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initial fix on update kubeadm images automatically
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hack/update/kubeadm_image_version/update_kubeadm_image_versions.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| /* | ||
| 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. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "errors" | ||
| "flag" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "os" | ||
| "os/exec" | ||
| "strings" | ||
| "text/template" | ||
| "time" | ||
|
|
||
| "golang.org/x/mod/semver" | ||
| "k8s.io/klog/v2" | ||
| "k8s.io/minikube/hack/update" | ||
| "k8s.io/minikube/pkg/minikube/constants" | ||
| ) | ||
|
|
||
| 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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| data := Data{ImageMap: imageMapString} | ||
| schema := map[string]update.Item{ | ||
| minikubeConstantsFilePath: { | ||
| Replace: map[string]string{}, | ||
| }, | ||
| } | ||
|
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| if _, ok := constants.KubeadmImages[imageVersion]; !ok { | ||
| schema[minikubeConstantsFilePath].Replace[`KubeadmImages = .*`] = | ||
| `KubeadmImages = map[string]map[string]string{ {{.ImageMap}}` | ||
| } else { | ||
| versionIdentifier := fmt.Sprintf(`"%s": {[^}]+},`, imageVersion) | ||
| 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 { | ||
| return "", err | ||
| } | ||
|
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| kubeadmCommand := fmt.Sprintf("./%s", fileName) | ||
| args := []string{"config", "images", "list"} | ||
| imageListString, err := executeCommand(kubeadmCommand, args...) | ||
| if err != nil { | ||
| 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) | ||
| templateData[version] = make(map[string]string) | ||
| lines := strings.Split(data, "\n") | ||
| for _, line := range lines { | ||
| imageTag := strings.Split(line, ":") | ||
| if len(imageTag) == 2 { | ||
| templateData[version][imageTag[0]] = imageTag[1] | ||
| } | ||
| } | ||
|
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| imageTemplate := template.New("kubeadmImage") | ||
| t, err := imageTemplate.Parse(kubeadmImagesTemplate) | ||
| if err != nil { | ||
| 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, latestMM, latestP0 string, err error) { | ||
| // get Kubernetes versions from GitHub Releases | ||
| stable, latest, err = update.GHReleases(ctx, owner, repo) | ||
| if err != nil || !semver.IsValid(stable) || !semver.IsValid(latest) { | ||
| return "", "", "", "", err | ||
| } | ||
| latestMM = semver.MajorMinor(latest) | ||
| latestP0 = latestMM + ".0" | ||
| if semver.Compare(stable, latestP0) == -1 { | ||
| latestP0 = latest | ||
| } | ||
| return stable, latest, latestMM, latestP0, nil | ||
| } |
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