comment out TestUnchangedCAReloader test (flake)

Signed-off-by: Omer Aplatony <omerap12@gmail.com>

Author: omerap12

vertical-pod-autoscaler/pkg/admission-controller/certs_test.go

@@ -276,119 +276,120 @@ func TestChangedCAReloader(t *testing.T) {
 	assert.NotEqual(t, oldCAEncodedString, newCAEncodedString, "expected CA to change")
 }
 
-func TestUnchangedCAReloader(t *testing.T) {
-	tempDir := t.TempDir()
-	caCert := &x509.Certificate{
-		SerialNumber: big.NewInt(0),
-		Subject: pkix.Name{
-			Organization: []string{"ca"},
-		},
-		NotBefore:             time.Now(),
-		NotAfter:              time.Now().AddDate(2, 0, 0),
-		IsCA:                  true,
-		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
-		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
-		BasicConstraintsValid: true,
-	}
-	caKey, err := rsa.GenerateKey(rand.Reader, 4096)
-	if err != nil {
-		t.Error(err)
-	}
-	caBytes, err := x509.CreateCertificate(rand.Reader, caCert, caCert, &caKey.PublicKey, caKey)
-	if err != nil {
-		t.Error(err)
-	}
-	caPath := path.Join(tempDir, "ca.crt")
-	caFile, err := os.Create(caPath)
-	if err != nil {
-		t.Error(err)
-	}
-	err = pem.Encode(caFile, &pem.Block{
-		Type:  "CERTIFICATE",
-		Bytes: caBytes,
-	})
-	if err != nil {
-		t.Error(err)
-	}
-
-	testClientSet := fake.NewSimpleClientset()
-
-	selfRegistration(
-		testClientSet,
-		readFile(caPath),
-		0*time.Second,
-		"default",
-		"vpa-service",
-		"http://example.com/",
-		true,
-		int32(32),
-		"",
-		[]string{},
-		false,
-		"key1:value1,key2:value2",
-	)
-
-	webhookConfigInterface := testClientSet.AdmissionregistrationV1().MutatingWebhookConfigurations()
-	oldWebhookConfig, err := webhookConfigInterface.Get(context.TODO(), webhookConfigName, metav1.GetOptions{})
-	if err != nil {
-		t.Error(err)
-	}
-
-	assert.Len(t, oldWebhookConfig.Webhooks, 1, "expected one webhook configuration")
-	webhook := oldWebhookConfig.Webhooks[0]
-	oldWebhookCABundle := webhook.ClientConfig.CABundle
-
-	var reloadWebhookCACalled, patchCalled atomic.Bool
-	reloadWebhookCACalled.Store(false)
-	patchCalled.Store(false)
-	testClientSet.PrependReactor("get", "mutatingwebhookconfigurations", func(action k8stesting.Action) (bool, runtime.Object, error) {
-		reloadWebhookCACalled.Store(true)
-		return false, nil, nil
-	})
-	testClientSet.PrependReactor("patch", "mutatingwebhookconfigurations", func(action k8stesting.Action) (bool, runtime.Object, error) {
-		patchCalled.Store(true)
-		return false, nil, nil
-	})
-
-	reloader := certReloader{
-		clientCaPath:          caPath,
-		mutatingWebhookClient: testClientSet.AdmissionregistrationV1().MutatingWebhookConfigurations(),
-	}
-	stop := make(chan struct{})
-	defer close(stop)
-	if err := reloader.start(stop); err != nil {
-		t.Error(err)
-	}
-
-	originalCaFile, err := os.ReadFile(caPath)
-	if err != nil {
-		t.Error(err)
-	}
-	err = os.WriteFile(caPath, originalCaFile, 0666)
-	if err != nil {
-		t.Error(err)
-	}
-
-	oldCAEncodedString := base64.StdEncoding.EncodeToString(oldWebhookCABundle)
-
-	for tries := 0; tries < 10; tries++ {
-		if reloadWebhookCACalled.Load() {
-			break
-		}
-		time.Sleep(1 * time.Second)
-	}
-	if !reloadWebhookCACalled.Load() {
-		t.Error("expected reloadWebhookCA to be called")
-	}
-
-	assert.False(t, patchCalled.Load(), "expected patch to not be called")
-
-	newWebhookConfig, err := webhookConfigInterface.Get(context.TODO(), webhookConfigName, metav1.GetOptions{})
-	assert.Nil(t, err, "expected no error")
-	assert.NotNil(t, newWebhookConfig, "expected webhook configuration")
-	assert.Len(t, newWebhookConfig.Webhooks, 1, "expected one webhook configuration")
-
-	newWebhookCABundle := newWebhookConfig.Webhooks[0].ClientConfig.CABundle
-	newCAEncodedString := base64.StdEncoding.EncodeToString(newWebhookCABundle)
-	assert.Equal(t, oldCAEncodedString, newCAEncodedString, "expected CA to not change")
-}
+// TODO(omerap12): Temporary workaround for flakiness (#7831)
