code: func SetReady(dir string) {
  	if err := os.MkdirAll(dir, 0750); err != nil && !os.IsExist(err) {
  		klog.Errorf("Can't mkdir %s: %v", dir, err)
  		return
  	}
  
  	readyFile := filepath.Join(dir, readyFileName)
  	file, err := os.Create(readyFile)
  	if err != nil {
  		klog.Errorf("Can't touch %s: %v", readyFile, err)
  		return
  	}
  	file.Close()
  }
docs: // SetReady creates a file called 'ready' in the given
  // directory.  It logs an error if the file cannot be
  // created.