How can I integrate Prometheus with my Node.js application?

How can I integrate Prometheus with my Node.js application?

To integrate Prometheus with your Node.js application, you can use the 'prom-client' library. First, install it using npm.

What are the steps to set it up after installation?

After installing, you need to create a metrics endpoint in your app. Use the 'collectDefaultMetrics' function to gather default metrics.

Can you show me a code example?

Sure! Here's a simple example:

const client = require('prom-client');
const express = require('express');

const app = express();
const collectDefaultMetrics = client.collectDefaultMetrics;
collectDefaultMetrics();

app.get('/metrics', (req, res) => {
  res.set('Content-Type', client.register.contentType);
  res.end(client.register.metrics());
});

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

How do I visualize the metrics in Grafana?

To visualize metrics in Grafana, you need to set up Prometheus as a data source in Grafana and then create dashboards using the metrics collected.