Reverb

You can deploy a dedicated Laravel Reverb service for WebSocket traffic. Reverb runs as a worker-style container using php artisan reverb:start, but SST Laravel also attaches a load balancer so you can give it its own public domain.

const app = new LaravelService('MyLaravelApp', {
  web: {
    domain: 'app.example.com',
  },

  reverb: {
    domain: {
      dns: sst.cloudflare.dns(),
      name: 'ws.example.com',
    },
  },
});

return {
  url: app.url,
  reverbUrl: app.reverbUrl,
};

To run Reverb with the default settings, set reverb: true. Check all the reverb options in the API reference.

Environment variables

When reverb.domain is configured, SST Laravel automatically injects the Reverb server variables:

REVERB_SERVER_HOST=0.0.0.0
REVERB_SERVER_PORT=8080
REVERB_HOST=ws.example.com
REVERB_PORT=443
REVERB_SCHEME=https

Load balancer hardening

Reverb has its own load balancer, hardened by default like the one of web. The loadBalancer options (sslPolicy, ingressCidrs, accessLogs) work on reverb the same way. See Load Balancer.

Scaling

If you enable horizontal scaling for Reverb, make sure your Laravel application is configured for Reverb scaling with Redis.