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Steno is a lightweight, modular logging library written specifically to support Cloud Foundry.


Steno is composed of three main classes: loggers, sinks, and formatters. Loggers are the main entry point for Steno. They consume user input, create structured records, and forward said records to the configured sinks. Sinks are the ultimate destination for log records. They transform a structured record into a string via a formatter and then typically write the transformed string to another transport.

Getting started

config =
  :sinks   => [],
  :codec   =>,
  :context =>


logger = Steno.logger("test")"Hello world!")
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