nfd-master: rename -featurerules-controller flag to -crd-controller

Deprecate the '-featurerules-controller' command line flag as the name
does not describe the functionality anymore: in practice it controls the
CRD controller handling both NodeFeature and NodeFeatureRule objects.
The patch introduces a duplicate, more generally named, flag
'-crd-controller'. A warning is printed in the log if
'-featurerules-controller' flag is encountered.

cmd/nfd-master/main.go

@@ -50,6 +50,14 @@ func main() {
 		os.Exit(2)
 	}
 
+	// Check deprecated flags
+	flags.Visit(func(f *flag.Flag) {
+		switch f.Name {
+		case "featurerules-controller":
+			klog.Warningf("-featurerules-controller is deprecated, use '-crd-controller' flag instead")
+		}
+	})
+
 	if *printVersion {
 		fmt.Println(ProgramName, version.Get())
 		os.Exit(0)
@@ -100,8 +108,10 @@ func initFlags(flagset *flag.FlagSet) *master.Args {
 		"Do not publish feature labels")
 	flagset.BoolVar(&args.EnableTaints, "enable-taints", false,
 		"Enable node tainting feature")
-	flagset.BoolVar(&args.FeatureRulesController, "featurerules-controller", true,
-		"Enable controller for NodeFeatureRule objects. Generates node labels based on the rules in these CRs.")
+	flagset.BoolVar(&args.CrdController, "featurerules-controller", true,
+		"Enable NFD CRD API controller. DEPRECATED: use -crd-controller instead")
+	flagset.BoolVar(&args.CrdController, "crd-controller", true,
+		"Enable NFD CRD API controller for processing NodeFeature and NodeFeatureRule objects.")
 	flagset.IntVar(&args.Port, "port", 8080,
 		"Port on which to listen for connections.")
 	flagset.BoolVar(&args.Prune, "prune", false,

deployment/helm/node-feature-discovery/templates/master.yaml

@@ -87,11 +87,14 @@ spec:
             {{- if .Values.master.resourceLabels | empty | not }}
             - "--resource-labels={{- join "," .Values.master.resourceLabels }}"
             {{- end }}
+            {{- if .Values.master.crdController | kindIs "invalid" | not }}
+            - "-crd-controller={{ .Values.master.crdController }}"
+            {{- else }}
+            ## By default, disable crd controller for other than the default instances
+            - "-featurerules-controller={{ .Values.master.instance | empty }}"
+            {{- end }}
             {{- if .Values.master.featureRulesController | kindIs "invalid" | not }}
             - "-featurerules-controller={{ .Values.master.featureRulesController }}"
-            {{- else }}
-            ## By default, disable NodeFeatureRules controller for other than the default instances
-            - "-featurerules-controller={{ .Values.master.instance | empty }}"
             {{- end }}
     {{- if .Values.tls.enable }}
             - "--ca-file=/etc/kubernetes/node-feature-discovery/certs/ca.crt"

deployment/helm/node-feature-discovery/values.yaml

@@ -17,6 +17,7 @@ master:
   featureApi:
   extraLabelNs: []
   resourceLabels: []
+  crdController: null
   featureRulesController: null
   deploymentAnnotations: {}
   replicaCount: 1

docs/deployment/helm.md

@@ -107,7 +107,8 @@ We have introduced the following Chart parameters.
 | `master.instance`           | string  |                                         | Instance name. Used to separate annotation namespaces for multiple parallel deployments                                                  |
 | `master.extraLabelNs`       | array   | []                                      | List of allowed extra label namespaces                                                                                                   |
 | `master.resourceLabels`     | array   | []                                      | List of labels to be registered as extended resources                                                                                          |
-| `master.featureRulesController` | bool | null                                   | Specifies whether the controller for processing of NodeFeatureRule objects is enabled. If not set, controller will be enabled if `master.instance` is empty. |
+| `master.crdController`      | bool    | null                                    | Specifies whether the NFD CRD API controller is enabled. If not set, controller will be enabled if `master.instance` is empty. |
+| `master.featureRulesController` | bool | null                                   | DEPRECATED: use `master.crdController` instead |
 | `master.replicaCount`       | integer | 1                                       | Number of desired pods. This is a pointer to distinguish between explicit zero and not specified                                         |
 | `master.podSecurityContext` | dict    | {}                                      | [PodSecurityContext](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-pod) holds pod-level security attributes and common container settings |
 | `master.securityContext`    | dict    | {}                                      | Container [security settings](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container)|

docs/reference/master-commandline-reference.md

@@ -177,20 +177,24 @@ Example:
 nfd-master -no-publish
 ```
 
-### -featurerules-controller
+### -crd-controller
 
-The `-featurerules-controller` flag controlers the processing of
-NodeFeatureRule objects, effectively enabling/disabling labels from these
-custom labeling rules.
+The `-crd-controller` flag specifies whether the NFD CRD API controller is
+enabled or not. The controller is responsible for processing NodeFeature and
+NodeFeatureRule objects.
 
 Default: *true*
 
 Example:
 
 ```bash
-nfd-master -featurerules-controller=false
+nfd-master -crd-controller=false
 ```
 
+### -featurerules-controller
+
+**DEPRECATED**: use [`-crd-controller`](#-crd-controller) instead.
+
 ### -label-whitelist
 
 The `-label-whitelist` specifies a regular expression for filtering feature

pkg/nfd-master/nfd-master.go

@@ -62,21 +62,21 @@ type Annotations map[string]string
 
 // Args holds command line arguments
 type Args struct {
-	CaFile                 string
-	CertFile               string
-	ExtraLabelNs           utils.StringSetVal
-	Instance               string
-	KeyFile                string
-	Kubeconfig             string
-	LabelWhiteList         utils.RegexpVal
-	FeatureRulesController bool
-	EnableNodeFeatureApi   bool
-	NoPublish              bool
-	EnableTaints           bool
-	Port                   int
-	Prune                  bool
-	VerifyNodeName         bool
-	ResourceLabels         utils.StringSetVal
+	CaFile               string
+	CertFile             string
+	ExtraLabelNs         utils.StringSetVal
+	Instance             string
+	KeyFile              string
+	Kubeconfig           string
+	LabelWhiteList       utils.RegexpVal
+	CrdController        bool
+	EnableNodeFeatureApi bool
+	NoPublish            bool
+	EnableTaints         bool
+	Port                 int
+	Prune                bool
+	VerifyNodeName       bool
+	ResourceLabels       utils.StringSetVal
 }
 
 type NfdMaster interface {
@@ -154,7 +154,7 @@ func (m *nfdMaster) Run() error {
 		return m.prune()
 	}
 
-	if m.args.FeatureRulesController {
+	if m.args.CrdController {
 		kubeconfig, err := m.getKubeconfig()
 		if err != nil {
 			return err