Esempio n. 1
0
func (b *buildFile) clearTmp(containers map[string]struct{}) {
	for c := range containers {
		tmp := b.runtime.Get(c)
		b.runtime.Destroy(tmp)
		fmt.Fprintf(b.outStream, "Removing intermediate container %s\n", utils.TruncateID(c))
	}
}
Esempio n. 2
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// Test that an image can be deleted by its shorthand prefix
func TestDeletePrefix(t *testing.T) {
	graph, _ := tempGraph(t)
	defer nukeGraph(graph)
	img := createTestImage(graph, t)
	if err := graph.Delete(utils.TruncateID(img.ID)); err != nil {
		t.Fatal(err)
	}
	assertNImages(graph, t, 0)
}
Esempio n. 3
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func TestEnv(t *testing.T) {
	os.Setenv("TRUE", "false")
	os.Setenv("TRICKY", "tri\ncky\n")
	runtime := mkRuntime(t)
	defer nuke(runtime)
	config, _, _, err := docker.ParseRun([]string{"-e=FALSE=true", "-e=TRUE", "-e=TRICKY", GetTestImage(runtime).ID, "env"}, nil)
	if err != nil {
		t.Fatal(err)
	}
	container, _, err := runtime.Create(config, "")
	if err != nil {
		t.Fatal(err)
	}
	defer runtime.Destroy(container)

	stdout, err := container.StdoutPipe()
	if err != nil {
		t.Fatal(err)
	}
	defer stdout.Close()
	if err := container.Start(); err != nil {
		t.Fatal(err)
	}
	container.Wait()
	output, err := ioutil.ReadAll(stdout)
	if err != nil {
		t.Fatal(err)
	}
	actualEnv := strings.Split(string(output), "\n")
	if actualEnv[len(actualEnv)-1] == "" {
		actualEnv = actualEnv[:len(actualEnv)-1]
	}
	sort.Strings(actualEnv)
	goodEnv := []string{
		"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
		"HOME=/",
		"container=lxc",
		"HOSTNAME=" + utils.TruncateID(container.ID),
		"FALSE=true",
		"TRUE=false",
		"TRICKY=tri",
		"cky",
		"",
	}
	sort.Strings(goodEnv)
	if len(goodEnv) != len(actualEnv) {
		t.Fatalf("Wrong environment: should be %d variables, not: '%s'\n", len(goodEnv), strings.Join(actualEnv, ", "))
	}
	for i := range goodEnv {
		if actualEnv[i] != goodEnv[i] {
			t.Fatalf("Wrong environment variable: should be %s, not %s", goodEnv[i], actualEnv[i])
		}
	}
}
Esempio n. 4
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// During cleanup aufs needs to unmount all mountpoints
func (a *Driver) Cleanup() error {
	ids, err := loadIds(path.Join(a.rootPath(), "layers"))
	if err != nil {
		return err
	}
	for _, id := range ids {
		if err := a.unmount(id); err != nil {
			utils.Errorf("Unmounting %s: %s", utils.TruncateID(id), err)
		}
	}
	return nil
}
Esempio n. 5
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// Commit the container <id> with the autorun command <autoCmd>
func (b *buildFile) commit(id string, autoCmd []string, comment string) error {
	if b.image == "" {
		return fmt.Errorf("Please provide a source image with `from` prior to commit")
	}
	b.config.Image = b.image
	if id == "" {
		cmd := b.config.Cmd
		b.config.Cmd = []string{"/bin/sh", "-c", "#(nop) " + comment}
		defer func(cmd []string) { b.config.Cmd = cmd }(cmd)

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

		container, warnings, err := b.runtime.Create(b.config, "")
		if err != nil {
			return err
		}
		for _, warning := range warnings {
			fmt.Fprintf(b.outStream, " ---> [Warning] %s\n", warning)
		}
		b.tmpContainers[container.ID] = struct{}{}
		fmt.Fprintf(b.outStream, " ---> Running in %s\n", utils.TruncateID(container.ID))
		id = container.ID
		if err := container.Mount(); err != nil {
			return err
		}
		defer container.Unmount()
	}

	container := b.runtime.Get(id)
	if container == nil {
		return fmt.Errorf("An error occured while creating the container")
	}

