Fixing handling ImageRepoSecret in worker pod

Since moving to using container-runtime and init-container for pull kernel module
container image, we need to set the ImageRepoSecret(if defined) in the
worker Pod and also there is no need for mapping ImageRepoSecret and
secrets of the SA into worker pod volumes (was need for crane)
This PR does the following:
1) set ImageRepoSecret into the worker Pod, if defined in the KMM Module
2) remove creating volumes for SA's secret and ImaRepo secret in the
   worker pod
3) remove pullSecretHelper interface implementation as not needed
4) uni-test updates

internal/controllers/nmc_reconciler.go

@@ -28,7 +28,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/kubectl/pkg/cmd/util/podcmd"
-	"k8s.io/utils/ptr"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/builder"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -749,7 +748,6 @@ type podManager interface {
 
 type podManagerImpl struct {
 	client      client.Client
-	psh         pullSecretHelper
 	scheme      *runtime.Scheme
 	workerCfg   *config.Worker
 	workerImage string
@@ -758,7 +756,6 @@ type podManagerImpl struct {
 func newPodManager(client client.Client, workerImage string, scheme *runtime.Scheme, workerCfg *config.Worker) podManager {
 	return &podManagerImpl{
 		client:      client,
-		psh:         &pullSecretHelperImpl{client: client},
 		scheme:      scheme,
 		workerCfg:   workerCfg,
 		workerImage: workerImage,
@@ -982,11 +979,6 @@ func (p *podManagerImpl) baseWorkerPod(ctx context.Context, nmc client.Object, i
 
 	hostPathDirectory := v1.HostPathDirectory
 
-	psv, psvm, err := p.psh.VolumesAndVolumeMounts(ctx, item)
-	if err != nil {
-		return nil, fmt.Errorf("could not list pull secrets for worker Pod: %v", err)
-	}
-
 	volumes := []v1.Volume{
 		{
 			Name: volumeNameConfig,
@@ -1052,6 +1044,11 @@ func (p *podManagerImpl) baseWorkerPod(ctx context.Context, nmc client.Object, i
 		},
 	}
 
+	var imagePullSecrets []v1.LocalObjectReference
+	if item.ImageRepoSecret != nil {
+		imagePullSecrets = append(imagePullSecrets, *item.ImageRepoSecret)
+	}
+
 	nodeName := nmc.GetName()
 	pod := v1.Pod{
 		ObjectMeta: metav1.ObjectMeta{
@@ -1088,7 +1085,7 @@ func (p *podManagerImpl) baseWorkerPod(ctx context.Context, nmc client.Object, i
 				{
 					Name:         workerContainerName,
 					Image:        p.workerImage,
-					VolumeMounts: append(volumeMounts, psvm...),
+					VolumeMounts: volumeMounts,
 					Resources: v1.ResourceRequirements{
 						Requests: requests,
 						Limits:   limits,
@@ -1098,17 +1095,18 @@ func (p *podManagerImpl) baseWorkerPod(ctx context.Context, nmc client.Object, i
 			NodeName:           nodeName,
 			RestartPolicy:      v1.RestartPolicyOnFailure,
 			ServiceAccountName: item.ServiceAccountName,
-			Volumes:            append(volumes, psv...),
+			ImagePullSecrets:   imagePullSecrets,
+			Volumes:            volumes,
 		},
 	}
 
-	if err = ctrl.SetControllerReference(nmc, &pod, p.scheme); err != nil {
+	if err := ctrl.SetControllerReference(nmc, &pod, p.scheme); err != nil {
 		return nil, fmt.Errorf("could not set the owner as controller: %v", err)
 	}
 
 	kmodsPathContainerImg := filepath.Join(moduleConfig.Modprobe.DirName, "lib", "modules", moduleConfig.KernelVersion)
 	kmodsPathWorkerImg := filepath.Join(sharedFilesDir, moduleConfig.Modprobe.DirName, "lib", "modules")
-	if err = addCopyCommand(&pod, kmodsPathContainerImg, kmodsPathWorkerImg); err != nil {
+	if err := addCopyCommand(&pod, kmodsPathContainerImg, kmodsPathWorkerImg); err != nil {
 		return nil, fmt.Errorf("could not add the copy command to the init container: %v", err)
 	}
 
@@ -1260,97 +1258,3 @@ func getModulesOrderAnnotationValue(modulesNames []string) string {
 	}
 	return softDepData.String()
 }
-
-//go:generate mockgen -source=nmc_reconciler.go -package=controllers -destination=mock_nmc_reconciler.go pullSecretHelper
-
-type pullSecretHelper interface {
-	VolumesAndVolumeMounts(ctx context.Context, nms *kmmv1beta1.ModuleItem) ([]v1.Volume, []v1.VolumeMount, error)
-}
-
-type pullSecretHelperImpl struct {
-	client client.Client
-}
-
-func (p *pullSecretHelperImpl) VolumesAndVolumeMounts(ctx context.Context, item *kmmv1beta1.ModuleItem) ([]v1.Volume, []v1.VolumeMount, error) {
-	logger := ctrl.LoggerFrom(ctx)
-
-	secretNames := sets.New[string]()
-
-	type pullSecret struct {
-		secretName string
-		volumeName string
-		optional   bool
-	}
-
-	pullSecrets := make([]pullSecret, 0)
-
-	if irs := item.ImageRepoSecret; irs != nil {
-		secretNames.Insert(irs.Name)
-
-		ps := pullSecret{
-			secretName: irs.Name,
-			volumeName: volNameImageRepoSecret,
-		}
-
-		pullSecrets = append(pullSecrets, ps)
-	}
-
-	if san := item.ServiceAccountName; san != "" {
-		sa := v1.ServiceAccount{}
-		nsn := types.NamespacedName{Namespace: item.Namespace, Name: san}
-
-		logger.V(1).Info("Getting service account", "name", nsn)
-
-		if err := p.client.Get(ctx, nsn, &sa); err != nil {
-			return nil, nil, fmt.Errorf("could not get ServiceAccount %s: %v", nsn, err)
-		}
-
-		for _, s := range sa.ImagePullSecrets {
-			if secretNames.Has(s.Name) {
-				continue
-			}
-
-			secretNames.Insert(s.Name)
-
-			hashValue, err := hashstructure.Hash(s.Name, hashstructure.FormatV2, nil)
-			if err != nil {
-				return nil, nil, fmt.Errorf("failed to hash secret %s: %v", s.Name, err)
-			}
-
-			ps := pullSecret{
-				secretName: s.Name,
-				volumeName: fmt.Sprintf("pull-secret-%d", hashValue),
-				optional:   true, // to match the node's container runtime behaviour
-			}
-
-			pullSecrets = append(pullSecrets, ps)
-		}
-	}
-
-	volumes := make([]v1.Volume, 0, len(pullSecrets))
-	volumeMounts := make([]v1.VolumeMount, 0, len(pullSecrets))
-
-	for _, s := range pullSecrets {
-		v := v1.Volume{
-			Name: s.volumeName,
-			VolumeSource: v1.VolumeSource{
-				Secret: &v1.SecretVolumeSource{
-					SecretName: s.secretName,
-					Optional:   ptr.To(s.optional),
-				},
-			},
-		}
-
-		volumes = append(volumes, v)
-
-		vm := v1.VolumeMount{
-			Name:      s.volumeName,
-			ReadOnly:  true,
-			MountPath: filepath.Join(worker.PullSecretsDir, s.secretName),
-		}
-
-		volumeMounts = append(volumeMounts, vm)
-	}
-
-	return volumes, volumeMounts, nil
-}