Return whether a metric is about a container or not.
        It can be about pods, or even higher levels in the cgroup hierarchy
        and we don't want to report on that.
        :param metric:
        :return: bool

def _is_container_metric(labels):
        """
        Return whether a metric is about a container or not.
        It can be about pods, or even higher levels in the cgroup hierarchy
        and we don't want to report on that.
        :param metric:
        :return: bool
        """
        for lbl in CONTAINER_LABELS:
            if lbl == 'container_name':
                if lbl in labels:
                    if labels[lbl] == '' or labels[lbl] == 'POD':
                        return False
            if lbl not in labels:
                return False
        return True