Provide a client method to bypass server side timeout on upload

pkg/image/controller/imagestream_controller.go

@@ -265,7 +265,7 @@ func handleImageStream(
 			ImportPolicy: imageapi.TagImportPolicy{Insecure: insecure},
 		}
 	}
-	result, err := client.ImageStreamImports(stream.Namespace).Create(isi)
+	result, err := client.ImageStreamImports(stream.Namespace).CreateWithoutTimeout(isi)
 	if err != nil {
 		if apierrs.IsNotFound(err) && isStatusErrorKind(err, "imageStream") {
 			return result, ErrNotImportable

pkg/image/generated/internalclientset/typed/image/internalversion/imagestreamimport_expansion.go

@@ -0,0 +1,26 @@
+package internalversion
+
+import (
+	"time"
+
+	image "github.com/openshift/origin/pkg/image/apis/image"
+)
+
+type ImageStreamImportExpansion interface {
+	CreateWithoutTimeout(*image.ImageStreamImport) (*image.ImageStreamImport, error)
+}
+
+// CreateWithoutTimeout imports the provided images and won't time out after 30 seconds. Use this when you must
+// import a large number of images.
+func (c *imageStreamImports) CreateWithoutTimeout(imageStreamImport *image.ImageStreamImport) (result *image.ImageStreamImport, err error) {
+	result = &image.ImageStreamImport{}
+	err = c.client.Post().
+		Namespace(c.ns).
+		Resource("imagestreamimports").
+		Body(imageStreamImport).
+		// this instructs the api server to allow our request to take up to an hour - chosen as a high boundary
+		Timeout(time.Hour).
+		Do().
+		Into(result)
+	return
+}