Esempio n. 1
0
func (b *Builder) runContextCommand(args []string, allowRemote bool, allowLocalDecompression bool, cmdName string) error {
	if b.context == nil {
		return fmt.Errorf("No context given. Impossible to use %s", cmdName)
	}

	if len(args) < 2 {
		return fmt.Errorf("Invalid %s format - at least two arguments required", cmdName)
	}

	// Work in daemon-specific filepath semantics
	dest := filepath.FromSlash(args[len(args)-1]) // last one is always the dest

	b.runConfig.Image = b.image

	var infos []copyInfo

	// Loop through each src file and calculate the info we need to
	// do the copy (e.g. hash value if cached).  Don't actually do
	// the copy until we've looked at all src files
	var err error
	for _, orig := range args[0 : len(args)-1] {
		var fi builder.FileInfo
		decompress := allowLocalDecompression
		if urlutil.IsURL(orig) {
			if !allowRemote {
				return fmt.Errorf("Source can't be a URL for %s", cmdName)
			}
			fi, err = b.download(orig)
			if err != nil {
				return err
			}
			defer os.RemoveAll(filepath.Dir(fi.Path()))
			decompress = false
			infos = append(infos, copyInfo{fi, decompress})
			continue
		}
		// not a URL
		subInfos, err := b.calcCopyInfo(cmdName, orig, allowLocalDecompression, true)
		if err != nil {
			return err
		}

		infos = append(infos, subInfos...)
	}

	if len(infos) == 0 {
		return fmt.Errorf("No source files were specified")
	}
	if len(infos) > 1 && !strings.HasSuffix(dest, string(os.PathSeparator)) {
		return fmt.Errorf("When using %s with more than one source file, the destination must be a directory and end with a /", cmdName)
	}

	// For backwards compat, if there's just one info then use it as the
	// cache look-up string, otherwise hash 'em all into one
	var srcHash string
	var origPaths string

	if len(infos) == 1 {
		fi := infos[0].FileInfo
		origPaths = fi.Name()
		if hfi, ok := fi.(builder.Hashed); ok {
			srcHash = hfi.Hash()
		}
	} else {
		var hashs []string
		var origs []string
		for _, info := range infos {
			fi := info.FileInfo
			origs = append(origs, fi.Name())
			if hfi, ok := fi.(builder.Hashed); ok {
				hashs = append(hashs, hfi.Hash())
			}
		}
		hasher := sha256.New()
		hasher.Write([]byte(strings.Join(hashs, ",")))
		srcHash = "multi:" + hex.EncodeToString(hasher.Sum(nil))
		origPaths = strings.Join(origs, " ")
	}

	cmd := b.runConfig.Cmd
	if runtime.GOOS != "windows" {
		b.runConfig.Cmd = stringutils.NewStrSlice("/bin/sh", "-c", fmt.Sprintf("#(nop) %s %s in %s", cmdName, srcHash, dest))
	} else {
		b.runConfig.Cmd = stringutils.NewStrSlice("cmd", "/S", "/C", fmt.Sprintf("REM (nop) %s %s in %s", cmdName, srcHash, dest))
	}
	defer func(cmd *stringutils.StrSlice) { b.runConfig.Cmd = cmd }(cmd)

	if hit, err := b.probeCache(); err != nil {
		return err
	} else if hit {
		return nil
	}

	// Create the Pod
	podId := fmt.Sprintf("buildpod-%s", utils.RandStr(10, "alpha"))
	tempSrcDir := fmt.Sprintf("/var/run/hyper/temp/%s/", podId)
	if err := os.MkdirAll(tempSrcDir, 0755); err != nil {
		glog.Errorf(err.Error())
		return err
	}
	if _, err := os.Stat(tempSrcDir); err != nil {
		glog.Errorf(err.Error())
		return err
	}
	shellDir := fmt.Sprintf("/var/run/hyper/shell/%s/", podId)
	if err := os.MkdirAll(shellDir, 0755); err != nil {
		glog.Errorf(err.Error())
		return err
	}
	copyshell, err1 := os.Create(shellDir + "/exec-copy.sh")
	if err1 != nil {
		glog.Errorf(err1.Error())
		return err1
	}
	fmt.Fprintf(copyshell, "#!/bin/sh\n")

