Hi Kafka users, I am trying to expose Kafka client metrics to Prometheus via *MetricsReporter*. And it looks like Kafka clients don't expose the *Measurable* objects so that I can only do *KafkaMetric.value()* and use it as Gauge in Prometheus even if the metric could be a Percentile in Kafka clients. This would be a problem if these gauge metrics need to be aggregated in prometheus. So ideally, I hope we can provide customized *Measurable* objects for Kafka clients to use, and those Measurable objects will maintain a set of corresponding Prometheus metric objects. For example, for a customized Counter object, whenever it updates the value, it also updates the value of a corresponding Prometheus object. In this way, we will have a full copy of sample data from Kafka metrics in Prometheus metric object.
I would like to know if anyone has this issue and how this should be handled. Thanks! -- Yifan
