@sentry/node

What is @sentry/node?

The @sentry/node package is a tool designed for real-time monitoring and fixing crashes in Node.js applications. It provides error tracking and performance monitoring, helping developers to quickly identify, diagnose, and fix problems in their applications. Sentry integrates seamlessly with your existing codebase, offering a range of features to enhance application reliability and user experience.

What are @sentry/node's main functionalities?

Error Tracking

Automatically capture exceptions and errors in your Node.js applications. The code initializes Sentry with your project's DSN and demonstrates how an uncaught exception is automatically reported to Sentry.

const Sentry = require('@sentry/node');
Sentry.init({ dsn: 'YOUR_DSN_HERE' });

app.get('/', function mainHandler(req, res) {
  throw new Error('Broke!');
});

Performance Monitoring

Track the performance of your application, including request times and slow operations. This code sample starts a transaction, simulates an operation with a timeout, and then finishes the transaction, which is then reported to Sentry for performance analysis.

const Sentry = require('@sentry/node');
const transaction = Sentry.startTransaction({ op: 'test', name: 'My First Test Transaction' });

setTimeout(() => {
  transaction.finish();
}, 99);

Custom Event Capturing

Send custom messages or events to Sentry. This is useful for capturing non-exception events that are significant for your application's health monitoring and diagnostics.

const Sentry = require('@sentry/node');

Sentry.captureMessage('Something went wrong', 'error');

Other packages similar to @sentry/node

bugsnag-js

Bugsnag provides error monitoring for web, mobile, and server applications. Similar to @sentry/node, it offers real-time error reporting and allows for detailed error diagnostics and performance monitoring. Bugsnag differentiates itself with features tailored to mobile app monitoring.

rollbar

Rollbar offers real-time error tracking and debugging tools for developers. Like @sentry/node, it supports multiple programming languages and frameworks, including Node.js. Rollbar emphasizes its ability to help teams with workflow integrations and automated error grouping for efficient management.

raygun

Raygun provides crash reporting, real-user monitoring, and deployment tracking. It's similar to @sentry/node in its core functionalities of error tracking and performance monitoring but also offers unique features like user journey tracking and version comparisons to understand the impact of deployments.

README

Official Sentry SDK for Node

Installation

npm install @sentry/node

# Or yarn
yarn add @sentry/node

Usage

Sentry should be initialized as early in your app as possible. It is essential that you call Sentry.init before you require any other modules in your application, otherwise auto-instrumentation of these modules will not work.

You need to create a file named instrument.js that imports and initializes Sentry:

// CJS Syntax
const Sentry = require('@sentry/node');
// ESM Syntax
import * as Sentry from '@sentry/node';

Sentry.init({
  dsn: '__DSN__',
  // ...
});

You need to require or import the instrument.js file before importing any other modules in your application. This is necessary to ensure that Sentry can automatically instrument all modules in your application:

// Import this first!
import './instrument';

// Now import other modules
import http from 'http';

// Your application code goes here

ESM Support

When running your application in ESM mode, you should use the Node.js --import command line option to ensure that Sentry is loaded before the application code is evaluated.

Adjust the Node.js call for your application to use the --import parameter and point it at instrument.js, which contains your Sentry.init() code:

# Note: This is only available for Node v18.19.0 onwards.
node --import ./instrument.mjs app.mjs

If it is not possible for you to pass the --import flag to the Node.js binary, you can alternatively use the NODE_OPTIONS environment variable as follows:

NODE_OPTIONS="--import ./instrument.mjs" npm run start

Links

• Official SDK Docs