Merge pull request kubernetes#81507 from eloyekunle/fix/scale-client

update scale client to support non-namespaced resources

Author: k8s-ci-robot

staging/src/k8s.io/client-go/scale/client.go

@@ -150,7 +150,7 @@ func (c *namespacedScaleClient) Get(resource schema.GroupResource, name string)
 
 	result := c.client.clientBase.Get().
 		AbsPath(path).
-		Namespace(c.namespace).
+		NamespaceIfScoped(c.namespace, c.namespace != "").
 		Resource(gvr.Resource).
 		Name(name).
 		SubResource("scale").
@@ -191,7 +191,7 @@ func (c *namespacedScaleClient) Update(resource schema.GroupResource, scale *aut
 
 	result := c.client.clientBase.Put().
 		AbsPath(path).
-		Namespace(c.namespace).
+		NamespaceIfScoped(c.namespace, c.namespace != "").
 		Resource(gvr.Resource).
 		Name(scale.Name).
 		SubResource("scale").
@@ -211,7 +211,7 @@ func (c *namespacedScaleClient) Patch(gvr schema.GroupVersionResource, name stri
 	groupVersion := gvr.GroupVersion()
 	result := c.client.clientBase.Patch(pt).
 		AbsPath(c.client.apiPathFor(groupVersion)).
-		Namespace(c.namespace).
+		NamespaceIfScoped(c.namespace, c.namespace != "").
 		Resource(gvr.Resource).
 		Name(name).
 		SubResource("scale").

staging/src/k8s.io/client-go/scale/interfaces.go

@@ -23,8 +23,9 @@ import (
 )
 
 // ScalesGetter can produce a ScaleInterface
-// for a particular namespace.
 type ScalesGetter interface {
+	// Scales produces a ScaleInterface for a particular namespace.
+	// Set namespace to the empty string for non-namespaced resources.
 	Scales(namespace string) ScaleInterface
 }