Add EventSource to api to have both Component and Host information.

pkg/registry/event/rest.go

@@ -109,7 +109,7 @@ func (rs *REST) getAttrs(obj runtime.Object) (objLabels, objFields labels.Set, e
 		"condition":                      event.Condition,
 		"status":                         event.Condition, // TODO: remove me when we version fields
 		"reason":                         event.Reason,
-		"source":                         event.Source,
+		"source":                         event.Source.Component,
 	}, nil
 }
 

pkg/registry/event/rest_test.go

@@ -145,7 +145,7 @@ func TestRESTgetAttrs(t *testing.T) {
 		},
 		Condition: "Tested",
 		Reason:    "ForTesting",
-		Source:    "test",
+		Source:    api.EventSource{Component: "test"},
 	}
 	label, field, err := rest.getAttrs(eventA)
 	if err != nil {