if err != nil {
		return "", "", nil
	}

	var certKeyPathFn = func(dataDir string) (string, string, string) {
		outputDir := filepath.Join(certDir, dataDir)
		return outputDir, filepath.Join(outputDir, "kubelet.cert"), filepath.Join(outputDir, "kubelet.key")
	}

	writeDir, writeCertPath, writeKeyPath := certKeyPathFn("identity.tmp")
	if err := os.Mkdir(writeDir, 0777); err != nil {
		return "", "", err