Uinta

Uinta is a plugin for the default Elixir logger that lowers log volume while maximizing log usefulness. It is not a logger backend, but rather includes Uinta.Formatter which will format logs on top of the default Elixir logger backend.

In addition to the formatter, Uinta also includes Uinta.Plug. The plug is a drop-in replacement for Plug.Logger that will log out the request and response on a single line. It can also put the request info into the top-level JSON for easier parsing by your log aggregator.

Installation

The package can be installed by adding uinta to your list of dependencies in mix.exs:

def deps do
  [
    {:uinta, "~> 0.1"}
  ]
end

To use the formatter, you’ll need to add it to your logger configuration. In your (production) config file, look for a line that looks something like this:

config :logger, :console, format: "[$level] $message\\n"

You’ll want to replace it with this:

config :logger, :console, format: {Uinta.Formatter, :format}

To install the plug, find this line (typically in YourApp.Endpoint):

plug Plug.Logger

and replace it with this (using only the options you want):

plug Uinta.Plug, json: false, log: :info

Attribution

Much of this work, especially Uinta.Plug, is based on Elixir’s Plug.Logger