feat: allow publish and download kicbase image in github release

hack/jenkins/release_build_and_upload.sh

@@ -39,7 +39,8 @@ grep -E "^VERSION_BUILD \\?=" Makefile | grep "${VERSION_BUILD}"
 
 # Force go packages to the Jekins home directory
 export GOPATH=$HOME/go
-
+# Make sure docker is installed and configured
+./hack/jenkins/installers/check_install_docker.sh
 # Verify ISO exists
 echo "Verifying ISO exists ..."
 make verify-iso
@@ -111,5 +112,20 @@ fi
 #echo "Updating Docker images ..."
 #make push-gvisor-addon-image push-storage-provisioner-manifest
 
+echo "Generating tarball for docker images"
+# first get the correct tag of the kic base image
+KIC_VERSION=$(grep -E "Version =" pkg/drivers/kic/types.go | cut -d \" -f 2 | cut -d "-" -f 1)
+# then generate tarballs for all achitectures
+for ARCH in "amd64" "arm64" "arm/v7" "ppc64le" "s390x" 
+do
+  SUFFIX=$(echo $ARCH | sed 's/\///g')
+  IMAGE_NAME=kicbase/stable:${KIC_VERSION}
+  TARBALL_NAME=out/kicbase-${KIC_VERSION}-${SUFFIX}.tar
+  docker pull ${IMAGE_NAME} --platform linux/${ARCH}
+  docker image save ${IMAGE_NAME} -o ${TARBALL_NAME}
+  openssl sha256 "${TARBALL_NAME}" | awk '{print $2}' > "${TARBALL_NAME}.sha256"
+  docker rmi -f ${IMAGE_NAME}
+done
+
 echo "Updating latest bucket for ${VERSION} release ..."
 gsutil cp -r "gs://${BUCKET}/releases/${TAGNAME}/*" "gs://${BUCKET}/releases/latest/"

pkg/minikube/download/download.go

@@ -65,7 +65,7 @@ func CreateDstDownloadMock(_, dst string) error {
 }
 
 // download is a well-configured atomic download function
-func download(src, dst string) error {
+func download(src, dst string, options ...getter.ClientOption) error {
 	var clientOptions []getter.ClientOption
 	if out.IsTerminal(os.Stdout) && !detect.GithubActionRunner() {
 		progress := getter.WithProgress(DefaultProgressBar)
@@ -76,6 +76,7 @@ func download(src, dst string) error {
 	} else {
 		clientOptions = []getter.ClientOption{}
 	}
+	clientOptions = append(clientOptions, options...)
 	tmpDst := dst + ".download"
 	client := &getter.Client{
 		Src:     src,

pkg/minikube/download/image.go

@@ -32,13 +32,15 @@ import (
 	"github.com/google/go-containerregistry/pkg/v1/daemon"
 	"github.com/google/go-containerregistry/pkg/v1/remote"
 	"github.com/google/go-containerregistry/pkg/v1/tarball"
+	"github.com/hashicorp/go-getter"
 	"github.com/pkg/errors"
 	"k8s.io/klog/v2"
 	"k8s.io/minikube/pkg/minikube/detect"
 	"k8s.io/minikube/pkg/minikube/image"
 	"k8s.io/minikube/pkg/minikube/localpath"
 	"k8s.io/minikube/pkg/minikube/out"
 	"k8s.io/minikube/pkg/minikube/out/register"
+	"k8s.io/minikube/pkg/version"
 )
 
