Tested:
```
$ PROJECT=${CLOUDSDK_CORE_PROJECT} KUBERNETES_SKIP_CONFIRM=y NUM_NODES=2 \
  NUM_WINDOWS_NODES=2 KUBE_GCE_ENABLE_IP_ALIASES=true go run \
  ./hack/e2e.go -- --up
$ cluster/log-dump/log-dump.sh
$ ls _artifacts
```

And with: NUM_NODES=2 NUM_WINDOWS_NODES=0; NUM_NODES=0 NUM_WINDOWS_NODES=2