├── .gitignore ├── LICENSE ├── README.md ├── project ├── Build.scala ├── build.properties └── plugins.sbt └── src ├── main └── scala │ └── pl │ └── allegro │ └── tech │ └── kafka │ └── offset │ └── monitor │ └── graphite │ ├── GaugesValues.scala │ ├── GraphiteReporterArguments.scala │ └── OffsetGraphiteReporter.scala └── test └── scala └── pl └── allegro └── tech └── kafka └── offset └── monitor └── graphite ├── GraphiteMockServer.scala └── OffsetGraphiteReporterTest.scala /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | *.log 3 | 4 | # sbt specific 5 | .cache 6 | .history 7 | .lib/ 8 | dist/* 9 | target/ 10 | lib_managed/ 11 | src_managed/ 12 | project/boot/ 13 | project/plugins/project/ 14 | 15 | # Scala-IDE specific 16 | .scala_dependencies 17 | .worksheet 18 | .idea 19 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | kafka-offset-monitor-graphite 2 | =========== 3 | Plugin to [KafkaOffsetMonitor](https://github.com/quantifind/KafkaOffsetMonitor) tool reporting offset data to graphite via [dropwizard metrics](https://github.com/dropwizard/metrics). 4 | 5 | 6 | Building It 7 | =========== 8 | Currently KafkaOffsetMonitor is not available via public artifact repository, so before we build the plugin we need to build KafkaOffsetMonitor and publish it to maven local repo: 9 | 10 | ``` 11 | sbt publishM2 12 | ``` 13 | 14 | Now we can build the plugin: 15 | 16 | ``` 17 | sbt assembly 18 | ``` 19 | 20 | Running It 21 | =========== 22 | Check how to run KafkaOffsetMonitor and modify the command by adding a plugin assembly jar file to the classpath, and put graphite configuration properties into a pluginsArgs argument. 23 | 24 | See original KafkaOffsetMonitor example command modified with graphite reporter plugin usage: 25 | 26 | ``` 27 | java -cp "KafkaOffsetMonitor-assembly-0.3.0-SNAPSHOT.jar:kafka-offset-monitor-graphite-assembly-0.1.0-SNAPSHOT.jar" \ 28 | com.quantifind.kafka.offsetapp.OffsetGetterWeb \ 29 | --zk zk-server1,zk-server2 \ 30 | --port 8080 \ 31 | --refresh 10.seconds \ 32 | --retain 2.days \ 33 | --pluginsArgs graphiteHost=graphite.host,graphitePort=2003,graphitePrefix=stats.kafka.offset_monitor 34 | ``` 35 | 36 | The pluginArgs used by kafka-offset-monitor-graphite are: 37 | 38 | - **graphiteHost** Graphite host (default localhost) 39 | - **graphitePort** Graphite reporting port (default 2003) 40 | - **graphitePrefix** Metrics prefix (default stats.kafka.offset.monitor) 41 | - **graphiteReportPeriod** Reporting period in seconds (default 30) 42 | - **metricsCacheExpireSeconds** Metrics cache TTL in mires (default 600). Offset metrics are stored in expiring cache and reported to Graphite periodically. If metrics are not updated they will be removed. 43 | -------------------------------------------------------------------------------- /project/Build.scala: -------------------------------------------------------------------------------- 1 | import sbt._ 2 | import Keys._ 3 | import sbtassembly.Plugin._ 4 | import AssemblyKeys._ 5 | 6 | object KafkaUtilsBuild extends Build { 7 | 8 | lazy val graphiteReporter = Project("graphiteReporter", file("."), settings = graphiteReporterSettings) 9 | 10 | def graphiteReporterSettings = assemblySettings ++ Seq( 11 | 12 | version := "0.1.0-SNAPSHOT", 13 | scalaVersion := "2.10.5", 14 | name := "kafka-offset-monitor-graphite", 15 | 16 | mergeStrategy in assembly := { 17 | case "about.html" => MergeStrategy.discard 18 | case x => 19 | val oldStrategy = (mergeStrategy in assembly).value 20 | oldStrategy(x) 21 | }, 22 | 23 | libraryDependencies ++= Seq( 24 | "com.google.guava" % "guava" % "18.0", 25 | "com.quantifind" % "kafkaoffsetmonitor_2.10" % "0.3.0-SNAPSHOT", 