Comprehensive Guide to Integrating Sentry with Azure Functions in Node.js

Sentry is an open-source error tracking tool that allows developers to monitor, diagnose and resolve issues in real-time. Azure Functions is a serverless computing service provided by Microsoft Azure. Integrating Sentry with Azure Functions in Node.js is easy and can be done in a few simple steps. This guide will show you how to set up global exception handling in Azure Functions and integrate Sentry for multiple Azure Functions.

Step 1: Create a Sentry Account

The first step is to create a Sentry account. Go to https://sentry.io/signup/ and create a free account.

Step 2: Install the Sentry SDK

Next, install the @sentry/node package in your project by running the following command in your project directory:

npm install @sentry/node --save

Then, run npm install to install the package.

Step 3: Configure Sentry

Configure Sentry in your Azure Functions by setting the dsn value for your project, which is a unique identifier for your Sentry project.

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

Sentry.init({
  dsn: "YOUR_DSN_HERE",
});

Step 4: Global Exception Handling

For global exception handling, use the app object to set up exception handling middleware for all Azure Functions in your application.

const app = require("express")();

app.use(Sentry.Handlers.requestHandler());

app.use((err, req, res, next) => {
  res.status(500).json({ error: "Something went wrong" });
  Sentry.captureException(err);
});

module.exports = app;

Step 5: Integrate Sentry

Integrate Sentry with your Azure Function by importing the Sentry SDK and calling captureException to capture any errors that occur.

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

module.exports = async function (context, req) {
  try {
    // Your function code here
  } catch (error) {
    Sentry.captureException(error);
    context.res = {
      status: 500,
      body: {
        error: "Something went wrong",
      },
    };
  }
};

Step 6: Multiple Azure Functions

For multiple Azure Functions, create a separate file for global exception handling and import it in each Azure Function file.

globalExceptionHandler.js

const app = require("express")();
const Sentry = require("@sentry/node");

app.use(Sentry.Handlers.requestHandler());

app.use((err, req, res, next) => {
  res.status(500).json({ error: "Something went wrong" });
  Sentry.captureException(err);
});

module.exports = app;

myFunction/index.js

const app = require("../globalExceptionHandler");
const Sentry = require("@sentry/node");

module.exports = async function (context, req) {
  try {
    // Your function code here
  } catch (error) {
    Sentry.captureException(error);
    context.res = {
      status: 500,
      body: {
        error: "Something went wrong",
      },
    };
  }
};

Conclusion

Integrating Sentry with Azure Functions in Node.js is easy and provides real-time error tracking to quickly identify and resolve issues. Use global exception handling to capture errors in all Azure Functions and integrate Sentry by importing the SDK and calling captureException. For multiple Azure Functions, create a separate file for global exception handling and import it in each Azure Function file.