Remove retries to ExternalName (#4584)

internal/ingress/controller/endpoints.go

@@ -21,9 +21,7 @@ import (
 	"net"
 	"reflect"
 	"strconv"
-	"time"
 
-	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/klog"
 
 	corev1 "k8s.io/api/core/v1"
@@ -60,26 +58,9 @@ func getEndpoints(s *corev1.Service, port *corev1.ServicePort, proto corev1.Prot
 
 		// if the externalName is not an IP address we need to validate is a valid FQDN
 		if net.ParseIP(s.Spec.ExternalName) == nil {
-			defaultRetry := wait.Backoff{
-				Steps:    2,
-				Duration: 1 * time.Second,
-				Factor:   1.5,
-				Jitter:   0.2,
-			}
-
-			var lastErr error
-			err := wait.ExponentialBackoff(defaultRetry, func() (bool, error) {
-				_, err := net.LookupHost(s.Spec.ExternalName)
-				if err == nil {
-					return true, nil
-				}
-
-				lastErr = err
-				return false, nil
-			})
-
+			_, err := net.LookupHost(s.Spec.ExternalName)
 			if err != nil {
-				klog.Errorf("Error resolving host %q: %v", s.Spec.ExternalName, lastErr)
+				klog.Errorf("Error resolving host %q: %v", s.Spec.ExternalName, err)
 				return upsServers
 			}
 		}