Kafka-exporter监控消费速度与生产速度差异规则max by(topic, consumergroup) (sum by(topic, partition, consumergroup) (increase(kafka_consumergroup_current_offset{}[2m])) / on(topic, partition) group_left() sum by(topic, partition) (increase(kafka_topic_partition_current_offset[2m])) <= 0.8 and sum by(