Запуск дочернего процесса из Node.JS

Дока по node.js на русском: https://js-node.ru. Раздел по дочерним процессам: https://js-node.ru/site/article?id=13
Документ на сайте webformyself: https://webformyself.com/node-js-masshtabirovanie-prilozheniya-s-pomoshhyu-child_process/

var childProcess = require('child_process');

function runScript(scriptPath, callback) {

// keep track of whether callback has been invoked to prevent multiple invocations

var invoked = false;

var process = childProcess.fork(scriptPath);

// listen for errors as they may prevent the exit event from firing

process.on('error', function (err) {

if (invoked) return;

invoked = true;

callback(err);

});

// execute the callback once the process has finished running

process.on('exit', function (code) {

if (invoked) return;

invoked = true;

var err = code === 0 ? null : new Error('exit code ' + code);

callback(err);

});

}

// Now we can run a script and invoke a callback when complete, e.g.

runScript('./some-script.js', function (err) {

if (err) throw err;

console.log('finished running some-script.js');

});