I had a couple of questions regarding kubernetes ingress service [/controllers]

For example I have an nginx frontend image that I am trying to run with kubectl -

kubectl run <deployment> --image <repo> --port <internal-nginx-port>. 

Now I tried to expose this to the outer world with a service -

kubectl expose deployment <deployment> --target-port <port>. 

Then tried to create an ingress service with the following nignx-ing.yaml -

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: urtutorsv2ingress
  annotations:
    kubernetes.io/ingress.global-static-ip-name: "coreos"
spec:
  backend:
    serviceName: <service>
    servicePort: <port>

Where my ingress.global-static-ip-name is correctly created & available in Google cloud console. [I am assuming the service port here is the port I want on my "coreos" IP , so I set it to 80 initially which didn't work so I tried setting it same as the specified in the first step but it still didn't work.]

So, the issue is I am not able to access the frontend at both the urls http://COREOS_IP, http://COREOS_IPIP:

Which is why I tried to use -

kubectl expose deployment <deployment> --target-port <port>.  --type NodePort 

to see if it worked with a NodePort & I was able to access the frontend.

So, I am thinking there might be a configuration mistake here because of which I am not getting results with the ingress.

Can anyone here help debug / fix the issue ?