Acknowledgement
- docker-library/haproxy https://github.com/docker-library/haproxy
- kubernetes/contrib https://github.com/kubernetes/contrib/tree/master/service-loadbalancer
- kubernetes/ingress https://github.com/kubernetes/ingress
- xenolf/lego https://github.com/appscode/lego
- kelseyhightower/kube-cert-manager https://github.com/kelseyhightower/kube-cert-manager
- PalmStoneGames/kube-cert-manager https://github.com/PalmStoneGames/kube-cert-manager
- Kubernetes cloudprovider implementation