Proxy and Service Discovery for Colyseus

For a quickstart see Configuring Proxy + Colyseus + PM2

The easiest way to get @colyseus/proxy running is to install it globally.

This can be done by running:

npm install -g @colyseus/proxy

Edit your runtime environment to contain the following environment variables:

• PORT is the port the proxy will be running on.
• REDIS_URL is the path to the same Redis instance you're using on Colyseus' processes.

Once installed it can be run with

colyseus-proxy

Clone, this project and install its dependencies:

git clone https://github.com/colyseus/proxy.git
cd proxy
npm install

Edit your environment to contain the following environment variables:

• PORT is the port the proxy will be running on.
• REDIS_URL is the path to the same Redis instance you're using on Colyseus' processes.

Start the proxy server:

npx ts-node proxy.ts

• Install @colyseus/proxy (npm install --save @colyseus/proxy)
• Configure RedisPresence
• Configure MongooseDriver
• Bind each instance of the server on a different port
• Use PM2 to manage Colyseus and Proxy instances

Configure the colyseus application:

import { Server, RedisPresence } from "colyseus";
import { MongooseDriver } from "colyseus/lib/matchmaker/drivers/MongooseDriver"

// binds each instance of the server on a different port.
const PORT = Number(process.env.PORT) + Number(process.env.NODE_APP_INSTANCE);

const gameServer = new Server({
    presence: new RedisPresence({
        url: "redis://127.0.0.1:6379/0"
    }),
    driver: new MongooseDriver(),
})

gameServer.listen(PORT);
console.log("Listening on", PORT);

It's recommended to use PM2 to manage your server instances. PM2 allows to scale Node.js processes up and down within your server. PM2 can also be used to manage and scale up the proxy instances.

npm install -g pm2

Use the following ecosystem.config.js configuration:

// ecosystem.config.js
const os = require('os');
module.exports = {
    apps: [
         {
            port        : 80,
            name        : "colyseus-proxy",
            script      : "./node_modules/@colyseus/proxy/bin/proxy",
            instances   : 1, // scale this up if the proxy becomes the bottleneck
            exec_mode   : 'cluster',
            env: {
                PORT: 80,
                REDIS_URL: "redis://127.0.0.1:6379/0"
            }
        },
        {
            port        : 8080,
            name        : "colyseus",
            script      : "lib/index.js", // your entrypoint file
            watch       : true,           // optional
            instances   : os.cpus().length,
            exec_mode   : 'fork',         // IMPORTANT: do not use cluster mode.
            env: {
                DEBUG: "colyseus:errors",
                NODE_ENV: "production",
            }
        }
    ]
}

Now you're ready to start multiple Colyseus proceses.

pm2 start

If you're using TypeScript, compile your project before running pm2 start, via npx tsc.

You should see the following output, depending on the amount of processes your server have:

[PM2][WARN] Applications colyseus not running, starting...
[PM2] App [colyseus] launched (2 instances)
┌──────────┬────┬─────────┬────────┬───┬─────┬───────────┐
│ Name     │ id │ mode    │ status │ ↺ │ cpu │ memory    │
├──────────┼────┼─────────┼────────┼───┼─────┼───────────┤
│ proxy    │ 0  │ cluster │ online │ 0 │ 0%  │ 7.4 MB    │
│ colyseus │ 1  │ fork    │ online │ 0 │ 0%  │ 15.4 MB   │
│ colyseus │ 2  │ fork    │ online │ 0 │ 0%  │ 12.3 MB   │
└──────────┴────┴─────────┴────────┴───┴─────┴───────────┘
Use `pm2 show <id|name>` to get more details about an app

Now, run pm2 logs to check if you don't have any errors.

MIT