create default archive name.

        :return:
        '''
        archname = re.sub('[^a-z0-9]', '', (archname or '').lower()) or 'support'
        for grain in ['fqdn', 'host', 'localhost', 'nodename']:
            host = __grains__.get(grain)
            if host:
                break
        if not host:
            host = 'localhost'

        return os.path.join(tempfile.gettempdir(),
                            '{hostname}-{archname}-{date}-{time}.bz2'.format(archname=archname,
                                                                             hostname=host,
                                                                             date=time.strftime('%Y%m%d'),
                                                                             time=time.strftime('%H%M%S')))