In addition to Bal Chua’s work and suggestions from silverfox, I would like to show you the method I used for Kubernetes to expose and manage incoming traffic from the outside:

Step 1: Deploy an application

In this example, Kubernetes sample hello application will run on port 8080/tcp

kubectl run web --image=gcr.io/google-samples/hello-app:1.0 --port=8080

Step 2: Expose your Deployment as a Service internally

This command tells Kubernetes to expose port 8080/tcp to interact with the world outside:

kubectl expose deployment web --target-port=8080 --type=NodePort

After, please check if it exposed running command:

kubectl get service web

Step 3: Manage Ingress resource

Ingress sends traffic to a proper service working inside Kubernetes.

Open a text editor and then create a file basic-ingress.yaml

with content:

apiVersion:  
extensions/v1beta1  
kind: Ingress  
metadata:      
  name: basic-ingress  
spec:      
  backend:
    serviceName: web
    servicePort: 8080

Apply the configuration:

kubectl apply -f basic-ingress.yaml

and that's all. It is time to test. Get the external IP address of Kubernetes installation:

kubectl get ingress basic-ingress

and run web browser with this address to see hello application working.

You will have to use kubernetes service. Service gives you a way to talk to your pods with static Ip and dns (if you're client app is inside the cluster).

https://kubernetes.io/docs/concepts/services-networking/service/

You can do it in several ways:

1. Easiest: Use kubernetes service with type: NodePort. Then you can access the pod using http://[nodehost]:[nodeport]
2. Use kubernetes ingress. See this link for more details (https://kubernetes.io/docs/concepts/services-networking/ingress/)
3. If you are running in the cloud like aws, azure or gce, you can use kubernetes service type LoadBalancer.