'Make the RPC call to import a volume backup.
:param context: running context
:param backup_service: backup service name
:param backup_url: backup description to be used by the backup driver
:raises InvalidBackup:
:raises ServiceNotFound:
:raises InvalidInput:'

def import_record(self, context, backup_service, backup_url):

    check_policy(context, 'backup-import')
    hosts = self._list_backup_hosts()
    if (len(hosts) == 0):
        raise exception.ServiceNotFound(service_id=backup_service)
    backup = self._get_import_backup(context, backup_url)
    first_host = hosts.pop()
    self.backup_rpcapi.import_record(context, first_host, backup, backup_service, backup_url, hosts)
    return backup
