A prometheus exporter for Kafka's consumer group information. For other metrics from Kafka, have a look at the JMX exporter.

• Exports Kafka's consumer group information which can be obtained by executing kafka-consumer-groups.sh
• Supports only new consumer (--new-consumer switch enabled by default) which uses Kafka broker as the offset checkpoint store

• kafka_broker_consumer_group_current_offset: Consuming offset of each consumer group/client/topic/partition based on committed offset
• kafka_broker_consumer_group_offset_lag: Offset lag between the last log end offset and consuming point of each consumer group/client/topic/partition

This exporter relies on kafka-consumer-groups.sh script that is shipped as part of Apache Kafka distribution. Here is the list of Apache Kafka versions which has been tested to use from this exporter:

• 0.10.2.1
• 0.10.1.X
• 0.10.0.1
• 0.9.0.1

$ go get github.com/kawamuray/prometheus-kafka-consumer-group-exporter/...
$ $GOPATH/bin/prometheus-kafka-consumer-group-exporter -help

$ go get github.com/kawamuray/prometheus-kafka-consumer-group-exporter
$ cd $GOPATH/src/github.com/kawamuray/prometheus-kafka-consumer-group-exporter
$ git checkout -b my-new-feature
$ go test -v ./...    # Run tests to make sure you have a good development environment and all works.

Before pull requests you may also want to make sure that go vet, gofmt and golint passes:

$ go get -u github.com/golang/lint/golint
$ golint ./...
$ ./check_gofmt.sh
$ go vet ./...

(otherwise that's done through our CI on pull request submission)

# Download latest Kafka distribution (if necessary)
$ tar zxvf kafka_LATEST_VERSION.tgz
$ ./kafka_consumer_group_exporter --consumer-group-command-path=./kafka_LATEST_VERSION/bin/kafka-consumer-groups.sh BOOTSTRAP_SERVERS