// Adds a pki folder with a ca cert to the temp folder
	pkidir := testutil.SetupPkiDirWithCertificateAuthority(t, tmpdir)

	// Retrieves ca cert for assertions
	caCert, _, err := pkiutil.TryLoadCertAndKeyFromDisk(pkidir, kubeadmconstants.CACertAndKeyBaseName)
	if err != nil {
		t.Fatalf("couldn't retrieve ca cert: %v", err)
	}

	var tests = []struct {
		name                   string
		command                string

// NB. this method holds the information about how kubeadm creates kubeconfig files.
func getKubeConfigSpecs(cfg *kubeadmapi.InitConfiguration) (map[string]*kubeConfigSpec, error) {
	caCert, caKey, err := pkiutil.TryLoadCertAndKeyFromDisk(cfg.CertificatesDir, kubeadmconstants.CACertAndKeyBaseName)
	if os.IsNotExist(errors.Cause(err)) {
		return nil, errors.Wrap(err, "the CA files do not exist, please run `kubeadm init phase certs ca` to generate it")
	}

	_, csrErr := os.Stat(csrPath)
	_, keyErr := os.Stat(keyPath)

	return !(os.IsNotExist(csrErr) && os.IsNotExist(keyErr))
}

// TryLoadCertAndKeyFromDisk tries to load a cert and a key from the disk and validates that they are valid
func TryLoadCertAndKeyFromDisk(pkiPath, name string) (*x509.Certificate, crypto.Signer, error) {
	cert, err := TryLoadCertFromDisk(pkiPath, name)
	if err != nil {

	// Adds a pki folder with a ca cert to the temp folder
	pkidir := testutil.SetupPkiDirWithCertificateAuthority(t, tmpdir)

	// Retrieves ca cert for assertions
	caCert, _, err := pkiutil.TryLoadCertAndKeyFromDisk(pkidir, kubeadmconstants.CACertAndKeyBaseName)
	if err != nil {
		t.Fatalf("couldn't retrieve ca cert: %v", err)
	}

	// Creates an InitConfiguration pointing to the pkidir folder