Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use Copy method of vmm Package

Best Syzkaller code snippet using vmm.Copy

vmm.go

Source:vmm.go

...435func (v *VMM) VMLoadFile(containerName string, srcPath string) error {436	if err := v.isManagedRunningContainer(containerName); err != nil {437		return err438	}439	return v.containerCopyFile(srcPath, containerName, HomeDir)440}441// VMUnzipImage unzips a zip file at the imageFile path of the container.442func (v *VMM) VMUnzipImage(containerName string, imageFile string) error {443	if err := v.isManagedRunningContainer(containerName); err != nil {444		return err445	}446	match, _ := regexp.MatchString("^[a-zA-z0-9-_]+\\.zip$", imageFile)447	if !match {448		return errors.New("Failed to unzip due to invalid zip filename \"" + imageFile + "\"")449	}450	log.Printf("Unzip %s in container %s at %s", imageFile, containerName, HomeDir)451	_, err := v.containerExec(containerName, "unzip "+path.Join(HomeDir, imageFile), "vsoc-01")452	return errors.Wrap(err, "containerExec")453}454// VMRemove force removes a container, regardless of whether the VM is running.455func (v *VMM) VMRemove(containerName string) error {456	if _, err := v.isManagedContainer(containerName); err != nil {457		return err458	}459	containerID, err := v.getContainerIDByName(containerName)460	if err != nil {461		return errors.Wrap(err, "no containerID")462	}463	err = v.Client.ContainerRemove(context.Background(), containerID, types.ContainerRemoveOptions{464		Force: true,465		// required since /home/vsoc-01 is mounted as an anonymous volume466		RemoveVolumes: true,467	})468	if err != nil {469		return errors.Wrap(err, "docker: ContainerRemove")470	}471	err = v.KVStore.RemoveContainerConfigs(containerName)472	if err != nil {473		return errors.Wrap(err, "kvstore: ContainerRemove")474	}475	err = os.RemoveAll(path.Join(v.DevicesDir, containerName))476	if err != nil {477		return err478	}479	return nil480}481// VMPrune removes all managed containers of the VMM instance. If there are more than one VMM running482// on the same host, VMPrune only removes containers with the VMM instance's CFPrefix.483func (v *VMM) VMPrune() {484	cfList, _ := v.listCuttlefishContainers()485	for _, c := range cfList {486		err := v.VMRemove(c.Names[0][1:])487		if err != nil {488			log.Printf("VMPrune (%s): failed. reason:%v\n", c.ID[:10], err)489		}490		log.Printf("VMPrune (%s): success\n", c.ID[:10])491	}492}493// VMList lists all managed containers of the VMM instance.494func (v *VMM) VMList() ([]VMItem, error) {495	cfList, err := v.listCuttlefishContainers()496	if err != nil {497		return nil, errors.Wrap(err, "listCuttlefishContainers")498	}499	resp := []VMItem{}500	for _, c := range cfList {501		status, err := v.getVMStatus(c)502		containerName := c.Names[0][1:]503		if err != nil {504			return nil, errors.Wrap(err, "getVMStatus")505		}506		cpuStr := v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_CPU)507		cpu, _ := strconv.Atoi(cpuStr)508		ramStr := v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_RAM)509		ram, _ := strconv.Atoi(ramStr)510		tagsStr := v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_TAGS)511		tags := strings.Split(tagsStr, ",")512		resp = append(resp, VMItem{513			ID:         c.ID,514			Name:       v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_DEVICE_NAME),515			Created:    strconv.FormatInt(c.Created, 10),516			IP:         c.NetworkSettings.Networks[DefaultNetwork].IPAddress,517			Status:     status,518			CFInstance: c.Labels["cf_instance"],519			OSVersion:  v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_AOSP_VERSION),520			CPU:        cpu,521			RAM:        ram,522			Tags:       tags,523			Cmdline:    v.KVStore.GetContainerValueOrEmpty(containerName, CONFIG_KEY_CMDLINE),524		})525	}526	return resp, nil527}528// VMGetAOSPVersion reads the "aosp_version" key of a container config.529func (v *VMM) VMGetAOSPVersion(containerName string) (string, error) {530	return v.KVStore.GetContainerValue(containerName, CONFIG_KEY_AOSP_VERSION)531}532// VMInstallAPK attempts to start an ADB daemon in the container and installs an apkFile on the VM.533// The apkFile should have been placed in the VM's deviceFolder. In the event that an ADB daemon534// is already running, calling startADBDaemon should have no effects.535func (v *VMM) VMInstallAPK(containerName