Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/kubelet/images/helpers.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2016 The Kubernetes 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 images
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/client-go/util/flowcontrol"
+	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
+)
+
+// throttleImagePulling wraps kubecontainer.ImageService to throttle image
+// pulling based on the given QPS and burst limits. If QPS is zero, defaults
+// to no throttling.
+func throttleImagePulling(imageService kubecontainer.ImageService, qps float32, burst int) kubecontainer.ImageService {
+	if qps == 0.0 {
+		return imageService
+	}
+	return &throttledImageService{
+		ImageService: imageService,
+		limiter:      flowcontrol.NewTokenBucketRateLimiter(qps, burst),
+	}
+}
+
+type throttledImageService struct {
+	kubecontainer.ImageService
+	limiter flowcontrol.RateLimiter
+}
+
+func (ts throttledImageService) PullImage(image kubecontainer.ImageSpec, secrets []v1.Secret) (string, error) {
+	if ts.limiter.TryAccept() {
+		return ts.ImageService.PullImage(image, secrets)
+	}
+	return "", fmt.Errorf("pull QPS exceeded.")
+}