I'm trying my hands on kubernetes and come across very basic question. I have setup single node kubernetes on ubuntu running in VirtualBox. This is exactly what I have. My vagrant file is something like this (so on my mac I can have virtualbox running ubuntu)-

Vagrant.configure("2") do |config|
  config.vm.synced_folder ".", "/vagrant"

  config.vm.define "app" do |d|

  d.vm.box = "ubuntu/trusty64"

  d.vm.hostname = "kubernetes"

  # Create a private network, which allows host-only access to the machine
  # using a specific IP.
  d.vm.network "private_network", ip: "192.168.20.10"

  d.vm.provision "docker"

  end
end

And to start the master I have init.sh something like this-

docker run --net=host -d gcr.io/google_containers/etcd:2.0.9 /usr/local/bin/etcd --addr=127.0.0.1:4001 --bind-addr=0.0.0.0:4001 --data-dir=/var/etcd/data

docker run --net=host -d -v /var/run/docker.sock:/var/run/docker.sock \
gcr.io/google_containers/hyperkube:v0.18.2 /hyperkube kubelet \
    --api_servers=http://localhost:8080 \
    --v=2 \
    --address=0.0.0.0 \
    --enable_server \
    --hostname_override=127.0.0.1 \
    --config=/etc/kubernetes/manifests

docker run -d --net=host --privileged gcr.io/google_containers/hyperkube:v0.18.2 /hyperkube proxy --master=http://127.0.0.1:8080 --v=2

wget http://storage.googleapis.com/kubernetes-release/release/v0.19.0/bin/linux/amd64/kubectl
sudo chmod +x ./kubectl

This brings up simple kubernetes running in vm. Now I can see kubernetes services running if I get services using kubectl-

kubernetes            component=apiserver,provider=kubernetes                          <none>                  10.0.0.2     443/TCP
kubernetes-ro         component=apiserver,provider=kubernetes                          <none>                  10.0.0.1     80/TCP

I can curl in ssh to 10.0.0.1 and see the result. But My question is how can I expose this kubernetes master service to host machine or when I deploy this thing on server, how can I make this master service available to public ip ?