start minikube using hyperkit and setup rbac properly

step 1

# install hyperkit
curl -LO https://storage.googleapis.com/minikube/releases/latest/docker-machine-driver-hyperkit \
&& chmod +x docker-machine-driver-hyperkit \
&& sudo mv docker-machine-driver-hyperkit /usr/local/bin/ \
&& sudo chown root:wheel /usr/local/bin/docker-machine-driver-hyperkit \
&& sudo chmod u+s /usr/local/bin/docker-machine-driver-hyperkit

step 2

# add this to your ~/.bash_profile and then do `source ~/.bash_profile`
# then you can start minikube any time correctly by doing `minikube_start` from terminal
minikube_start () {
  minikube start --kubernetes-version=v1.9.0 --extra-config=apiserver.Authorization.Mode=RBAC --vm-driver hyperkit
  kubectl create clusterrolebinding add-on-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:default
  minikube dashboard
}