Kamon is not reporting the data to prometheus - scala

Question

I have web service which is built using scala-play(version 2.5.12) framework. Trying to capture metrics using kamon and prometheus.
Below is the code snippet which i have done so far.
Dependencies:
"io.kamon" %% "kamon-play-2.5" % "1.1.0",
"io.kamon" %% "kamon-core" % "1.1.0",
"org.aspectj" % "aspectjweaver" % "1.9.2",
"io.kamon" %% "kamon-prometheus" % "1.1.1"
conf/application.conf
kamon {
metric {
tick-interval = 1 second
}
metric {
filters {
trace.includes = [ "**" ]
akka-dispatcher.includes = [ "**" ]
}
}
modules {
kamon-log-reporter.auto-start = no
}
}
I have initialized the kamon reporter in one of my config file.
import kamon.Kamon
import kamon.prometheus.PrometheusReporter
Kamon.addReporter( new PrometheusReporter() )
I am adding tracing in one of my controller
import kamon.play.action.OperationName
override def test(userName: Option[String]): Action[JsValue] = OperationName("test-access") {
Action.async(parse.json) {
......
}
}
I am building the jar and running in local with below command
/bin/example-app -J-javaagent:./lib/org.aspectj.aspectjweaver-1.9.2.jar -Dorg.aspectj.tracing.factory=default
Application is running and i can see in the logs that reporter has started.
Below is the log
2018-12-07 12:06:20,556 level=[INFO] logger=[kamon.prometheus.PrometheusReporter] thread=[kamon.prometheus.PrometheusReporter] rid=[] user=[] message=[Started the embedded HTTP server on http://0.0.0.0:9095]
But I don't see anything in http://localhost:9095/metrics. It is empty.
There is no error and unable to debug this. Is there anything i am missing here?

Answer 1

Documentation says that the metrics are exposed at http://localhost:9095/. There is no metrics endpoint.