How to: How can I get the host IP address from inside a pod?
In Kubernetes 1.4 the nodename is available in the downward API in the `spec.nodeName` variable. 

http://kubernetes.io/docs/user-guide/downward-api/

In AWS specifically, It may be easier to use the AWS metadata API and just `curl 169.254.169.254/1.0/meta-data/local-ipv4`