Should only be called on a container-scoped metric
        It gets the container id from the podlist using the metrics labels

        :param labels
        :return str or None

def _get_container_id(self, labels):
        """
        Should only be called on a container-scoped metric
        It gets the container id from the podlist using the metrics labels

        :param labels
        :return str or None
        """
        namespace = CadvisorPrometheusScraperMixin._get_container_label(labels, "namespace")
        pod_name = CadvisorPrometheusScraperMixin._get_container_label(labels, "pod_name")
        container_name = CadvisorPrometheusScraperMixin._get_container_label(labels, "container_name")
        return self.pod_list_utils.get_cid_by_name_tuple((namespace, pod_name, container_name))