	podString, err := MakeCopyPod(podId, b.image, b.runConfig.WorkingDir, tempSrcDir, dest, shellDir)
	if err != nil {
		return err
	}
	err = b.Hyperdaemon.CreatePod(podId, podString, false)
	if err != nil {
		return err
	}
	// Get the container
	var (
		containerId string = ""
		container   *daemon.Container
	)

	ps, ok := b.Hyperdaemon.PodList.GetStatus(podId)
	if !ok {
		return fmt.Errorf("Cannot find pod %s", podId)
	}
	for _, i := range ps.Containers {
		containerId = i.Id
	}
	container, err = b.Daemon.Get(containerId)
	if err != nil {
		glog.Error(err.Error())
		return err
	}

	/*
		container, _, err := b.docker.Create(b.runConfig, nil)
		if err != nil {
			return err
		}
		defer b.docker.Unmount(container)
	*/
	b.tmpPods[podId] = struct{}{}
	b.tmpContainers[container.ID] = struct{}{}

	comment := fmt.Sprintf("%s %s in %s", cmdName, origPaths, dest)

	// Twiddle the destination when its a relative path - meaning, make it
	// relative to the WORKINGDIR
	if !system.IsAbs(dest) {
		hasSlash := strings.HasSuffix(dest, string(os.PathSeparator))
		dest = filepath.Join(string(os.PathSeparator), filepath.FromSlash(b.runConfig.WorkingDir), dest)

		// Make sure we preserve any trailing slash
		if hasSlash {
			dest += string(os.PathSeparator)
		}
	}

	for _, info := range infos {
		if err := b.docker.Copy(container, tempSrcDir, info.FileInfo, info.decompress); err != nil {
			return err
		}
		if strings.HasSuffix(dest, string(os.PathSeparator)) == true {
			fmt.Fprintf(copyshell, fmt.Sprintf("cp /tmp/src/%s %s\n", info.FileInfo.Name(), filepath.Join(dest, info.FileInfo.Name())))
		} else {
			fmt.Fprintf(copyshell, fmt.Sprintf("cp /tmp/src/%s %s\n", info.FileInfo.Name(), dest))
		}
	}

	fmt.Fprintf(copyshell, "umount /tmp/src/\n")
	fmt.Fprintf(copyshell, "umount /tmp/shell/\n")
	fmt.Fprintf(copyshell, "rm -rf /tmp/shell/\n")
	fmt.Fprintf(copyshell, "rm -rf /tmp/src/\n")
	copyshell.Close()
	// start or replace pod
	vm, ok := b.Hyperdaemon.VmList[b.Name]
	if !ok {
		glog.Warningf("can not find VM(%s)", b.Name)

		bo := &hypervisor.BootConfig{
			CPU:    1,
			Memory: 512,
			Kernel: b.Hyperdaemon.Kernel,
			Initrd: b.Hyperdaemon.Initrd,
			Bios:   b.Hyperdaemon.Bios,
			Cbfs:   b.Hyperdaemon.Cbfs,
			Vbox:   b.Hyperdaemon.VboxImage,
		}

		vm = b.Hyperdaemon.NewVm(b.Name, 1, 512, false, types.VM_KEEP_AFTER_FINISH)

		err = vm.Launch(bo)
		if err != nil {
			return err
		}

		b.Hyperdaemon.AddVm(vm)
	}
	if vm.Status == types.S_VM_IDLE {
		code, cause, err := b.Hyperdaemon.StartPod(podId, "", b.Name, nil, false, false, types.VM_KEEP_AFTER_FINISH, []*hypervisor.TtyIO{})
		if err != nil {
			glog.Errorf("Code is %d, Cause is %s, %s", code, cause, err.Error())
			b.Hyperdaemon.KillVm(b.Name)
			return err
		}
		vm = b.Hyperdaemon.VmList[b.Name]
		// wait for cmd finish
		Status, err := vm.GetResponseChan()
		if err != nil {
			glog.Error(err.Error())
			return err
		}
		defer vm.ReleaseResponseChan(Status)

