Enable automated Prune via CRD NodeFeatureDiscoveries

api/v1/nodefeaturediscovery_types.go

@@ -63,6 +63,13 @@ type NodeFeatureDiscoverySpec struct {
 	// worker.
 	// +optional
 	WorkerConfig ConfigMap `json:"workerConfig"`
+
+	// PruneOnDelete defines whether the NFD-master prune should be
+	// enabled or not. If enabled, the Operator will deploy an NFD-Master prune
+	// job that will remove all NFD labels (and other NFD-managed assets such
+	// as annotations, extended resources and taints) from the cluster nodes.
+	// +optional
+	PruneOnDelete bool `json:"prunerOnDelete"`
 }
 
 // OperandSpec describes configuration options for the operand

build/assets/prune/0100_service_account.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: nfd-prune

build/assets/prune/0200_clusterrole.yaml

@@ -0,0 +1,14 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: nfd-prune
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - nodes
+  verbs:
+  - get
+  - patch
+  - update
+  - list

build/assets/prune/0300_clusterole_binding.yaml

@@ -0,0 +1,13 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: nfd-prune
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: nfd-prune
+subjects:
+- kind: ServiceAccount
+  name: nfd-prune
+  namespace: node-feature-discovery-operator
+

build/assets/prune/0400_prune_job.yaml

@@ -0,0 +1,61 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  labels:
+    app: nfd
+  name: nfd-prune
+spec:
+  completions: 1
+  template:
+    metadata:
+      labels:
+        app: nfd-prune
+    spec:
+      affinity:
+        nodeAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - preference:
+              matchExpressions:
+              - key: node-role.kubernetes.io/master
+                operator: In
+                values:
+                - ""
+            weight: 1
+          - preference:
+              matchExpressions:
+              - key: node-role.kubernetes.io/control-plane
+                operator: In
+                values:
+                - ""
+            weight: 1
+      containers:
+      - args:
+        - -prune
+        command:
+        - nfd-master
+        env:
+        - name: NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        image: $(NODE_FEATURE_DISCOVERY_IMAGE)
+        imagePullPolicy: Always
+        name: nfd-master
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop:
+            - ALL
+          readOnlyRootFilesystem: true
+          runAsNonRoot: true
+      restartPolicy: Never
+      serviceAccount: nfd-master
+      tolerations:
+      - effect: NoSchedule
+        key: node-role.kubernetes.io/master
+        operator: Equal
+        value: ""
+      - effect: NoSchedule
+        key: node-role.kubernetes.io/control-plane
+        operator: Equal
+        value: ""

config/crd/bases/nfd.kubernetes.io_nodefeaturediscoveries.yaml

@@ -4,6 +4,7 @@ kind: CustomResourceDefinition
 metadata:
   annotations:
     controller-gen.kubebuilder.io/version: v0.8.0
+    api-approved.kubernetes.io: unapproved, experimental-only
   creationTimestamp: null
   name: nodefeaturediscoveries.nfd.kubernetes.io
 spec:
@@ -71,6 +72,13 @@ spec:
                       listens for incoming requests.
                     type: integer
                 type: object
+              prunerOnDelete:
+                description: PruneOnDelete defines whether the NFD-master prune should
+                  be enabled or not. If enabled, the Operator will deploy an NFD-Master
+                  prune job that will remove all NFD labels (and other NFD-managed
+                  assets such as annotations, extended resources and taints) from
+                  the cluster nodes.
+                type: boolean
               resourceLabels:
                 description: ResourceLabels defines the list of features to be advertised
                   as extended resources instead of labels.

controllers/nodefeaturediscovery_controls.go

@@ -22,6 +22,7 @@ import (
 	"strings"
 
 	appsv1 "k8s.io/api/apps/v1"
+	batchv1 "k8s.io/api/batch/v1"
 	corev1 "k8s.io/api/core/v1"
 	rbacv1 "k8s.io/api/rbac/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
@@ -528,6 +529,67 @@ func Deployment(n NFD) (ResourceStatus, error) {
 	return Ready, nil
 }
 