26 | "io.dropwizard.metrics" % "metrics-graphite" % "3.1.2", 27 | 28 | "org.scalatest" % "scalatest_2.10" % "2.2.4" % "test", 29 | "com.jayway.awaitility" % "awaitility" % "1.6.1" % "test" 30 | ), 31 | 32 | excludedJars in assembly := { 33 | val cp = (fullClasspath in assembly).value 34 | cp filter {_.data.getName == "KafkaOffsetMonitor-assembly-0.3.0-SNAPSHOT.jar"} 35 | }, 36 | 37 | resolvers ++= Seq( 38 | "Local Maven Repository" at "file://"+Path.userHome.absolutePath+"/.m2/repository", 39 | "java m2" at "http://download.java.net/maven/2", 40 | "twitter repo" at "http://maven.twttr.com" 41 | ) 42 | ) 43 | } 44 | -------------------------------------------------------------------------------- /project/build.properties: -------------------------------------------------------------------------------- 1 | 2 | sbt.version=0.13.8 3 | -------------------------------------------------------------------------------- /project/plugins.sbt: -------------------------------------------------------------------------------- 1 | addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.9.0") 2 | -------------------------------------------------------------------------------- /src/main/scala/pl/allegro/tech/kafka/offset/monitor/graphite/GaugesValues.scala: -------------------------------------------------------------------------------- 1 | package pl.allegro.tech.kafka.offset.monitor.graphite 2 | 3 | class GaugesValues { 4 | var logSize: Long = 0L 5 | var offset : Long = 0L 6 | var lag : Long = 0L 7 | } 8 | -------------------------------------------------------------------------------- /src/main/scala/pl/allegro/tech/kafka/offset/monitor/graphite/GraphiteReporterArguments.scala: -------------------------------------------------------------------------------- 1 | package pl.allegro.tech.kafka.offset.monitor.graphite 2 | 3 | import java.lang.Integer.parseInt 4 | 5 | object GraphiteReporterArguments { 6 | 7 | var graphiteHost : String = "localhost" 8 | 9 | var graphitePort : Int = 2003 10 | 11 | var graphitePrefix : String = "stats.kafka.offset.monitor" 12 | 13 | var graphiteReportPeriod : Int = 30 14 | 15 | var metricsCacheExpireSeconds : Int = 600 16 | 17 | def parseArguments(args: String) = { 18 | val argsMap: Map[String, String] = args.split(",").map(_.split("=", 2)).filter(_.length > 1).map(arg => { arg(0) -> arg(1) }).toMap 19 | argsMap.get("graphiteHost").foreach(graphiteHost = _) 20 | argsMap.get("graphitePort").foreach(str => {graphitePort = parseInt(str)}) 21 | argsMap.get("graphitePrefix").foreach(graphitePrefix = _) 22 | argsMap.get("graphiteReportPeriod").foreach(str => {graphiteReportPeriod = parseInt(str)}) 23 | argsMap.get("metricsCacheExpireSeconds").foreach(str => {metricsCacheExpireSeconds = parseInt(str)}) 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /src/main/scala/pl/allegro/tech/kafka/offset/monitor/graphite/OffsetGraphiteReporter.scala: -------------------------------------------------------------------------------- 1 | package pl.allegro.tech.kafka.offset.monitor.graphite 2 | 3 | import java.net.InetSocketAddress 4 | import java.util.concurrent.TimeUnit 5 | 6 | import com.codahale.metrics.{MetricRegistry, MetricFilter} 7 | import com.codahale.metrics.graphite.