string, apkFile string) error {536	if err := v.isManagedRunningContainer(containerName); err != nil {537		return err538	}539	f := path.Join(v.DevicesDir, containerName, apkFile)540	if _, err := os.Stat(f); os.IsNotExist(err) {541		log.Printf("VMInstallAPK (%s): abort installAPK because %s does not exist", containerName, f)542		return fmt.Errorf("apk file %s does not exist", apkFile)543	}544	// ADB daemon may have been terminated at this point so let's bring it up545	err := v.startADBDaemon(containerName)546	if err != nil {547		return errors.Wrap(err, "startADBDaemon")548	}549	resp, err := v.containerExec(containerName, "adb install \"/data/"+apkFile+"\"", "vsoc-01")550	if err != nil {551		return errors.Wrap(err, "adb install failed")552	}553	if resp.ExitCode != 0 {554		return errors.New("non-zero exit in installAPK: " + resp.errBuffer.String())555	}556	return nil557}558// ContainerAttachToTerminal starts a bash shell in the container and returns a bi-directional stream for the frontend to interact with.559// It's up to the caller to close the hijacked connection by calling types.HijackedResponse.Close.560// It's up to the caller to call KillTerminal() to kill the long running process at exit561func (v *VMM) ContainerAttachToTerminal(containerName string) (ir types.IDResponse, hr types.HijackedResponse, err error) {562	if err := v.isManagedRunningContainer(containerName); err != nil {563		return types.IDResponse{}, types.HijackedResponse{}, err564	}565	log.Printf("ExecAttachToTerminal %s\n", containerName)566	// TODO to do it properly, might need to get terminal dimensions from the front end567	// and dynamically adjust docker's tty dimensions568	// reference: https://github.com/xtermjs/xterm.js/issues/1359569	cmd := []string{"/bin/bash"}570	env := []string{"COLUMNS=`tput cols`", "LINES=`tput lines`"}571	return v.ContainerAttachToProcess(containerName, cmd, env)572}573// ContainerAttachToProcess starts a long running process with TTY and returns a bi-directional stream for the frontend to interact with.574// Notice:575//  - It's up to the caller to close the hijacked connection by calling types.HijackedResponse.Close.576//  - It's up to the caller to call KillTerminal() to kill the long running process at exit. (see reason below)577//578// Explanation: types.HijackedResponse.Close only calls HijackedResponse.Conn.Close() which leaves the process in the579// container to run forever. Moby's implementation of ContainerExecStart only terminates the process when either580// the context is Done or the attached stream returns EOF/error. In our use cases (e.g. bash/tail -f), the only possible581// way to terminate such long running processes by API is through context. However, if we trace ContainerExecAttach,582// Eventually we will end up at...583//584//  // github.com/moby/moby/api/server/router/container/exec.go#L132585//  // Now run the user process in container.586//  // Maybe we should we pass ctx here if we're not detaching?587//  s.backend.ContainerExecStart(context.Background(), ...)588//589// ... which always create a new context.Background(). Apparantly Moby team didn't implement the `maybe` part that allows590// context passing.591func (v *VMM) ContainerAttachToProcess(containerName string, cmd []string, env []string) (ID types.IDResponse, hr types.HijackedResponse, err error) {592	if err := v.isManagedRunningContainer(containerName); err != nil {593		return types.IDResponse{}, types.HijackedResponse{}, err594	}595	ctx := context.Background()596	ir, err := v.Client.ContainerExecCreate(ctx, containerName, types.ExecConfig{597		User:         "vsoc-01",598		AttachStdin:  true,599		AttachStdout: true,600		AttachStderr: true,601		Cmd:          cmd,602		Tty:          true,603		Env:          env,604	})605	if err != nil {606		return types.IDResponse{}, types.HijackedResponse{}, errors.Wrap(err, "docker: failed to create an exec config")607	}608	hijackedResp, err := v.Client.ContainerExecAttach(ctx, ir.ID, types.ExecStartCheck{Detach: false, Tty: true})609	if err != nil {610		return types.IDResponse{}, hijackedResp, errors.Wrap(err, "docker: failed to execute/attach to process")611	}612	return ir, hijackedResp, nil613}614// ContainerKillTerminal kills the bash process after use. To be called after done with the process created by ExecAttachToTerminal().615func (v *VMM) ContainerKillTerminal(containerName string) error {616	if err := v.isManagedRunningContainer(containerName); err != nil {617		return err618	}619	return v.ContainerKillProcess(containerName, "/bin/bash")620}621// ContainerKillProcess kills all process in the given container with the given cmd. To be called after done with the process created by ExecAttachToTTYProcess().622//623// This is an ugly workaround since Moby's exec kill is long overdue (since 2014 https://github.com/moby/moby/pull/41548)624// Unfortunately we have to kill all pids of the same cmd since we can't get the specific terminal's pid in the container's625// pid namespace. This is because when creating a terminal in AttachToTerminal(), ContainerExecCreate only returns626// an execID that links to the spawned process's pid in the HOST pid namespace. We can't directly kill a host process unless627// we run the API server as root, which is undesirable.628func (v *VMM) ContainerKillProcess(containerName string, cmd string) error {629	if err := v.isManagedRunningContainer(containerName); err != nil {630		return err631	}632	process := strings.Split(cmd, " ")[0]633	resp, err := v.containerExec(containerName, fmt.Sprintf("ps -ef | awk '$8==\"%s\" {print $2}'", process), "vsoc-01")634	if err != nil {635		return errors.Wrap(err, "containerExec list process")636	}637	pids := strings.Split(resp.outBuffer.String(), "\n")638	if len(pids) == 0 {639		log.Printf("ContainerKillProcess (%s): 0 process found %s\n", containerName, process)640	}641	for _, pid := range pids {642		if pid != "" {643			_, err := v.containerExec(containerName, fmt.Sprintf("kill %s", pid), "root")644			if err != nil {645				// kill with best effort so just do logging646				log.Printf("ContainerKillProcess (%s): failed to kill %s;%s due to %v\n", containerName, pid, process, err)647				continue648			}649			log.Printf("ContainerKillProcess (%s): killed %s:%s", containerName, pid, process)650		}651	}652	return nil653}654// ContainerTerminalResize resizes the TTY size of a given execID655func (v *VMM) ContainerTerminalResize(execID string, lines uint, cols uint) error {656	return v.Client.ContainerExecResize(context.Background(), execID, types.ResizeOptions{Height: lines, Width: cols})657}658// ContainerListFiles gets a list of files in the given container's path659// Results are of the following format which each line represents a file/folder:660//661//  -rw-r--r--|vsoc-01|vsoc-01|65536|1645183964.5579601750|vbmeta.img662func (v *VMM) ContainerListFiles(containerName string, folder string) ([]string, error) {663	if err := v.isManagedRunningContainer(containerName); err != nil {664		return []string{}, err665	}666	cid, _ := v.getContainerIDByName(containerName)667	folder = path.Clean(folder)668	_, err := v.Client.ContainerStatPath(context.Background(), cid, folder)669	if err != nil {670		return []string{}, err671	}672	resp, err := v.containerExec(containerName, "find "+folder+" -maxdepth 1 -printf \"%M|%u|%g|%s|%A@|%P\n\" | sort -t '|' -k6", "vsoc-01")673	if err != nil || resp.ExitCode != 0 {674		return []string{}, errors.Wrap(err, "containerExec find")675	}676	lines := strings.Split(resp.outBuffer.String(), "\n")677	// remove the last empty line due to split678	return lines[:len(lines)-1], nil679}680// ContainaerFileExists checks if a given file/folder exist in the container.681func (v *VMM) ContainaerFileExists(containerName string, filePath string) error {682	cid, _ := v.getContainerIDByName(containerName)683	_, err := v.Client.ContainerStatPath(context.Background(), cid, filePath)684	return err685}686// ContainerReadFile gets a reader of a file in the container. As per Moby API's design, the file will be in TAR format so687// the caller should use tar.NewReader(reader) to obtain a corresponding tar reader.688// It is up to the caller to close the reader.689func (v *VMM) ContainerReadFile(containerName string, filePath string) (io.ReadCloser, error) {690	if err := v.isManagedRunningContainer(containerName); err != nil {691		return nil, err692	}693	id, err := v.getContainerIDByName(containerName)694	if err != nil {695		return nil, err696	}697	log.Printf("ContainerReadFile (%s): Copying file %s", containerName, filePath)698	// notice the API returns a reader for a TAR archive699	rc, _, err := v.Client.CopyFromContainer(context.TODO(), id, filePath)700	if err != nil {701		return nil, err702	}703	return rc, nil704}705// ContainerUpdateConfig updates a container's config in the local KVStore706func (v *VMM) ContainerUpdateConfig(containerName string, key string, value string) error {707	if err := v.isManagedRunningContainer(containerName); err != nil {708		return err709	}710	return v.KVStore.PutContainterValue(containerName, []KeyValue{{key, value}})711}712// getNextCFInstanceNumber returns the next smallest cf_instance number that have not been assigned.713func (v *VMM) getNextCFInstanceNumber() (int, error) {714	// Here we get all cuttlefish containers from the host's view, regardless of which VMM instance they belong to.715	//716	// listCuttlefishContainers is not used because it filter containers based on v.CFPrefix. In the case that717	// two VMMs are running on the same host (i.e. 1 for dev, 1 for go test), using listCuttlefishContainers will718	// create overlapped cf_instance numbers, which could lead to port conflicts.719	containerList, err := v.Client.ContainerList(context.Background(), types.ContainerListOptions{All: true})720	if err != nil {721		return -1, err722	}723	indexes := []int{}724	cfList := []types.Container{}725	for _, c := range containerList {726		if value, ok := c.Labels["cf_instance"]; ok {727			cfList = append(cfList, c)728			cf_idx, err := strconv.Atoi(value)729			if err != nil {730				return -1, err731			}732			indexes = append(indexes, cf_idx)733		}734	}735	sort.Ints(indexes)736	log.Printf("getNextCFInstanceNumber: num of existing cuttlefish containers: %d - %v\n", len(indexes), indexes)737	if len(indexes) == 0 {738		return 1, nil739	} else if indexes[len(indexes)-1] == len(cfList) {740		// if all assigned cf_instance numbers are continueous so far741		return len(cfList) + 1, nil742	} else {743		// find the smallest available cf_instance number744		i := 1745		for {746			if indexes[i-1] != i {747				return i, nil748			}749			i = i + 1750		}751	}752}753// getContainerCFInstanceNumber reads the cf_instance label of a container.754func (v *VMM) getContainerCFInstanceNumber(containerName string) (int, error) {755	containerJSON, err := v.getContainerJSON(containerName)756	if err != nil {757		return -1, err758	}759	num, err := strconv.Atoi(containerJSON.Config.Labels["cf_instance"])760	if err != nil {761		return -1, err762	}763	return num, nil764}765func (v *VMM) getContainerIP(containerName string) (string, error) {766	containerJSON, err := v.getContainerJSON(containerName)767	if err != nil {768		return "", err769	}770	return containerJSON.NetworkSettings.IPAddress, nil771}772func (v *VMM) getContainerJSON(containerName string) (types.ContainerJSON, error) {773	cid, err := v.getContainerIDByName(containerName)774	if err != nil {775		return types.ContainerJSON{}, err776	}777	return v.Client.ContainerInspect(context.Background(), cid)778}779// startVNCProxy starts a websockify daemon in the container and listens to websocket-based VNC connection on the container port wsPort.780// startVNCProxy assumes the websockify binary exists in the container.781//782// When a cuttlefish VM is created with --start-vnc-server flag, /home/vsoc-01/bin/vnc_server starts to listen783// on 6444 of the `lo` interface. This vnc_server only supports RFB 3.x which isn't compatible with the websocket-based784// protocol of novnc.js. To allow the frontend to access the VNC stream inside of the container, we need to both785// translate RFB to websocket and to listen to a port on the container's `eth0` interface. websockify can do both.786func (v *VMM) startVNCProxy(containerName string) error {787	cfIndex, err := v.getContainerCFInstanceNumber(containerName)788	if err != nil {789		return errors.Wrap(err, "getContainerCFInstanceNumber")790	}791	vncPort := 6444 + cfIndex - 1792	wsPort := 6080 + cfIndex - 1793	resp, err := v.containerExec(containerName, fmt.Sprintf("websockify -D %d 127.0.0.1:%d --log-file websockify.log", wsPort, vncPort), "vsoc-01")794	if err != nil {795		return err796	}797	if resp.ExitCode != 0 {798		return errors.New("non-zero exit code in websockify. output:" + resp.errBuffer.String())799	}800	log.Printf("startVNCProxy (%s): websockify daemon started\n", containerName)801	return nil802}803// startADBDaemon starts an ADB daemon in the container and try connect to the VM.804// The function should be called when VM has booted