I run the CoreOS k8s cluster on Mac OSX, which means it's running inside VirtualBox + Vagrant

I have in my service.yaml file:

```
spec:
  type: NodePort

```

When I type:

```
kubectl get services

```

I see:

```
NAME             CLUSTER_IP       EXTERNAL_IP   PORT(S)    SELECTOR                                
kubernetes       10.100.0.1       <none>        443/TCP    <none>                             
my-frontend      10.100.250.90    nodes         8000/TCP   name=my-app

```

What is the "nodes" external IP? How do I access my-frontend externally?