how to get the list of process - node.js

Question

I am playing around with node and just installed it on my machine. Now I want to get a list of processes running on my machine so I can see whether Apache is running, MySQL is started, etc? How can I do that? I just have very basic code in my js file. I don't even know where to begin on this.
Here is my code:
var http = require('http');
http.createServer(function(request, response){
response.writeHead(200);
response.write("Hello world");
console.log('Listenning on port 1339');
response.end();
}).listen(8080);

Answer 1

As far as I know there isn't a module (yet) to do this cross-platform. You can use the child process API to launch tools that will give the data you want. For Windows, just launch the built-in tasklist process.
var exec = require('child_process').exec;
exec('tasklist', function(err, stdout, stderr) {
// stdout is a string containing the output of the command.
// parse it and look for the apache and mysql processes.
});

Answer 2

See ps-node
To get a list of processes in node:
var ps = require('ps-node');
ps.lookup({
command: 'node',
arguments: '--debug',
}, function(err, resultList ) {
if (err) {
throw new Error( err );
}
resultList.forEach(function( process ){
if( process ){
console.log( 'PID: %s, COMMAND: %s, ARGUMENTS: %s', process.pid, process.command, process.arguments );
}
});
});

Answer 3

ps-list is a better node package for the job, it is working on Linux, BSD, and Windows platforms too.
const psList = require('ps-list');
psList().then(data => {
console.log(data);
//=> [{pid: 3213, name: 'node', cmd: 'node test.js', cpu: '0.1'}, ...]
});

Answer 4

You can also use current-processes which lists all the processes.
https://www.npmjs.com/package/current-processes
The result includes name,pid,cpu and memory used by process.
You can also sort the result and limit the number of processes.
The result looks like this:
[ Process {
pid: 31834,
name: 'atom',
cpu: 84,
mem: { private: 19942400, virtual: 2048, usage: 0.4810941724241514 } }]

Answer 5

Solution for unix-like systems:
const child_process = require('child_process');
const displayProcessBy = (pattern) => {
let command = `ps -aux | grep ${pattern}`;
child_process.exec(command, (err, stdout, stdin) => {
if (err) throw err;
console.log(stdout);
});
}
Examples usage and results
displayProcessBy("nodejs");
setivol+ 7912 0.0 0.0 12732 2108 ? S 10:56 0:00 grep nodejs
setivol+ 12427 0.0 0.0 669552 712 pts/3 Tl Dec16 0:00 nodejs
setivol+ 14400 0.0 0.0 669552 644 pts/2 Tl Dec15 0:00 nodejs
setivol+ 14412 0.0 0.0 670576 224 pts/3 Tl Dec16 0:00 nodejs
setivol+ 14567 0.0 0.0 669552 436 pts/3 Tl Dec15 0:00 nodejs
setivol+ 14911 0.0 0.0 669552 0 pts/3 Tl Dec15 0:00 nodejs
setivol+ 15489 0.0 0.0 669552 712 pts/3 Tl Dec16 0:00 nodejs
setivol+ 15659 0.0 0.0 669520 0 pts/3 Tl Dec16 0:00 nodejs --harmony
setivol+ 16469 0.0 0.0 669520 704 pts/3 Tl Dec16 0:00 nodejs --harmony
setivol+ 20514 0.0 0.0 669552 664 pts/2 Tl Dec15 0:00 nodejs
displayProcessBy("python2")
setivol+ 8012 0.0 0.0 4336 712 ? S 10:58 0:00 /bin/sh -c ps -aux | grep python2
setivol+ 8014 0.0 0.0 12728 2240 ? S 10:58 0:00 grep python2
Testing environment
$ uname -a
Linux localhost 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 8.6 (jessie)
Release: 8.6
Codename: jessie

Answer 6

Seems there isn't any direct methods
but below videos might help.
Monitoring Long Running Processes with Node. (http://www.youtube.com/watch?v=zamGXhjim00)
CPU usage in real time with node.js & socket.io (http://www.youtube.com/watch?v=bPYgx9V6qAk)

Answer 7

Use the command line tools rather than node scripts.
ps -aef | grep node
This would list the visual studio code helpers and .nvm env processes. We can exclude them using
ps -aef | grep node | grep -v "Visual Studio" | grep -v ".nvm"
Additional tip to kill all the listed processes:
killall node