├── .gitignore ├── LICENSE ├── activator.properties ├── build.sbt ├── project ├── build.properties └── plugins.sbt ├── sigar ├── libsigar-amd64-freebsd-6.so ├── libsigar-amd64-linux.so ├── libsigar-amd64-solaris.so ├── libsigar-ia64-hpux-11.sl ├── libsigar-ia64-linux.so ├── libsigar-pa-hpux-11.sl ├── libsigar-ppc-aix-5.so ├── libsigar-ppc-linux.so ├── libsigar-ppc64-aix-5.so ├── libsigar-ppc64-linux.so ├── libsigar-s390x-linux.so ├── libsigar-sparc-solaris.so ├── libsigar-sparc64-solaris.so ├── libsigar-universal-macosx.dylib ├── libsigar-universal64-macosx.dylib ├── libsigar-x86-freebsd-5.so ├── libsigar-x86-freebsd-6.so ├── libsigar-x86-linux.so ├── libsigar-x86-solaris.so ├── sigar-amd64-winnt.dll ├── sigar-x86-winnt.dll └── sigar-x86-winnt.lib ├── src ├── main │ ├── resources │ │ └── application.conf │ └── scala │ │ └── com │ │ └── boldradius │ │ ├── sample │ │ └── cluster │ │ │ ├── SampleClusterApp.scala │ │ │ ├── SampleClusterBackend.scala │ │ │ ├── SampleClusterDefs.scala │ │ │ ├── SampleClusterFrontend.scala │ │ │ └── SampleClusterHttpRoute.scala │ │ └── util │ │ └── Json4sSupport.scala └── test │ └── scala │ └── com │ └── boldradius │ └── sample │ └── cluster │ ├── FrontendSpec.scala │ └── HttpRouteSpec.scala └── tutorial └── index.html /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | *.log 3 | *.classpath 4 | *.cache 5 | *.project 6 | *.settings 7 | # sbt specific 8 | .cache/ 9 | .history/ 10 | .lib/ 11 | .idea/ 12 | dist/* 13 | target/ 14 | lib_managed/ 15 | src_managed/ 16 | project/boot/ 17 | project/plugins/project/ 18 | 19 | # Scala-IDE specific 20 | .scala_dependencies 21 | .worksheet 22 | *.sc 23 | -------------------------------------------------------------------------------- /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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-------------------------------------------------------------------------------- 1 | name=akka-http-adaptive-cluster-aws 2 | title=Akka cluster with adaptive group strategy 3 | description=A seed microservice with Akka 'adaptive group' cluster and instructions for AWS configuration. 4 | tags=akka-http,akka,cluster,microservice,starter,seed,scala,cake,pattern 5 | authorTwitter=boldradius 6 | -------------------------------------------------------------------------------- /build.sbt: -------------------------------------------------------------------------------- 1 | import com.github.retronym.SbtOneJar 2 | 3 | val akkaVersion = "2.3.8" 4 | val akkaHttp = "1.0-M2" 5 | 6 | val project = Project( 7 | id = "akka-adaptive-cluster-aws", 8 | base = file("."), 9 | settings = Project.defaultSettings ++ SbtOneJar.oneJarSettings ++ Seq( 10 | name := "akka-adaptive-cluster-aws", 11 | version := "2.3.8", 12 | scalaVersion := "2.11.4", 13 | scalacOptions in Compile ++= Seq("-encoding", "UTF-8", "-target:jvm-1.6", "-deprecation", "-feature", "-unchecked", "-Xlog-reflective-calls", "-Xlint"), 14 | javacOptions in Compile ++= Seq("-source", "1.6", "-target", "1.6", "-Xlint:unchecked", "-Xlint:deprecation"), 15 | libraryDependencies ++= Seq( 16 | "com.typesafe.akka" %% "akka-cluster" % akkaVersion, 17 | "com.typesafe.akka" % "akka-http-experimental_2.11" % akkaHttp, 18 | "org.json4s" %% "json4s-native" % "3.2.11", 19 | "org.fusesource" % "sigar" % "1.6.4", 20 | "junit" % "junit" % "4.8.1" % "test", 21 | "org.scalatest" %% "scalatest" % "2.2.1" % "test", 22 | "com.typesafe.akka" % "akka-http-testkit-experimental_2.11" % akkaHttp % "test", 23 | "com.typesafe.akka" %% "akka-testkit" % akkaVersion % "test"), 24 | javaOptions in run ++= Seq( 25 | "-Djava.library.path=./sigar", 26 | "-Xms128m", "-Xmx1024m"), 27 | javaOptions in test ++= Seq( 28 | "-Djava.library.path=./sigar"), 29 | Keys.fork in run := true, 30 | // disable parallel tests 31 | parallelExecution in Test := false 32 | ) 33 | ) 34 | -------------------------------------------------------------------------------- /project/build.properties: -------------------------------------------------------------------------------- 1 | #Activator-generated Properties 2 | #Wed Dec 17 14:53:53 UTC 2014 3 | template.uuid=7193124a-3994-4b10-8b01-a17f75ed2ea4 4 | sbt.version=0.13.1 5 | -------------------------------------------------------------------------------- /project/plugins.sbt: -------------------------------------------------------------------------------- 1 | 2 | resolvers += Classpaths.typesafeResolver 3 | 4 | addSbtPlugin("org.scala-sbt.plugins" % "sbt-onejar" % "0.8") 5 | -------------------------------------------------------------------------------- /sigar/libsigar-amd64-freebsd-6.so: -------------------------------------------------------------------------------- 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"akka.tcp://ClusterSystem@127.0.0.1:2551", 17 | "akka.tcp://ClusterSystem@127.0.0.1:2552"] 18 | 19 | auto-down-unreachable-after = 10s 20 | } 21 | } 22 | 23 | # //#min-nr-of-members 24 | akka.cluster.min-nr-of-members = 3 25 | # //#min-nr-of-members 26 | 27 | # //#role-min-nr-of-members 28 | akka.cluster.role { 29 | frontend.min-nr-of-members = 1 30 | backend.min-nr-of-members = 2 31 | } 32 | # //#role-min-nr-of-members 33 | 34 | # //#adaptive-router 35 | akka.actor.deployment { 36 | /sampleClusterFrontend/sampleClusterBackendRouter = { 37 | router = adaptive-group 38 | # metrics-selector = heap 39 | # metrics-selector = load 40 | # metrics-selector = cpu 41 | metrics-selector = mix 42 | nr-of-instances = 100 43 | routees.paths = ["/user/sampleClusterBackend"] 44 | cluster { 45 | enabled = on 46 | use-role = backend 47 | allow-local-routees = off 48 | } 49 | } 50 | } 51 | # //#adaptive-router 52 | -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterApp.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import com.typesafe.config.ConfigFactory 4 | 5 | object SampleClusterApp { 6 | def main(args: Array[String]): Unit = { 7 | 8 | // starting 3 backend nodes and 1 frontend node 9 | SampleClusterBackend.main(Seq("2551").toArray) 10 | SampleClusterBackend.main(Seq("2552").toArray) 11 | SampleClusterBackend.main(Array.empty) 12 | SampleClusterFrontend.main(Array.empty) 13 | } 14 | 15 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterBackend.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.concurrent.Future 4 | import com.typesafe.config.ConfigFactory 5 | import akka.actor.Actor 6 | import akka.actor.ActorLogging 7 | import akka.actor.ActorSystem 8 | import akka.actor.Props 9 | import scala.util.Success 10 | import scala.util.Failure 11 | import akka.pattern.pipe 12 | import akka.cluster.Cluster 13 | import akka.cluster.ClusterEvent.ClusterMetricsChanged 14 | import akka.cluster.ClusterEvent.CurrentClusterState 15 | import akka.cluster.NodeMetrics 16 | import SampleClusterDefs._ 17 | 18 | class SampleClusterBackend extends Actor with ActorLogging { 19 | 20 | val selfAddress = Cluster(context.system).selfAddress 21 | 22 | override def preStart(): Unit = 23 | Cluster(context.system).subscribe(self, classOf[ClusterMetricsChanged]) 24 | override def postStop(): Unit = 25 | Cluster(context.system).unsubscribe(self) 26 | 27 | 28 | def receiveWithMetricsAvailable(nodeMetrics: NodeMetrics): Receive = { 29 | case c: GetActorMetrics => 30 | sender() ! Metrics(address = nodeMetrics.address.toString, timestamp = nodeMetrics.timestamp, cpu = nodeMetrics.metric("cpu-combined").map(_.value.doubleValue()).getOrElse(-1.0)) 31 | case ClusterMetricsChanged(clusterMetrics) => 32 | clusterMetrics.filter(_.address == selfAddress) foreach { newNodeMetrics => 33 | context.become(receiveWithMetricsAvailable(newNodeMetrics)) 34 | } 35 | case state: CurrentClusterState => // ignore 36 | } 37 | 38 | def receive = { 39 | case c: GetActorMetrics => // didn't get first metrics 40 | sender() ! NoMetricsPresent 41 | case ClusterMetricsChanged(clusterMetrics) => 42 | clusterMetrics.filter(_.address == selfAddress) foreach { newNodeMetrics => 43 | context.become(receiveWithMetricsAvailable(newNodeMetrics)) 44 | } 45 | case state: CurrentClusterState => // ignore 46 | } 47 | } 48 | 49 | object SampleClusterBackend { 50 | def main(args: Array[String]): Unit = { 51 | val port = if (args.isEmpty) "0" else args(0) 52 | val config = ConfigFactory.parseString(s"akka.remote.netty.tcp.port=$port"). 