sample.config

[
 %% kernel config
 {kernel, [{start_timer, true}]},

 %% SASL config
 {sasl, [
         {sasl_error_logger, {file, "log/sasl-error.log"}},
         {errlog_type, error},
         {error_logger_mf_dir, "log/sasl"},      % Log directory
         {error_logger_mf_maxbytes, 104857600},   % 100 MB max file size
         {error_logger_mf_maxfiles, 5}           % 5 files max
        ]},

%% Lager config
 {lager, [
          {handlers,
           [
            {lager_console_backend, warning},
            {lager_file_backend,
             [
              {"log/error.log", error, 104857600, "$D0", 5},
              {"log/timing.log", none, 104857600, "$D0", 5},
              {"log/ttserver.log", debug, 104857600, "$D0", 5}
             ]},
            {lager_logstash_backend, [
                                     {level,        info},
                                     {logstash_host, "127.0.0.1"},
                                     {logstash_port, 9125},
                                     {node_role,    "xmpp"},
                                     {node_version, "0.0.1"},
                                     {metadata, [
                                        {account_token,  [{encoding, string}]},
                                        {client_os,      [{encoding, string}]},
                                        {client_version, [{encoding, string}]}
                                     ]}
                                    ]}
           ]}
         ]}
].