nfd-master: allow profile.node.kubernetes.io label ns

Add a separate label namespace for profile labels, intended for
user-specified higher level "meta features". Also sub-namespaces of this
(i.e. <sub-ns>.profile.node.kubernetes.io) are allowed.

docs/advanced/master-commandline-reference.md

@@ -175,8 +175,9 @@ nfd-master -label-whitelist='.*cpuid\.'
 
 The `-extra-label-ns` flag specifies a comma-separated list of allowed feature
 label namespaces. By default, nfd-master only allows creating labels in the
-default `feature.node.kubernetes.io` label namespace and its sub-namespaces
-(e.g. `vendor.feature.node.kubernetes.io`). This option can be used to allow
+default `feature.node.kubernetes.io` and `profile.node.kubernetes.io` label
+namespaces and their sub-namespaces (e.g. `vendor.feature.node.kubernetes.io`
+and `sub.ns.profile.node.kubernetes.io`). This option can be used to allow
 other vendor or application specific namespaces for custom labels from the
 local and custom feature sources.
 

docs/get-started/features.md

@@ -31,8 +31,9 @@ The published node labels encode a few pieces of information:
   - all built-in labels use `feature.node.kubernetes.io`
   - user-specified custom labels ([custom](#custom) and
     [local](#local--user-specific-features) feature sources)
-    - `feature.node.kubernetes.io` and its sub-namespaces (e.g.
-      `vendor.profile.node.kubernetes.io`) are allowed by default
+    - `feature.node.kubernetes.io` and `profile.node.kubernetes.io` plus their
+      sub-namespaces (e.g. `vendor.profile.node.kubernetes.io` and
+      `sub.ns.profile.node.kubernetes.io`) are allowed by default
     - additional namespaces may be enabled with the
       [`--extra-label-ns`](../advanced/master-commandline-reference#-extra-label-ns)
       command line flag of nfd-master
@@ -376,7 +377,7 @@ custom:
     matchOn:
       - kConfig: ["GCC_VERSION=100101"]
         loadedKMod: ["kmod1"]
-  - name: "my.datacenter"
+  - name: "profile.node.kubernetes.io/my-datacenter"
     value: "datacenter-1"
     matchOn:
       - nodename: [ "node-datacenter1-rack.*-server.*" ]
@@ -413,7 +414,7 @@ __In the example above:__
   in-tree `kmod1` kernel module is loaded __AND__ it's built with
   `GCC_VERSION=100101`.
 - A node would contain the label:
-  `feature.node.kubernetes.io/my.datacenter=datacenter-1` if the node's name
+  `profile.node.kubernetes.io/my-datacenter=datacenter-1` if the node's name
   matches the `node-datacenter1-rack.*-server.*` pattern, e.g.
   `node-datacenter1-rack2-server42`
 
@@ -577,7 +578,8 @@ e.g. for overriding labels created by other feature sources.
 
 You can also override the default namespace of your labels using this format:
 `<namespace>/<name>[=<value>]`. If using something else than
-`[<sub-ns>.]feature.node.kubernetes.io`, you must whitelist your namespace
+`[<sub-ns>.]feature.node.kubernetes.io` or
+`[<sub-ns>.]profile.node.kubernetes.io`, you must whitelist your namespace
 using the `-extra-label-ns` option on the master.
 In this case, the name of the
 file will not be added to the label name. For example, if you want to add the

pkg/nfd-master/nfd-master-internal_test.go

@@ -63,7 +63,11 @@ func newMockMaster(apihelper apihelper.APIHelpers) *nfdMaster {
 
 func TestUpdateNodeFeatures(t *testing.T) {
 	Convey("When I update the node using fake client", t, func() {
-		fakeFeatureLabels := map[string]string{FeatureLabelNs + "/source-feature.1": "1", FeatureLabelNs + "/source-feature.2": "2", FeatureLabelNs + "/source-feature.3": "val3"}
+		fakeFeatureLabels := map[string]string{
+			FeatureLabelNs + "/source-feature.1": "1",
+			FeatureLabelNs + "/source-feature.2": "2",
+			FeatureLabelNs + "/source-feature.3": "val3",
+			ProfileLabelNs + "/profile-a":        "val4"}
 		fakeAnnotations := map[string]string{"my-annotation": "my-val"}
 		fakeExtResources := ExtendedResources{FeatureLabelNs + "/source-feature.1": "1", FeatureLabelNs + "/source-feature.2": "2"}
 
