Add alerting http proxy option

Signed-off-by: Léopold Jacquot <leopold.jacquot@infomaniak.com>

pkg/controller/events.go

@@ -149,9 +149,13 @@ func (c *Controller) alert(canary *flaggerv1.Canary, message string, metadata bo
 		if provider.Spec.Channel != "" {
 			channel = provider.Spec.Channel
 		}
+		proxy := ""
+		if provider.Spec.Proxy != "" {
+			proxy = provider.Spec.Proxy
+		}
 
 		// create notifier based on provider type
-		f := notifier.NewFactory(url, username, channel)
+		f := notifier.NewFactory(url, proxy, username, channel)
 		n, err := f.Notifier(provider.Spec.Type)
 		if err != nil {
 			c.logger.With("canary", fmt.Sprintf("%s.%s", canary.Name, canary.Namespace)).

pkg/controller/webhook.go

@@ -61,7 +61,10 @@ func callWebhook(webhook string, payload interface{}, timeout string) error {
 	ctx, cancel := context.WithTimeout(req.Context(), t)
 	defer cancel()
 
-	r, err := http.DefaultClient.Do(req.WithContext(ctx))
+	httpClient := http.DefaultClient
+	httpClient.Transport = http.DefaultTransport
+
+	r, err := httpClient.Do(req.WithContext(ctx))
 	if err != nil {
 		return err
 	}