add bootstrap token to betav1

pkg/cluster/kubeadm/config.go

@@ -134,7 +134,7 @@ const ConfigTemplateBetaV1 = `# config generated by kind
 apiVersion: kubeadm.k8s.io/v1beta1
 kind: ClusterConfiguration
 kubernetesVersion: {{.KubernetesVersion}}
-clusterName: {{.ClusterName}}
+clusterName: "{{.ClusterName}}"
 # on docker for mac we have to expose the api server via port forward,
 # so we need to ensure the cert is valid for localhost so we can talk
 # to the cluster after rewriting the kubeconfig to point to localhost
@@ -143,7 +143,11 @@ apiServer:
 ---
 apiVersion: kubeadm.k8s.io/v1beta1
 kind: InitConfiguration
-# we use a random local port for the API server
+# we use a well know token for TLS bootstrap
+bootstrapTokens:
+- token: "{{ .Token }}"
+# we use a well know port for making the API server discoverable inside docker network. 
+# from the host machine such port will be accessible via a random local port instead.
 localAPIEndpoint:
   bindPort: {{.APIBindPort}}
 ---