fork child process from master using node-cluster and let them re-spawn after a minimum interval but before a maximum interval

server.js

const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').cpus().length;

const min = 5 * 1000;
const max = 10 * 1000;
const waitBeforeKill = 2 * 1000;

cluster.on("fork", (worker) => {
	console.log("worker forked: ", worker.process.pid);
});

cluster.on("online", (worker) => {
	console.log("worker became online: ", worker.process.pid);
	setTimeout(() => {
		worker.disconnect();
	}, min + (Math.random() * (max - min)));
});

cluster.on("disconnect", (worker) => {
	console.log("worker disconnected: ", worker.proces.pid);
	setTimeout(() => {
		worker.kill();
	}, waitBeforeKill);
});

cluster.on("exit", (worker, code, signal) => {
	cluster.fork();
});


if (cluster.isMaster) {
	console.log("cluster is a Master");

	for (let i = 0; i < numCPUs; i++) {
		const worker = cluster.fork();
	}
} else {
	console.log("cluster is a Worker");
	http.createServer((req, res) => {
		setTimeout(() => { // Added delay to make the response time longer
			res.writeHead(200);
		    res.end('hello world\n');
		}, 1000 * 1);
	}).listen(8000);

	console.log(`Worker ${process.pid} started`);
}

// ab -n100 -c5 http://localhost:8000/