	// Note: Actually copy the struct
	autoConfig := *b.config
	autoConfig.Cmd = autoCmd
	// Commit the container
	image, err := b.runtime.Commit(container, "", "", "", b.maintainer, &autoConfig)
	if err != nil {
		return err
	}
	b.tmpImages[image.ID] = struct{}{}
	b.image = image.ID
	return nil
}
Esempio n. 6
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func TestImagesViz(t *testing.T) {
	stdout, stdoutPipe := io.Pipe()

	cli := docker.NewDockerCli(nil, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr)
	defer cleanup(globalEngine, t)

	image := buildTestImages(t, globalEngine)

	c := make(chan struct{})
	go func() {
		defer close(c)
		if err := cli.CmdImages("-viz"); err != nil {
			t.Fatal(err)
		}
		stdoutPipe.Close()
	}()

	setTimeout(t, "Reading command output time out", 2*time.Second, func() {
		cmdOutputBytes, err := ioutil.ReadAll(bufio.NewReader(stdout))
		if err != nil {
			t.Fatal(err)
		}
		cmdOutput := string(cmdOutputBytes)

		regexpStrings := []string{
			"digraph docker {",
			fmt.Sprintf("base -> \"%s\" \\[style=invis]", unitTestImageIDShort),
			fmt.Sprintf("label=\"%s\\\\n%s:latest\"", unitTestImageIDShort, unitTestImageName),
			fmt.Sprintf("label=\"%s\\\\n%s:%s\"", utils.TruncateID(image.ID), "test", "latest"),
			"base \\[style=invisible]",
		}

		compiledRegexps := []*regexp.Regexp{}
		for _, regexpString := range regexpStrings {
			regexp, err := regexp.Compile(regexpString)
			if err != nil {
				fmt.Println("Error in regex string: ", err)
				return
			}
			compiledRegexps = append(compiledRegexps, regexp)
		}

		for _, regexp := range compiledRegexps {
			if !regexp.MatchString(cmdOutput) {
				t.Fatalf("images -viz content '%s' did not match regexp '%s'", cmdOutput, regexp)
			}
		}
	})
}
Esempio n. 7
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func (b *buildFile) run() (string, error) {
	if b.image == "" {
		return "", fmt.Errorf("Please provide a source image with `from` prior to run")
	}
	b.config.Image = b.image

	// Create the container and start it
	c, _, err := b.runtime.Create(b.config, "")
	if err != nil {
		return "", err
	}
	b.tmpContainers[c.ID] = struct{}{}
	fmt.Fprintf(b.outStream, " ---> Running in %s\n", utils.TruncateID(c.ID))

	// override the entry point that may have been picked up from the base image
	c.Path = b.config.Cmd[0]
	c.Args = b.config.Cmd[1:]

	var errCh chan error

	if b.verbose {
		errCh = utils.Go(func() error {
			return <-c.Attach(nil, nil, b.outStream, b.errStream)
		})
	}

	//start the container
	if err := c.Start(); err != nil {
		return "", err
	}

	if errCh != nil {
		if err := <-errCh; err != nil {
			return "", err
		}
	}

	// Wait for it to finish
	if ret := c.Wait(); ret != 0 {
		err := &utils.JSONError{
			Message: fmt.Sprintf("The command %v returned a non-zero code: %d", b.config.Cmd, ret),
			Code:    ret,
		}
		return "", err
	}

	return c.ID, nil
}
Esempio n. 8
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func TestImagesTree(t *testing.T) {
	stdout, stdoutPipe := io.Pipe()

	cli := docker.NewDockerCli(nil, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr)
	defer cleanup(globalEngine, t)

	image := buildTestImages(t, globalEngine)

	c := make(chan struct{})
	go func() {
		defer close(c)
		if err := cli.CmdImages("-tree"); err != nil {
			t.Fatal(err)
		}
		stdoutPipe.Close()
	}()

