101 lines
2.8 KiB
Go
101 lines
2.8 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"bytes"
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"flag"
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"fmt"
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"os/exec"
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"strings"
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"k8s.io/minikube/pkg/minikube/download"
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"k8s.io/minikube/pkg/minikube/exit"
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)
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const (
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profile = "generate-preloaded-images-tar"
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minikubePath = "out/minikube"
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)
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var (
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dockerStorageDriver = "overlay2"
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containerRuntimes = []string{"docker"}
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k8sVersion string
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k8sVersions []string
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)
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func init() {
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flag.StringVar(&k8sVersion, "kubernetes-version", "", "desired kubernetes version, for example `v1.17.2`")
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flag.Parse()
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if k8sVersion != "" {
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k8sVersions = append(k8sVersions, k8sVersion)
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}
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}
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func main() {
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if err := verifyDockerStorage(); err != nil {
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exit.WithError("Docker storage type is incompatible: %v\n", err)
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}
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if k8sVersions == nil {
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var err error
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k8sVersions, err = RecentK8sVersions()
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if err != nil {
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exit.WithError("Unable to get recent k8s versions: %v\n", err)
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}
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}
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for _, kv := range k8sVersions {
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for _, cr := range containerRuntimes {
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tf := download.TarballName(kv)
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if tarballExists(tf) {
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fmt.Printf("A preloaded tarball for k8s version %s already exists, skipping generation.\n", kv)
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continue
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}
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fmt.Printf("A preloaded tarball for k8s version %s doesn't exist, generating now...\n", kv)
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if err := generateTarball(kv, tf); err != nil {
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exit.WithError(fmt.Sprintf("generating tarball for k8s version %s with %s", kv, cr), err)
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}
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if err := uploadTarball(tf); err != nil {
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exit.WithError(fmt.Sprintf("uploading tarball for k8s version %s with %s", kv, cr), err)
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}
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}
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}
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}
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func tarballExists(tarballFilename string) bool {
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fmt.Println("Checking if tarball already exists...")
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gcsPath := fmt.Sprintf("gs://%s/%s", download.PreloadBucket, tarballFilename)
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cmd := exec.Command("gsutil", "stat", gcsPath)
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return cmd.Run() == nil
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}
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func verifyDockerStorage() error {
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cmd := exec.Command("docker", "info", "-f", "{{.Info.Driver}}")
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var stderr bytes.Buffer
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cmd.Stderr = &stderr
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output, err := cmd.Output()
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if err != nil {
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return fmt.Errorf("%v: %v:\n%s", cmd.Args, err, stderr.String())
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}
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driver := strings.Trim(string(output), " \n")
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if driver != dockerStorageDriver {
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return fmt.Errorf("docker storage driver %s does not match requested %s", driver, dockerStorageDriver)
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}
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return nil
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}
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