Golang fieldpath.ExtractFieldPathAsString函數代碼示例

// collectData collects requested downwardAPI in data map.
// Map's key is the requested name of file to dump
// Map's value is the (sorted) content of the field to be dumped in the file.
func (d *downwardAPIVolume) collectData() (map[string][]byte, error) {
	errlist := []error{}
	data := make(map[string][]byte)
	for _, fileInfo := range d.items {
		if fileInfo.FieldRef != nil {
			if values, err := fieldpath.ExtractFieldPathAsString(d.pod, fileInfo.FieldRef.FieldPath); err != nil {
				glog.Errorf("Unable to extract field %s: %s", fileInfo.FieldRef.FieldPath, err.Error())
				errlist = append(errlist, err)
			} else {
				data[path.Clean(fileInfo.Path)] = []byte(sortLines(values))
			}
		} else if fileInfo.ResourceFieldRef != nil {
			containerName := fileInfo.ResourceFieldRef.ContainerName
			nodeAllocatable, err := d.plugin.host.GetNodeAllocatable()
			if err != nil {
				errlist = append(errlist, err)
			} else if values, err := fieldpath.ExtractResourceValueByContainerNameAndNodeAllocatable(fileInfo.ResourceFieldRef, d.pod, containerName, nodeAllocatable); err != nil {
				glog.Errorf("Unable to extract field %s: %s", fileInfo.ResourceFieldRef.Resource, err.Error())
				errlist = append(errlist, err)
			} else {
				data[path.Clean(fileInfo.Path)] = []byte(sortLines(values))
			}
		}
	}
	return data, utilerrors.NewAggregate(errlist)
}

// collectData collects requested metadata in data map.
// Map's key is the requested name of file to dump
// Map's value is the (sorted) content of the field to be dumped in the file.
func (m *metadataVolume) collectData(data *map[string]string) error {
	errlist := []error{}
	for fieldReference, fileName := range m.fieldReferenceFileNames {
		if values, err := fieldpath.ExtractFieldPathAsString(m.pod, fieldReference); err != nil {
			glog.Error(err)
			errlist = append(errlist, err)
		} else {
			(*data)[fileName] = sortLines(values)
		}
	}
	return utilErrors.NewAggregate(errlist)
}

func envValueFrom(pod *api.Pod, e api.EnvVar) string {
	internalFieldPath, _, err := api.Scheme.ConvertFieldLabel(e.ValueFrom.FieldRef.APIVersion, "Pod", e.ValueFrom.FieldRef.FieldPath, "")
	if err != nil {
		return "" // pod validation should catch this on create
	}

	valueFrom, err := fieldpath.ExtractFieldPathAsString(pod, internalFieldPath)
	if err != nil {
		return "" // pod validation should catch this on create
	}

	return valueFrom
}

// collectData collects requested downwardAPI in data map.
// Map's key is the requested name of file to dump
// Map's value is the (sorted) content of the field to be dumped in the file.
func (d *downwardAPIVolume) collectData() (map[string]string, error) {
	errlist := []error{}
	data := make(map[string]string)
	for fieldReference, fileName := range d.fieldReferenceFileNames {
		if values, err := fieldpath.ExtractFieldPathAsString(d.pod, fieldReference); err != nil {
			glog.Errorf("Unable to extract field %s: %s", fieldReference, err.Error())
			errlist = append(errlist, err)
		} else {
			data[fileName] = sortLines(values)
		}
	}
	return data, utilErrors.NewAggregate(errlist)
}

// podFieldSelectorRuntimeValue returns the runtime value of the given
// selector for a pod.
func (kl *Kubelet) podFieldSelectorRuntimeValue(fs *api.ObjectFieldSelector, pod *api.Pod, podIP string) (string, error) {
	internalFieldPath, _, err := api.Scheme.ConvertFieldLabel(fs.APIVersion, "Pod", fs.FieldPath, "")
	if err != nil {
		return "", err
	}
	switch internalFieldPath {
	case "spec.nodeName":
		return pod.Spec.NodeName, nil
	case "spec.serviceAccountName":
		return pod.Spec.ServiceAccountName, nil
	case "status.podIP":
		return podIP, nil
	}
	return fieldpath.ExtractFieldPathAsString(pod, internalFieldPath)
}

func getEnvVarRefValue(f *clientcmd.Factory, store *resourceStore, from *kapi.EnvVarSource, obj runtime.Object, c *kapi.Container) (string, error) {
	if from.SecretKeyRef != nil {
		return getSecretRefValue(f, store, from.SecretKeyRef)
	}

	if from.ConfigMapKeyRef != nil {
		return getConfigMapRefValue(f, store, from.ConfigMapKeyRef)
	}

	if from.FieldRef != nil {
		return fieldpath.ExtractFieldPathAsString(obj, from.FieldRef.FieldPath)
	}

	if from.ResourceFieldRef != nil {
		return fieldpath.ExtractContainerResourceValue(from.ResourceFieldRef, c)
	}

	return "", fmt.Errorf("invalid valueFrom")
}

// collectData collects requested downwardAPI in data map.
// Map's key is the requested name of file to dump
// Map's value is the (sorted) content of the field to be dumped in the file.
func (d *downwardAPIVolume) collectData(defaultMode *int32) (map[string]volumeutil.FileProjection, error) {
	if defaultMode == nil {
		return nil, fmt.Errorf("No defaultMode used, not even the default value for it")
	}

	errlist := []error{}
	data := make(map[string]volumeutil.FileProjection)
	for _, fileInfo := range d.items {
		var fileProjection volumeutil.FileProjection
		fPath := path.Clean(fileInfo.Path)
		if fileInfo.Mode != nil {
			fileProjection.Mode = *fileInfo.Mode
		} else {
			fileProjection.Mode = *defaultMode
		}
		if fileInfo.FieldRef != nil {
			// TODO: unify with Kubelet.podFieldSelectorRuntimeValue
			if values, err := fieldpath.ExtractFieldPathAsString(d.pod, fileInfo.FieldRef.FieldPath); err != nil {
				glog.Errorf("Unable to extract field %s: %s", fileInfo.FieldRef.FieldPath, err.Error())
				errlist = append(errlist, err)
			} else {
				fileProjection.Data = []byte(sortLines(values))
			}
		} else if fileInfo.ResourceFieldRef != nil {
			containerName := fileInfo.ResourceFieldRef.ContainerName
			nodeAllocatable, err := d.plugin.host.GetNodeAllocatable()
			if err != nil {
				errlist = append(errlist, err)
			} else if values, err := fieldpath.ExtractResourceValueByContainerNameAndNodeAllocatable(fileInfo.ResourceFieldRef, d.pod, containerName, nodeAllocatable); err != nil {
				glog.Errorf("Unable to extract field %s: %s", fileInfo.ResourceFieldRef.Resource, err.Error())
				errlist = append(errlist, err)
			} else {
				fileProjection.Data = []byte(sortLines(values))
			}
		}

		data[fPath] = fileProjection
	}
	return data, utilerrors.NewAggregate(errlist)
}