fix: update time format in audit webhook configuration

internal/resources/utils/audit.go

@@ -88,7 +88,7 @@ func applyAuditWebhookConfiguration(deployment *appsv1.Deployment, config *opera
 	}
 
 	if val := config.BatchMaxWait; val != nil {
-		extraArgs = append(extraArgs, fmt.Sprintf("--audit-webhook-batch-max-wait=%v", val.String()))
+		extraArgs = append(extraArgs, fmt.Sprintf("--audit-webhook-batch-max-wait=%v", val.Duration.String()))
 	}
 
 	if val := config.BatchThrottleBurst; val != 0 {
@@ -104,7 +104,7 @@ func applyAuditWebhookConfiguration(deployment *appsv1.Deployment, config *opera
 	}
 
 	if val := config.InitialBackoff; val != nil {
-		extraArgs = append(extraArgs, fmt.Sprintf("--audit-webhook-initial-backoff=%v", val.String()))
+		extraArgs = append(extraArgs, fmt.Sprintf("--audit-webhook-initial-backoff=%v", val.Duration.String()))
 	}
 
 	if val := config.Mode; val != "" {

internal/resources/utils/audit_test.go

@@ -0,0 +1,131 @@
+/*
+Copyright 2026 The kcp Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package utils
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	operatorv1alpha1 "github.com/kcp-dev/kcp-operator/sdk/apis/operator/v1alpha1"
+)
+
+func TestApplyAuditWebhookConfiguration(t *testing.T) {
+	tests := []struct {
+		name           string
+		config         *operatorv1alpha1.AuditWebhookSpec
+		validateResult func(t *testing.T, deployment *appsv1.Deployment)
+	}{
+		{
+			name:   "nil config does nothing",
+			config: nil,
+			validateResult: func(t *testing.T, deployment *appsv1.Deployment) {
+				container := deployment.Spec.Template.Spec.Containers[0]
+				assert.Equal(t, []string{"--existing-arg=value"}, container.Args)
+				assert.Empty(t, deployment.Spec.Template.Spec.Volumes)
+				assert.Empty(t, container.VolumeMounts)
+			},
+		},
+		{
+			name:   "empty config adds nothing",
+			config: &operatorv1alpha1.AuditWebhookSpec{},
+			validateResult: func(t *testing.T, deployment *appsv1.Deployment) {
+				container := deployment.Spec.Template.Spec.Containers[0]
+				assert.Equal(t, []string{"--existing-arg=value"}, container.Args)
+				assert.Empty(t, deployment.Spec.Template.Spec.Volumes)
+				assert.Empty(t, container.VolumeMounts)
+			},
+		},
+		{
+			name: "all supported fields produce expected args and mounts",
+			config: &operatorv1alpha1.AuditWebhookSpec{
+				BatchBufferSize:      100,
+				BatchMaxSize:         50,
+				BatchMaxWait:         &metav1.Duration{Duration: 30 * time.Second},
+				BatchThrottleBurst:   10,
+				BatchThrottleEnable:  true,
+				BatchThrottleQPS:     "5.5",
+				ConfigSecretName:     "audit-webhook-kubeconfig",
+				InitialBackoff:       &metav1.Duration{Duration: 2 * time.Second},
+				Mode:                 operatorv1alpha1.AuditWebhookBlockingStrictMode,
+				TruncateEnabled:      true,
+				TruncateMaxBatchSize: 1000,
+				TruncateMaxEventSize: 2000,
+				Version:              "audit.k8s.io/v1",
+			},
+			validateResult: func(t *testing.T, deployment *appsv1.Deployment) {
+				container := deployment.Spec.Template.Spec.Containers[0]
+				args := container.Args
+
+				assert.Contains(t, args, "--existing-arg=value")
+				assert.Contains(t, args, "--audit-webhook-batch-buffer-size=100")
+				assert.Contains(t, args, "--audit-webhook-batch-max-size=50")
+				assert.Contains(t, args, "--audit-webhook-batch-max-wait=30s")
+				assert.Contains(t, args, "--audit-webhook-batch-throttle-burst=10")
+				assert.Contains(t, args, "--audit-webhook-batch-throttle-enable")
+				assert.Contains(t, args, "--audit-webhook-batch-throttle-qps=5.5")
+				assert.Contains(t, args, "--audit-webhook-initial-backoff=2s")
+				assert.Contains(t, args, "--audit-webhook-mode=blocking-strict")
+				assert.Contains(t, args, "--audit-webhook-truncate-enabled")
+				assert.Contains(t, args, "--audit-webhook-truncate-max-batch-size=1000")
+				assert.Contains(t, args, "--audit-webhook-truncate-max-event-sizes=2000")
+				assert.Contains(t, args, "--audit-webhook-version=audit.k8s.io/v1")
+				assert.Contains(t, args, "--audit-webhook-config-file=/etc/kcp/audit/webhook/kubeconfig")
+
+				assert.Len(t, deployment.Spec.Template.Spec.Volumes, 1)
+				volume := deployment.Spec.Template.Spec.Volumes[0]
+				assert.Equal(t, "audit-webhook-config", volume.Name)
+				require.NotNil(t, volume.Secret)
+				assert.Equal(t, "audit-webhook-kubeconfig", volume.Secret.SecretName)
+
+				assert.Len(t, container.VolumeMounts, 1)
+				mount := container.VolumeMounts[0]
+				assert.Equal(t, "audit-webhook-config", mount.Name)
+				assert.Equal(t, "/etc/kcp/audit/webhook", mount.MountPath)
+				assert.True(t, mount.ReadOnly)
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			deployment := &appsv1.Deployment{
+				Spec: appsv1.DeploymentSpec{
+					Template: corev1.PodTemplateSpec{
+						Spec: corev1.PodSpec{
+							Containers: []corev1.Container{
+								{
+									Name: "kcp",
+									Args: []string{"--existing-arg=value"},
+								},
+							},
+						},
+					},
+				},
+			}
+
+			applyAuditWebhookConfiguration(deployment, tt.config)
+			tt.validateResult(t, deployment)
+		})
+	}
+}