kubernetes: Improve namespace usage (#4767)

* Use GetByKey instead of List in GetNamespaceByName.
* Add ToNamespace to reduce memory for namespace cache.

Signed-off-by: Mat Lowery <mlowery@ebay.com>

1 files changed, 4 insertions, 6 deletions

diff --git a/plugin/kubernetes/handler_test.go b/plugin/kubernetes/handler_test.go
index 19eed2d50..709d831b3 100644
--- a/plugin/kubernetes/handler_test.go
+++ b/plugin/kubernetes/handler_test.go
@@ -782,16 +782,14 @@ func (APIConnServeTest) GetNodeByName(ctx context.Context, name string) (*api.No
 	}, nil
 }
 
-func (APIConnServeTest) GetNamespaceByName(name string) (*api.Namespace, error) {
+func (APIConnServeTest) GetNamespaceByName(name string) (*object.Namespace, error) {
 	if name == "pod-nons" { // handler_pod_verified_test.go uses this for non-existent namespace.
-		return &api.Namespace{}, nil
+		return nil, fmt.Errorf("namespace not found")
 	}
 	if name == "nsnoexist" {
 		return nil, fmt.Errorf("namespace not found")
 	}
-	return &api.Namespace{
-		ObjectMeta: meta.ObjectMeta{
-			Name: name,
-		},
+	return &object.Namespace{
+		Name: name,
 	}, nil
 }