kubelet: promote OS & arch labels to GA

kubelet now applies both the beta and the GA labels to ensure backward
compatibility.

pkg/kubelet/apis/well_known_labels.go

@@ -30,16 +30,19 @@ const (
 
 	LabelInstanceType = "beta.kubernetes.io/instance-type"
 
-	LabelOS   = "beta.kubernetes.io/os"
+	LabelOS   = "kubernetes.io/os"
-	LabelArch = "beta.kubernetes.io/arch"
+	LabelArch = "kubernetes.io/arch"
+	// The OS/Arch labels are promoted to GA in 1.14. kubelet applies both beta
+	// and GA labels to ensure backward compatibility.
+	// TODO: stop applying the beta OS/Arch labels in Kubernetes 1.17.
+	LegacyLabelOS   = "beta.kubernetes.io/os"
+	LegacyLabelArch = "beta.kubernetes.io/arch"
 
 	// GA versions of the legacy beta labels.
 	// TODO: update kubelet and controllers to set both beta and GA labels, then export these constants
 	labelZoneFailureDomainGA = "failure-domain.kubernetes.io/zone"
 	labelZoneRegionGA        = "failure-domain.kubernetes.io/region"
 	labelInstanceTypeGA      = "kubernetes.io/instance-type"
-	labelOSGA                = "kubernetes.io/os"
-	labelArchGA              = "kubernetes.io/arch"
 
 	// LabelNamespaceSuffixKubelet is an allowed label namespace suffix kubelets can self-set ([*.]kubelet.kubernetes.io/*)
 	LabelNamespaceSuffixKubelet = "kubelet.kubernetes.io"
@@ -62,11 +65,12 @@ var kubeletLabels = sets.NewString(
 	LabelOS,
 	LabelArch,
 
+	LegacyLabelOS,
+	LegacyLabelArch,
+
 	labelZoneFailureDomainGA,
 	labelZoneRegionGA,
 	labelInstanceTypeGA,
-	labelOSGA,
-	labelArchGA,
 )
 
 var kubeletLabelNamespaces = sets.NewString(

pkg/kubelet/kubelet_node_status.go

@@ -151,6 +151,8 @@ func (kl *Kubelet) updateDefaultLabels(initialNode, existingNode *v1.Node) bool
 		kubeletapis.LabelInstanceType,
 		kubeletapis.LabelOS,
 		kubeletapis.LabelArch,
+		kubeletapis.LegacyLabelOS,
+		kubeletapis.LegacyLabelArch,
 	}
 
 	needsUpdate := false
@@ -213,9 +215,11 @@ func (kl *Kubelet) initialNode() (*v1.Node, error) {
 		ObjectMeta: metav1.ObjectMeta{
 			Name: string(kl.nodeName),
 			Labels: map[string]string{
-				kubeletapis.LabelHostname: kl.hostname,
+				kubeletapis.LabelHostname:   kl.hostname,
-				kubeletapis.LabelOS:       goruntime.GOOS,
+				kubeletapis.LabelOS:         goruntime.GOOS,
-				kubeletapis.LabelArch:     goruntime.GOARCH,
+				kubeletapis.LabelArch:       goruntime.GOARCH,
+				kubeletapis.LegacyLabelOS:   goruntime.GOOS,
+				kubeletapis.LegacyLabelArch: goruntime.GOARCH,
 			},
 		},
 		Spec: v1.NodeSpec{

pkg/kubelet/kubelet_node_status_test.go

@@ -1046,9 +1046,11 @@ func TestRegisterWithApiServer(t *testing.T) {
 			ObjectMeta: metav1.ObjectMeta{
 				Name: testKubeletHostname,
 				Labels: map[string]string{
-					kubeletapis.LabelHostname: testKubeletHostname,
+					kubeletapis.LabelHostname:   testKubeletHostname,
-					kubeletapis.LabelOS:       goruntime.GOOS,
+					kubeletapis.LabelOS:         goruntime.GOOS,
-					kubeletapis.LabelArch:     goruntime.GOARCH,
+					kubeletapis.LabelArch:       goruntime.GOARCH,
+					kubeletapis.LegacyLabelOS:   goruntime.GOOS,
+					kubeletapis.LegacyLabelArch: goruntime.GOARCH,
 				},
 			},
 		}, nil
@@ -1091,9 +1093,11 @@ func TestTryRegisterWithApiServer(t *testing.T) {
 		node := &v1.Node{
 			ObjectMeta: metav1.ObjectMeta{
 				Labels: map[string]string{
-					kubeletapis.LabelHostname: testKubeletHostname,
+					kubeletapis.LabelHostname:   testKubeletHostname,
-					kubeletapis.LabelOS:       goruntime.GOOS,
+					kubeletapis.LabelOS:         goruntime.GOOS,
-					kubeletapis.LabelArch:     goruntime.GOARCH,
+					kubeletapis.LabelArch:       goruntime.GOARCH,
+					kubeletapis.LegacyLabelOS:   goruntime.GOOS,
+					kubeletapis.LegacyLabelArch: goruntime.GOARCH,
 				},
 			},
 		}