Add internal/external DNS node address types

cmd/kube-apiserver/app/options/options.go

@@ -79,9 +79,17 @@ func NewServerRunOptions() *ServerRunOptions {
 			Port:         ports.KubeletPort,
 			ReadOnlyPort: ports.KubeletReadOnlyPort,
 			PreferredAddressTypes: []string{
+				// --override-hostname
 				string(api.NodeHostName),
+
+				// internal, preferring DNS if reported
+				string(api.NodeInternalDNS),
 				string(api.NodeInternalIP),
+
+				// external, preferring DNS if reported
+				string(api.NodeExternalDNS),
 				string(api.NodeExternalIP),
+
 				string(api.NodeLegacyHostIP),
 			},
 			EnableHttps: true,

pkg/api/types.go

@@ -2718,6 +2718,8 @@ const (
 	NodeHostName     NodeAddressType = "Hostname"
 	NodeExternalIP   NodeAddressType = "ExternalIP"
 	NodeInternalIP   NodeAddressType = "InternalIP"
+	NodeExternalDNS  NodeAddressType = "ExternalDNS"
+	NodeInternalDNS  NodeAddressType = "InternalDNS"
 )
 
 type NodeAddress struct {

pkg/api/v1/types.go

@@ -3142,6 +3142,8 @@ const (
 	NodeHostName     NodeAddressType = "Hostname"
 	NodeExternalIP   NodeAddressType = "ExternalIP"
 	NodeInternalIP   NodeAddressType = "InternalIP"
+	NodeExternalDNS  NodeAddressType = "ExternalDNS"
+	NodeInternalDNS  NodeAddressType = "InternalDNS"
 )
 
 // NodeAddress contains information for the node's address.