Esempio n. 1
0
func (t *TtyConsole) attach(command *execdriver.Command, pipes *execdriver.Pipes) error {
	command.Stdout = t.slave
	command.Stderr = t.slave
	command.Console = t.slave.Name()

	go func() {
		if wb, ok := pipes.Stdout.(interface {
			CloseWriters() error
		}); ok {
			defer wb.CloseWriters()
		}
		io.Copy(pipes.Stdout, t.master)
	}()

	if pipes.Stdin != nil {
		command.Stdin = t.slave
		command.SysProcAttr.Setctty = true

		go func() {
			defer pipes.Stdin.Close()
			io.Copy(t.master, pipes.Stdin)
		}()
	}
	return nil
}
Esempio n. 2
0
func (d *driver) Run(c *execdriver.Command, startCallback execdriver.StartCallback) (int, error) {
	params := []string{
		"chroot",
		c.Rootfs,
		"/.dockerinit",
		"-driver",
		DriverName,
	}
	params = append(params, c.Entrypoint)
	params = append(params, c.Arguments...)

	var (
		name = params[0]
		arg  = params[1:]
	)
	aname, err := exec.LookPath(name)
	if err != nil {
		aname = name
	}
	c.Path = aname
	c.Args = append([]string{name}, arg...)

	if err := c.Start(); err != nil {
		return -1, err
	}

	if startCallback != nil {
		startCallback(c)
	}

	err = c.Wait()
	return c.GetExitCode(), err
}
Esempio n. 3
0
func (d *driver) Restore(c *execdriver.Command) error {
	var nspid int
	f, err := os.Open(filepath.Join(d.root, c.ID, "pid"))
	if err != nil {
		return err
	}
	defer d.removeContainerRoot(c.ID)

	if _, err := fmt.Fscanf(f, "%d", &nspid); err != nil {
		f.Close()
		return err
	}
	f.Close()

	if _, err := os.FindProcess(nspid); err != nil {
		return fmt.Errorf("finding existing pid %d %s", nspid, err)
	}
	c.Process = &os.Process{
		Pid: nspid,
	}
	ticker := time.NewTicker(500 * time.Millisecond)
	defer ticker.Stop()

	for _ = range ticker.C {
		if err := syscall.Kill(nspid, 0); err != nil {
			if strings.Contains(err.Error(), "no such process") {
				return nil
			}
			return fmt.Errorf("signal error %s", err)
		}
	}
	return nil
}
Esempio n. 4
0
func (s *StdConsole) attach(command *execdriver.Command, pipes *execdriver.Pipes) error {
	command.Stdout = pipes.Stdout
	command.Stderr = pipes.Stderr

	if pipes.Stdin != nil {
		stdin, err := command.StdinPipe()
		if err != nil {
			return err
		}

		go func() {
			defer stdin.Close()
			io.Copy(stdin, pipes.Stdin)
		}()
	}
	return nil
}
Esempio n. 5
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func SetTerminal(command *execdriver.Command, pipes *execdriver.Pipes) error {
	var (
		term execdriver.Terminal
		err  error
	)
	if command.Tty {
		term, err = NewTtyConsole(command, pipes)
	} else {
		term, err = NewStdConsole(command, pipes)
	}
	if err != nil {
		return err
	}
	command.Terminal = term
	return nil
}
Esempio n. 6
0
func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
	if err := d.validateCommand(c); err != nil {
		return -1, err
	}
	var (
		term        nsinit.Terminal
		container   = createContainer(c)
		factory     = &dockerCommandFactory{c: c, driver: d}
		stateWriter = &dockerStateWriter{
			callback: startCallback,
			c:        c,
			dsw:      &nsinit.DefaultStateWriter{filepath.Join(d.root, c.ID)},
		}
		ns   = nsinit.NewNsInit(factory, stateWriter)
		args = append([]string{c.Entrypoint}, c.Arguments...)
	)
	if err := d.createContainerRoot(c.ID); err != nil {
		return -1, err
	}
	defer d.removeContainerRoot(c.ID)

	if c.Tty {
		term = &dockerTtyTerm{
			pipes: pipes,
		}
	} else {
		term = &dockerStdTerm{
			pipes: pipes,
		}
	}
	c.Terminal = term
	if err := d.writeContainerFile(container, c.ID); err != nil {
		return -1, err
	}
	return ns.Exec(container, term, args)
}
Esempio n. 7
0
func (d *driver) Run(c *execdriver.Command, startCallback execdriver.StartCallback) (int, error) {
	configPath, err := d.generateLXCConfig(c)
	if err != nil {
		return -1, err
	}
	params := []string{
		"lxc-start",
		"-n", c.ID,
		"-f", configPath,
		"--",
		c.InitPath,
		"-driver",
		DriverName,
	}

	if c.Network != nil {
		params = append(params,
			"-g", c.Network.Gateway,
			"-i", fmt.Sprintf("%s/%d", c.Network.IPAddress, c.Network.IPPrefixLen),
			"-mtu", strconv.Itoa(c.Network.Mtu),
		)
	}

	if c.User != "" {
		params = append(params, "-u", c.User)
	}

	if c.Privileged {
		if d.apparmor {
			params[0] = path.Join(d.root, "lxc-start-unconfined")

		}
		params = append(params, "-privileged")
	}

	if c.WorkingDir != "" {
		params = append(params, "-w", c.WorkingDir)
	}

	params = append(params, "--", c.Entrypoint)
	params = append(params, c.Arguments...)

	if d.sharedRoot {
		// lxc-start really needs / to be non-shared, or all kinds of stuff break
		// when lxc-start unmount things and those unmounts propagate to the main
		// mount namespace.
		// What we really want is to clone into a new namespace and then
		// mount / MS_REC|MS_SLAVE, but since we can't really clone or fork
		// without exec in go we have to do this horrible shell hack...
		shellString :=
			"mount --make-rslave /; exec " +
				utils.ShellQuoteArguments(params)

		params = []string{
			"unshare", "-m", "--", "/bin/sh", "-c", shellString,
		}
	}

	var (
		name = params[0]
		arg  = params[1:]
	)
	aname, err := exec.LookPath(name)
	if err != nil {
		aname = name
	}
	c.Path = aname
	c.Args = append([]string{name}, arg...)

	if err := c.Start(); err != nil {
		return -1, err
	}

	var (
		waitErr  error
		waitLock = make(chan struct{})
	)
	go func() {
		if err := c.Wait(); err != nil {
			waitErr = err
		}
		close(waitLock)
	}()

	// Poll lxc for RUNNING status
	if err := d.waitForStart(c, waitLock); err != nil {
		return -1, err
	}

	if startCallback != nil {
		startCallback(c)
	}

	<-waitLock

	return c.GetExitCode(), waitErr
}