I'm working on a little gRCP API and I've run into a small issue. I want the gRPC service to be accessible from a React front end, which means I need to have an envoy proxy that translates gRPC -> HTTP1 and vice versa.

TL;DR I think I can reach the envoy proxy, but the proxy isn't routing to my service correctly.

I'll put the info for the services here and explain what's happening below.

K8s (deployment and service) yaml files for each of my services:
Simulation deployment

Envoy config file and docker image
Envoy Config
Envoy Dockerfile

Here is a quick sanity check making sure that my service works, disregarding the envoy proxy:

> kubectl get services
NAME              TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
kubernetes        ClusterIP   10.96.0.1        <none>        443/TCP          37d
sim-dep           NodePort    10.105.65.65     <none>        9090:30780/TCP   3s
sim-dep-http1     NodePort    10.111.190.170   <none>        8080:30948/TCP   3s
sim-envoy-proxy   NodePort    10.110.178.132   <none>        9091:32068/TCP   17h

> curl <minikube ip>:30948/v1/todo/all
{"api":"v1","toDos":[{}]}

> ./client-grpc -server=192.168.99.100:30780
<success from server, too much to put here but it works>

So from what I understand, this envoy proxy should accept connections on port 9091, then re-route them to the address sim-dep (K8s DNS is running) on port 9090.
Here is my code and error when I run this on a React app on my host machine (not in minikube).

var todoService = new ToDoServiceClient(
   "http://192.168.99.100:32068/",
   null,
   null
);
var todo = new ToDo();
todo.setTitle("JS Created ToDo");
todo.setDescription("This todo was created with JS client");
var createRequest = new CreateRequest();
createRequest.setApi("v1");
createRequest.setTodo(todo);
var response = await todoService.create(createRequest, {}, <callback>);

Logs:

upstream connect error or disconnect/reset before headers

I'm assuming this means it can't connect at some level, but that error isn't very descriptive. I also can't curl through the envoy proxy, but I did try sending a request with PostMan and got this:

I'm not too sure what to make of that, but it sort of seems like it's reaching envoy but isn't reaching the service. I would appreciate any help on this! :) And let me know if I missed any info here. Thanks!