Node Stats Lite

Get real time stats of a running Node.js process. Can be used for Node.js service monitoring.

Installation

npm install node-stats-lite --save

Usage

const nodeStats = require('node-stats-lite');

This module can be used in 2 ways -

1. As an Express.js middleware

app.get('/monitor', nodeStats);

This will simply create a new API endpoint /monitor in your Express.js powered app. Then making a GET call to /monitor url path will provide all the stats.

2. As a function

If you're not using Express.js or are not interested in using it as a middleware and want more control then you can simply call the function without any arguments to get all the stats. The function returns a Promise object.

// using traditional promises
getStats().then((stats) => console.log(stats));

// using async-await
const stats = await getStats();

Output

The stats Object(Method 2) or the API response(Method 1) provides the following stats -

1. Node.js version running
2. Memory used by this Node service (in bytes)
3. Memory used by this Node service realtive to System memory (%)
4. CPU used by this Node service (%)
5. Name of the Node file which is executed
6. Uptime of this Node service (in seconds)
7. pid of this Node process

Sample response -

{
	"version": "v7.9.0",
	"service_name": "app.js",
	"cpu_usage": 1.4,
	"memory_consumed": 201768960,
	"memory_consumed_percent": 6.1,
	"uptime": 68231.624,
	"pid": 10790
}

Requirements

1. Node.js version >= 7.6.0
2. Linux based system