func makePayload(mappings []v1.KeyToPath, configMap *v1.ConfigMap, defaultMode *int32) (map[string]volumeutil.FileProjection, error) {
if defaultMode == nil {
return nil, fmt.Errorf("No defaultMode used, not even the default value for it")
}
payload := make(map[string]volumeutil.FileProjection, len(configMap.Data))
var fileProjection volumeutil.FileProjection
if len(mappings) == 0 {
for name, data := range configMap.Data {
fileProjection.Data = []byte(data)
fileProjection.Mode = *defaultMode
payload[name] = fileProjection
}
} else {
for _, ktp := range mappings {
content, ok := configMap.Data[ktp.Key]
if !ok {
err_msg := "references non-existent config key"
glog.Errorf(err_msg)
return nil, fmt.Errorf(err_msg)
}
fileProjection.Data = []byte(content)
if ktp.Mode != nil {
fileProjection.Mode = *ktp.Mode
} else {
fileProjection.Mode = *defaultMode
}
payload[ktp.Path] = fileProjection
}
}
return payload, nil
}
// 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)
}