Beispiel #1
0
// MetaNamespaceIndexFunc is a default index function that indexes based on an object's namespace
func MetaNamespaceIndexFunc(obj interface{}) ([]string, error) {
	meta, err := meta.Accessor(obj)
	if err != nil {
		return []string{""}, fmt.Errorf("object has no meta: %v", err)
	}
	return []string{meta.GetNamespace()}, nil
}
Beispiel #2
0
// GetReference returns an ObjectReference which refers to the given
// object, or an error if the object doesn't follow the conventions
// that would allow this.
// TODO: should take a meta.Interface see http://issue.k8s.io/7127
func GetReference(obj runtime.Object) (*ObjectReference, error) {
	if obj == nil {
		return nil, ErrNilObject
	}
	if ref, ok := obj.(*ObjectReference); ok {
		// Don't make a reference to a reference.
		return ref, nil
	}
	meta, err := meta.Accessor(obj)
	if err != nil {
		return nil, err
	}

	gvk := obj.GetObjectKind().GroupVersionKind()

	// if the object referenced is actually persisted, we can just get kind from meta
	// if we are building an object reference to something not yet persisted, we should fallback to scheme
	var kind string
	if gvk != nil {
		kind = gvk.Kind
	}
	if len(kind) == 0 {
		// TODO: this is wrong
		gvk, err := Scheme.ObjectKind(obj)
		if err != nil {
			return nil, err
		}
		kind = gvk.Kind
	}

	// if the object referenced is actually persisted, we can also get version from meta
	var version string
	if gvk != nil {
		version = gvk.GroupVersion().String()
	}
	if len(version) == 0 {
		selfLink := meta.GetSelfLink()
		if len(selfLink) == 0 {
			return nil, ErrNoSelfLink
		}
		selfLinkUrl, err := url.Parse(selfLink)
		if err != nil {
			return nil, err
		}
		// example paths: /<prefix>/<version>/*
		parts := strings.Split(selfLinkUrl.Path, "/")
		if len(parts) < 3 {
			return nil, fmt.Errorf("unexpected self link format: '%v'; got version '%v'", selfLink, version)
		}
		version = parts[2]
	}

	return &ObjectReference{
		Kind:            kind,
		APIVersion:      version,
		Name:            meta.GetName(),
		Namespace:       meta.GetNamespace(),
		UID:             meta.GetUID(),
		ResourceVersion: meta.GetResourceVersion(),
	}, nil
}