Example #1
0
func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
	c.m.Lock()
	defer c.m.Unlock()

	if err := c.checkCriuVersion(); err != nil {
		return err
	}

	if criuOpts.ImagesDirectory == "" {
		criuOpts.ImagesDirectory = filepath.Join(c.root, "criu.image")
	}

	// Since a container can be C/R'ed multiple times,
	// the checkpoint directory may already exist.
	if err := os.Mkdir(criuOpts.ImagesDirectory, 0755); err != nil && !os.IsExist(err) {
		return err
	}

	if criuOpts.WorkDirectory == "" {
		criuOpts.WorkDirectory = filepath.Join(c.root, "criu.work")
	}

	if err := os.Mkdir(criuOpts.WorkDirectory, 0755); err != nil && !os.IsExist(err) {
		return err
	}

	workDir, err := os.Open(criuOpts.WorkDirectory)
	if err != nil {
		return err
	}
	defer workDir.Close()

	imageDir, err := os.Open(criuOpts.ImagesDirectory)
	if err != nil {
		return err
	}
	defer imageDir.Close()

	rpcOpts := criurpc.CriuOpts{
		ImagesDirFd:    proto.Int32(int32(imageDir.Fd())),
		WorkDirFd:      proto.Int32(int32(workDir.Fd())),
		LogLevel:       proto.Int32(4),
		LogFile:        proto.String("dump.log"),
		Root:           proto.String(c.config.Rootfs),
		ManageCgroups:  proto.Bool(true),
		NotifyScripts:  proto.Bool(true),
		Pid:            proto.Int32(int32(c.initProcess.pid())),
		ShellJob:       proto.Bool(criuOpts.ShellJob),
		LeaveRunning:   proto.Bool(criuOpts.LeaveRunning),
		TcpEstablished: proto.Bool(criuOpts.TcpEstablished),
		ExtUnixSk:      proto.Bool(criuOpts.ExternalUnixConnections),
		FileLocks:      proto.Bool(criuOpts.FileLocks),
	}

	// append optional criu opts, e.g., page-server and port
	if criuOpts.PageServer.Address != "" && criuOpts.PageServer.Port != 0 {
		rpcOpts.Ps = &criurpc.CriuPageServerInfo{
			Address: proto.String(criuOpts.PageServer.Address),
			Port:    proto.Int32(criuOpts.PageServer.Port),
		}
	}

	t := criurpc.CriuReqType_DUMP
	req := &criurpc.CriuReq{
		Type: &t,
		Opts: &rpcOpts,
	}

	for _, m := range c.config.Mounts {
		switch m.Device {
		case "bind":
			c.addCriuDumpMount(req, m)
			break
		case "cgroup":
			binds, err := getCgroupMounts(m)
			if err != nil {
				return err
			}
			for _, b := range binds {
				c.addCriuDumpMount(req, b)
			}
			break
		}
	}

	// Write the FD info to a file in the image directory

	fdsJSON, err := json.Marshal(c.initProcess.externalDescriptors())
	if err != nil {
		return err
	}

	err = ioutil.WriteFile(filepath.Join(criuOpts.ImagesDirectory, descriptorsFilename), fdsJSON, 0655)
	if err != nil {
		return err
	}

	err = c.criuSwrk(nil, req, criuOpts, false)
	if err != nil {
		return err
	}
	return nil
}
Example #2
0
func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
	c.m.Lock()
	defer c.m.Unlock()

	if err := c.checkCriuVersion(); err != nil {
		return err
	}

	if criuOpts.ImagesDirectory == "" {
		criuOpts.ImagesDirectory = filepath.Join(c.root, "criu.image")
	}

	// Since a container can be C/R'ed multiple times,
	// the checkpoint directory may already exist.
	if err := os.Mkdir(criuOpts.ImagesDirectory, 0755); err != nil && !os.IsExist(err) {
		return err
	}

	if criuOpts.WorkDirectory == "" {
		criuOpts.WorkDirectory = filepath.Join(c.root, "criu.work")
	}

	if err := os.Mkdir(criuOpts.WorkDirectory, 0755); err != nil && !os.IsExist(err) {
		return err
	}

	workDir, err := os.Open(criuOpts.WorkDirectory)
	if err != nil {
		return err
	}
	defer workDir.Close()

	imageDir, err := os.Open(criuOpts.ImagesDirectory)
	if err != nil {
		return err
	}
	defer imageDir.Close()

	rpcOpts := criurpc.CriuOpts{
		ImagesDirFd:    proto.Int32(int32(imageDir.Fd())),
		WorkDirFd:      proto.Int32(int32(workDir.Fd())),
		LogLevel:       proto.Int32(4),
		LogFile:        proto.String("dump.log"),
		Root:           proto.String(c.config.Rootfs),
		ManageCgroups:  proto.Bool(true),
		NotifyScripts:  proto.Bool(true),
		Pid:            proto.Int32(int32(c.initProcess.pid())),
		ShellJob:       proto.Bool(criuOpts.ShellJob),
		LeaveRunning:   proto.Bool(criuOpts.LeaveRunning),
		TcpEstablished: proto.Bool(criuOpts.TcpEstablished),
		ExtUnixSk:      proto.Bool(criuOpts.ExternalUnixConnections),
	}

	// append optional criu opts, e.g., page-server and port
	if criuOpts.PageServer.Address != "" && criuOpts.PageServer.Port != 0 {
		rpcOpts.Ps = &criurpc.CriuPageServerInfo{
			Address: proto.String(criuOpts.PageServer.Address),
			Port:    proto.Int32(criuOpts.PageServer.Port),
		}
	}

	t := criurpc.CriuReqType_DUMP
	req := criurpc.CriuReq{
		Type: &t,
		Opts: &rpcOpts,
	}

	for _, m := range c.config.Mounts {
		if m.Device == "bind" {
			mountDest := m.Destination
			if strings.HasPrefix(mountDest, c.config.Rootfs) {
				mountDest = mountDest[len(c.config.Rootfs):]
			}

			extMnt := new(criurpc.ExtMountMap)
			extMnt.Key = proto.String(mountDest)
			extMnt.Val = proto.String(mountDest)
			req.Opts.ExtMnt = append(req.Opts.ExtMnt, extMnt)
		}
	}

	// Write the FD info to a file in the image directory

	fdsJSON, err := json.Marshal(c.initProcess.externalDescriptors())
	if err != nil {
		return err
	}

	err = ioutil.WriteFile(filepath.Join(criuOpts.ImagesDirectory, descriptors_filename), fdsJSON, 0655)
	if err != nil {
		return err
	}

	err = c.criuSwrk(nil, &req, criuOpts)
	if err != nil {
		return err
	}
	return nil
}