Esempio n. 1
0
func (cmd) Execute(arguments map[string]interface{}) bool {
	// Read arguments
	imageFile := arguments["<image>"].(string)
	command := arguments["<command>"].([]string)
	vnc := arguments["--vnc"].(bool)

	// Create temporary storage and environment
	storage, err := runtime.NewTemporaryStorage(os.TempDir())
	if err != nil {
		panic("Failed to create TemporaryStorage")
	}
	environment := &runtime.Environment{
		TemporaryStorage: storage,
	}

	// Create a temporary folder
	tempFolder := filepath.Join("/tmp", slugid.Nice())
	if err = os.Mkdir(tempFolder, 0777); err != nil {
		log.Fatal("Failed to create temporary folder in /tmp, error: ", err)
	}

	// Create the necessary runtime setup
	gc := &gc.GarbageCollector{}
	logger, _ := runtime.CreateLogger("info")
	log := logger.WithField("component", "qemu-run")

	// Create image manager
	log.Info("Creating image manager")
	manager, err := image.NewManager(filepath.Join(tempFolder, "/images/"), gc, logger.WithField("component", "image-manager"), nil)
	if err != nil {
		log.Fatal("Failed to create image manager", err)
	}

	// Get an instance of the image
	log.Info("Creating instance of image")
	image, err := manager.Instance("image", func(target string) error {
		return cp.CopyFile(target, imageFile)
	})
	if err != nil {
		log.Fatal("Failed to create instance of image, error: ", err)
	}

	// Setup a user-space network
	log.Info("Creating user-space network")
	net, err := network.NewUserNetwork(tempFolder)
	if err != nil {
		log.Fatal("Failed to create user-space network, error: ", err)
	}

	// Create virtual machine
	log.Info("Creating virtual machine")
	vm, err := vm.NewVirtualMachine(
		image.Machine().Options(), image, net, tempFolder,
		"", "", logger.WithField("component", "vm"),
	)
	if err != nil {
		log.Fatal("Failed to create virtual-machine, error: ", err)
	}

	// Create meta-data service
	log.Info("Creating meta-data service")
	var shellServer *interactive.ShellServer
	var displayServer *interactive.DisplayServer
	ms := metaservice.New(command, make(map[string]string), os.Stdout, func(result bool) {
		fmt.Println("### Task Completed, result = ", result)
		shellServer.WaitAndClose()
		displayServer.Abort()
		vm.Kill()
	}, environment)

	// Setup http handler for network
	vm.SetHTTPHandler(ms)

	// Create ShellServer
	shellServer = interactive.NewShellServer(
		ms.ExecShell, log.WithField("component", "shell-server"),
	)

	// Create displayServer
	displayServer = interactive.NewDisplayServer(
		&socketDisplayProvider{socket: vm.VNCSocket()},
		log.WithField("component", "display-server"),
	)

	interactiveHandler := http.NewServeMux()
	interactiveHandler.Handle("/shell/", shellServer)
	interactiveHandler.Handle("/display/", displayServer)
	interactiveServer := graceful.Server{
		Timeout: 30 * time.Second,
		Server: &http.Server{
			Addr:    "localhost:8080",
			Handler: interactiveHandler,
		},
		NoSignalHandling: true,
	}
	go interactiveServer.ListenAndServe()

	// Start the virtual machine
	log.Info("Start the virtual machine")
	vm.Start()

	// Start vncviewer
	done := make(chan struct{})
	if vnc {
		go StartVNCViewer(vm.VNCSocket(), done)
	}

	// Wait for SIGINT/SIGKILL or vm.Done
	c := make(chan os.Signal, 2)
	signal.Notify(c, os.Interrupt, os.Kill) // This pattern leaks, acceptable here
	select {
	case <-c:
		signal.Stop(c)
		fmt.Println("### Terminating QEMU")
		vm.Kill()
	case <-vm.Done:
		fmt.Println("### QEMU terminated")
	}
	close(done)

	// Ensure that QEMU has terminated before we continue
	<-vm.Done
	interactiveServer.Stop(100 * time.Millisecond)

	// Clean up anything left in the garbage collector
	gc.CollectAll()
	return true
}
func buildImage(
	log *logrus.Entry,
	inputFile, outputFile string,
	fromImage, novnc bool,
	boot,
	cdrom string,
	size int,
) error {
	// Find absolute outputFile
	outputFile, err := filepath.Abs(outputFile)
	if err != nil {
		log.Error("Failed to resolve output file, error: ", err)
		return err
	}

	// Create temp folder for the image
	tempFolder, err := ioutil.TempDir("", "taskcluster-worker-build-image-")
	if err != nil {
		log.Error("Failed to create temporary folder, error: ", err)
		return err
	}
	defer os.RemoveAll(tempFolder)

	var img *image.MutableImage
	if !fromImage {
		// Read machine definition
		machine, err2 := vm.LoadMachine(inputFile)
		if err2 != nil {
			log.Error("Failed to load machine file from ", inputFile, " error: ", err2)
			return err2
		}

		// Construct MutableImage
		log.Info("Creating MutableImage")
		img, err2 = image.NewMutableImage(tempFolder, int(size), machine)
		if err2 != nil {
			log.Error("Failed to create image, error: ", err2)
			return err2
		}
	} else {
		img, err = image.NewMutableImageFromFile(inputFile, tempFolder)
		if err != nil {
			log.Error("Failed to load image, error: ", err)
			return err
		}
	}

	// Create temp folder for sockets
	socketFolder, err := ioutil.TempDir("", "taskcluster-worker-sockets-")
	if err != nil {
		log.Error("Failed to create temporary folder, error: ", err)
		return err
	}
	defer os.RemoveAll(socketFolder)

	// Setup a user-space network
	log.Info("Creating user-space network")
	net, err := network.NewUserNetwork(tempFolder)
	if err != nil {
		log.Error("Failed to create user-space network, error: ", err)
		return err
	}

	// Setup logService so that logs can be posted to meta-service at:
	// http://169.254.169.254/v1/log
	net.SetHandler(&logService{Destination: os.Stdout})

	// Create virtual machine
	log.Info("Creating virtual machine")
	vm, err := vm.NewVirtualMachine(img.Machine().Options(), img, net, socketFolder, boot, cdrom, log.WithField("component", "vm"))
	if err != nil {
		log.Error("Failed to recreated virtual-machine, error: ", err)
		return err
	}

	// Start the virtual machine
	log.Info("Starting virtual machine")
	vm.Start()

	// Open VNC display
	if !novnc {
		go qemurun.StartVNCViewer(vm.VNCSocket(), vm.Done)
	}

	// Wait for interrupt to gracefully kill everything
	interrupted := make(chan os.Signal, 1)
	signal.Notify(interrupted, os.Interrupt)

	// Wait for virtual machine to be done, or we get interrupted
	select {
	case <-interrupted:
		vm.Kill()
		err = errors.New("SIGINT received, aborting virtual machine")
	case <-vm.Done:
		err = vm.Error
	}
	<-vm.Done
	signal.Stop(interrupted)
	defer img.Dispose()

	if err != nil {
		if e, ok := err.(*exec.ExitError); ok {
			log.Error("QEMU error: ", string(e.Stderr))
		}
		log.Info("Error running virtual machine: ", err)
		return err
	}

	// Package up the finished image
	log.Info("Package virtual machine image")
	err = img.Package(outputFile)
	if err != nil {
		log.Error("Failed to package finished image, error: ", err)
		return err
	}

	return nil
}