Question - What are the different ways to provide external network connectivity to K8?
Answer -
By default, POD should be able to reach the external network but vice-versa we need to make some changes. Following options are available to connect with POD from the outer world.
Nodeport (it will expose one port on each node to communicate with it)
Load balancers (L4 layer of TCP/IP protocol)
Ingress (L7 layer of TCP/IP Protocol)
Another method is to use Kube-proxy which can expose a service with only cluster IP on the local system port.
$ kubectl proxy --port=8080 $ http://localhost:8080/api/v1/proxy/namespaces//services/:/