A simple Node.js module for logging on AWS CloudWatch using Winston

cloudwatch_logger_module.js

"use strict";

let winston = require("winston");
let cloudWatchTransport = require("winston-aws-cloudwatch");

const set = function (options) {
    let logger = new winston.Logger({
        transports: [
            new winston.transports.Console({
                timestamp: true,
                colorize: true
            })
        ]
    });

    const config = {
        logGroupName: options.logGroupName,
        logStreamName: options.logStreamName,
        createLogGroup: false,
        createLogStream: true,
        awsConfig: {
            accessKeyId: options.awsConfig.accessKeyId,
            secretAccessKey: options.awsConfig.secretAccessKey,
            region: options.awsConfig.region
        },
        formatLog: function (item) {
            return item.level + ": " + item.message + " " + JSON.stringify(item.meta);
        }
    };

    logger.add(cloudWatchTransport, config);
    logger.level = "silly";

    logger.stream = {
        write: function (message, encoding) {
            logger.info(message);
        }
    };

    return logger;
};

module.exports = {
    set: set
};