up and started listening on the adb port.805// The function is safe to be called repeatedly as adb will ignore duplicated connect commands and return "already connected".806func (v *VMM) startADBDaemon(containerName string) error {807	cfIndex, err := v.getContainerCFInstanceNumber(containerName)808	if err != nil {809		return err810	}811	adbPort := 6520 + cfIndex - 1812	ip, err := v.getContainerIP(containerName)813	if err != nil {814		return err815	}816	resp, err := v.containerExec(containerName, fmt.Sprintf("adb connect %s:%d", ip, adbPort), "root")817	if err != nil {818		return err819	}820	if resp.ExitCode != 0 {821		return errors.New("non-zero exit code in adb daemon. stderr:" + resp.errBuffer.String())822	}823	log.Printf("startADBDaemon (%s): connected to %s:%d\n", containerName, ip, adbPort)824	log.Printf("startADBDaemon (%s): stdout:%s\n", containerName, resp.outBuffer.String())825	log.Printf("startADBDaemon (%s): stderr:%s\n", containerName, resp.outBuffer.String())826	return nil827}828func (v *VMM) installTools(containerName string) error {829	resp, err := v.containerExec(containerName, "apt update", "root")830	if err != nil {831		return errors.Wrap(err, "failed to apt update")832	}833	if resp.ExitCode != 0 {834		return errors.New("Failed to apt update. reason:" + resp.errBuffer.String())835	}836	resp, err = v.containerExec(containerName, "apt install -y -qq adb git htop python3-pip iputils-ping less websockify", "root")837	if err != nil {838		return errors.Wrap(err, "failed to execute apt install")839	}840	if resp.ExitCode != 0 {841		return errors.New("Failed to apt install additional tools, reason:" + resp.errBuffer.String())842	}843	resp, err = v.containerExec(containerName, "pip3 install frida-tools", "root")844	if err != nil {845		return err846	}847	if resp.ExitCode != 0 {848		return errors.New("non-zero return when install python packages. reason:" + resp.errBuffer.String())849	}850	return nil851}852func (v *VMM) getContainerIDByName(target string) (containerID string, err error) {853	cfList, err := v.listCuttlefishContainers()854	if err != nil {855		return "", err856	}857	for _, c := range cfList {858		for _, name := range c.Names {859			// docker container names all start with "/"860			prefix := "/" + v.CFPrefix861			if strings.HasPrefix(name, prefix) && strings.Contains(name, target) {862				return c.ID, nil863			}864		}865	}866	return "", errors.New("container not found")867}868// containerCopyFile copies a single file into the container.869// if srcPath isn't a .tar / tar.gz, it will be tar-ed in a temporary folder first870func (v *VMM) containerCopyFile(srcPath string, containerName string, dstPath string) error {871	start := time.Now()872	if strings.HasSuffix(srcPath, ".tar") || strings.HasSuffix(srcPath, ".tar.gz") {873		if err := v.containerCopyTarFile(srcPath, containerName, dstPath); err != nil {874			return errors.Wrap(err, "containerCopyTarFile")875		}876	}877	tmpdir, err := ioutil.TempDir("", "matrisea")878	if err != nil {879		return errors.Wrap(err, "cannot create tmp dir")880	}881	defer os.RemoveAll(tmpdir)882	srcFolder, srcFile := filepath.Split(srcPath)883	cmdStr := fmt.Sprintf("cd %s && tar -cvzf \"%s/%s.tar\" \"%s\"", srcFolder, tmpdir, srcFile, srcFile)884	log.Println(cmdStr)885	// TODO read stderr and always print to console886	cmd := exec.Command("sh", "-c", cmdStr)887	var out bytes.Buffer888	var stderr bytes.Buffer889	cmd.Stdout = &out890	cmd.Stderr = &stderr891	if err := cmd.Run(); err != nil {892		return errors.Wrap(err, "error during tar")893	}894	archive := tmpdir + "/" + srcFile + ".tar"895	if err = v.containerCopyTarFile(archive, containerName, dstPath); err != nil {896		return errors.Wrap(err, "containerCopyTarFile")897	}898	elapsed := time.Since(start)899	log.Printf("containerCopyFile (%s): src:%s dst:%s cost:%s\n", containerName, srcPath, dstPath, elapsed)900	return nil901}902// containerCopyTarFile is a wrapper function of docker's CopyToContainer API where the srcPath must be a tar file903// The API will fail silently if srcPath isn't a tar.904func (v *VMM) containerCopyTarFile(srcPath string, containerName string, dstPath string) error {905	containerID, err := v.getContainerIDByName(containerName)906	if err != nil {907		return err908	}909	archive, err := os.Open(srcPath)910	if err != nil {911		return err912	}913	defer