// containerResourceRuntimeValue returns the value of the provided container resource
func containerResourceRuntimeValue(fs *api.ResourceFieldSelector, pod *api.Pod, container *api.Container) (string, error) {
containerName := fs.ContainerName
if len(containerName) == 0 {
return fieldpath.ExtractContainerResourceValue(fs, container)
} else {
return fieldpath.ExtractResourceValueByContainerName(fs, pod, containerName)
}
}
// 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
if values, err := fieldpath.ExtractResourceValueByContainerName(fileInfo.ResourceFieldRef, d.pod, containerName); 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)
}