Golang criurpc.CriuCgMode函數代碼示例

//.........這裏部分代碼省略.........
	root := filepath.Join(c.root, "criu-root")
	if err := os.Mkdir(root, 0755); err != nil {
		return err
	}
	defer os.Remove(root)
	root, err = filepath.EvalSymlinks(root)
	if err != nil {
		return err
	}
	err = syscall.Mount(c.config.Rootfs, root, "", syscall.MS_BIND|syscall.MS_REC, "")
	if err != nil {
		return err
	}
	defer syscall.Unmount(root, syscall.MNT_DETACH)
	t := criurpc.CriuReqType_RESTORE
	req := &criurpc.CriuReq{
		Type: &t,
		Opts: &criurpc.CriuOpts{
			ImagesDirFd:    proto.Int32(int32(imageDir.Fd())),
			WorkDirFd:      proto.Int32(int32(workDir.Fd())),
			EvasiveDevices: proto.Bool(true),
			LogLevel:       proto.Int32(4),
			LogFile:        proto.String("restore.log"),
			RstSibling:     proto.Bool(true),
			Root:           proto.String(root),
			ManageCgroups:  proto.Bool(true),
			NotifyScripts:  proto.Bool(true),
			ShellJob:       proto.Bool(criuOpts.ShellJob),
			ExtUnixSk:      proto.Bool(criuOpts.ExternalUnixConnections),
			TcpEstablished: proto.Bool(criuOpts.TcpEstablished),
			FileLocks:      proto.Bool(criuOpts.FileLocks),
			EmptyNs:        proto.Uint32(criuOpts.EmptyNs),
		},
	}

	for _, m := range c.config.Mounts {
		switch m.Device {
		case "bind":
			c.addCriuRestoreMount(req, m)
			break
		case "cgroup":
			binds, err := getCgroupMounts(m)
			if err != nil {
				return err
			}
			for _, b := range binds {
				c.addCriuRestoreMount(req, b)
			}
			break
		}
	}
	for _, iface := range c.config.Networks {
		switch iface.Type {
		case "veth":
			veth := new(criurpc.CriuVethPair)
			veth.IfOut = proto.String(iface.HostInterfaceName)
			veth.IfIn = proto.String(iface.Name)
			req.Opts.Veths = append(req.Opts.Veths, veth)
			break
		case "loopback":
			break
		}
	}
	for _, i := range criuOpts.VethPairs {
		veth := new(criurpc.CriuVethPair)
		veth.IfOut = proto.String(i.HostInterfaceName)
		veth.IfIn = proto.String(i.ContainerInterfaceName)
		req.Opts.Veths = append(req.Opts.Veths, veth)
	}

	// append optional manage cgroups mode
	if criuOpts.ManageCgroupsMode != 0 {
		if err := c.checkCriuVersion("1.7"); err != nil {
			return err
		}
		mode := criurpc.CriuCgMode(criuOpts.ManageCgroupsMode)
		req.Opts.ManageCgroupsMode = &mode
	}

	var (
		fds    []string
		fdJSON []byte
	)
	if fdJSON, err = ioutil.ReadFile(filepath.Join(criuOpts.ImagesDirectory, descriptorsFilename)); err != nil {
		return err
	}

	if err := json.Unmarshal(fdJSON, &fds); err != nil {
		return err
	}
	for i := range fds {
		if s := fds[i]; strings.Contains(s, "pipe:") {
			inheritFd := new(criurpc.InheritFd)
			inheritFd.Key = proto.String(s)
			inheritFd.Fd = proto.Int32(int32(i))
			req.Opts.InheritFd = append(req.Opts.InheritFd, inheritFd)
		}
	}
	return c.criuSwrk(process, req, criuOpts, true)
}

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

	if err := c.checkCriuVersion("1.5.2"); err != nil {
		return err
	}

	if criuOpts.ImagesDirectory == "" {
		return fmt.Errorf("invalid directory to save checkpoint")
	}

	// 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),
		EmptyNs:        proto.Uint32(criuOpts.EmptyNs),
	}

	// 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),
		}
	}

	// append optional manage cgroups mode
	if criuOpts.ManageCgroupsMode != 0 {
		if err := c.checkCriuVersion("1.7"); err != nil {
			return err
		}
		mode := criurpc.CriuCgMode(criuOpts.ManageCgroupsMode)
		rpcOpts.ManageCgroupsMode = &mode
	}

	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
//.........這裏部分代碼省略.........