	setTimeout(t, "Reading command output time out", 2*time.Second, func() {
		cmdOutputBytes, err := ioutil.ReadAll(bufio.NewReader(stdout))
		if err != nil {
			t.Fatal(err)
		}
		cmdOutput := string(cmdOutputBytes)
		regexpStrings := []string{
			fmt.Sprintf("└─%s Virtual Size: \\d+.\\d+ MB Tags: %s:latest", unitTestImageIDShort, unitTestImageName),
			"(?m)   └─[0-9a-f]+.*",
			"(?m)    └─[0-9a-f]+.*",
			"(?m)      └─[0-9a-f]+.*",
			fmt.Sprintf("(?m)^        └─%s Virtual Size: \\d+.\\d+ MB Tags: test:latest", utils.TruncateID(image.ID)),
		}

		compiledRegexps := []*regexp.Regexp{}
		for _, regexpString := range regexpStrings {
			regexp, err := regexp.Compile(regexpString)
			if err != nil {
				fmt.Println("Error in regex string: ", err)
				return
			}
			compiledRegexps = append(compiledRegexps, regexp)
		}

		for _, regexp := range compiledRegexps {
			if !regexp.MatchString(cmdOutput) {
				t.Fatalf("images -tree content '%s' did not match regexp '%s'", cmdOutput, regexp)
			}
		}
	})
}
Esempio n. 9
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func GenerateID() string {
	for {
		id := make([]byte, 32)
		if _, err := io.ReadFull(rand.Reader, id); err != nil {
			panic(err) // This shouldn't happen
		}
		value := hex.EncodeToString(id)
		// if we try to parse the truncated for as an int and we don't have
		// an error then the value is all numberic and causes issues when
		// used as a hostname. ref #3869
		if _, err := strconv.Atoi(utils.TruncateID(value)); err == nil {
			continue
		}
		return value
	}
}
Esempio n. 10
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func (runtime *Runtime) ensureName(container *Container) error {
	if container.Name == "" {
		name, err := generateRandomName(runtime)
		if err != nil {
			name = utils.TruncateID(container.ID)
		}
		container.Name = name

		if err := container.ToDisk(); err != nil {
			utils.Debugf("Error saving container name %s", err)
		}
		if !runtime.containerGraph.Exists(name) {
			if _, err := runtime.containerGraph.Set(name, container.ID); err != nil {
				utils.Debugf("Setting default id - %s", err)
			}
		}
	}
	return nil
}
Esempio n. 11
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func (container *Container) Kill() error {
	if !container.State.IsRunning() {
		return nil
	}

	// 1. Send SIGKILL
	if err := container.kill(9); err != nil {
		return err
	}

	// 2. Wait for the process to die, in last resort, try to kill the process directly
	if err := container.WaitTimeout(10 * time.Second); err != nil {
		if container.command == nil {
			return fmt.Errorf("lxc-kill failed, impossible to kill the container %s", utils.TruncateID(container.ID))
		}
		log.Printf("Container %s failed to exit within 10 seconds of lxc-kill %s - trying direct SIGKILL", "SIGKILL", utils.TruncateID(container.ID))
		if err := container.runtime.Kill(container, 9); err != nil {
			return err
		}
	}

	container.Wait()
	return nil
}
Esempio n. 12
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func TestRuntimeCreate(t *testing.T) {
	runtime := mkRuntime(t)
	defer nuke(runtime)

	// Make sure we start we 0 containers
	if len(runtime.List()) != 0 {
		t.Errorf("Expected 0 containers, %v found", len(runtime.List()))
	}

	container, _, err := runtime.Create(&docker.Config{
		Image: GetTestImage(runtime).ID,
		Cmd:   []string{"ls", "-al"},
	},
		"",
	)
	if err != nil {
		t.Fatal(err)
	}

	defer func() {
		if err := runtime.Destroy(container); err != nil {
			t.Error(err)
		}
	}()

	// Make sure we can find the newly created container with List()
	if len(runtime.List()) != 1 {
		t.Errorf("Expected 1 container, %v found", len(runtime.List()))
	}

