Exemple #1
0
func CompressStream(dest io.WriteCloser, compression Compression) (io.WriteCloser, error) {
	switch compression {
	case Uncompressed:
		return utils.NopWriteCloser(dest), nil
	case Gzip:
		return gzip.NewWriter(dest), nil
	case Bzip2, Xz:
		// archive/bzip2 does not support writing, and there is no xz support at all
		// However, this is not a problem as docker only currently generates gzipped tars
		return nil, fmt.Errorf("Unsupported compression format %s", (&compression).Extension())
	default:
		return nil, fmt.Errorf("Unsupported compression format %s", (&compression).Extension())
	}
}
Exemple #2
0
func setupBaseImage() {
	eng := newTestEngine(std_log.New(os.Stderr, "", 0), false, unitTestStoreBase)
	job := eng.Job("image_inspect", unitTestImageName)
	img, _ := job.Stdout.AddEnv()
	// If the unit test is not found, try to download it.
	if err := job.Run(); err != nil || img.Get("Id") != unitTestImageID {
		// Retrieve the Image
		job = eng.Job("pull", unitTestImageName)
		job.Stdout.Add(utils.NopWriteCloser(os.Stdout))
		if err := job.Run(); err != nil {
			log.Fatalf("Unable to pull the test image: %s", err)
		}
	}
}
Exemple #3
0
// Job creates a new job which can later be executed.
// This function mimics `Command` from the standard os/exec package.
func (eng *Engine) Job(name string, args ...string) *Job {
	job := &Job{
		Eng:    eng,
		Name:   name,
		Args:   args,
		Stdin:  NewInput(),
		Stdout: NewOutput(),
		Stderr: NewOutput(),
		env:    &Env{},
	}
	if eng.Logging {
		job.Stderr.Add(utils.NopWriteCloser(eng.Stderr))
	}

	// Catchall is shadowed by specific Register.
	if handler, exists := eng.handlers[name]; exists {
		job.handler = handler
	} else if eng.catchall != nil && name != "" {
		// empty job names are illegal, catchall or not.
		job.handler = eng.catchall
	}
	return job
}
Exemple #4
0
// register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) register(container *Container, updateSuffixarray bool) error {
	if container.daemon != nil || daemon.Exists(container.ID) {
		return fmt.Errorf("Container is already loaded")
	}
	if err := validateID(container.ID); err != nil {
		return err
	}
	if err := daemon.ensureName(container); err != nil {
		return err
	}

	container.daemon = daemon

	// Attach to stdout and stderr
	container.stderr = broadcastwriter.New()
	container.stdout = broadcastwriter.New()
	// Attach to stdin
	if container.Config.OpenStdin {
		container.stdin, container.stdinPipe = io.Pipe()
	} else {
		container.stdinPipe = utils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
	}
	// done
	daemon.containers.Add(container.ID, container)

	// don't update the Suffixarray if we're starting up
	// we'll waste time if we update it for every container
	daemon.idIndex.Add(container.ID)

	// FIXME: if the container is supposed to be running but is not, auto restart it?
	//        if so, then we need to restart monitor and init a new lock
	// If the container is supposed to be running, make sure of it
	if container.State.IsRunning() {
		log.Debugf("killing old running container %s", container.ID)

		existingPid := container.State.Pid
		container.State.SetStopped(0)

		// We only have to handle this for lxc because the other drivers will ensure that
		// no processes are left when docker dies
		if container.ExecDriver == "" || strings.Contains(container.ExecDriver, "lxc") {
			lxc.KillLxc(container.ID, 9)
		} else {
			// use the current driver and ensure that the container is dead x.x
			cmd := &execdriver.Command{
				ID: container.ID,
			}
			var err error
			cmd.Process, err = os.FindProcess(existingPid)
			if err != nil {
				log.Debugf("cannot find existing process for %d", existingPid)
			}
			daemon.execDriver.Terminate(cmd)
		}

		if err := container.Unmount(); err != nil {
			log.Debugf("unmount error %s", err)
		}
		if err := container.ToDisk(); err != nil {
			log.Debugf("saving stopped state to disk %s", err)
		}

		info := daemon.execDriver.Info(container.ID)
		if !info.IsRunning() {
			log.Debugf("Container %s was supposed to be running but is not.", container.ID)

			log.Debugf("Marking as stopped")

			container.State.SetStopped(-127)
			if err := container.ToDisk(); err != nil {
				return err
			}
		}
	}
	return nil
}