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kafka-riemann-reporter's Introduction

Kafka Riemann Reporter

Kafka includes support for automatically reporting various metrics (messages, bytes per topic etc.) in it's kafka.metrics.KafkaCSVMetricsReporter. This library provides an alternative which creates Riemann events.

Build Status

Using

Build the JAR and copy it to your Kafka install's ./libs directory.

$ mvn package
$ cp target/kafka-riemann-reporter-0.1-SNAPSHOT-jar-with-dependencies.jar $KAFKA_HOME/libs

Connecting directly to Riemann

You can publish metrics directly to a running Riemann service; ensure the following is in your server.properties:

kafka.metrics.polling.interval.secs=5
kafka.metrics.reporters=org.pingles.kafka.KafkaRiemannReporter
kafka.riemann.metrics.reporter.enabled=true
kafka.riemann.metrics.reporter.publisher=riemann
kafka.riemann.metrics.reporter.publisher.host=127.0.0.1
kafka.riemann.metrics.reporter.publisher.port=5555

Sending Riemann events via. Kafka

Alternatively, you can create Riemann event messages and push them to a Kafka topic. Set the following in your server.properties:

kafka.metrics.polling.interval.secs=5
kafka.metrics.reporters=org.pingles.kafka.KafkaRiemannReporter
kafka.riemann.metrics.reporter.enabled=true
kafka.riemann.metrics.reporter.publisher=kafka
kafka.riemann.metrics.reporter.publisher.topic=riemann_event

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kafka-riemann-reporter's Issues

Build Failure Maven

[ERROR] Failed to execute goal on project kafka-riemann-reporter: Could not resolve dependencies for project org.pingles:kafka-riemann-reporter:jar:0.1-SNAPSHOT: Failed to collect dependencies for [com.uswitch:kafka_2.9.2:jar:0.8.0-SNAPSHOT (provided), com.aphyr:riemann-java-client:jar:0.2.2 (compile), com.yammer.metrics:metrics-core:jar:2.2.0 (provided), junit:junit:jar:4.11 (test), log4j:log4j:jar:1.2.15 (compile)]: Failed to read artifact descriptor for com.uswitch:kafka_2.9.2:jar:0.8.0-SNAPSHOT: Could not transfer artifact com.uswitch:kafka_2.9.2:pom:0.8.0-SNAPSHOT from/to apache-maven (http://repo.maven.apache.org/maven2): proxy: Unknown host proxy -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

Upgrade dependencies and release

Please consider upgrading dependencies like Kafka 0.8.2.1 and riemann-java-client 0.3.1, and then make a release to a public maven repository. Maybe release first 0.1 version with current dependencies.

Riemann is required to be running for Kafka to start

I've configured Kafka to use kafka-riemann-reporter to report metrics to Riemann. If I start Kafka without Riemann being available then I get this error and Kafka won't start (the process is running but it's not available for requests).

[2014-07-03 03:59:20,250] FATAL  (kafka.Kafka$)
java.lang.RuntimeException: java.io.IOException: Connection failed
    at org.pingles.kafka.KafkaRiemannReporter.initialize(KafkaRiemannReporter.java:38)
    at org.pingles.kafka.KafkaRiemannReporter.init(KafkaRiemannReporter.java:25)
    at kafka.metrics.KafkaMetricsReporter$$anonfun$startReporters$1.apply(KafkaMetricsReporter.scala:60)
    at kafka.metrics.KafkaMetricsReporter$$anonfun$startReporters$1.apply(KafkaMetricsReporter.scala:58)
    at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
    at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
    at kafka.metrics.KafkaMetricsReporter$.startReporters(KafkaMetricsReporter.scala:58)
    at kafka.Kafka$.main(Kafka.scala:36)
    at kafka.Kafka.main(Kafka.scala)
Caused by: java.io.IOException: Connection failed
    at com.aphyr.riemann.client.TcpTransport.connect(TcpTransport.java:143)
...

It seems undesirable to have Kafka depending so heavily on a single instance of Riemann being available. Is it possible to have Kafka start without depending on Riemann being available?

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