	// Make sure the container List() returns is the right one
	if runtime.List()[0].ID != container.ID {
		t.Errorf("Unexpected container %v returned by List", runtime.List()[0])
	}

	// Make sure we can get the container with Get()
	if runtime.Get(container.ID) == nil {
		t.Errorf("Unable to get newly created container")
	}

	// Make sure it is the right container
	if runtime.Get(container.ID) != container {
		t.Errorf("Get() returned the wrong container")
	}

	// Make sure Exists returns it as existing
	if !runtime.Exists(container.ID) {
		t.Errorf("Exists() returned false for a newly created container")
	}

	// Test that conflict error displays correct details
	testContainer, _, _ := runtime.Create(
		&docker.Config{
			Image: GetTestImage(runtime).ID,
			Cmd:   []string{"ls", "-al"},
		},
		"conflictname",
	)
	if _, _, err := runtime.Create(&docker.Config{Image: GetTestImage(runtime).ID, Cmd: []string{"ls", "-al"}}, testContainer.Name); err == nil || !strings.Contains(err.Error(), utils.TruncateID(testContainer.ID)) {
		t.Fatalf("Name conflict error doesn't include the correct short id. Message was: %s", err.Error())
	}

	// Make sure create with bad parameters returns an error
	if _, _, err = runtime.Create(&docker.Config{Image: GetTestImage(runtime).ID}, ""); err == nil {
		t.Fatal("Builder.Create should throw an error when Cmd is missing")
	}

	if _, _, err := runtime.Create(
		&docker.Config{
			Image: GetTestImage(runtime).ID,
			Cmd:   []string{},
		},
		"",
	); err == nil {
		t.Fatal("Builder.Create should throw an error when Cmd is empty")
	}

	config := &docker.Config{
		Image:     GetTestImage(runtime).ID,
		Cmd:       []string{"/bin/ls"},
		PortSpecs: []string{"80"},
	}
	container, _, err = runtime.Create(config, "")

	_, err = runtime.Commit(container, "testrepo", "testtag", "", "", config)
	if err != nil {
		t.Error(err)
	}

	// test expose 80:8000
	container, warnings, err := runtime.Create(&docker.Config{
		Image:     GetTestImage(runtime).ID,
		Cmd:       []string{"ls", "-al"},
		PortSpecs: []string{"80:8000"},
	},
		"",
	)
	if err != nil {
		t.Fatal(err)
	}
	if warnings == nil || len(warnings) != 1 {
		t.Error("Expected a warning, got none")
	}
}
Esempio n. 13
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// TempLayerArchive creates a temporary archive of the given image's filesystem layer.
//   The archive is stored on disk and will be automatically deleted as soon as has been read.
//   If output is not nil, a human-readable progress bar will be written to it.
//   FIXME: does this belong in Graph? How about MktempFile, let the caller use it for archives?
func (graph *Graph) TempLayerArchive(id string, compression archive.Compression, sf *utils.StreamFormatter, output io.Writer) (*archive.TempArchive, error) {
	image, err := graph.Get(id)
	if err != nil {
		return nil, err
	}
	tmp, err := graph.Mktemp("")
	if err != nil {
		return nil, err
	}
	a, err := image.TarLayer()
	if err != nil {
		return nil, err
	}
	return archive.NewTempArchive(utils.ProgressReader(ioutil.NopCloser(a), 0, output, sf, false, utils.TruncateID(id), "Buffering to disk"), tmp)
}
Esempio n. 14
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// TestAttachDetachTruncatedID checks that attach in tty mode can be detached
func TestAttachDetachTruncatedID(t *testing.T) {
	stdin, stdinPipe := io.Pipe()
	stdout, stdoutPipe := io.Pipe()

	cli := docker.NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr)
	defer cleanup(globalEngine, t)

