Add sleep before applying webhook config

pkg/admission/server.go

@@ -3,12 +3,14 @@ package admission
 import (
 	"context"
 	"net/http"
+	"time"
 
 	"github.com/rancher/dynamiclistener"
 	"github.com/rancher/dynamiclistener/server"
 	"github.com/rancher/wrangler/pkg/apply"
 	"github.com/rancher/wrangler/pkg/generated/controllers/core"
 	"github.com/rancher/wrangler/pkg/schemes"
+	"github.com/sirupsen/logrus"
 	v1 "k8s.io/api/admissionregistration/v1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -60,6 +62,10 @@ func listenAndServe(ctx context.Context, cfg *rest.Config, handler http.Handler)
 			return nil, nil
 		}
 
+		logrus.Info("Sleeping for 15 seconds then applying webhook config")
+		// Sleep here to make sure server is listening and all caches are primed
+		time.Sleep(15 * time.Second)
+
 		return secret, apply.WithOwner(secret).ApplyObjects(&v1.ValidatingWebhookConfiguration{
 			ObjectMeta: metav1.ObjectMeta{
 				Name: "rancher.cattle.io",