{GraphiteReporter, Graphite} 8 | import com.google.common.cache._ 9 | import com.quantifind.kafka.OffsetGetter.OffsetInfo 10 | import com.codahale.metrics.Gauge 11 | 12 | class OffsetGraphiteReporter (pluginsArgs: String) extends com.quantifind.kafka.offsetapp.OffsetInfoReporter { 13 | 14 | GraphiteReporterArguments.parseArguments(pluginsArgs) 15 | 16 | val metrics : MetricRegistry = new MetricRegistry() 17 | 18 | val graphite : Graphite = new Graphite(new InetSocketAddress(GraphiteReporterArguments.graphiteHost, GraphiteReporterArguments.graphitePort)) 19 | val reporter : GraphiteReporter = GraphiteReporter.forRegistry(metrics) 20 | .prefixedWith(GraphiteReporterArguments.graphitePrefix) 21 | .convertRatesTo(TimeUnit.SECONDS) 22 | .convertDurationsTo(TimeUnit.MILLISECONDS) 23 | .filter(MetricFilter.ALL) 24 | .build(graphite) 25 | 26 | reporter.start(GraphiteReporterArguments.graphiteReportPeriod, TimeUnit.SECONDS) 27 | 28 | val removalListener : RemovalListener[String, GaugesValues] = new RemovalListener[String, GaugesValues] { 29 | override def onRemoval(removalNotification: RemovalNotification[String, GaugesValues]) = { 30 | metrics.remove(removalNotification.getKey() + ".offset") 31 | metrics.remove(removalNotification.getKey() + ".logSize") 32 | metrics.remove(removalNotification.getKey() + ".lag") 33 | } 34 | } 35 | 36 | val gauges : LoadingCache[String, GaugesValues] = CacheBuilder.newBuilder() 37 | .expireAfterAccess(GraphiteReporterArguments.metricsCacheExpireSeconds, TimeUnit.SECONDS) 38 | .removalListener(removalListener) 39 | .build( 40 | new CacheLoader[String, GaugesValues]() { 41 | def load(key: String): GaugesValues = { 42 | val values: GaugesValues = new GaugesValues() 43 | 44 | val offsetGauge: Gauge[Long] = new Gauge[Long] { 45 | override def getValue: Long = { 46 | values.offset 47 | } 48 | } 49 | 50 | val lagGauge: Gauge[Long] = new Gauge[Long] { 51 | override def getValue: Long = { 52 | values.lag 53 | } 54 | } 55 | 56 | val logSizeGauge: Gauge[Long] = new Gauge[Long] { 57 | override def getValue: Long = { 58 | values.logSize 59 | } 60 | } 61 | 62 | metrics.register(key + ".offset", offsetGauge) 63 | metrics.register(key + ".logSize", logSizeGauge) 64 | metrics.register(key + ".lag", lagGauge) 65 | 66 | values 67 | } 68 | } 69 | ) 70 | 71 | override def report(info: scala.IndexedSeq[OffsetInfo]) = { 72 | info.foreach(i => { 73 | val values: GaugesValues = gauges.get(getMetricName(i)) 74 | values.logSize = i.logSize 75 | values.offset = i.offset 76 | values.lag = i.lag 77 | }) 78 | } 79 | 80 | def getMetricName(offsetInfo: OffsetInfo): String = { 81 | offsetInfo.topic.replace(".", "_") + "." + offsetInfo.group.replace(".", "_") + "." + offsetInfo.partition 82 | } 83 | } 84 | -------------------------------------------------------------------------------- /src/test/scala/pl/allegro/tech/kafka/offset/monitor/graphite/GraphiteMockServer.scala: -------------------------------------------------------------------------------- 1 | package pl.allegro.tech.kafka.offset.monitor.graphite 2 | 3 | import java.io.InputStream 4 | import java.lang 5 | import java.net.ServerSocket 6 | import java.util.concurrent.{Callable, ExecutorService, Executors} 7 | 8 | import com.jayway.awaitility.Awaitility._ 9 | import com.jayway.awaitility.Duration 10 | 11 | class GraphiteMockServer(port: Int) { 12 | 13 | var serverSocket: ServerSocket = null 14 | val executor: ExecutorService = Executors.newFixedThreadPool(10) 15 | @volatile var listen: Boolean = false 16 | 17 | var expectedMetrics: scala.collection.mutable.Map[String, Double] = scala.collection.mutable.Map() 18 | var receivedMetrics: scala.collection.mutable.Map[String, Double] = scala.collection.mutable.Map() 19 | 20 | def start() { 21 | serverSocket = new ServerSocket(port) 22 | listen = true 23 | handleConnections() 24 | } 25 | 26 | private def handleConnections() { 27 | executor.execute(new Runnable { 28 | override def run() { 29 | while(listen) { 30 | readData(serverSocket.accept().getInputStream()) 31 | } 32 | } 33 | }) 34 | } 35 | 36 | private def