Kafka Graphite Metrics Reporter

This is a simple reporter for kafka using the GraphiteReporter. It works with kafka 0.8.x and 0.9.x versions.

Big thanks to Maxime Brugidou from Criteo who did the initial commit of the Ganglia version, available here https://github.com/criteo/kafka-ganglia

Install On Broker

Build the kafka-graphite-1.0.*.jar jar using mvn package or download it from the releases. Hint: The jar will include the metrics-graphite dependency which is not brought by Kafka.
Add kafka-graphite-1.0.*.jar to the libs/ directory of your kafka broker installation
Configure the broker (see the configuration section below)
Restart the broker

Configuration

Edit the server.properties file of your installation, activate the reporter by setting:

kafka.metrics.reporters=com.criteo.kafka.KafkaGraphiteMetricsReporter
kafka.graphite.metrics.reporter.enabled=true

You may also specify multiple comma-separated reporter classes for the kafka.metrics.reporters property:

kafka.metrics.reporters=com.criteo.kafka.KafkaGraphiteMetricsReporter,kafka.metrics.KafkaCSVMetricsReporter[,....]

Here is a list of default properties used:

kafka.graphite.metrics.host=localhost
kafka.graphite.metrics.port=2003
# The group value is going to be part of the metrics name to distinguish between different brokers
kafka.graphite.metrics.group=kafka
# This can be use to exclude some metrics from graphite 
# since kafka has quite a lot of metrics, it is useful
# if you have many topics/partitions. For example :
kafka.graphite.metrics.exclude.regex=(kafka.network.*|kafka.*.topic.*)

# Each metric provides multiple dimensions: min, max, meanRate, etc
# This might be too much data.
# It is possible to disable some metric dimensions with the following properties:
# By default all dimensions are enabled. Only the unwanted dimensions have to be configured
kafka.graphite.dimension.enabled.count=false
kafka.graphite.dimension.enabled.meanRate=false
kafka.graphite.dimension.enabled.rate1m=false
kafka.graphite.dimension.enabled.rate5m=false
kafka.graphite.dimension.enabled.rate15m=false
kafka.graphite.dimension.enabled.min=false
kafka.graphite.dimension.enabled.max=false
kafka.graphite.dimension.enabled.mean=false
kafka.graphite.dimension.enabled.sum=false
kafka.graphite.dimension.enabled.stddev=false
kafka.graphite.dimension.enabled.median=false
kafka.graphite.dimension.enabled.p75=false
kafka.graphite.dimension.enabled.p95=false
kafka.graphite.dimension.enabled.p98=false
kafka.graphite.dimension.enabled.p99=false
kafka.graphite.dimension.enabled.p999=false

Known Issues

With Kafka <= 0.8.2.2 there is an issue if topics get deleted or partions are moved between brokers. The metrics are not get deleted in this case and because they are implemented as a Gauge, a NoSuchElementException is thrown when the metrics are reported.

There is already a fix for this, see KAFKA-1866 but it did not make it into an 0.8.x release. Because of this we implemented a workaround for this within the FilterMetricsPredicate.