		var vmResponse *types.VmResponse
		for {
			vmResponse = <-Status
			if vmResponse.VmId == b.Name {
				if vmResponse.Code == types.E_POD_FINISHED {
					glog.Infof("Got E_POD_FINISHED code response")
					break
				}
			}
		}

		pod, ok := b.Hyperdaemon.PodList.Get(podId)
		if !ok {
			return fmt.Errorf("Cannot find pod %s", podId)
		}
		pod.SetVM(b.Name, vm)

		// release pod from VM
		glog.Warningf("start stop pod")
		code, cause, err = b.Hyperdaemon.StopPod(podId, "no")
		if err != nil {
			glog.Errorf("Code is %d, Cause is %s, %s", code, cause, err.Error())
			b.Hyperdaemon.KillVm(b.Name)
			return err
		}
		glog.Warningf("stop pod finish")
	} else {
		glog.Errorf("Vm is not IDLE")
		return fmt.Errorf("Vm is not IDLE")
	}

	if err := b.commit(container.ID, cmd, comment); err != nil {
		return err
	}
	return nil
}
Esempio n. 2
0
// Copy copies/extracts a source FileInfo to a destination path inside a container
// specified by a container object.
// TODO: make sure callers don't unnecessarily convert destPath with filepath.FromSlash (Copy does it already).
// Copy should take in abstract paths (with slashes) and the implementation should convert it to OS-specific paths.
func (d Docker) Copy(c *daemon.Container, destPath string, src builder.FileInfo, decompress bool) error {
	srcPath := src.Path()
	destExists := true
	rootUID, rootGID := d.Daemon.GetRemappedUIDGID()

	// Work in daemon-local OS specific file paths
	destPath = filepath.FromSlash(destPath)

	/*
		dest, err := c.GetResourcePath(destPath)
		if err != nil {
			return err
		}
	*/

	// Preserve the trailing slash
	// TODO: why are we appending another path separator if there was already one?
	if strings.HasSuffix(destPath, string(os.PathSeparator)) || destPath == "." {
		destPath += string(os.PathSeparator)
	}

	destStat, err := os.Stat(destPath)
	if err != nil {
		if !os.IsNotExist(err) {
			logrus.Errorf("Error performing os.Stat on %s. %s", destPath, err)
			return err
		}
		destExists = false
	}

	if src.IsDir() {
		// copy as directory
		if err := d.Archiver.CopyWithTar(srcPath, destPath); err != nil {
			return err
		}
		return fixPermissions(srcPath, destPath, rootUID, rootGID, destExists)
	}
	if decompress {
		// Only try to untar if it is a file and that we've been told to decompress (when ADD-ing a remote file)

		// First try to unpack the source as an archive
		// to support the untar feature we need to clean up the path a little bit
		// because tar is very forgiving.  First we need to strip off the archive's
		// filename from the path but this is only added if it does not end in slash
		tarDest := destPath
		if strings.HasSuffix(tarDest, string(os.PathSeparator)) {
			tarDest = filepath.Dir(destPath)
		}

		// try to successfully untar the orig
		if err := d.Archiver.UntarPath(srcPath, tarDest); err == nil {
			return nil
		} else if err != io.EOF {
			logrus.Debugf("Couldn't untar to %s: %v", tarDest, err)
		}
	}

	// only needed for fixPermissions, but might as well put it before CopyFileWithTar
	if destExists && destStat.IsDir() {
		destPath = filepath.Join(destPath, src.Name())
	}

	if err := idtools.MkdirAllNewAs(filepath.Dir(destPath), 0755, rootUID, rootGID); err != nil {
		return err
	}
	if err := d.Archiver.CopyFileWithTar(srcPath, destPath); err != nil {
		return err
	}

	return fixPermissions(srcPath, destPath, rootUID, rootGID, destExists)
}