I am new to microservices. I have few apps to deploy as microservices.

I need a API and Load balancer. For API gateway I come to know about Ingress Nginx. But I am not sure hot setup load balancing. However I could configure it for API gateway as below.

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-service
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/use-regex: "true"
spec:
  rules:
    - host: example.dev
      http:
        paths:
          - path: /api/users/?(.*)
            backend:
              serviceName: auth-srv
              servicePort: 3000
          - path: /api/orders/?(.*)
            backend:
              serviceName: order-srv
              servicePort: 3000
          - path: /?(.*)
            backend:
              serviceName: client-srv
              servicePort: 3000

I also have one confusion:

Load balancer sits before API Gateway i.e nginx controller,

How would it I configure Ingress-Nginx for load balancing?

Because load balancer will redirect request to nginx controller

So, Load balancer -> API Gateway > /api/orders

Now, /api/orders -> order-srv -> pods

Clearly Load balancer should decide to which pod it should route the request?

How can I achieve that?