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Merge pull request #12084 from Srikrishnabh/master_srikrishnabh
fixes get ETCD version from kubernetes constants #11290
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208
hack/update/kubeadm_constants/update_kubeadm_constants.go
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/* | ||
Copyright 2021 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. | ||
*/ | ||
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package main | ||
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import ( | ||
"bytes" | ||
"context" | ||
"errors" | ||
"flag" | ||
"fmt" | ||
"io" | ||
"net/http" | ||
"os" | ||
"os/exec" | ||
"strings" | ||
"text/template" | ||
"time" | ||
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"golang.org/x/mod/semver" | ||
"k8s.io/klog/v2" | ||
"k8s.io/minikube/hack/update" | ||
"k8s.io/minikube/pkg/minikube/constants" | ||
) | ||
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const ( | ||
// default context timeout | ||
cxTimeout = 300 * time.Second | ||
kubeadmReleaseURL = "https://storage.googleapis.com/kubernetes-release/release/%s/bin/linux/amd64/kubeadm" | ||
kubeadmBinaryName = "kubeadm-linux-amd64-%s" | ||
minikubeConstantsFilePath = "pkg/minikube/constants/constants_kubeadm_images.go" | ||
kubeadmImagesTemplate = ` | ||
{{- range $version, $element := .}} | ||
"{{$version}}": { | ||
{{- range $image, $tag := $element}} | ||
"{{$image}}": "{{$tag}}", | ||
{{- end}} | ||
},{{- end}}` | ||
) | ||
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// Data contains kubeadm Images map | ||
type Data struct { | ||
ImageMap string `json:"ImageMap"` | ||
} | ||
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func main() { | ||
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inputVersion := flag.Lookup("kubernetes-version").Value.String() | ||
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imageVersions := make([]string, 0) | ||
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// set a context with defined timeout | ||
ctx, cancel := context.WithTimeout(context.Background(), cxTimeout) | ||
defer cancel() | ||
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if inputVersion == "latest" { | ||
stableImageVersion, latestImageVersion, err := getK8sVersions(ctx, "kubernetes", "kubernetes") | ||
if err != nil { | ||
klog.Fatal(err) | ||
} | ||
imageVersions = append(imageVersions, stableImageVersion, latestImageVersion) | ||
} else if semver.IsValid(inputVersion) { | ||
imageVersions = append(imageVersions, inputVersion) | ||
} else { | ||
klog.Fatal(errors.New("invalid version")) | ||
} | ||
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for _, imageVersion := range imageVersions { | ||
imageMapString, err := getKubeadmImagesMapString(imageVersion) | ||
if err != nil { | ||
klog.Fatalln(err) | ||
} | ||
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var data Data | ||
schema := map[string]update.Item{ | ||
minikubeConstantsFilePath: { | ||
Replace: map[string]string{}, | ||
}, | ||
} | ||
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majorMinorVersion := semver.MajorMinor(imageVersion) | ||
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if _, ok := constants.KubeadmImages[majorMinorVersion]; !ok { | ||
data = Data{ImageMap: imageMapString} | ||
schema[minikubeConstantsFilePath].Replace[`KubeadmImages = .*`] = | ||
`KubeadmImages = map[string]map[string]string{ {{.ImageMap}}` | ||
} else { | ||
data = Data{ImageMap: strings.TrimLeft(imageMapString, "\n")} | ||
versionIdentifier := fmt.Sprintf(`"%s": {[^}]+},`, majorMinorVersion) | ||
schema[minikubeConstantsFilePath].Replace[versionIdentifier] = "{{.ImageMap}}" | ||
} | ||
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update.Apply(ctx, schema, data, "", "", -1) | ||
} | ||
} | ||
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func getKubeadmImagesMapString(version string) (string, error) { | ||
url := fmt.Sprintf(kubeadmReleaseURL, version) | ||
fileName := fmt.Sprintf(kubeadmBinaryName, version) | ||
if err := downloadFile(url, fileName); err != nil { | ||
klog.Errorf("failed to download kubeadm binary %s", err.Error()) | ||
return "", err | ||
} | ||
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kubeadmCommand := fmt.Sprintf("./%s", fileName) | ||
args := []string{"config", "images", "list"} | ||
imageListString, err := executeCommand(kubeadmCommand, args...) | ||
if err != nil { | ||
klog.Errorf("failed to execute kubeadm command %s", kubeadmCommand) | ||
return "", err | ||
} | ||
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if err := os.Remove(fileName); err != nil { | ||
klog.Errorf("failed to remove binary %s", fileName) | ||
} | ||
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return formatKubeadmImageList(version, imageListString) | ||
} | ||
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func formatKubeadmImageList(version, data string) (string, error) { | ||
templateData := make(map[string]map[string]string) | ||
majorMinorVersion := semver.MajorMinor(version) | ||
templateData[majorMinorVersion] = make(map[string]string) | ||
lines := strings.Split(data, "\n") | ||
for _, line := range lines { | ||
imageTag := strings.Split(line, ":") | ||
if len(imageTag) == 2 { | ||
// removing the repo from image name | ||
imageName := strings.Split(imageTag[0], "/") | ||
imageTag[0] = strings.Join(imageName[1:], "/") | ||
templateData[majorMinorVersion][imageTag[0]] = imageTag[1] | ||
} | ||
} | ||
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imageTemplate := template.New("kubeadmImage") | ||
t, err := imageTemplate.Parse(kubeadmImagesTemplate) | ||
if err != nil { | ||
klog.Errorf("failed to create kubeadm image map template %s", err.Error()) | ||
return "", err | ||
} | ||
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var bytesBuffer bytes.Buffer | ||
if err := t.Execute(&bytesBuffer, &templateData); err != nil { | ||
return "", err | ||
} | ||
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return bytesBuffer.String(), nil | ||
} | ||
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func downloadFile(url, fileName string) error { | ||
file, err := os.Create(fileName) | ||
if err != nil { | ||
return err | ||
} | ||
defer file.Close() | ||
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response, err := http.Get(url) | ||
if err != nil { | ||
return err | ||
} | ||
defer response.Body.Close() | ||
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if response.StatusCode != http.StatusOK { | ||
return fmt.Errorf("non success status code, while downloading file: %s from: %s", fileName, url) | ||
} | ||
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if _, err := io.Copy(file, response.Body); err != nil { | ||
return err | ||
} | ||
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return os.Chmod(fileName, os.ModePerm) | ||
} | ||
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func executeCommand(command string, args ...string) (string, error) { | ||
output, err := exec.Command(command, args...).Output() | ||
if err != nil { | ||
return "", err | ||
} | ||
return string(output), nil | ||
} | ||
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// getK8sVersion returns Kubernetes versions. | ||
func getK8sVersions(ctx context.Context, owner, repo string) (stable, latest string, err error) { | ||
// get Kubernetes versions from GitHub Releases | ||
stable, latest, err = update.GHReleases(ctx, owner, repo) | ||
if err != nil { | ||
return "", "", err | ||
} | ||
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if !semver.IsValid(stable) || !semver.IsValid(latest) { | ||
return "", "", fmt.Errorf("invalid release obtained stable : %s, latest : %s", stable, latest) | ||
} | ||
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return stable, latest, nil | ||
} |
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