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feat(autok3s): support airgap install k3s
When creating or upgrading cluster, you can specify the packageName or packagePath to use airgap install.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,285 @@ | ||
| package airgap | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| "sync" | ||
|
|
||
| "github.com/cnrancher/autok3s/pkg/common" | ||
| "github.com/cnrancher/autok3s/pkg/hosts" | ||
| "github.com/cnrancher/autok3s/pkg/settings" | ||
| "github.com/cnrancher/autok3s/pkg/types" | ||
|
|
||
| "github.com/pkg/errors" | ||
| "github.com/pkg/sftp" | ||
| "github.com/sirupsen/logrus" | ||
| "golang.org/x/crypto/ssh" | ||
| ) | ||
|
|
||
| type fileMap struct { | ||
| mode os.FileMode | ||
| targetPath string | ||
| } | ||
|
|
||
| const ( | ||
| installScriptName = "install.sh" | ||
| ) | ||
|
|
||
| var ( | ||
| errArchNotSupport = errors.New("arch not support") | ||
| unameCommand = "uname -m" | ||
| remoteTmpDir = "/tmp/autok3s" | ||
| // mapping file kind to real filename in remote host | ||
| remoteFileMap = map[string]fileMap{ | ||
| "k3s": { | ||
| mode: 0755, | ||
| targetPath: "/usr/local/bin", | ||
| }, | ||
| "k3s-airgap-images": { | ||
| mode: 0644, | ||
| targetPath: "/var/lib/rancher/k3s/agent/images", | ||
| }, | ||
| installScriptName: { | ||
| mode: 0755, | ||
| targetPath: "/usr/local/bin", | ||
| }, | ||
| } | ||
| ) | ||
|
|
||
| func ScpFiles(clusterName string, pkg *common.Package, dialer *hosts.SSHDialer) error { | ||
| conn := dialer.GetClient() | ||
| fieldLogger := logrus.WithFields(logrus.Fields{ | ||
| "cluster": clusterName, | ||
| "component": "airgap", | ||
| }) | ||
| installScript := settings.InstallScript.Get() | ||
| if installScript == "" { | ||
| return errors.New("install script must be configured") | ||
| } | ||
|
|
||
| arch, err := getRemoteArch(conn) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if ok, _ := ValidatedArch[arch]; !ok { | ||
| return errors.Wrapf(errArchNotSupport, "remote server arch: %s", arch) | ||
| } | ||
| if !pkg.Archs.Contains(arch) { | ||
| return fmt.Errorf("%s resource doesn't exist in package %s", arch, packagePath) | ||
| } | ||
|
|
||
| fieldLogger.Infof("Get remote server arch %s", arch) | ||
| files, err := getScpFileMap(arch, pkg) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| scpClient, err := sftp.NewClient(conn) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer scpClient.Close() | ||
|
|
||
| fieldLogger.Infof("connected to remote server %s with sftp", conn.RemoteAddr()) | ||
|
|
||
| //scp files to tmp dir | ||
| tmpDir := getRemoteTmpDir(clusterName) | ||
| if err := scpClient.MkdirAll(tmpDir); err != nil { | ||
| return err | ||
| } | ||
| defer scpClient.RemoveDirectory(tmpDir) | ||
|
|
||
| for local, remote := range files { | ||
| filename := filepath.Base(local) | ||
| remoteFileName := filepath.Join(tmpDir, filename) | ||
| var source io.Reader | ||
| if local == installScriptName { | ||
| source = bytes.NewBufferString(installScript) | ||
| } else { | ||
| fp, err := os.Open(local) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer fp.Close() | ||
| source = fp | ||
| } | ||
| rfp, err := scpClient.Create(remoteFileName) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer rfp.Close() | ||
| fieldLogger.Infof("local file %s", local) | ||
| fieldLogger.Infof("copy to remote %s", remoteFileName) | ||
| if _, err := io.Copy(rfp, source); err != nil { | ||
| return err | ||
| } | ||
| fieldLogger.Infof("setting file %s mode, %s", filename, remote.mode) | ||
| if err := scpClient.Chmod(remoteFileName, remote.mode); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| targetFilename := filepath.Join(remote.targetPath, filename) | ||
| var stdout, stderr bytes.Buffer | ||
| dialer = dialer.SetStdio(&stdout, &stderr, nil) | ||
| moveCMD := fmt.Sprintf("sudo mkdir -p %s;sudo mv %s %s", remote.targetPath, remoteFileName, targetFilename) | ||
| fieldLogger.Infof("executing cmd in remote server %s", moveCMD) | ||
| if err := dialer.Cmd(moveCMD).Run(); err != nil { | ||
| fieldLogger.Errorf("failed to execute cmd %s, stdout: %s, stderr: %s, %v", moveCMD, stdout.String(), stderr.String(), err) | ||
| return err | ||
| } | ||
