Node.js Web Development - Fourth Edition

Setting up PM2 to manage Node.js processes

There are many ways to manage server processes, to ensure restarts if the process crashes, and so on. We'll use PM2 (http://pm2.keymetrics.io/) because it's optimized for Node.js processes. It bundles process management and monitoring into one application.

Let's create a directory, init, in which to use PM2. The PM2 website suggests you install the tool globally but, as students of the Twelve Factor Application model, we recognize it's best to use explicitly declared dependencies and avoid global unmanaged dependencies.

Create a package.json file containing:

{  "name": "pm2deploy",  "version": "1.0.0",  "scripts": {    "start": "pm2 start ecosystem.json",    "stop": "pm2 stop ecosystem.json", "restart": "pm2 ...