fix(#5402): Make sure to enable Knative profile

- Use Knative profile when Serving or Eventing is installed on cluster
- Make sure to enable Knative trait when Serving or Eventing is installed
- Enable knative-service trait only when Knative Serving is installed

pkg/controller/integration/platform_setup.go

@@ -97,7 +97,7 @@ func determineBestTraitProfile(c client.Client, integration *v1.Integration, p *
 		// Use platform spec profile if set
 		return p.Spec.Profile, nil
 	}
-	if ok, err := knative.IsServingInstalled(c); err != nil {
+	if ok, err := knative.IsInstalled(c); err != nil {
 		return "", err
 	} else if ok {
 		return v1.TraitProfileKnative, nil

pkg/controller/kameletbinding/integration.go

@@ -248,7 +248,7 @@ func determineTraitProfile(ctx context.Context, c client.Client, binding *v1alph
 			return pl.Spec.Profile, nil
 		}
 	}
-	if ok, err := knative.IsServingInstalled(c); err != nil {
+	if ok, err := knative.IsInstalled(c); err != nil {
 		return "", err
 	} else if ok {
 		return v1.TraitProfileKnative, nil

pkg/controller/pipe/integration.go

@@ -248,7 +248,7 @@ func determineTraitProfile(ctx context.Context, c client.Client, binding *v1.Pip
 			return pl.Spec.Profile, nil
 		}
 	}
-	if ok, err := knative.IsServingInstalled(c); err != nil {
+	if ok, err := knative.IsInstalled(c); err != nil {
 		return "", err
 	} else if ok {
 		return v1.TraitProfileKnative, nil

pkg/trait/knative_service.go

@@ -30,6 +30,7 @@ import (
 	v1 "github.com/apache/camel-k/v2/pkg/apis/camel/v1"
 	traitv1 "github.com/apache/camel-k/v2/pkg/apis/camel/v1/trait"
 	"github.com/apache/camel-k/v2/pkg/metadata"
+	"github.com/apache/camel-k/v2/pkg/util/knative"
 	"github.com/apache/camel-k/v2/pkg/util/kubernetes"
 )
 
@@ -149,6 +150,11 @@ func (t *knativeServiceTrait) SelectControllerStrategy(e *Environment) (*Control
 		return nil, nil
 	}
 
+	// Knative serving is required
+	if ok, _ := knative.IsServingInstalled(e.Client); !ok {
+		return nil, nil
+	}
+
 	var sources []v1.SourceSpec
 	var err error
 	if sources, err = kubernetes.ResolveIntegrationSources(e.Ctx, t.Client, e.Integration, e.Resources); err != nil {

pkg/util/knative/enabled.go

@@ -28,14 +28,27 @@ import (
 
 // IsRefKindInstalled returns true if the cluster has the referenced Kind installed.
 func IsRefKindInstalled(c kubernetes.Interface, ref corev1.ObjectReference) (bool, error) {
-	if installed, err := isInstalled(c, ref.GroupVersionKind().GroupVersion()); err != nil {
+	if installed, err := isServerResourceAvailable(c, ref.GroupVersionKind().GroupVersion()); err != nil {
 		return false, err
 	} else if installed {
 		return true, nil
 	}
 	return false, nil
 }
 
+// IsInstalled returns true if we are connected to a cluster with either Knative Serving or Eventing installed.
+func IsInstalled(c kubernetes.Interface) (bool, error) {
+	if ok, err := IsServingInstalled(c); ok {
+		return ok, err
+	} else if ok, err = IsEventingInstalled(c); ok {
+		return ok, err
+	} else if err != nil {
+		return false, err
+	}
+
+	return false, nil
+}
+
 // IsServingInstalled returns true if we are connected to a cluster with Knative Serving installed.
 func IsServingInstalled(c kubernetes.Interface) (bool, error) {
 	return IsRefKindInstalled(c, corev1.ObjectReference{
@@ -52,7 +65,7 @@ func IsEventingInstalled(c kubernetes.Interface) (bool, error) {
 	})
 }
 
-func isInstalled(c kubernetes.Interface, api schema.GroupVersion) (bool, error) {
+func isServerResourceAvailable(c kubernetes.Interface, api schema.GroupVersion) (bool, error) {
 	_, err := c.Discovery().ServerResourcesForGroupVersion(api.String())
 	if err != nil && (k8serrors.IsNotFound(err) || util.IsUnknownAPIError(err)) {
 		return false, nil