prometheus-exporter library which provides exporting metrics from application as Prometheus metrics via akka-http library. It can be injected as a akka.http.scaladsl.server.Route or can be started as a separate akka-http server.
resolvers += Resolver.bintrayRepo("evolutiongaming", "maven")
libraryDependencies += "com.evolutiongaming" %% "prometheus-exporter" % "0.1.0"
Configuration for http server can be done via https://doc.akka.io/docs/akka-http/current/scala/http/configuration.html
import com.evolutiongaming.metrics.MetricCollectors
import io.prometheus.client._
lazy val collectors: MetricCollectors = new MetricCollectors()
val incomingEventsCounter: Counter =
collectors.registerCounter(_.name("events_in").help("Kafka input topic messages read"))
val fullTimer: Histogram =
collectors.registerHistogram(_.name("c2k_fullsystem_delay").help("From core to output in ms").labelNames("c2k_time")) import com.evolutiongaming.metrics.{MetricResources, Report}
lazy val collectors: MetricCollectors = ...
def metrics = Report(collectors)
val metricsRoute = new MetricResources(metrics).route
val route = metricsRoute ~ otherRoute import com.evolutiongaming.HttpServer
new HttpServer(Seq(metricsRoute, fooRoute, barRoute), "0.0.0.0", "8080")