How to: Is Kubernetes rack aware or can you detect what region or Availability Zone a host is in?
A Kubernetes node has some useful pieces of information attached as labels here are some examples:
```
    beta.kubernetes.io/instance-type: c3.xlarge
    failure-domain.beta.kubernetes.io/region: us-east-1
    failure-domain.beta.kubernetes.io/zone: us-east-1b
    kubernetes.io/hostname: ip-172-31-0-10.us-east-1.compute.internal
```
You can use these for AZ awareness or attach your own labels and use the Downward API for additional flexibility.