sys.config

[
    {chokecherry, [
        {shaper, [
            {timeout, 1000},
            {log_queue_capacity, 10000}
        ]}
    ]},

    {lager, [
        {log_root, "log"},
        {async_threshold, 30},
        {async_threshold_window, 15},
        {error_logger_hwm, 60},
        {error_logger_redirect, true},
        {crash_log, "crash.log"},
        {crash_log_size, 10485760},
        {crash_log_date, "$D0"},
        {crash_log_count, 9},
        {crash_log_msg_size, 65536},
        {handlers, [
            {lager_console_backend, [
                info,
                {lager_default_formatter, [date, " ", time, " ", node, " [", severity, "] [", module ,"] ", message, "\n"]}
            ]},
            {lager_file_backend, [
                {file, "error.log"},
                {level, error},
                {sync_on, critical},
                {size, 10485760},
                {date, "$D0"},
                {count, 5},
                {formatter_config, [date, " ", time, " ", node, " [", severity, "] [", module ,"] ", message, "\n"]}
            ]},
            {lager_file_backend, [
                {file, "info.log"},
                {level, info},
                {sync_on, critical},
                {size, 10485760},
                {date, "$D0"},
                {count, 5},
                {formatter_config, [date, " ", time, " ", node, " [", severity, "] [", module ,"] ", message, "\n"]}
            ]}
        ]}
    ]},

    %% SASL config
    {sasl, [
        {sasl_error_logger, {file, "log/sasl-error.log"}},
        {errlog_type, error},
        {error_logger_mf_dir, "log/sasl"},
        {error_logger_mf_maxbytes, 10485760},
        {error_logger_mf_maxfiles, 5}
    ]}
].