53 | withFallback(ConfigFactory.parseString(s"akka.cluster.roles = [$BackendActorRoleName]")) 54 | .withFallback(ConfigFactory.load("application")) 55 | 56 | val system = ActorSystem(ActorSystemName, config) 57 | system.actorOf(Props(classOf[SampleClusterBackend]), name = BackendActorName) 58 | } 59 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterDefs.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.language.implicitConversions 4 | 5 | object SampleClusterDefs { 6 | 7 | case class GetActorMetrics() 8 | 9 | trait MetricsT 10 | case class NoMetricsPresent() extends MetricsT 11 | case class Metrics(address: String, timestamp: Long, cpu: Double) extends MetricsT 12 | 13 | case class SimpleClusterResponse(status: String, details: ResponseDetails) 14 | 15 | sealed trait ResponseDetails 16 | case class MetricsDetails(metrics: MetricsT) extends ResponseDetails 17 | implicit def Metrics2ResponseDetails(metrics: MetricsT) = MetricsDetails(metrics) 18 | case class ErrorDetails(message: String) extends ResponseDetails 19 | implicit def Throwable2ResponseDetails(error: Throwable) = ErrorDetails(error.getMessage()) 20 | 21 | val ActorSystemName = "ClusterSystem" 22 | val FrontendActorName = "sampleClusterFrontend" 23 | val FrontendActorRoleName = "frontend" 24 | val BackendRouterName = "sampleClusterBackendRouter" 25 | val BackendActorName = "sampleClusterBackend" 26 | val BackendActorRoleName = "backend" 27 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterFrontend.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.concurrent.duration._ 4 | import com.typesafe.config.ConfigFactory 5 | import akka.actor.Actor 6 | import akka.actor.ActorLogging 7 | import akka.actor.ActorSystem 8 | import akka.actor.Props 9 | import akka.routing.FromConfig 10 | import akka.actor.ReceiveTimeout 11 | import akka.http.Http 12 | import akka.http.server.Directives._ 13 | import akka.stream.FlowMaterializer 14 | import scala.concurrent.ExecutionContext.Implicits.global 15 | import akka.util.Timeout 16 | import akka.actor.ActorRef 17 | import akka.actor.ActorContext 18 | import akka.cluster.Cluster 19 | import scala.language.postfixOps 20 | import SampleClusterDefs._ 21 | 22 | trait BackendRouterProvider { 23 | def newBackendRouter(context: ActorContext): ActorRef 24 | } 25 | 26 | trait BackendRouterProviderImpl extends BackendRouterProvider { 27 | def newBackendRouter(context: ActorContext) = context.actorOf(FromConfig.props(), name = BackendRouterName) 28 | } 29 | 30 | class SampleClusterFrontend() extends Actor with ActorLogging { 31 | 32 | this: BackendRouterProvider => 33 | 34 | implicit val timeout = Timeout(5 seconds) 35 | 36 | val backendRouter = newBackendRouter(context) 37 | 38 | def receive = { 39 | case c: GetActorMetrics => 40 | backendRouter.forward(c) 41 | case ReceiveTimeout => 42 | log.info("Timeout") 43 | } 44 | } 45 | 46 | object SampleClusterFrontend extends SampleClusterHttpRoute { 47 | def main(args: Array[String]): Unit = { 48 | 49 | val host = if (args.isEmpty) "localhost" else args(0) 50 | val port = if (args.isEmpty || args.length == 1) 8080 else args(1).toInt 51 | 52 | val config = ConfigFactory.parseString(s"akka.cluster.roles = [$FrontendActorRoleName]") 53 | .withFallback(ConfigFactory.load("application")) 54 | 55 | implicit val system = ActorSystem(ActorSystemName, config) 56 | system.log.info("Sample Cluster System will start when there is a minimum number of backend members in the cluster.") 