https://github.com/hugojosefson/cluster-lab

Trying out the cluster module in Node.js.
https://github.com/hugojosefson/cluster-lab

Last synced: 29 days ago
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Trying out the cluster module in Node.js.

• Host: GitHub
• URL: https://github.com/hugojosefson/cluster-lab
• Owner: hugojosefson
• Created: 2016-02-18T19:27:46.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2023-01-07T19:27:10.000Z (almost 2 years ago)
• Last Synced: 2024-04-08T16:52:10.961Z (9 months ago)
• Language: JavaScript
• Homepage:
• Size: 566 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 9
• Metadata Files:
  • Readme: README.md

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README

        
# cluster-lab

Trying out the [cluster](https://nodejs.org/api/cluster.html#cluster_cluster)

module in Node.js.

## Prerequisites

- Node.js (a recent version); install via

  [nvm](https://github.com/nvm-sh/nvm#installing-and-updating).

- `yarn`; Install with `npm install -g yarn@latest`.

## Install

```bash

git clone https://github.com/hugojosefson/cluster-lab.git

cd cluster-lab

yarn

```

## Use

```bash

yarn start

> [email protected] start /surviving-data/code/cluster-lab

> node lib

Master: Cluster admin API ready at http://localhost:8001/

Worker 1: Reporting for duty.

Worker 1: App ready at http://localhost:8000/

Worker 5: Reporting for duty.

Worker 2: Reporting for duty.

Worker 5: App ready at http://localhost:8000/

Worker 4: Reporting for duty.

Worker 2: App ready at http://localhost:8000/

Worker 4: App ready at http://localhost:8000/

Worker 6: Reporting for duty.

Worker 3: Reporting for duty.

Worker 6: App ready at http://localhost:8000/

Worker 3: App ready at http://localhost:8000/

Worker 8: Reporting for duty.

Worker 7: Reporting for duty.

Worker 8: App ready at http://localhost:8000/

Worker 7: App ready at http://localhost:8000/

```

You can then browse the Cluster admin API at

[http://localhost:8001/](http://localhost:8001/) and also check in on a worker

at [http://localhost:8000/](http://localhost:8000/).

Each time you request [http://localhost:8000/](http://localhost:8000/), you

should get a separate worker (round-robin style).

Try killing one or more of the workers. Check their process id (pid) using the

Cluster admin API. Then use `kill` in a different terminal to kill the worker,

and see that the cluster master spins up a new worker.