const cluster = require("cluster"); const physicalCpuCount = require("physical-cpu-count") if (cluster.isPrimary) { console.log(`Primary ${process.pid} is running`); // Fork workers. for (let i = 0; i < physicalCpuCount; i++) { cluster.fork(); } cluster.on('exit', (worker, code, signal) => { console.log(`worker ${worker.process.pid} died`); }); } else { // worker task require("./create-server"); }