+// Job checks the readiness of a Job and creates one if it doesn't exist
+func Job(n NFD) (ResourceStatus, error) {
+	// state represents the resource's 'control' function index
+	state := n.idx
+
+	// It is assumed that the index has already been verified to be a
+	// Job object, so let's get the resource's Job object
+	obj := n.resources[state].Job
+
+	// Update the NFD operand image
+	obj.Spec.Template.Spec.Containers[0].Image = n.ins.Spec.Operand.ImagePath()
+
+	// Update the image pull policy
+	if n.ins.Spec.Operand.ImagePullPolicy != "" {
+		obj.Spec.Template.Spec.Containers[0].ImagePullPolicy = n.ins.Spec.Operand.ImagePolicy(n.ins.Spec.Operand.ImagePullPolicy)
+	}
+
+	// Set namespace based on the NFD namespace. (And again,
+	// it is assumed that the Namespace has already been
+	// determined before this function was called.)
+	obj.SetNamespace(n.ins.GetNamespace())
+
+	// found states if the Job was found
+	found := &batchv1.Job{}
+
+	klog.InfoS("Looking for Job", "name", obj.Name, "namespace", obj.Namespace)
+
+	// SetControllerReference sets the owner as a Controller OwnerReference
+	// and is used for garbage collection of the controlled object. It is
+	// also used to reconcile the owner object on changes to the controlled
+	// object. If we cannot set the owner, then return NotReady
+	if err := controllerutil.SetControllerReference(n.ins, &obj, n.rec.Scheme); err != nil {
+		return NotReady, err
+	}
+
+	// Look for the Job to see if it exists, and if so, check if it's
+	// Ready/NotReady. If the Job does not exist, then attempt to
+	// create it
+	err := n.rec.Client.Get(context.TODO(), types.NamespacedName{Namespace: obj.Namespace, Name: obj.Name}, found)
+	if err != nil && errors.IsNotFound(err) {
+		klog.InfoS("Job not found, creating", "name", obj.Name, "namespace", obj.Namespace)
+		err = n.rec.Client.Create(context.TODO(), &obj)
+		if err != nil {
+			klog.ErrorS(err, "Couldn't create Job", "name", obj.Name, "namespace", obj.Namespace)
+			return NotReady, err
+		}
+		return Ready, nil
+	} else if err != nil {
+		return NotReady, err
+	}
+
+	// If we found the Job, and is Ready, then we're done
+	if found.Status.Active > 0 {
+		return NotReady, nil
+	} else if found.Status.Failed > 0 {
+		return NotReady, fmt.Errorf("prune Job failed")
+	}
+
+	return Ready, nil
+}
+
 // Service checks if a Service exists and creates one if it doesn't exist
 func Service(n NFD) (ResourceStatus, error) {
 	// state represents the resource's 'control' function index

controllers/nodefeaturediscovery_finalizers.go

@@ -49,6 +49,16 @@ func (r *NodeFeatureDiscoveryReconciler) finalizeNFDOperand(ctx context.Context,
 		return ctrl.Result{RequeueAfter: 10 * time.Second}, nil
 	}
 
+	if instance.Spec.PruneOnDelete {
+		klog.Info("Deleting NFD labels and NodeFeature CRs from cluster")
+		if err := deployPrune(ctx, r, instance); err != nil {
+			klog.Error(err, "Failed to delete NFD labels and NodeFeature CRs from cluster")
+			return ctrl.Result{}, err
+		}
+	} else {
+		klog.Warning("PruneOnDelete is disabled, NFD labels and NodeFeature CRs will not be deleted from cluster")
+	}
+
 	// If all components are deleted, then remove the finalizer
 	klog.Info("Secondary check passed. Removing finalizer if it exists.")
 	if r.hasFinalizer(instance, finalizer) {
@@ -363,6 +373,100 @@ func (r *NodeFeatureDiscoveryReconciler) doComponentsExist(ctx context.Context,
 	return false
 }
 
+// deployPrune deploys nfd-master with --prune option
+// to remove labels and NodeFeature CRs
+func deployPrune(ctx context.Context, r *NodeFeatureDiscoveryReconciler, instance *nfdv1.NodeFeatureDiscovery) error {
+	res, ctrl := addResourcesControls("/opt/nfd/prune")
+	n := NFD{
+		rec: r,
+		ins: instance,
+		idx: 0,
+	}
+
+	n.controls = append(n.controls, ctrl)
+	n.resources = append(n.resources, res)
+
+	// Run through all control functions, return an error on any NotReady resource.
+	for {
+		err := n.step()
+		if err != nil {
+			return err
+		}
+		if n.last() {
+			break
+		}
+	}
+
+	// wait until job is finished and then delete it
+	err := wait.Poll(RetryInterval, time.Minute*3, func() (done bool, err error) {
+		job, err := r.getJob(ctx, instance.ObjectMeta.Namespace, nfdPruneApp)
+		if err != nil {
+			return false, err
+		}
+		if job.Status.Succeeded > 0 {
+			return true, nil
+		}
+		return false, nil
+	})
+	if err != nil {
+		return err
+	}
+
+	// delete job and RBAC objects
+	// Attempt to delete the Job
+	err = wait.Poll(RetryInterval, Timeout, func() (done bool, err error) {
+		err = r.deleteJob(ctx, instance.ObjectMeta.Namespace, nfdPruneApp)
+		if err != nil {
+			return false, interpretError(err, "Prune Job")
+		}
+		klog.Info("nfd-prune Job resource has been deleted.")
+		return true, nil
+	})
+	if err != nil {
+		return err
+	}
+	// Attempt to delete the ServiceAccount
+	err = wait.Poll(RetryInterval, Timeout, func() (done bool, err error) {
+		err = r.deleteServiceAccount(ctx, instance.ObjectMeta.Namespace, nfdPruneApp)
+		if err != nil {
+			return false, interpretError(err, "Prune ServiceAccount")
+		}
+		klog.Info("nfd-prune ServiceAccount resource has been deleted.")
+		return true, nil
+	})
+	if err != nil {
+		return err
+	}
+
+	// Attempt to delete the ClusterRole
+	err = wait.Poll(RetryInterval, Timeout, func() (done bool, err error) {
+		err = r.deleteClusterRole(ctx, instance.ObjectMeta.Namespace, nfdPruneApp)
+		if err != nil {
+			return false, interpretError(err, "Prune ClusterRole")
+		}
+		klog.Info("nfd-prune ClusterRole resource has been deleted.")
+		return true, nil
+	})
+	if err != nil {
+		return err
+	}
+
+	// Attempt to delete the ClusterRoleBinding
+	err = wait.Poll(RetryInterval, Timeout, func() (done bool, err error) {
+		err = r.deleteClusterRoleBinding(ctx, instance.ObjectMeta.Namespace, nfdPruneApp)
+		if err != nil {
+			return false, interpretError(err, "Prune ClusterRoleBinding")
+		}
+		klog.Info("nfd-prune ClusterRoleBinding resource has been deleted.")
+		return true, nil
+	})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // interpretError determines if a resource has already been
 // (successfully) deleted
 func interpretError(err error, resourceName string) error {