archive.Close()914	err = v.Client.CopyToContainer(context.Background(), containerID, dstPath, bufio.NewReader(archive), types.CopyToContainerOptions{})915	if err != nil {916		return errors.Wrap(err, "docker: CopyToContainer")917	}918	return nil919}920func (v *VMM) containerExec(containerName string, cmd string, user string) (ExecResult, error) {921	return v.containerExecWithContext(context.Background(), containerName, cmd, user)922}923// Execute a command in a container and return the result924// containing stdout, stderr, and exit code. Note:925//  - The function is synchronous926//  - stdin is closed927//928// Adapted from moby's exec implementation929// https://github.com/moby/moby/blob/master/integration/internal/container/exec.go930func (v *VMM) containerExecWithContext(ctx context.Context, containerName string, cmd string, user string) (ExecResult, error) {931	execConfig := types.ExecConfig{932		User:         user,933		AttachStdout: true,934		AttachStderr: true,935		Cmd:          []string{"/bin/sh", "-c", cmd},936	}937	cresp, err := v.Client.ContainerExecCreate(ctx, containerName, execConfig)938	if err != nil {939		return ExecResult{}, errors.Wrap(err, "docker: failed to create an exec config")940	}941	execID := cresp.ID942	aresp, err := v.Client.ContainerExecAttach(ctx, execID, types.ExecStartCheck{})943	if err != nil {944		return ExecResult{}, errors.Wrap(err, "docker: failed to execute/attach to "+cmd)945	}946	defer aresp.Close()947	var outBuf, errBuf bytes.Buffer948	outputDone := make(chan error, 1)949	go func() {950		// StdCopy demultiplexes the stream into two buffers951		_, err = stdcopy.StdCopy(&outBuf, &errBuf, aresp.Reader)952		outputDone <- err953	}()954	select {955	case err := <-outputDone:956		if err != nil {957			return ExecResult{}, err958		}959	case <-ctx.Done():960		return ExecResult{}, errors.Wrap(ctx.Err(), "context done")961	}962	iresp, err := v.Client.ContainerExecInspect(ctx, execID)963	if err != nil {964		return ExecResult{}, errors.Wrap(err, "docker: ContainerExecInspect")965	}966	// Let the caller to handler non-zero exit code.967	return ExecResult{ExitCode: iresp.ExitCode, outBuffer: &outBuf, errBuffer: &errBuf}, nil968}969// listCuttlefishContainers gets a list of managed containers of the VMM instance.970func (v *VMM) listCuttlefishContainers() ([]types.Container, error) {971	containers, err := v.Client.ContainerList(context.Background(), types.ContainerListOptions{All: true})972	if err != nil {973		return nil, err974	}975	cflist := []types.Container{}976	for _, c := range containers {977		if strings.HasPrefix(c.Names[0], "/"+v.CFPrefix) {978			cflist = append(cflist, c)979		}980	}981	return cflist, nil982}983type ExecChannelResult struct {984	resp ExecResult985	err  error986}987// getVMStatus derives a VMStatus, with best-effort, from the container's status and whether launch_cvd is running in the container.988// Due to the concurrency design of the underlying Moby API, if a given container is locked (busy with other requests),989// the returned VMStatus might not accurately reflect the actual status of launch_cvd.990func (v *VMM) getVMStatus(c types.Container) (VMStatus, error) {991	// Create a context that will be canceled in 500ms992	//993	// Many Moby APIs acquires a per-container lock during execution. For example, in Daemon.containerCopy (used by VMM.containerCopyFile):994	// https://github.com/moby/moby/blob/eb9e42a09ee123af1d95bf7d46dd738258fa2109/daemon/archive.go#L390995	// If one of such APIs runs for a long time (e.g. copy a large file from a container), the container's lock996	// can be held long enough that blocks subsequent API calls. Unfortunately, getVMStatus is the one that gets997	// blocked the most because it's used by VMList, one of the hottest code path that gets called by every client998	// every 5 seconds. Hence, to avoid waiting for a container's lock indefinitely, we only try query a container's999	// process list (`ps aux`) for a limited amount of time1000	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)1001	defer cancel()1002	containerName := c.Names[0][1:]1003	// When a container is up, c.Status looks like "Up 2 days"1004	if strings.HasPrefix(c.Status, "Up") {1005		ch := make(chan ExecChannelResult, 1)1006		go func() {1007			// use grep "[x]xxx" technique to prevent grep itself from showing up in the ps result...

