kamon-io / kamon-khronus

Kamon Khronus Integration

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Khronus Integration Build Status

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Reporting Metrics to Khronus

Khronus is an open source, distributed and reactive time series database designed to store, retrieve, analyze and process a large amount of custom metrics.

Getting Started

Kamon khronus module is currently available for Scala 2.10, 2.11 and 2.12.

Supported releases and dependencies are shown below.

kamon-khronus status jdk scala akka
0.6.7 stable 1.7+, 1.8+ 2.10, 2.11, 2.12 2.3.x, 2.4.x

To get started with SBT, simply add the following to your build.sbt file:

libraryDependencies += "io.kamon" %% "kamon-khronus" % "0.6.7"


Set kamon.khronus.host to point to your Khronus instance using a host:port value like Most likely, you will also want to set kamon.khronus.app-name to the application name you wish to report metric as.

These are the configuration keys available and their default values (taken from the reference.conf file supplied with this module):

kamon {
  khronus {
    host = ""
    app-name = "kamon-khronus"
    # Time interval in milliseconds to flush the buffer and send the accumulated metrics.
    # It must be less than the smallest time window configured in Khronus.
    interval = 3000
    # Maximum number of measures to hold in memory within intervals.
    # Past this threshold, metrics will be discarded.
    max-measures = 500000

Reported Metrics

This reporter will automatically subscribe itself to the following categories:

  • counter.
  • histogram.
  • gauge.
  • trace.
  • executor-service.

The other important categories like akka-*, system-metrics, and http-server were not included in this initial version due to time constraints. Also, there are no facilities for filtering categories. Please feel free to jump in!