| fieldLogger.Infof("file moved to %s", targetFilename) | ||
| fieldLogger.Infof("remote file %s transferred", filename) | ||
| } | ||
|
|
||
| fieldLogger.Info("all files transferred") | ||
| return nil | ||
| } | ||
|
|
||
| func PreparePackage(cluster *types.Cluster) (*common.Package, error) { | ||
| clusterName := cluster.Name | ||
| packageName := cluster.PackageName | ||
| packagePath := cluster.PackagePath | ||
|
|
||
| if packageName == "" && packagePath == "" { | ||
| return nil, nil | ||
| } | ||
|
|
||
| if packagePath == "" && packageName != "" { | ||
| pkgs, err := common.DefaultDB.ListPackages(&packageName) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &pkgs[0], nil | ||
| } | ||
|
|
||
| fieldLogger := logrus.WithFields(logrus.Fields{ | ||
| "cluster": clusterName, | ||
| "component": "airgap", | ||
| }) | ||
| info, err := os.Lstat(packagePath) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| var tmpPath, currentPath string | ||
| if !info.IsDir() { | ||
| tmpPath, err = SaveToTmp(packagePath, "cluster-"+clusterName) | ||
| if err != nil { | ||
| _ = os.RemoveAll(tmpPath) | ||
| return nil, err | ||
| } | ||
| fieldLogger.Infof("created tmp directory %s for package %s, will be removed after", tmpPath, packagePath) | ||
| currentPath = tmpPath | ||
| } else { | ||
| currentPath = packagePath | ||
| } | ||
|
|
||
| rtn, err := VerifyFiles(currentPath) | ||
| if err != nil { | ||
| if tmpPath != "" { | ||
| _ = os.RemoveAll(currentPath) | ||
| } | ||
| return nil, err | ||
| } | ||
| rtn.FilePath = currentPath | ||
| fieldLogger.Infof("airgap package %s validated", packagePath) | ||
| return rtn, nil | ||
| } | ||
|
|
||
| func getRemoteArch(conn *ssh.Client) (string, error) { | ||
| session, err := conn.NewSession() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer session.Close() | ||
|
|
||
| stdoutPipe, err := session.StdoutPipe() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| stderrPipe, err := session.StderrPipe() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| outWriter := bytes.NewBuffer([]byte{}) | ||
| errWriter := bytes.NewBuffer([]byte{}) | ||
|
|
||
| wg := sync.WaitGroup{} | ||
|
|
||
| wg.Add(1) | ||
| go func() { | ||
| _, _ = io.Copy(outWriter, stdoutPipe) | ||
| wg.Done() | ||
| }() | ||
|
|
||
| wg.Add(1) | ||
| go func() { | ||
| _, _ = io.Copy(errWriter, stderrPipe) | ||
| wg.Done() | ||
| }() | ||
|
|
||
| err = session.Run(unameCommand) | ||
|
|
||
| wg.Wait() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| remoteErr := errWriter.String() | ||
| if remoteErr != "" { | ||
| return "", fmt.Errorf("got errors from remote server, %s", remoteErr) | ||
| } | ||
| bufferReader := bufio.NewReader(outWriter) | ||
| line, _, err := bufferReader.ReadLine() | ||
| if err != nil && err != io.EOF { | ||
| return "", err | ||
| } else if err == io.EOF { | ||
| line = []byte{} | ||
| } | ||
| return parseUnameArch(string(line)), nil | ||
| } | ||
|
|
||
| func parseUnameArch(output string) string { | ||
| switch output { | ||
| case "x86_64": | ||
| return "amd64" | ||
| case "aarh64": | ||
| return "arm64" | ||
| case "armv7l": | ||
| return "arm" | ||
| default: | ||
| return output | ||
| } | ||
| } | ||
|
|
||
| // getScpFileMap will return the local file path for specific arch to target file map | ||
| func getScpFileMap(arch string, pkg *common.Package) (map[string]fileMap, error) { | ||
| var rtn = make(map[string]fileMap, len(remoteFileMap)) | ||
| archBasePath := filepath.Join(pkg.FilePath, arch) | ||
| for key, file := range remoteFileMap { | ||
| if key == installScriptName { | ||
| rtn[installScriptName] = file | ||
| continue | ||
| } | ||
| hasFile := false | ||
| for _, suffix := range resourceSuffixes[key] { | ||
| filename := filepath.Join(archBasePath, key+suffix) | ||
| if _, err := os.Lstat(filename); err != nil { | ||
| continue | ||
| } | ||
| hasFile = true | ||
| rtn[filename] = file | ||
| } | ||
| if !hasFile { | ||
| return nil, fmt.Errorf("resource file %s is missing in package %s", key, pkg.FilePath) | ||
| } | ||
| } | ||
| return rtn, nil | ||
| } | ||
|
|
||
| func getRemoteTmpDir(clustername string) string { | ||
| return filepath.Join(remoteTmpDir, clustername) | ||
| } |
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