Add path component to finalizer (#202)

The Kubernetes client warns about not having a path component in the
finalizer. This change adds a unqiue path component for each reconciler
kind.

internal/k8sutil/finalizer.go

@@ -0,0 +1,7 @@
+package k8sutil
+
+const NetbirdFinalizer = "finalizers.netbird.io"
+
+func Finalizer(kind string) string {
+	return NetbirdFinalizer + "/" + kind
+}

internal/k8sutil/owner.go

@@ -0,0 +1,36 @@
+package k8sutil
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+	metav1ac "k8s.io/client-go/applyconfigurations/meta/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
+)
+
+func ControllerReference(owner client.Object, scheme *runtime.Scheme) (*metav1ac.OwnerReferenceApplyConfiguration, error) {
+	gvk, err := apiutil.GVKForObject(owner, scheme)
+	if err != nil {
+		return nil, err
+	}
+	return metav1ac.OwnerReference().
+		WithAPIVersion(gvk.GroupVersion().String()).
+		WithKind(gvk.Kind).
+		WithName(owner.GetName()).
+		WithUID(owner.GetUID()).
+		WithController(true).
+		WithBlockOwnerDeletion(true), nil
+}
+
+func OwnerReference(owner client.Object, scheme *runtime.Scheme) (*metav1ac.OwnerReferenceApplyConfiguration, error) {
+	gvk, err := apiutil.GVKForObject(owner, scheme)
+	if err != nil {
+		return nil, err
+	}
+	return metav1ac.OwnerReference().
+		WithAPIVersion(gvk.GroupVersion().String()).
+		WithKind(gvk.Kind).
+		WithName(owner.GetName()).
+		WithUID(owner.GetUID()).
+		WithController(false).
+		WithBlockOwnerDeletion(false), nil
+}