LoggerLagerBackend

A lager (https://github.com/basho/lager) backend for Elixir's Logger (http://elixir-lang.org/docs/master/logger/Logger.html).

That is, it routes messages generated with Logger.<level>() to lager. This is useful if you have a mixed Erlang/Elixir project and have decided to standardize on lager as a logging framework.

Known limitations:

You're on your own to configure and start lager.
Only lager's default sink (:lager_event) is used.
Performance is probably not ideal - all messages received are sent to lager regardless of the configured level and lager's compile-time optimization does not happen. However, Logger will still do its own optimization upstream of this backend.
Metadata is passed straight from Logger to lager, hoping that the keys match. It seems to be the case for the basics (module, function...) but may need looking into.

Installation

If available in Hex, the package can be installed as:

Add logger_lager_backend to your list of dependencies in mix.exs:
def deps do
```
 [{:logger_lager_backend, "~> 0.0.1"}]
```
end
Ensure logger_lager_backend is started before your application:
def application do
```
 [applications: [:logger_lager_backend]]
```
end

Configuration

config :logger,
  backends: [LagerLoggerBackend],
  level: :debug

Related projects

lager_logger does the opposite of this backend: it sends lager messages to Logger.
exlager offers an Elixir frontend to lager, which can be an alternative to this backend if you control all the code that does logging. But if you are using e.g. Ecto, which writes to Logger, exlager will not help you.