+// func TestUnchangedCAReloader(t *testing.T) {
+// 	tempDir := t.TempDir()
+// 	caCert := &x509.Certificate{
+// 		SerialNumber: big.NewInt(0),
+// 		Subject: pkix.Name{
+// 			Organization: []string{"ca"},
+// 		},
+// 		NotBefore:             time.Now(),
+// 		NotAfter:              time.Now().AddDate(2, 0, 0),
+// 		IsCA:                  true,
+// 		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
+// 		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
+// 		BasicConstraintsValid: true,
+// 	}
+// 	caKey, err := rsa.GenerateKey(rand.Reader, 4096)
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+// 	caBytes, err := x509.CreateCertificate(rand.Reader, caCert, caCert, &caKey.PublicKey, caKey)
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+// 	caPath := path.Join(tempDir, "ca.crt")
+// 	caFile, err := os.Create(caPath)
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+// 	err = pem.Encode(caFile, &pem.Block{
+// 		Type:  "CERTIFICATE",
+// 		Bytes: caBytes,
+// 	})
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+
+// 	testClientSet := fake.NewSimpleClientset()
+
+// 	selfRegistration(
+// 		testClientSet,
+// 		readFile(caPath),
+// 		0*time.Second,
+// 		"default",
+// 		"vpa-service",
+// 		"http://example.com/",
+// 		true,
+// 		int32(32),
+// 		"",
+// 		[]string{},
+// 		false,
+// 		"key1:value1,key2:value2",
+// 	)
+
+// 	webhookConfigInterface := testClientSet.AdmissionregistrationV1().MutatingWebhookConfigurations()
+// 	oldWebhookConfig, err := webhookConfigInterface.Get(context.TODO(), webhookConfigName, metav1.GetOptions{})
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+
+// 	assert.Len(t, oldWebhookConfig.Webhooks, 1, "expected one webhook configuration")
+// 	webhook := oldWebhookConfig.Webhooks[0]
+// 	oldWebhookCABundle := webhook.ClientConfig.CABundle
+
+// 	var reloadWebhookCACalled, patchCalled atomic.Bool
+// 	reloadWebhookCACalled.Store(false)
+// 	patchCalled.Store(false)
+// 	testClientSet.PrependReactor("get", "mutatingwebhookconfigurations", func(action k8stesting.Action) (bool, runtime.Object, error) {
+// 		reloadWebhookCACalled.Store(true)
+// 		return false, nil, nil
+// 	})
+// 	testClientSet.PrependReactor("patch", "mutatingwebhookconfigurations", func(action k8stesting.Action) (bool, runtime.Object, error) {
+// 		patchCalled.Store(true)
+// 		return false, nil, nil
+// 	})
+
+// 	reloader := certReloader{
+// 		clientCaPath:          caPath,
+// 		mutatingWebhookClient: testClientSet.AdmissionregistrationV1().MutatingWebhookConfigurations(),
+// 	}
+// 	stop := make(chan struct{})
+// 	defer close(stop)
+// 	if err := reloader.start(stop); err != nil {
+// 		t.Error(err)
+// 	}
+
+// 	originalCaFile, err := os.ReadFile(caPath)
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+// 	err = os.WriteFile(caPath, originalCaFile, 0666)
+// 	if err != nil {
+// 		t.Error(err)
+// 	}
+
+// 	oldCAEncodedString := base64.StdEncoding.EncodeToString(oldWebhookCABundle)
+
+// 	for tries := 0; tries < 10; tries++ {
+// 		if reloadWebhookCACalled.Load() {
+// 			break
+// 		}
+// 		time.Sleep(1 * time.Second)
+// 	}
+// 	if !reloadWebhookCACalled.Load() {
+// 		t.Error("expected reloadWebhookCA to be called")
+// 	}
+
+// 	assert.False(t, patchCalled.Load(), "expected patch to not be called")
+
+// 	newWebhookConfig, err := webhookConfigInterface.Get(context.TODO(), webhookConfigName, metav1.GetOptions{})
+// 	assert.Nil(t, err, "expected no error")
+// 	assert.NotNil(t, newWebhookConfig, "expected webhook configuration")
+// 	assert.Len(t, newWebhookConfig.Webhooks, 1, "expected one webhook configuration")
+
+// 	newWebhookCABundle := newWebhookConfig.Webhooks[0].ClientConfig.CABundle
+// 	newCAEncodedString := base64.StdEncoding.EncodeToString(newWebhookCABundle)
+// 	assert.Equal(t, oldCAEncodedString, newCAEncodedString, "expected CA to not change")
+// }