	// Discard the CmdRun output
	go stdout.Read(make([]byte, 1024))
	setTimeout(t, "Starting container timed out", 2*time.Second, func() {
		if err := cli.CmdRun("-i", "-t", "-d", unitTestImageID, "cat"); err != nil {
			t.Fatal(err)
		}
	})

	container := waitContainerStart(t, 10*time.Second)

	state := setRaw(t, container)
	defer unsetRaw(t, container, state)

	stdin, stdinPipe = io.Pipe()
	stdout, stdoutPipe = io.Pipe()
	cli = docker.NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr)

	ch := make(chan struct{})
	go func() {
		defer close(ch)
		if err := cli.CmdAttach(utils.TruncateID(container.ID)); err != nil {
			if err != io.ErrClosedPipe {
				t.Fatal(err)
			}
		}
	}()

	setTimeout(t, "First read/write assertion timed out", 2*time.Second, func() {
		if err := assertPipe("hello\n", "hello", stdout, stdinPipe, 150); err != nil {
			if err != io.ErrClosedPipe {
				t.Fatal(err)
			}
		}
	})

	setTimeout(t, "Escape sequence timeout", 5*time.Second, func() {
		stdinPipe.Write([]byte{16})
		time.Sleep(100 * time.Millisecond)
		stdinPipe.Write([]byte{17})
	})

	// wait for CmdRun to return
	setTimeout(t, "Waiting for CmdAttach timed out", 15*time.Second, func() {
		<-ch
	})
	closeWrap(stdin, stdinPipe, stdout, stdoutPipe)

	time.Sleep(500 * time.Millisecond)
	if !container.State.IsRunning() {
		t.Fatal("The detached container should be still running")
	}

	setTimeout(t, "Waiting for container to die timedout", 5*time.Second, func() {
		container.Kill()
	})
}
Esempio n. 15
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func (b *buildFile) Build(context io.Reader) (string, error) {
	tmpdirPath, err := ioutil.TempDir("", "docker-build")
	if err != nil {
		return "", err
	}

	decompressedStream, err := archive.DecompressStream(context)
	if err != nil {
		return "", err
	}

	b.context = &utils.TarSum{Reader: decompressedStream, DisableCompression: true}
	if err := archive.Untar(b.context, tmpdirPath, nil); err != nil {
		return "", err
	}
	defer os.RemoveAll(tmpdirPath)

	b.contextPath = tmpdirPath
	filename := path.Join(tmpdirPath, "Dockerfile")
	if _, err := os.Stat(filename); os.IsNotExist(err) {
		return "", fmt.Errorf("Can't build a directory with no Dockerfile")
	}
	fileBytes, err := ioutil.ReadFile(filename)
	if err != nil {
		return "", err
	}
	if len(fileBytes) == 0 {
		return "", ErrDockerfileEmpty
	}
	dockerfile := string(fileBytes)
	dockerfile = lineContinuation.ReplaceAllString(dockerfile, "")
	stepN := 0
	for _, line := range strings.Split(dockerfile, "\n") {
		line = strings.Trim(strings.Replace(line, "\t", " ", -1), " \t\r\n")
		// Skip comments and empty line
		if len(line) == 0 || line[0] == '#' {
			continue
		}
		tmp := strings.SplitN(line, " ", 2)
		if len(tmp) != 2 {
			return "", fmt.Errorf("Invalid Dockerfile format")
		}
		instruction := strings.ToLower(strings.Trim(tmp[0], " "))
		arguments := strings.Trim(tmp[1], " ")

		method, exists := reflect.TypeOf(b).MethodByName("Cmd" + strings.ToUpper(instruction[:1]) + strings.ToLower(instruction[1:]))
		if !exists {
			fmt.Fprintf(b.errStream, "# Skipping unknown instruction %s\n", strings.ToUpper(instruction))
			continue
		}

		stepN += 1
		fmt.Fprintf(b.outStream, "Step %d : %s %s\n", stepN, strings.ToUpper(instruction), arguments)

		ret := method.Func.Call([]reflect.Value{reflect.ValueOf(b), reflect.ValueOf(arguments)})[0].Interface()
		if ret != nil {
			return "", ret.(error)
		}

