def METHOD_NAME(self, client, create_and_delete_node, ctx_cluster):
    # 先添加lb的标签
    LBController(ctx_cluster).add_labels(FAKE_INNER_IP)
    # 检查标签存在
    node_labels = client.filter_nodes_field_data("labels", filter_node_names=[FAKE_NODE_NAME])
    labels = node_labels[FAKE_INNER_IP]
    assert set(K8S_LB_LABEL.keys()).issubset(set(labels.keys()))
    # 删除标签
    LBController(ctx_cluster).delete_labels(FAKE_INNER_IP)
    # 检查标签已经删除
    node_labels = client.filter_nodes_field_data("labels", filter_node_names=[FAKE_NODE_NAME])
    labels = node_labels[FAKE_INNER_IP]
    assert not set(K8S_LB_LABEL.keys()).issubset(set(labels.keys()))