Running Kubernetes on CoreOS on Google Compute Engine and using persistent disk volume mounting requires a custom compiled kubelet binary.
See https://github.com/GoogleCloudPlatform/kubernetes/issues/7042
Compiling Kubernetes for Linux on OS X using docker-machine requires telling the build you don't use boot2docker directly:
DOCKER_NATIVE=true build/run.sh hack/build-go.sh
port-forward
relies on socat
which is not available on CoreOS.