Setting Log Message Status in Google Cloud Logs From Nodejs

If you're using Cloud Run or Cloud Functions on GCP you have probably use Cloud Logging to see error message or other output from your applications. Ifwant to have more control over how your log messages are flagged in you Nodejs applications, try the npm package @google-cloud/logging.

First install the npm package and create a file you can require where needed to handle the logging.

npm install @google-cloud/logging

const { Logging } = require('@google-cloud/logging');
let log;

async function initLog(
    projectId = 'myprojectid-11122233', // Your GCP project ID
    logName = 'your-applications-log-name' // Your app log name
  ) {
    // Creates a client
    const logging = new Logging({projectId});
  
    // Selects the log to write to
    log = logging.log(logName);
  
  }

  initLog();

  module.exports = { log };

To use the file just require it where you need it in your Nodejs app.

const { log } = require('./helpers/gcplogs.js');

Then you can log message with different flags. Here are some examples.

Warning

Usage:

// Warning 
log.warning(log.entry("This is a test of gcp logs package - log.warning"))

Output:

Error

Usage:

// Error
log.error(log.entry("This is a test of gcp logs package - log.error"))

Output:

Alert

Usage:

// Alert 
log.alert(log.entry("This is a test of gcp logs package - log.alert"))

Output:

Info

Usage:

// Info
log.info(log.entry("This is a test of gcp logs package - log.info"))

Output:

Standard

// Standard
log.write(log.entry("This is a test of gcp logs package - log.write"))

Output:

If you want to dig into it more you can check it out here.

@google-cloud/logging

Stackdriver Logging Client Library for Node.js

npm