@@ -354,18 +358,23 @@ func TestSetLabels(t *testing.T) {
 		Convey("When --extra-label-ns and --instance are specified", func() {
 			// In the gRPC request the label names may omit the default ns
 			instance := "foo"
-			vendorLabel := "vendor." + FeatureLabelNs + "/feature-4"
+			vendorFeatureLabel := "vendor." + FeatureLabelNs + "/feature-4"
+			vendorProfileLabel := "vendor." + ProfileLabelNs + "/feature-5"
 			mockLabels := map[string]string{"feature-1": "val-1",
 				"valid.ns/feature-2":   "val-2",
 				"invalid.ns/feature-3": "val-3",
-				vendorLabel:            " val-4"}
+				vendorFeatureLabel:     " val-4",
+				vendorProfileLabel:     " val-5"}
 			expectedPatches := []apihelper.JsonPatch{
 				apihelper.NewJsonPatch("add", "/metadata/annotations", instance+"."+wvAnnotation, workerVer),
-				apihelper.NewJsonPatch("add", "/metadata/annotations", instance+"."+flAnnotation, "feature-1,valid.ns/feature-2,"+vendorLabel),
+				apihelper.NewJsonPatch("add", "/metadata/annotations",
+					instance+"."+flAnnotation,
+					"feature-1,valid.ns/feature-2,"+vendorFeatureLabel+","+vendorProfileLabel),
 				apihelper.NewJsonPatch("add", "/metadata/annotations", instance+"."+erAnnotation, ""),
 				apihelper.NewJsonPatch("add", "/metadata/labels", FeatureLabelNs+"/feature-1", mockLabels["feature-1"]),
 				apihelper.NewJsonPatch("add", "/metadata/labels", "valid.ns/feature-2", mockLabels["valid.ns/feature-2"]),
-				apihelper.NewJsonPatch("add", "/metadata/labels", vendorLabel, mockLabels[vendorLabel]),
+				apihelper.NewJsonPatch("add", "/metadata/labels", vendorFeatureLabel, mockLabels[vendorFeatureLabel]),
+				apihelper.NewJsonPatch("add", "/metadata/labels", vendorProfileLabel, mockLabels[vendorProfileLabel]),
 			}
 
 			mockMaster.args.ExtraLabelNs = map[string]struct{}{"valid.ns": {}}

pkg/nfd-master/nfd-master.go

@@ -49,6 +49,12 @@ const (
 	// FeatureLabelSubNsSuffix is the suffix for allowed feature label sub-namespaces
 	FeatureLabelSubNsSuffix = "." + FeatureLabelNs
 
+	// ProfileLabelNs is the namespace for profile labels
+	ProfileLabelNs = "profile.node.kubernetes.io"
+
+	// ProfileLabelSubNsSuffix is the suffix for allowed profile label sub-namespaces
+	ProfileLabelSubNsSuffix = "." + ProfileLabelNs
+
 	// AnnotationNsBase namespace for all NFD-related annotations
 	AnnotationNsBase = "nfd.node.kubernetes.io"
 
@@ -317,7 +323,8 @@ func filterFeatureLabels(labels Labels, extraLabelNs map[string]struct{}, labelW
 		ns, name := splitNs(label)
 
 		// Check label namespace, filter out if ns is not whitelisted
-		if ns != FeatureLabelNs && !strings.HasSuffix(ns, FeatureLabelSubNsSuffix) {
+		if ns != FeatureLabelNs && ns != ProfileLabelNs &&
+			!strings.HasSuffix(ns, FeatureLabelSubNsSuffix) && !strings.HasSuffix(ns, ProfileLabelSubNsSuffix) {
 			if _, ok := extraLabelNs[ns]; !ok {
 				klog.Errorf("Namespace %q is not allowed. Ignoring label %q\n", ns, label)
 				continue