Explanations needed on routing

[YannickTeKulve]

I was reading up on nginx-gateway-fabric here: https://docs.nginx.com/nginx-gateway-fabric/how-to/traffic-management/routing-traffic-to-your-app/

The documentation states the following:
The coffee service is omitted from the diagram above because the NGINX Gateway Fabric routes directly to the pods that the coffee service targets.

Doest this mean the service is not being used for load balancing over pods?

Whatever the answer a follow up question I have is: how does grpc loadbalancing work (if at all)?

[pleshakov]

Doest this mean the service is not being used for load balancing over pods?

correct. NGINX connects directly to the pod IPs.

Whatever the answer a follow up question I have is: how does grpc loadbalancing work (if at all)?

NGINX load balances each underlying POST request among backend pods. NGINX Gateway Fabric configures NGINX to use random two least_conn load -balancing method. https://nginx.org/en/docs/http/ngx_http_upstream_module.html#random