controllers/nodefeaturediscovery_resources.go

@@ -24,6 +24,7 @@ import (
 	"strings"
 
 	appsv1 "k8s.io/api/apps/v1"
+	batchv1 "k8s.io/api/batch/v1"
 	corev1 "k8s.io/api/core/v1"
 	rbacv1 "k8s.io/api/rbac/v1"
 	k8serrors "k8s.io/apimachinery/pkg/api/errors"
@@ -46,6 +47,7 @@ type Resources struct {
 	ClusterRoleBinding rbacv1.ClusterRoleBinding
 	ConfigMap          corev1.ConfigMap
 	DaemonSet          appsv1.DaemonSet
+	Job                batchv1.Job
 	Deployment         appsv1.Deployment
 	Pod                corev1.Pod
 	Service            corev1.Service
@@ -143,6 +145,10 @@ func addResourcesControls(path string) (Resources, controlFunc) {
 			_, _, err := s.Decode(m, nil, &res.Deployment)
 			panicIfError(err)
 			ctrl = append(ctrl, Deployment)
+		case "Job":
+			_, _, err := s.Decode(m, nil, &res.Job)
+			panicIfError(err)
+			ctrl = append(ctrl, Job)
 		case "Service":
 			_, _, err := s.Decode(m, nil, &res.Service)
 			panicIfError(err)
@@ -184,6 +190,13 @@ func (r *NodeFeatureDiscoveryReconciler) getDeployment(ctx context.Context, name
 	return d, err
 }
 
+// getJob gets one of the NFD Operand's Job
+func (r *NodeFeatureDiscoveryReconciler) getJob(ctx context.Context, namespace string, name string) (*batchv1.Job, error) {
+	j := &batchv1.Job{}
+	err := r.Get(ctx, client.ObjectKey{Namespace: namespace, Name: name}, j)
+	return j, err
+}
+
 // getConfigMap gets one of the NFD Operand's ConfigMap
 func (r *NodeFeatureDiscoveryReconciler) getConfigMap(ctx context.Context, namespace string, name string) (*corev1.ConfigMap, error) {
 	cm := &corev1.ConfigMap{}
@@ -290,6 +303,22 @@ func (r *NodeFeatureDiscoveryReconciler) deleteDeployment(ctx context.Context, n
 	return r.Delete(context.TODO(), d)
 }
 
+// deleteJob deletes Operand job
+func (r *NodeFeatureDiscoveryReconciler) deleteJob(ctx context.Context, namespace string, name string) error {
+	j, err := r.getJob(ctx, namespace, name)
+
+	// Do not return an error if the object has already been deleted
+	if k8serrors.IsNotFound(err) {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	return r.Delete(context.TODO(), j)
+}
+
 // deleteService deletes the NFD Operand's Service
 func (r *NodeFeatureDiscoveryReconciler) deleteService(ctx context.Context, namespace string, name string) error {
 	svc, err := r.getService(ctx, namespace, name)

controllers/nodefeaturediscovery_status.go

@@ -33,6 +33,7 @@ const (
 	nfdWorkerApp          string = "nfd-worker"
 	nfdMasterApp          string = "nfd-master"
 	nfdTopologyUpdaterApp string = "nfd-topology-updater"
+	nfdPruneApp           string = "nfd-prune"
 )
 
 const (