greenlock-cluster-app

Greenlock-cluster-app is a tool for managing multiple node servers on one domain. The cluster uses greenlock-express to generate a SSL certificate, that is provided to each pod through ENV. Pods are accessible through their specified port.

Point a dynamic dns to your address. Install and start the app with your credentials and you can start hosting your secure servers.

The cluster starts pods with the 'start' script specified in the pod's package.json. The pods have access to a few ENV variables; The SSL certificate's process.env.CERT and process.env.PRIVKEY, process.env.PORT to be used as the server port, and the process.env.REPORT hook, which is very important. It send a signal back to the cluster with the process id. When the pod is stopped the cluster can kill the process.

After a restart of the cluster, pods that were previously online will automatically start up. When a pod crashes it will automatically be detected and stopped. The pod's status will be set to crashed. It will only restart manually.

First time; It can take a few minutes for the ssl certificates to appear.

Installation

mkdir greenlock-cluster

cd greenlock-cluster

npm init -y

npm i git+https://github.com/EthanHermsey/greenlock-cluster-app.git

npx greenlock-cluster-app

Setup

Fill in email, domain and homepage.

The email and domain will be used to get a ssl certificate and the homepage will be use for redirection when someone navigates to the domain.

Add pod

During setup a directory /pods will be created. You can add your node project folder here, it will automatically show up in the cluster. You can type 'list' to see all the pods.

Set pod

Use the set command to set up a pod to specify the port it will use and if the pod should auto-restart.

Up pod

Use the up command to start the pod.

Pod example

In the pod you will have access to:

• process.env.PORT
• process.env.PRIVKEY
• process.env.CERT
• process.env.REPORT

You have to add eval( process.env.REPORT )() to run the report hook. This is used to kill the process when the pod is stopped. When you forget to do this you will have to manually kill the process in a taskmanager.

It also works with websocket and socket.io. The packages need to be installed first.

"use strict";
const https = require( 'https' );
const express = require( 'express' );

//GREENLOCK CLUSTER PID HOOK
eval( process.env.REPORT )();

const app = express();
app.use( "/", function ( req, res ) {

	res.setHeader( "Content-Type", "text/html; charset=utf-8" );
	res.end( "Hello, World!\n\n💚 🔒.js" );

} );

const server = https.createServer(
	{
		key: process.env.PRIVKEY,
		cert: process.env.CERT
	},
	app
).listen( process.env.PORT || 3000, () => {

		console.log( `TestServer: Listening on port: ${process.env.PORT || 3000}` );

} );

new ws.Server( { server: server, path: '/' } );

Commands

• list

  List all available pods and see their status

• set [ name ] [ port ] [ auto-restart ]

  Set pod settings. [ name ] as string, [ port ] as number, [ auto-restart ] as true/false

• up [ name ]

  Start pod with name. You can use 'all' to select all pods

• down [ name ]

  Stop pod with name. You can use 'all' to select all pods

• log [ name ]

  Show logs for pod with name. You can use 'all' to select all pods

• help

  Shows the help menu.

• quit

  Exit cluster.