Dead-simple one-liner for clustered apps.

throng(start, { workers: 3 });

function start() {
  console.log('Started worker');

  process.on('SIGTERM', function() {
    console.log('Worker exiting');
    process.exit();
  });
}

npm install --save throng

throng(startFunction, options);

Number of Cluster workers to create. Defaults to number of CPUs available.

Minimum time to keep the Cluster alive (by forking new workers if any die).

In milliseconds; defaults to zero.

(Infinity = stay up forever)

Grace period for worker shutdown. Once each worker is sent SIGTERM, the grace period starts. Any workers still alive when it ends are killed.

In milliseconds; defaults to 5000.

This is how you might use throng in a web server:

var throng = require('throng');

throng(start, {
  workers: 4,
  lifetime: Infinity,
  grace: 4000
});

npm test