Kubernetes network proxy runs on each node.
The Kubernetes network proxy runs on each node. This reflects services as
defined in the Kubernetes API on each node and can do simple TCP,UDP stream
forwarding or round robin TCP,UDP forwarding across a set of backends. Service
cluster ips and ports are currently found through Docker-links-compatible
environment variables specifying ports opened by the service proxy. There is
an optional addon that provides cluster DNS for these cluster IPs. The user
must create a service with the apiserver API to configure the proxy.