in gce-containers-startup/volumes/volumes.go [288:293]
func (env Env) processEmptyDirVolume(volume *api.EmptyDirVolume, volumeName string) (VolumeHostPathAndMode, error) {
if volume.Medium != "Memory" {
return VolumeHostPathAndMode{}, fmt.Errorf("Unsupported emptyDir volume medium: %s", volume.Medium)
}
return env.processMemoryBackedEmptyDirVolume(volume, volumeName)
}