cmd.go

Source:cmd.go

...189		spanRootfsMetadata.Finish()190		return 1191	}192	spanRootfsMetadata.Finish()193	spanRootfsCopy := tracer.StartSpan("run-rootfs-copy", opentracing.ChildOf(spanRootfsMetadata.Context()))194	// we do need to copy the rootfs file to a temp directory195	// because the jailer directory indeed links to the target rootfs196	// and changes are persisted197	runRootfs := filepath.Join(cacheDirectory, naming.RootfsFileName)198	if err := utils.CopyFile(resolvedRootfs.HostPath(), runRootfs, utils.RootFSCopyBufferSize); err != nil {199		rootLogger.Error("failed copying requested rootfs to temp build location",200			"source", resolvedRootfs.HostPath(),201			"target", runRootfs,202			"reason", err)203		spanRootfsCopy.SetBaggageItem("error", err.Error())204		spanRootfsCopy.Finish()205		return 1206	}207	spanRootfsCopy.Finish()208	// get the veth interface name and write to also to a file:209	vethIfaceName := naming.GetRandomVethName()210	spanRun.SetTag("ifname", vethIfaceName)211	// don't use resolvedRootfs.HostPath() below this point:212	machineConfig.213		WithDaemonize(commandConfig.Daemonize).214		WithKernelOverride(resolvedKernel.HostPath()).215		WithRootfsOverride(runRootfs)216	vmmLogger := rootLogger.With("vmm-id", jailingFcConfig.VMMID(), "veth-name", vethIfaceName)217	vmmLogger.Info("running VMM",218		"from", commandConfig.From,219		"source-rootfs", machineConfig.RootfsOverride(),220		"jail", jailingFcConfig.JailerChrootDirectory())221	// gather the running vmm metadata:222	runMetadata := &metadata.MDRun{223		Configs: metadata.MDRunConfigs{224			CNI:       cniConfig,225			Jailer:    jailingFcConfig,226			Machine:   machineConfig,227			RunConfig: commandConfig,228		},229		Rootfs:   mdRootfs,230		RunCache: cacheDirectory,231		Type:     metadata.MetadataTypeRun,232	}233	vmmStrategy := configs.DefaultFirectackerStrategy(machineConfig).234		AddRequirements(func() *arbitrary.HandlerPlacement {235			// add this one after the previous one so by he logic,236			// this one will be placed and executed before the first one237			return arbitrary.NewHandlerPlacement(strategy.238				NewMetadataExtractorHandler(rootLogger, runMetadata), firecracker.CreateBootSourceHandlerName)239		})240	spanVMMCreate := tracer.StartSpan("run-vmm-create", opentracing.ChildOf(spanRootfsCopy.Context()))241	vmmProvider := vmm.NewDefaultProvider(cniConfig, jailingFcConfig, machineConfig).242		WithHandlersAdapter(vmmStrategy).243		WithVethIfaceName(vethIfaceName)244	vmmCtx, vmmCancel := context.WithCancel(context.Background())245	cleanup.Add(func() {246		vmmCancel()247	})248	spanVMMCreate.Finish()249	cleanup.Add(func() {250		span := tracer.StartSpan("run-cleanup-jail", opentracing.ChildOf(spanVMMCreate.Context()))251		vmmLogger.Info("cleaning up jail directory")252		if err := os.RemoveAll(jailingFcConfig.JailerChrootDirectory()); err != nil {253			vmmLogger.Error("jail directory removal status", "error", err)254			span.SetBaggageItem("error", err.Error())...

