Check the existence of the expected service when ignoring the NodePort already allocated error

Check the existence of the expected service when ignoring the NodePort already allocated error

Fixes 2308

Signed-off-by: Wenkai Yin(尹文开) <yinw@vmware.com>

pkg/builder/service_builder.go

@@ -0,0 +1,57 @@
+/*
+Copyright the Velero contributors.
+
+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 builder
+
+import (
+	corev1api "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// ServiceBuilder builds Service objects.
+type ServiceBuilder struct {
+	object *corev1api.Service
+}
+
+// ForService is the constructor for a ServiceBuilder.
+func ForService(ns, name string) *ServiceBuilder {
+	return &ServiceBuilder{
+		object: &corev1api.Service{
+			TypeMeta: metav1.TypeMeta{
+				APIVersion: corev1api.SchemeGroupVersion.String(),
+				Kind:       "Service",
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Namespace: ns,
+				Name:      name,
+			},
+		},
+	}
+}
+
+// Result returns the built Service.
+func (s *ServiceBuilder) Result() *corev1api.Service {
+	return s.object
+}
+
+// ObjectMeta applies functional options to the Service's ObjectMeta.
+func (s *ServiceBuilder) ObjectMeta(opts ...ObjectMetaOpt) *ServiceBuilder {
+	for _, opt := range opts {
+		opt(s.object)
+	}
+
+	return s
+}