exit with usage when need login to image registry

pkg/minikube/image/image.go

@@ -103,6 +103,14 @@ func WriteImageToDaemon(img string) error {
 	glog.V(3).Infof("Getting image %v", ref)
 	i, err := remote.Image(ref)
 	if err != nil {
+		if strings.Contains(err.Error(), "GitHub Docker Registry needs login") {
+			ErrGithubNeedsLogin = errors.New(err.Error())
+			return ErrGithubNeedsLogin
+		} else if strings.Contains(err.Error(), "UNAUTHORIZED") {
+			ErrNeedsLogin = errors.New(err.Error())
+			return ErrNeedsLogin
+		}
+
 		return errors.Wrap(err, "getting remote image")
 	}
 	tag, err := name.NewTag(strings.Split(img, "@")[0])

pkg/minikube/image/types.go

@@ -0,0 +1,23 @@
+/*
+Copyright 2020 The Kubernetes Authors All rights reserved.
+
+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 image
+
+// ErrNeedsLogin is thrown when registry needs login (a general error)
+var ErrNeedsLogin error
+
+// ErrGithubNeedsLogin is thrown when user needs to login specifically to github packages)
+var ErrGithubNeedsLogin error

pkg/minikube/node/cache.go

@@ -19,6 +19,7 @@ package node
 import (
 	"os"
 	"runtime"
+	"strings"
 
 	"github.com/golang/glog"
 	"github.com/pkg/errors"
@@ -126,8 +127,23 @@ func beginDownloadKicArtifacts(g *errgroup.Group, cc *config.ClusterConfig) {
 // WaitDownloadKicArtifacts blocks until the required artifacts for KIC are downloaded.
 func waitDownloadKicArtifacts(g *errgroup.Group) {
 	if err := g.Wait(); err != nil {
-		glog.Errorln("Error downloading kic artifacts: ", err)
-		return
+		if err != nil {
+			if errors.Is(err, image.ErrGithubNeedsLogin) {
+				glog.Warningf("Error downloading kic artifacts: %v", err)
+				out.ErrT(out.Connectivity, "Unfortunately, could not download the base image {{.image_name}} ", out.V{"image_name": strings.Split(kic.BaseImage, "@")[0]})
+				out.WarningT("In order to use the fall back image, you need to log in to the github packages registry")
+				out.T(out.Documentation, `Please visit the following link for documentation around this: 
+	https://help.github.com/en/packages/using-github-packages-with-your-projects-ecosystem/configuring-docker-for-use-with-github-packages#authenticating-to-github-packages
+`)
+			}
+			if errors.Is(err, image.ErrGithubNeedsLogin) || errors.Is(err, image.ErrNeedsLogin) {
+				exit.UsageT(`Please either authenticate to the registry or use --base-image flag to use a different registry.`)
+			} else {
+				glog.Errorln("Error downloading kic artifacts: ", err)
+			}
+
+		}
+
 	}
 	glog.Info("Successfully downloaded all kic artifacts")
 }