 var (
@@ -224,6 +226,50 @@ func ImageToCache(img string) error {
 	}
 }
 
+func DownloadImageFromGithubToCache(img string, imgVersion string) (string, error) {
+	f := imagePathInCache(img)
+	fileLock := f + ".lock"
+
+	kicbaseArch := runtime.GOARCH
+	if kicbaseArch == "arm" {
+		kicbaseArch = "armv7"
+	}
+
+	releaser, err := lockDownload(fileLock)
+	if err != nil {
+		return "", err
+	}
+	if releaser != nil {
+		defer releaser.Release()
+	}
+	downloadUrl := fmt.Sprintf("https://github.com/kubernetes/minikube/releases/download/%s/%s-%s-%s.tar",
+		version.GetVersion(),
+		img, imgVersion, kicbaseArch)
+	// if we reach here, that means the user cannot have access to any docker registry
+	// this means the user is very likely to have a network issue
+	// downloading from github via http is the last resort, and we should remind the user
+	// that he should at least get access to github
+	// print essential warnings
+	out.WarningT("minikube cannot pull kicbase image from any docker registry, and is trying to download kicbase tarball from github release page via HTTP.")
+	out.Ln("The url to the tarball is %s", downloadUrl)
+	out.WarningT("It's very likely that you have an internet issue. Please ensure that you can access the internet at least via HTTP, directly or with proxy. Currently your proxy configure is:")
+	envs := []string{"HTTP_PROXY", "HTTPS_PROXY", "http_proxy", "https_proxy", "ALL_PROXY", "NO_PROXY"}
+	for _, env := range envs {
+		if v := os.Getenv(env); v != "" {
+			out.Infof("{{.env}}={{.value}}", out.V{"env": env, "value": v})
+		}
+	}
+	out.Ln("")
+
+	// we don't want the tarball to be decompressed
+	// so we pass client options to supress this behavior
+	if err := download(downloadUrl, f, getter.WithDecompressors(map[string]getter.Decompressor{})); err != nil {
+		return "", err
+	}
+	return downloadUrl, nil
+
+}
+
 func parseImage(img string) (*name.Tag, name.Reference, error) {
 
 	var ref name.Reference

pkg/minikube/node/cache.go

@@ -133,12 +133,13 @@ func beginDownloadKicBaseImage(g *errgroup.Group, cc *config.ClusterConfig, down
 			if finalImg != "" {
 				cc.KicBaseImage = finalImg
 				if image.Tag(finalImg) != image.Tag(baseImg) {
-					out.WarningT(fmt.Sprintf("minikube was unable to download %s, but successfully downloaded %s as a fallback image", image.Tag(baseImg), image.Tag(finalImg)))
+					out.WarningT(fmt.Sprintf("minikube was unable to download %s, but successfully downloaded %s as a fallback image", image.Tag(baseImg), finalImg))
 				}
 			}
 		}()
+		// first we try to download the kicbase image (and fall back images) from docker registry
+		var err error
 		for _, img := range append([]string{baseImg}, kic.FallbackImages...) {
-			var err error
 
 			if driver.IsDocker(cc.Driver) && download.ImageExistsInDaemon(img) && !downloadOnly {
 				klog.Infof("%s exists in daemon, skipping load", img)
@@ -167,7 +168,23 @@ func beginDownloadKicBaseImage(g *errgroup.Group, cc *config.ClusterConfig, down
 			}
 			klog.Infof("failed to download %s, will try fallback image if available: %v", img, err)
 		}
-		return fmt.Errorf("failed to download kic base image or any fallback image")
+		// second if we failed to download any fallback image
+		// that means probably all registries are blocked by network issues
+		// we can try to download the image from minikube release page
+		kicbaseVersion := strings.Split(kic.Version, "-")[0]
+		finalImg, err = download.DownloadImageFromGithubToCache("kicbase", kicbaseVersion)
+		if err != nil {
+			klog.Infof("failed to download %s", finalImg)
+			return fmt.Errorf("failed to download kic base image or any fallback image")
+		}
+		klog.Infof("successfully downloaded %s as fall back image", finalImg)
+		if !downloadOnly && driver.IsDocker(cc.Driver) {
+			if finalImg, err = download.CacheToDaemon("kicbase"); err == nil {
+				klog.Infof("successfully loaded and using kicbase from tarball on github")
+			}
+		}
+		return nil
+
 	})
 }