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Node.js Winston Node.js Winston

Last Updated: Feb. 07, 2023

To learn how more about how to get started working with Winston, check out this guide we put together.


This document includes cluster dependent URL’s. Each URL has a variable part (in Italic). Please match this part with a row entry within the following table. Please Replace the “Cluster URL” in the “usage example” with the URL that matches the domain of your Coralogix account (.com, .in etc.).


You must provide the following four variables when creating a Coralogix logger instance.

Private Key – Your private key is a unique ID that represents your company.

Application Name – The name of your environment, for example, a company named “SuperData” would probably insert the “SuperData” string parameter or if they want to debug their test environment they might insert the “SuperData– Test”.

SubSystem Name – Your application probably has multiple components, for example: Backend servers, Middleware, Frontend servers etc. in order to help you examine the data you need, inserting the subsystem parameter is vital.

For more information on how to setup and use Winston head over to our guide as well as the Winston repository.

Winston usage example:

const os = require("os");
const winston = require("winston");

const logger = winston.createLogger({
    transports: [
        new winston.transports.Http({
            name: "coralogix",
            level: "info",
            format: winston.format((info) => ({
                applicationName: "nodejs",
                subsystemName: "winston",
                computerName: os.hostname(),
                timestamp: Date.now(),
                severity: {
                    silly: 1,
                    debug: 1,
                    verbose: 2,
                    info: 3,
                    warn: 4,
                    error: 5,
                    critical: 6
                }[info.level] || 3,
                text: info.message,
            host: "<CLUSTER_URL>",
            path: "/logs/rest/singles",
            headers: {
                "private_key": "<YOUR_PRIVATE_KEY>"
            ssl: true,
            batchInterval: 1000,
            handleExceptions: true
    exitOnError: false

logger.info("My info log line");

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