add spec.host as a synonym for spec.nodeName in v1

pkg/api/v1/conversion.go

@@ -44,6 +44,9 @@ func addConversionFuncs() {
 				"status.phase",
 				"spec.nodeName":
 				return label, value, nil
+		    // This is for backwards compatability with old v1 clients which send spec.host
+			case "spec.host":
+				return "spec.nodeName", value, nil
 			default:
 				return "", "", fmt.Errorf("field label not supported: %s", label)
 			}