[TBD]Secure handling of ingress traffic in Kubernetes

1. Ingress load balancer can provide

- SSL based access

-- Client cert auth

- SSL redirection

- Option to allow non secure access

-- HTTP based access

- Backend service to be SSL

- option to share CA cert for verifying backend server certificate

Reference

https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/auth/client-certs

https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#secure-backends