MaaS: How to Monitor Node.js App Performance with PM2 & InfluxDB

This tutorial demonstrates how to build a Metrics as a Service (MaaS) solution for Node.js applications using PM2 and InfluxDB. The application collects, stores, and analyzes critical performance metrics, enabling data-driven decisions and improved user experience. Key technologies include Node.js with Express framework, PM2, InfluxDB 3.0 Cloud, InfluxDB Node.js v3 Client Library, and dotenv for keeping credentials private. The process involves collecting server metrics with PM2, writing metrics to an InfluxDB bucket every five seconds, querying metrics using SQL from InfluxDB, and visualizing the data in the web app or InfluxDB Cloud Data Explorer.