🚀 Feature Request: Allow multiple workers to listen on different ports when started at the same time

[alexanderniebuhr]

Describe the solution

wrangler allows us to start multiple workers with wrangler dev -c ... -c .... This is great, however only the first worker will listen on a port to handle incoming requests. It would be great if we can maybe configure a port in wrangler.jsonc file, and then wrangler dev can listen on multiple ports and let the correct worker handle the request.
I do have the requirement to use one command to start multiple workers, because otherwise it doesn't support durable objects or workflows with cross-script calling setup, see: https://discord.com/channels/595317990191398933/1296923707792560189/1347818297856360478

There are also workarounds to build your own local worker, which routes requests, but I feel it would be much easier if we just listen on multiple ports see: https://discord.com/channels/595317990191398933/799437470004412476/1337995421749870613

[terozio]

I have exactly similar case and now I need to make a tradeoff of either being able to have RPC with Durable Objects, but the endpoints provided by secondary workers unavailable, or then I can run everything in separate dev instances but can't use RPC.

[mgandolfi7]

You can configure ports in wrangler.jsonc. Make sure to also have an inspector_port for debug.

	"dev": {
		"port": 8000,
		"inspector_port": 9000
	}

[alexanderniebuhr]

@mgandolfi7 thanks for that help, but it doesn't fix the issue I have :)

[jefflaporte]

The combination of this single listener port limitation with no service binding support across multiple wrangler dev launches (Service bindings not working across repositories in wrangler dev #9432) is really awful.

Running locally with DOs already means 2 wrangler.json files per worker. This dual limitation makes it impossible to actually run a non-trivial system locally.

Hoping for a solution to either this or #9432 soon. 🙏

[alexanderniebuhr]

This might be solvable by #12550

[petebacondarwin]

I think that #12600 solves the ability to use DOs across multiple Wranglers, so that should resolve this, right?