| /* |
| Copyright 2017 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package pods |
| |
| import ( |
| "fmt" |
| |
| "k8s.io/kubernetes/pkg/fieldpath" |
| ) |
| |
| // ConvertDownwardAPIFieldLabel converts the specified downward API field label |
| // and its value in the pod of the specified version to the internal version, |
| // and returns the converted label and value. This function returns an error if |
| // the conversion fails. |
| func ConvertDownwardAPIFieldLabel(version, label, value string) (string, string, error) { |
| if version != "v1" { |
| return "", "", fmt.Errorf("unsupported pod version: %s", version) |
| } |
| |
| if path, _, ok := fieldpath.SplitMaybeSubscriptedPath(label); ok { |
| switch path { |
| case "metadata.annotations", "metadata.labels": |
| return label, value, nil |
| default: |
| return "", "", fmt.Errorf("field label does not support subscript: %s", label) |
| } |
| } |
| |
| switch label { |
| case "metadata.annotations", |
| "metadata.labels", |
| "metadata.name", |
| "metadata.namespace", |
| "metadata.uid", |
| "spec.nodeName", |
| "spec.restartPolicy", |
| "spec.serviceAccountName", |
| "spec.schedulerName", |
| "status.phase", |
| "status.hostIP", |
| "status.podIP": |
| return label, value, nil |
| // This is for backwards compatibility 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) |
| } |
| } |