		fmt.Fprintf(b.outStream, " ---> %s\n", utils.TruncateID(b.image))
	}
	if b.image != "" {
		fmt.Fprintf(b.outStream, "Successfully built %s\n", utils.TruncateID(b.image))
		if b.rm {
			b.clearTmp(b.tmpContainers)
		}
		return b.image, nil
	}
	return "", fmt.Errorf("No image was generated. This may be because the Dockerfile does not, like, do anything.\n")
}
Esempio n. 16
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func (runtime *Runtime) restore() error {
	if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
		fmt.Printf("Loading containers: ")
	}
	dir, err := ioutil.ReadDir(runtime.repository)
	if err != nil {
		return err
	}
	containers := make(map[string]*Container)
	currentDriver := runtime.driver.String()

	for _, v := range dir {
		id := v.Name()
		container, err := runtime.load(id)
		if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
			fmt.Print(".")
		}
		if err != nil {
			utils.Errorf("Failed to load container %v: %v", id, err)
			continue
		}

		// Ignore the container if it does not support the current driver being used by the graph
		if container.Driver == "" && currentDriver == "aufs" || container.Driver == currentDriver {
			utils.Debugf("Loaded container %v", container.ID)
			containers[container.ID] = container
		} else {
			utils.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
		}
	}

	register := func(container *Container) {
		if err := runtime.Register(container); err != nil {
			utils.Debugf("Failed to register container %s: %s", container.ID, err)
		}
	}

	if entities := runtime.containerGraph.List("/", -1); entities != nil {
		for _, p := range entities.Paths() {
			if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
				fmt.Print(".")
			}
			e := entities[p]
			if container, ok := containers[e.ID()]; ok {
				register(container)
				delete(containers, e.ID())
			}
		}
	}

	// Any containers that are left over do not exist in the graph
	for _, container := range containers {
		// Try to set the default name for a container if it exists prior to links
		container.Name, err = generateRandomName(runtime)
		if err != nil {
			container.Name = utils.TruncateID(container.ID)
		}

		if _, err := runtime.containerGraph.Set(container.Name, container.ID); err != nil {
			utils.Debugf("Setting default id - %s", err)
		}
		register(container)
	}

	if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
		fmt.Printf(": done.\n")
	}

	return nil
}
Esempio n. 17
0
// Create creates a new container from the given configuration with a given name.
func (runtime *Runtime) Create(config *Config, name string) (*Container, []string, error) {
	// Lookup image
	img, err := runtime.repositories.LookupImage(config.Image)
	if err != nil {
		return nil, nil, err
	}

	// We add 2 layers to the depth because the container's rw and
	// init layer add to the restriction
	depth, err := img.Depth()
	if err != nil {
		return nil, nil, err
	}

	if depth+2 >= MaxImageDepth {
		return nil, nil, fmt.Errorf("Cannot create container with more than %d parents", MaxImageDepth)
	}

	checkDeprecatedExpose := func(config *Config) bool {
		if config != nil {
			if config.PortSpecs != nil {
				for _, p := range config.PortSpecs {
					if strings.Contains(p, ":") {
						return true
					}
				}
			}
		}
		return false
	}

	warnings := []string{}
	if checkDeprecatedExpose(img.Config) || checkDeprecatedExpose(config) {
		warnings = append(warnings, "The mapping to public ports on your host has been deprecated. Use -p to publish the ports.")
	}

	if img.Config != nil {
		if err := MergeConfig(config, img.Config); err != nil {
			return nil, nil, err
		}
	}

	if len(config.Entrypoint) != 0 && config.Cmd == nil {
		config.Cmd = []string{}
	} else if config.Cmd == nil || len(config.Cmd) == 0 {
		return nil, nil, fmt.Errorf("No command specified")
	}

	// Generate id
	id := GenerateID()

	if name == "" {
		name, err = generateRandomName(runtime)
		if err != nil {
			name = utils.TruncateID(id)
		}
	} else {
		if !validContainerNamePattern.MatchString(name) {
			return nil, nil, fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
		}
	}

	if name[0] != '/' {
		name = "/" + name
	}

	// Set the enitity in the graph using the default name specified
	if _, err := runtime.containerGraph.Set(name, id); err != nil {
		if !strings.HasSuffix(err.Error(), "name are not unique") {
			return nil, nil, err
		}

		conflictingContainer, err := runtime.GetByName(name)
		if err != nil {
			if strings.Contains(err.Error(), "Could not find entity") {
				return nil, nil, err
			}