57 | 58 | Cluster(system) registerOnMemberUp { 59 | val frontEnd = system.actorOf(Props(new SampleClusterFrontend with BackendRouterProviderImpl), name = FrontendActorName) 60 | implicit val materializer = FlowMaterializer() 61 | Http().bind(host, port) startHandlingWith { 62 | logRequestResult("A") { 63 | route(frontEnd) 64 | } 65 | } 66 | 67 | } 68 | 69 | } 70 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterHttpRoute.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import akka.http.marshalling._ 4 | import akka.http.model._ 5 | import akka.http.server.Directives._ 6 | import akka.http.server.Route 7 | import akka.stream.FlowMaterializer 8 | import akka.util.Timeout 9 | import akka.pattern.ask 10 | import scala.concurrent.ExecutionContext.Implicits.global 11 | import scala.concurrent.duration._ 12 | import scala.language.postfixOps 13 | import akka.actor.ActorRef 14 | import SampleClusterDefs._ 15 | import akka.cluster.NodeMetrics 16 | import scala.util.Success 17 | import scala.util.Failure 18 | import com.boldradius.util.Json4sSupport 19 | 20 | trait SampleClusterHttpRoute extends Json4sSupport { 21 | 22 | implicit val timeout = Timeout(3 seconds) 23 | 24 | def route(frontendActor: ActorRef)(implicit fm: FlowMaterializer): Route = { 25 | 26 | get { 27 | path("cluster") { 28 | onComplete((frontendActor ? GetActorMetrics()).mapTo[MetricsT]) { 29 | case Success(metrics) => 30 | complete(SimpleClusterResponse("success", metrics)) 31 | case Failure(f) => 32 | complete(SimpleClusterResponse("error", f)) 33 | } 34 | } 35 | } 36 | } 37 | } 38 | 39 | -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/util/Json4sSupport.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.util 2 | 3 | 4 | import akka.http.marshalling._ 5 | import akka.http.model._ 6 | import akka.http.unmarshalling._ 7 | import akka.stream.FlowMaterializer 8 | import org.json4s._ 9 | import org.json4s.native.Serialization 10 | import org.json4s.native.Serialization.{read, write} 11 | import scala.language.implicitConversions 12 | 13 | import scala.concurrent.{Future, ExecutionContext} 14 | import scala.concurrent.duration._ 15 | 16 | trait Json4sSupport { 17 | 18 | implicit val formats = DefaultFormats 19 | implicit val formatsNative = Serialization.formats(NoTypeHints) 20 | 21 | implicit def json4sFromRequestUnmarshaller[T:Manifest](implicit fm:FlowMaterializer, ex:ExecutionContext):FromRequestUnmarshaller[T] = 22 | new Unmarshaller[HttpRequest,T] { 23 | def apply(req: HttpRequest): Future[T] = { 24 | req.entity.withContentType(ContentTypes.`application/json`).toStrict(5.second) 25 | .map(_.data.toArray).map(x => read[T](new String(x))) 26 | } 27 | } 28 | 29 | implicit def json4sFromResponseUnmarshaller[T:Manifest](implicit fm:FlowMaterializer, ex:ExecutionContext):FromResponseUnmarshaller[T] = 30 | new Unmarshaller[HttpResponse,T] { 31 | def apply(res: HttpResponse): Future[T] = { 32 | res.entity.withContentType(ContentTypes.`application/json`) 33 | .toStrict(5.second).map(_.data.toArray) 34 | .map(x => read[T](new String(x))) 35 | } 36 | } 37 | 38 | implicit def json4sToEntityMarshaller[T <: AnyRef]:ToEntityMarshaller[T] = 39 | Marshaller.withFixedCharset[T, MessageEntity](MediaTypes.`application/json`,HttpCharset.custom("*"))( tp => 40 | HttpEntity(write[T](tp))) 41 | 42 | 43 | implicit def json4sToHttpEntityMarshaller[T <: AnyRef](t:T):ResponseEntity = HttpEntity(MediaTypes.`application/json`, write[T](t)) 44 | 45 | 46 | 47 | 48 | } 49 | -------------------------------------------------------------------------------- /src/test/scala/com/boldradius/sample/cluster/FrontendSpec.