Merge pull request #4155 from Yan-Daojiang/automated-cherry-pick-of-#…

…4144-upstream-release-1.5

Automated cherry pick of #4144: fix: cannot access ResourceRegistry with its singularName

pkg/registry/search/storage/resourceregistry.go

@@ -25,10 +25,11 @@ func NewResourceRegistryStorage(scheme *runtime.Scheme, optsGetter generic.RESTO
 	strategy := searchregistry.NewStrategy(scheme)
 
 	store := &genericregistry.Store{
-		NewFunc:                  func() runtime.Object { return &searchapis.ResourceRegistry{} },
-		NewListFunc:              func() runtime.Object { return &searchapis.ResourceRegistryList{} },
-		PredicateFunc:            searchregistry.MatchResourceRegistry,
-		DefaultQualifiedResource: searchapis.Resource("resourceRegistries"),
+		NewFunc:       func() runtime.Object { return &searchapis.ResourceRegistry{} },
+		NewListFunc:   func() runtime.Object { return &searchapis.ResourceRegistryList{} },
+		PredicateFunc: searchregistry.MatchResourceRegistry,
+		// NOTE: plural name and singular name of the resource must be all lowercase.
+		DefaultQualifiedResource: searchapis.Resource("resourceregistries"),
 
 		CreateStrategy: strategy,
 		UpdateStrategy: strategy,