			// Remove name and continue starting the container
			if err := runtime.containerGraph.Delete(name); err != nil {
				return nil, nil, err
			}
		} else {
			nameAsKnownByUser := strings.TrimPrefix(name, "/")
			return nil, nil, fmt.Errorf(
				"Conflict, The name %s is already assigned to %s. You have to delete (or rename) that container to be able to assign %s to a container again.", nameAsKnownByUser,
				utils.TruncateID(conflictingContainer.ID), nameAsKnownByUser)
		}
	}

	// Generate default hostname
	// FIXME: the lxc template no longer needs to set a default hostname
	if config.Hostname == "" {
		config.Hostname = id[:12]
	}

	var args []string
	var entrypoint string

	if len(config.Entrypoint) != 0 {
		entrypoint = config.Entrypoint[0]
		args = append(config.Entrypoint[1:], config.Cmd...)
	} else {
		entrypoint = config.Cmd[0]
		args = config.Cmd[1:]
	}

	container := &Container{
		// FIXME: we should generate the ID here instead of receiving it as an argument
		ID:              id,
		Created:         time.Now().UTC(),
		Path:            entrypoint,
		Args:            args, //FIXME: de-duplicate from config
		Config:          config,
		hostConfig:      &HostConfig{},
		Image:           img.ID, // Always use the resolved image id
		NetworkSettings: &NetworkSettings{},
		Name:            name,
		Driver:          runtime.driver.String(),
	}
	container.root = runtime.containerRoot(container.ID)
	// Step 1: create the container directory.
	// This doubles as a barrier to avoid race conditions.
	if err := os.Mkdir(container.root, 0700); err != nil {
		return nil, nil, err
	}

	initID := fmt.Sprintf("%s-init", container.ID)
	if err := runtime.driver.Create(initID, img.ID); err != nil {
		return nil, nil, err
	}
	initPath, err := runtime.driver.Get(initID)
	if err != nil {
		return nil, nil, err
	}
	defer runtime.driver.Put(initID)

	if err := setupInitLayer(initPath); err != nil {
		return nil, nil, err
	}

	if err := runtime.driver.Create(container.ID, initID); err != nil {
		return nil, nil, err
	}
	resolvConf, err := utils.GetResolvConf()
	if err != nil {
		return nil, nil, err
	}

	if len(config.Dns) == 0 && len(runtime.config.Dns) == 0 && utils.CheckLocalDns(resolvConf) {
		//"WARNING: Docker detected local DNS server on resolv.conf. Using default external servers: %v", defaultDns
		runtime.config.Dns = defaultDns
	}

	// If custom dns exists, then create a resolv.conf for the container
	if len(config.Dns) > 0 || len(runtime.config.Dns) > 0 {
		var dns []string
		if len(config.Dns) > 0 {
			dns = config.Dns
		} else {
			dns = runtime.config.Dns
		}
		container.ResolvConfPath = path.Join(container.root, "resolv.conf")
		f, err := os.Create(container.ResolvConfPath)
		if err != nil {
			return nil, nil, err
		}
		defer f.Close()
		for _, dns := range dns {
			if _, err := f.Write([]byte("nameserver " + dns + "\n")); err != nil {
				return nil, nil, err
			}
		}
	} else {
		container.ResolvConfPath = "/etc/resolv.conf"
	}

	// Step 2: save the container json
	if err := container.ToDisk(); err != nil {
		return nil, nil, err
	}

	// Step 3: register the container
	if err := runtime.Register(container); err != nil {
		return nil, nil, err
	}
	return container, warnings, nil
}
Esempio n. 18
0
func (store *TagStore) ImageName(id string) string {
	if names, exists := store.ByID()[id]; exists && len(names) > 0 {
		return names[0]
	}
	return utils.TruncateID(id)
}