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import org.junit.runner.RunWith 4 | import org.scalatest.junit.JUnitRunner 5 | import org.scalatest.BeforeAndAfterAll 6 | import org.scalatest.FlatSpec 7 | import org.scalatest.Matchers 8 | import akka.testkit.TestActorRef 9 | import akka.testkit.TestKit 10 | import akka.actor.ActorSystem 11 | import org.scalatest.FlatSpecLike 12 | import akka.pattern.ask 13 | import scala.concurrent.duration._ 14 | import akka.util.Timeout 15 | import scala.util.Success 16 | import scala.util.Failure 17 | import akka.actor.Props 18 | import akka.actor.ActorContext 19 | import akka.testkit.TestProbe 20 | import akka.actor.ActorRef 21 | import akka.actor.Actor 22 | import SampleClusterDefs._ 23 | 24 | @RunWith(classOf[JUnitRunner]) 25 | class FrontendSpec 26 | extends TestKit(ActorSystem("TestSystem")) 27 | with FlatSpecLike 28 | with Matchers 29 | with BeforeAndAfterAll { 30 | 31 | override def afterAll() { 32 | system.shutdown() 33 | } 34 | 35 | class TestSampleClusterBackend(target: ActorRef) extends Actor { 36 | def receive = { 37 | case c: GetActorMetrics => target forward c 38 | } 39 | } 40 | 41 | trait TestBackend { 42 | val backendProbe = TestProbe() 43 | trait BackendRouterProviderTest extends BackendRouterProvider { 44 | def newBackendRouter(context: ActorContext) = context.actorOf(Props(new TestSampleClusterBackend(backendProbe.ref))) 45 | } 46 | } 47 | 48 | "GetActorMetrics message on frontend " should "triggers GetActorMetrics message on backend" in new TestBackend { 49 | 50 | val frontend = TestActorRef(Props(new SampleClusterFrontend with BackendRouterProviderTest)) 51 | 52 | frontend ! GetActorMetrics() 53 | 54 | backendProbe.expectMsg(GetActorMetrics()) 55 | 56 | } 57 | } -------------------------------------------------------------------------------- /src/test/scala/com/boldradius/sample/cluster/HttpRouteSpec.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import org.junit.runner.RunWith 4 | import org.scalatest.junit.JUnitRunner 5 | import akka.actor.{ Actor, ActorRef, Props } 6 | import akka.http.model._ 7 | import akka.http.testkit._ 8 | import org.scalatest._ 9 | import scala.concurrent.duration._ 10 | import SampleClusterDefs._ 11 | import akka.cluster.NodeMetrics 12 | import akka.actor.Address 13 | import akka.testkit.TestActorRef 14 | 15 | @RunWith(classOf[JUnitRunner]) 16 | class HttpRouteSpec extends FlatSpecLike 17 | with ScalatestRouteTest 18 | with MustMatchers 19 | with BeforeAndAfterAll 20 | with SampleClusterHttpRoute { 21 | 22 | override def afterAll() { 23 | system.shutdown() 24 | } 25 | 26 | /* Should be set! 27 | ** Otherwise returns: 28 | ** 'Request was neither completed nor rejected within 1 second'. 29 | */ 30 | implicit val routeTestTimeout = RouteTestTimeout(5.second) 31 | 32 | trait TestFrontend { 33 | val testResp = Metrics(address = "test", timestamp = 1L, cpu = 0.1) 34 | val testFrontendActor = TestActorRef(Props(new Actor { 35 | def receive = { 36 | case c: GetActorMetrics => sender() ! testResp 37 | } 38 | })) 39 | } 40 | 41 | "/cluster " should "return metrics" in new TestFrontend { 42 | 43 | Get(Uri("/cluster")) ~> route(testFrontendActor) ~> check { 44 | 45 | responseAs[Any] must be(Map("status" -> "success", "details" -> Map("metrics" -> Map("address" -> "test", "timestamp" -> 1, "cpu" -> 0.1)))) 46 | } 47 | 48 | } 49 | } 50 | -------------------------------------------------------------------------------- /tutorial/index.html: -------------------------------------------------------------------------------- 1 | 2 |
3 |

Introduction

4 | A seed 'one action' microservice using akka-http, akka cluster with adaptive-group strategy along with link to instructions how to install, configure and run the cluster on AWS instances. 5 |
6 |
7 |

Features

8 | 22 |
23 | 24 | --------------------------------------------------------------------------------