readData(stream: InputStream) { 37 | executor.execute(new Runnable { 38 | override def run() { 39 | scala.io.Source.fromInputStream(stream).getLines().foreach((line) => handleMetric(line)) 40 | } 41 | }) 42 | } 43 | 44 | private def handleMetric(metricLine: String) { 45 | val metric = metricLine.split(" ")(0) 46 | val value = metricLine.split(" ")(1) 47 | 48 | if(expectedMetrics.contains(metric)) { 49 | receivedMetrics += (metric -> value.toDouble) 50 | } 51 | } 52 | 53 | def stop() { 54 | listen = false 55 | serverSocket.close() 56 | } 57 | 58 | def reset() { 59 | expectedMetrics.clear() 60 | receivedMetrics.clear() 61 | } 62 | 63 | def expectMetric(metricNamePattern: String, value: Double) { 64 | expectedMetrics += (metricNamePattern -> value) 65 | } 66 | 67 | def waitUntilReceived() { 68 | await.atMost(Duration.FIVE_SECONDS).until(new Callable[lang.Boolean] { 69 | override def call(): lang.Boolean = { 70 | expectedMetrics.forall { case (k, v) => 71 | receivedMetrics.get(k).exists( (rv) => v == rv ) 72 | } 73 | } 74 | }) 75 | } 76 | } 77 | -------------------------------------------------------------------------------- /src/test/scala/pl/allegro/tech/kafka/offset/monitor/graphite/OffsetGraphiteReporterTest.scala: -------------------------------------------------------------------------------- 1 | package pl.allegro.tech.kafka.offset.monitor.graphite 2 | 3 | import com.quantifind.kafka.OffsetGetter.OffsetInfo 4 | import org.scalatest.{BeforeAndAfter, FlatSpec, GivenWhenThen} 5 | 6 | class OffsetGraphiteReporterTest extends FlatSpec with BeforeAndAfter with GivenWhenThen { 7 | 8 | val GRAPHITE_PORT = 48213 9 | 10 | val graphite = new GraphiteMockServer(GRAPHITE_PORT) 11 | 12 | val reporter = new OffsetGraphiteReporter(s"graphiteHost=localhost,graphitePort=$GRAPHITE_PORT,graphitePrefix=offset,metricsCacheExpireSeconds=1,graphiteReportPeriod=1") 13 | 14 | before { 15 | graphite.start() 16 | } 17 | 18 | after { 19 | graphite.stop() 20 | } 21 | 22 | it should "report metrics to graphite" in { 23 | Given("offset") 24 | val offset = OffsetInfo("group", "topic", 0, 10, 11, Option.empty, null, null) 25 | graphite.expectMetric("offset.topic.group.0.offset", 10) 26 | graphite.expectMetric("offset.topic.group.0.logSize", 11) 27 | graphite.expectMetric("offset.topic.group.0.lag", 1) 28 | 29 | When("reporting") 30 | reporter.report(Array(offset)) 31 | 32 | Then("expect metrics to be delivered") 33 | graphite.waitUntilReceived() 34 | } 35 | 36 | it should "escape names of topic and groups" in { 37 | Given("offset for topic and group with dots") 38 | val offset = OffsetInfo("escape.group", "escape.topic", 0, 10, 11, Option.empty, null, null) 39 | 40 | When("reporting") 41 | graphite.expectMetric("offset.escape_topic.escape_group.0.offset", 10) 42 | graphite.expectMetric("offset.escape_topic.escape_group.0.logSize", 11) 43 | graphite.expectMetric("offset.escape_topic.escape_group.0.lag", 1) 44 | reporter.report(Array(offset)) 45 | 46 | Then("expect metrics to be delivered") 47 | graphite.waitUntilReceived() 48 | } 49 | 50 | it should "not fail to recreate metrics after cache has expired" in { 51 | Given("offset") 52 | val offset = OffsetInfo("expired_group", "expired_topic", 0, 10, 11, Option.empty, null, null) 53 | reporter.report(Array(offset)) 54 | 55 | When("waiting for cache to expire and reporting again") 56 | Thread.sleep(2000) 57 | graphite.expectMetric("offset.expired_topic.expired_group.0.offset", 10) 58 | reporter.report(Array(offset)) 59 | 60 | Then("expect metrics to be delivered") 61 | graphite.waitUntilReceived() 62 | } 63 | } 64 | --------------------------------------------------------------------------------