get last 30 releases of k8s from github

go.mod

@@ -27,6 +27,8 @@ require (
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/google/go-cmp v0.3.1
 	github.com/google/go-containerregistry v0.0.0-20200131185320-aec8da010de2
+	github.com/google/go-github v17.0.0+incompatible
+	github.com/google/go-github/v29 v29.0.3 // indirect
 	github.com/googleapis/gnostic v0.3.0 // indirect
 	github.com/hashicorp/go-getter v1.4.0
 	github.com/hashicorp/go-retryablehttp v0.5.4

go.sum

@@ -335,6 +335,8 @@ github.com/google/go-containerregistry v0.0.0-20200131185320-aec8da010de2 h1:/z0
 github.com/google/go-containerregistry v0.0.0-20200131185320-aec8da010de2/go.mod h1:Wtl/v6YdQxv397EREtzwgd9+Ud7Q5D8XMbi3Zazgkrs=
 github.com/google/go-github v17.0.0+incompatible h1:N0LgJ1j65A7kfXrZnUDaYCs/Sf4rEjNlfyDHW9dolSY=
 github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
+github.com/google/go-github/v29 v29.0.3 h1:IktKCTwU//aFHnpA+2SLIi7Oo9uhAzgsdZNbcAqhgdc=
+github.com/google/go-github/v29 v29.0.3/go.mod h1:CHKiKKPHJ0REzfwc14QMklvtHwCveD0PxlMjLlzAM5E=
 github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/google/gofuzz v0.0.0-20161122191042-44d81051d367/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=

hack/jenkins/minikube_cross_build_and_upload.sh

@@ -41,10 +41,6 @@ docker kill $(docker ps -q) || true
 docker rm $(docker ps -aq) || true
 make -j 16 all && failed=$? || failed=$?  
 
-echo "Running preloaded images release script..."
-make upload-preloaded-images-tar
-
-
 "out/minikube-$(go env GOOS)-$(go env GOARCH)" version
 
 gsutil cp "gs://${bucket}/logs/index.html" \

hack/preload-images/kubernetes.go

@@ -0,0 +1,40 @@
+/*
+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 main
+
+import (
+	"context"
+
+	"github.com/golang/glog"
+	"github.com/google/go-github/github"
+)
+
+// RecentK8sVersions returns the most recent k8s version, usually around 30
+func RecentK8sVersions() ([]string, error) {
+	client := github.NewClient(nil)
+	k8s := "kubernetes"
+	list, _, err := client.Repositories.ListReleases(context.Background(), k8s, k8s, &github.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+	var releases []string
+	for _, r := range list {
+		releases = append(releases, r.GetTagName())
+	}
+	glog.Infof("Got releases: %v", releases)
+	return releases, nil
+}

hack/preload-images/preload_images.go

@@ -22,7 +22,6 @@ import (
 	"os/exec"
 	"strings"
 
-	"k8s.io/minikube/pkg/minikube/constants"
 	"k8s.io/minikube/pkg/minikube/download"
 	"k8s.io/minikube/pkg/minikube/exit"
 )
@@ -36,17 +35,17 @@ var (
 	dockerStorageDriver     = "overlay2"
 	preloadedTarballVersion = "v1"
 	containerRuntimes       = []string{"docker"}
-	kubernetesVersions      = []string{
-		constants.OldestKubernetesVersion,
-		constants.DefaultKubernetesVersion,
-		constants.NewestKubernetesVersion,
-	}
 )
 
 func main() {
 	if err := verifyDockerStorage(); err != nil {
 		exit.WithError("Docker storage type is incompatible: %v\n", err)
 	}
+	kubernetesVersions, err := RecentK8sVersions()
+	if err != nil {
+		exit.WithError("Unable to get recent k8s versions: %v\n", err)
+	}
+
 	for _, kubernetesVersion := range kubernetesVersions {
 		for _, cr := range containerRuntimes {
 			tf := tarballFilename(kubernetesVersion, cr)