LoggerMulticastBackend

An Elixir Logger backend that uses multicast UDP to deliver log messages. Designed for headless embedded applications, it allows watching the log over the local network.

Easy Defaults

In your logger config, simply do something like this:

config :logger,
        backends: [ :console, LoggerMulticastBackend ],
        level: :debug,
        format: "$time $metadata[$level] $message\n"

or, at runtime, you can add this to your current config...

Logger.add_backend LoggerMulticastBackend

Now, you'll have logging messages sent out on the default target multicast address, which is 224,0,0,224:9999.

Custom Target Configuration

Don't like the default multicast target or format? change it by replacing LoggerMulticastBackend in the above examples with a tuple including options something like this:

config :logger, backends: [ 
                    :console, 
                    {LoggerMulticastBackend, 
                        target: {{224,1,22,223}, 4252},
                        level:  :info}
                ]

The full range of custom configuration options in the tuple are as follows:

:target - a tuple of the target unicast or multicast address and port, like {{241,0,0,3}, 2}

:level - the level to be logged by this backend. Note that messages are first filtered by the general level configuration in :logger

:format - the format message used to print logs. Defaults to: "$time $metadata[$level] $levelpad$message\n"

:metadata - the metadata to be printed by $metadata. Defaults to an empty list (no metadata)