Stateless Instances

To simply proxy requests to one of multiple instances of a container, you can use the getRandom function:

import { Container, getRandom } from "@cloudflare/containers";

const INSTANCE_COUNT = 3;

class Backend extends Container {
  defaultPort = 8080;
  sleepAfter = "2h";
}

export default {
  async fetch(request: Request, env: Env): Promise<Response> {
    // note: "getRandom" to be replaced with latency-aware routing in the near future
    const containerInstance = getRandom(env.BACKEND, INSTANCE_COUNT);
    return containerInstance.fetch(request);
  },
};

Note

This example uses the getRandom function, which is a temporary helper that will randomly select of of N instances of a Container to route requests to.

In the future, we will provide improved latency-aware load balancing and autoscaling.

This will make scaling stateless instances simple and routing more efficient. See the autoscaling documentation for more details.