rename ExternaID to something that is obviously deprecated

pkg/apis/core/types.go

@@ -3228,10 +3228,6 @@ type NodeSpec struct {
 	// +optional
 	PodCIDR string
 
-	// External ID of the node assigned by some machine database (e.g. a cloud provider)
-	// +optional
-	ExternalID string
-
 	// ID of the node assigned by the cloud provider
 	// Note: format is "<ProviderName>://<ProviderSpecificNodeID>"
 	// +optional
@@ -3249,6 +3245,11 @@ type NodeSpec struct {
 	// The DynamicKubeletConfig feature gate must be enabled for the Kubelet to use this field
 	// +optional
 	ConfigSource *NodeConfigSource
+
+	// Deprecated. Not all kubelets will set this field. Remove field after 1.13.
+	// see: https://issues.k8s.io/61966
+	// +optional
+	DoNotUse_ExternalID string
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object