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
}
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
}