agourlay / lazy-tail   0.1.7


Stream your Logback logs to the Web.

Scala versions: 2.11

lazy-tail Build Status Download

Tired of geeks telling you to SSH into to read log files, tired of hipsters telling you to set up an Elasticsearch cluster to see some fancy dashboards?

Here comes lazy-tail - a library exposing the logs of any host application using Logback to the Web!

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3 endpoints available

  • /logs to access the slick web frontend.
  • /logs/tail with the optional HTTP param 'minLevel' to subscribe to the SSE stream of logs.
  • /logs/lastErrors to retrieve the last ERROR logs kept in memory.


Start by creating an instance of the LazyTail class - as an optional argument it takes the LoggerName you want to expose. (by default "ROOT")

new LazyTail()

then 2 alternatives are currently available on a LazyTail instance:

// starts an HTTP server on the provided port to expose logs.
def start(port: Int): Unit 

// returns an Akka-http Route containing the lazy-tail logic.
def route()(implicit system: ActorSystem): server.Route


lazy-tail depends on akka-http 1.0.

resolvers += "agourlay at bintray" at ""

libraryDependencies ++= List(
  "com.github.agourlay" %% "lazy-tail" % "0.1.7",


  • retrieve/specify a log pattern for the display format of the log.
  • statistics about errors (frequency by type, rate 1-5-15 ...)