Don't include port in config when not specified.

When no port is specified the flag default of "-1" is taken.

Fixes #4305

pkg/kubectl/run.go

@@ -79,11 +79,15 @@ func (BasicReplicationController) Generate(params map[string]string) (runtime.Ob
 		if err != nil {
 			return nil, err
 		}
+
+		// Don't include the port if it was not specified.
+		if port > 0 {
 			controller.Spec.Template.Spec.Containers[0].Ports = []api.Port{
 				{
 					ContainerPort: port,
 				},
 			}
 		}
+	}
 	return &controller, nil
 }

pkg/kubectl/run_test.go

@@ -34,6 +34,7 @@ func TestGenerate(t *testing.T) {
 				"name":     "foo",
 				"image":    "someimage",
 				"replicas": "1",
+				"port":     "-1",
 			},
 			expected: &api.ReplicationController{
 				ObjectMeta: api.ObjectMeta{