Micrometer Metrics

[janchristian-haddorp]

After adding Micrometer listener as decscribed on reference docs several Prometheus metrics are provided. But there are all quite low level. Is there a description (even in code) of the available metrics? Are there simple metrics like number of sent/received recordsavailable?

Project dependencies

Spring Boot 3.1.5
org.springframework.boot:spring-boot-starter-webflux
org.springframework.kafka:spring-kafka
io.projectreactor.kafka:reactor-kafka

Code examples

The examples linked on the docs seems being all not metrics/observability releated. Are there further code samples?

[janchristian-haddorp]

Following metrics found for producer...
kafka.producer.record.send.rate
kafka.producer.record.send.total

And consumer...
kafka_consumer_fetch_manager_records_consumed_rate
kafka_consumer_fetch_manager_records_consumed_total

So, main question seems being answered; but some more details/links on ref docs would be appreciated.

[garyrussell]

These metrics are maintained by the kafka-clients library; they are simply exposed here by adding the listeners; you need to ask the general Kafka community, either on Stack Overflow on one of their mailing lists.

[garyrussell]

You can find descriptions of the kafka-clients' metrics here: https://kafka.apache.org/documentation/#monitoring