only use the applicationsNamespace in openshift

the codeflare operator checks for kuberay namespaces to apply
network policies so it uses opendatahub DSCInitialization CRD
which isn't available on vanilla k8s clusters so added a condition
to check for DSCInitialization only when running on openshift

This fixes the gatejobs running the codeflare-sdk repo as the e2e
test jobs are failing because DSCInitialization isn't available on
kind cluster that is being used for testing.

Author: szaher

pkg/controllers/raycluster_controller.go

@@ -269,18 +269,21 @@ func (r *RayClusterReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 	// Locate the KubeRay operator deployment:
 	// - First try to get the ODH / RHOAI application namespace from the DSCInitialization
 	// - Or fallback to the well-known defaults
+	// add check if running on openshift or vanilla kubernetes
 	var kubeRayNamespaces []string
-	dsci := &dsciv1.DSCInitialization{}
-	err := r.Client.Get(ctx, client.ObjectKey{Name: "default-dsci"}, dsci)
-	if errors.IsNotFound(err) {
-		kubeRayNamespaces = []string{"opendatahub", "redhat-ods-applications"}
-	} else if err != nil {
-		return ctrl.Result{}, err
-	} else {
-		kubeRayNamespaces = []string{dsci.Spec.ApplicationsNamespace}
+	kubeRayNamespaces = []string{"opendatahub", "redhat-ods-applications"}
+
+	if r.IsOpenShift {
+		dsci := &dsciv1.DSCInitialization{}
+		err := r.Client.Get(ctx, client.ObjectKey{Name: "default-dsci"}, dsci)
+		if err != nil {
+			return ctrl.Result{}, err
+		} else {
+			kubeRayNamespaces = []string{dsci.Spec.ApplicationsNamespace}
+		}
 	}
 
-	_, err = r.kubeClient.NetworkingV1().NetworkPolicies(cluster.Namespace).Apply(ctx, desiredHeadNetworkPolicy(cluster, r.Config, kubeRayNamespaces), metav1.ApplyOptions{FieldManager: controllerName, Force: true})
+	_, err := r.kubeClient.NetworkingV1().NetworkPolicies(cluster.Namespace).Apply(ctx, desiredHeadNetworkPolicy(cluster, r.Config, kubeRayNamespaces), metav1.ApplyOptions{FieldManager: controllerName, Force: true})
 	if err != nil {
 		logger.Error(err, "Failed to update NetworkPolicy")
 	}