vmm_webhook_test.go

Source:vmm_webhook_test.go

...38		vmm: validVMM,39		vm:  validVM,40	}, {41		vmm: func() *virtv1alpha1.VirtualMachineMigration {42			vmm := validVMM.DeepCopy()43			vmm.Spec.VMName = ""44			return vmm45		}(),46		vm: validVM,47	}, {48		vmm: validVMM,49		vm: func() *virtv1alpha1.VirtualMachine {50			vm := validVM.DeepCopy()51			vm.Status.Conditions[0].Status = metav1.ConditionFalse52			vm.Status.Conditions[0].Message = "VM with containerDisk is not migratable"53			return vm54		}(),55		invalidDetail: "VM with containerDisk is not migratable",56	}, {57		vmm: validVMM,58		vm: func() *virtv1alpha1.VirtualMachine {59			vm := validVM.DeepCopy()60			vm.Status.Conditions = []metav1.Condition{}61			return vm62		}(),63		invalidDetail: "VM migratable condition status is unknown",64	}}65	for _, tc := range tests {66		c := fake.NewClientBuilder().WithScheme(scheme).WithObjects(tc.vm).Build()67		errs := ValidateVMM(context.Background(), c, tc.vmm, nil)68		for _, err := range errs {69			assert.Contains(t, err.Detail, tc.invalidDetail)70		}71	}72}...

Copy

Using AI Code Generation

1import (2func main() {3	app := cli.NewApp()4	app.Commands = []cli.Command{5		{6			Aliases: []string{"c"},7			Action: func(c *cli.Context) error {8				fmt.Println("copying")9				vmm.Copy()10			},11		},12	}13	err := app.Run(os.Args)14	if err != nil {15		log.Fatal(err)16	}17}18import (19type Vmm struct {20}21func (v Vmm) Copy() {22	fmt.Println("copying")23}24func NewVmm() *Vmm {25	return &Vmm{26	}27}28require (

Copy

Using AI Code Generation

1import (2func main() {3	vmm1.Init()4	vmm1.Set(0, 0, 1)5	vmm1.Set(1, 1, 1)6	vmm1.Set(2, 2, 1)7	vmm1.Set(3, 3, 1)8	vmm1.Set(4, 4, 1)9	vmm1.Set(5, 5, 1)10	vmm1.Set(6, 6, 1)11	vmm1.Set(7, 7, 1)12	vmm1.Set(8, 8, 1)13	vmm1.Set(9, 9, 1)14	vmm1.Set(10, 10, 1)15	vmm1.Set(11, 11, 1)16	vmm1.Set(12, 12, 1)17	vmm1.Set(13, 13, 1)18	vmm1.Set(14, 14, 1)19	vmm1.Set(15, 15, 1)20	vmm1.Set(16, 16, 1)21	vmm1.Set(17, 17, 1)22	vmm1.Set(18, 18, 1)23	vmm1.Set(19, 19, 1)24	vmm1.Set(20, 20, 1)25	vmm1.Set(21, 21, 1)26	vmm1.Set(22, 22, 1)27	vmm1.Set(23, 23, 1)28	vmm1.Set(24, 24, 1)29	vmm1.Set(25, 25, 1)30	vmm1.Set(26, 26, 1)31	vmm1.Set(27, 27, 1)32	vmm1.Set(28, 28, 1)33	vmm1.Set(29, 29, 1)34	vmm1.Set(30, 30, 1)35	vmm1.Set(31, 31, 1)36	vmm1.Set(32, 32, 1)37	vmm1.Set(33, 33, 1)38	vmm1.Set(34, 34, 1)39	vmm1.Set(35,

Copy

Using AI Code Generation

1import (2func main() {3	vmm1 := vmm.NewVmm(5)4	vmm1.Set(0, 1)5	vmm1.Set(1, 2)6	vmm1.Set(2, 3)7	vmm1.Set(3, 4)8	vmm1.Set(4, 5)9	vmm2 := vmm.NewVmm(5)10	vmm2.Copy(vmm1)11	fmt.Println("vmm1 = ", vmm1)12	fmt.Println("vmm2 = ", vmm2)13}

Copy

Using AI Code Generation

1import (2func main() {3	glog.Info("Starting the program")4	vmmobj := vmm.Vmm{}5	vmmobj.Copy()6	glog.Info("Ending the program")7}8import (9func main() {10	glog.Info("Starting the program")11	vmmobj := vmm.Vmm{}12	vmmobj.Copy()13	glog.Info("Ending the program")14}15import (16func main() {17	glog.Info("Starting the program")18	vmmobj := vmm.Vmm{}19	vmmobj.Copy()20	glog.Info("Ending the program")21}22import (23func main() {24	glog.Info("Starting the program")25	vmmobj := vmm.Vmm{}26	vmmobj.Copy()27	glog.Info("Ending the program")28}29import (30func main() {31	glog.Info("Starting the program")32	vmmobj := vmm.Vmm{}33	vmmobj.Copy()34	glog.Info("Ending the program")35}36import (37func main() {

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.