Golang engine.Env類代碼示例

func postContainersCreate(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := parseForm(r); err != nil {
		return nil
	}
	var (
		out         engine.Env
		job         = eng.Job("create", r.Form.Get("name"))
		outWarnings []string
		outId       string
		warnings    = bytes.NewBuffer(nil)
	)
	if err := job.DecodeEnv(r.Body); err != nil {
		return err
	}
	// Read container ID from the first line of stdout
	job.Stdout.AddString(&outId)
	// Read warnings from stderr
	job.Stderr.Add(warnings)
	if err := job.Run(); err != nil {
		return err
	}
	// Parse warnings from stderr
	scanner := bufio.NewScanner(warnings)
	for scanner.Scan() {
		outWarnings = append(outWarnings, scanner.Text())
	}
	out.Set("Id", outId)
	out.SetList("Warnings", outWarnings)
	return writeJSON(w, http.StatusCreated, out)
}

func (container *Container) allocateNetwork() error {
	mode := container.hostConfig.NetworkMode
	if container.Config.NetworkDisabled || mode.IsContainer() || mode.IsHost() {
		return nil
	}

	var (
		env *engine.Env
		err error
		eng = container.daemon.eng
	)

	job := eng.Job("allocate_interface", container.ID)
	if env, err = job.Stdout.AddEnv(); err != nil {
		return err
	}
	if err := job.Run(); err != nil {
		return err
	}

	if container.Config.PortSpecs != nil {
		if err := migratePortMappings(container.Config, container.hostConfig); err != nil {
			return err
		}
		container.Config.PortSpecs = nil
		if err := container.WriteHostConfig(); err != nil {
			return err
		}
	}

	var (
		portSpecs = make(nat.PortSet)
		bindings  = make(nat.PortMap)
	)

	if container.Config.ExposedPorts != nil {
		portSpecs = container.Config.ExposedPorts
	}
	if container.hostConfig.PortBindings != nil {
		bindings = container.hostConfig.PortBindings
	}

	container.NetworkSettings.PortMapping = nil

	for port := range portSpecs {
		if err := container.allocatePort(eng, port, bindings); err != nil {
			return err
		}
	}
	container.WriteHostConfig()

	container.NetworkSettings.Ports = bindings
	container.NetworkSettings.Bridge = env.Get("Bridge")
	container.NetworkSettings.IPAddress = env.Get("IP")
	container.NetworkSettings.IPPrefixLen = env.GetInt("IPPrefixLen")
	container.NetworkSettings.Gateway = env.Get("Gateway")

	return nil
}

func waitForExit(cli *DockerCli, containerId string) (int, error) {
	stream, _, err := cli.call("POST", "/containers/"+containerId+"/wait", nil, false)
	if err != nil {
		return -1, err
	}

	var out engine.Env
	if err := out.Decode(stream); err != nil {
		return -1, err
	}
	return out.GetInt("StatusCode"), nil
}

func postContainersWait(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}
	var (
		env          engine.Env
		stdoutBuffer = bytes.NewBuffer(nil)
		job          = eng.Job("wait", vars["name"])
	)
	job.Stdout.Add(stdoutBuffer)
	if err := job.Run(); err != nil {
		return err
	}

	env.Set("StatusCode", engine.Tail(stdoutBuffer, 1))
	return writeJSON(w, http.StatusOK, env)
}

func TestPostContainersCopyWhenContainerNotFound(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()

	r := httptest.NewRecorder()

	var copyData engine.Env
	copyData.Set("Resource", "/test.txt")
	copyData.Set("HostPath", ".")

	jsonData := bytes.NewBuffer(nil)
	if err := copyData.Encode(jsonData); err != nil {
		t.Fatal(err)
	}

	req, err := http.NewRequest("POST", "/containers/id_not_found/copy", jsonData)
	if err != nil {
		t.Fatal(err)
	}
	req.Header.Add("Content-Type", "application/json")
	if err := api.ServeRequest(eng, api.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	if r.Code != http.StatusNotFound {
		t.Fatalf("404 expected for id_not_found Container, received %v", r.Code)
	}
}

// getExitCode perform an inspect on the container. It returns
// the running state and the exit code.
func getExitCode(cli *DockerCli, containerId string) (bool, int, error) {
	steam, _, err := cli.call("GET", "/containers/"+containerId+"/json", nil, false)
	if err != nil {
		// If we can't connect, then the daemon probably died.
		if err != ErrConnectionRefused {
			return false, -1, err
		}
		return false, -1, nil
	}

	var result engine.Env
	if err := result.Decode(steam); err != nil {
		return false, -1, err
	}

	state := result.GetSubEnv("State")
	return state.GetBool("Running"), state.GetInt("ExitCode"), nil
}

func TestPostContainersCopy(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	// Create a container and remove a file
	containerID := createTestContainer(eng,
		&docker.Config{
			Image: unitTestImageID,
			Cmd:   []string{"touch", "/test.txt"},
		},
		t,
	)
	containerRun(eng, containerID, t)

	r := httptest.NewRecorder()

	var copyData engine.Env
	copyData.Set("Resource", "/test.txt")
	copyData.Set("HostPath", ".")

	jsonData := bytes.NewBuffer(nil)
	if err := copyData.Encode(jsonData); err != nil {
		t.Fatal(err)
	}

	req, err := http.NewRequest("POST", "/containers/"+containerID+"/copy", jsonData)
	if err != nil {
		t.Fatal(err)
	}
	req.Header.Add("Content-Type", "application/json")
	if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	assertHttpNotError(r, t)

	if r.Code != http.StatusOK {
		t.Fatalf("%d OK expected, received %d\n", http.StatusOK, r.Code)
	}

	found := false
	for tarReader := tar.NewReader(r.Body); ; {
		h, err := tarReader.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			t.Fatal(err)
		}
		if h.Name == "test.txt" {
			found = true
			break
		}
	}
	if !found {
		t.Fatalf("The created test file has not been found in the copied output")
	}
}

func TestPostContainersCreate(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	configJSON, err := json.Marshal(&docker.Config{
		Image:  unitTestImageID,
		Memory: 33554432,
		Cmd:    []string{"touch", "/test"},
	})
	if err != nil {
		t.Fatal(err)
	}

	req, err := http.NewRequest("POST", "/containers/create", bytes.NewReader(configJSON))
	if err != nil {
		t.Fatal(err)
	}

	r := httptest.NewRecorder()
	if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	assertHttpNotError(r, t)
	if r.Code != http.StatusCreated {
		t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
	}

	var apiRun engine.Env
	if err := apiRun.Decode(r.Body); err != nil {
		t.Fatal(err)
	}
	containerID := apiRun.Get("Id")

	containerAssertExists(eng, containerID, t)
	containerRun(eng, containerID, t)

	if !containerFileExists(eng, containerID, "test", t) {
		t.Fatal("Test file was not created")
	}
}

func postContainersWait(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}
	var (
		env    engine.Env
		status string
		job    = eng.Job("wait", vars["name"])
	)
	job.Stdout.AddString(&status)
	if err := job.Run(); err != nil {
		return err
	}
	// Parse a 16-bit encoded integer to map typical unix exit status.
	_, err := strconv.ParseInt(status, 10, 16)
	if err != nil {
		return err
	}
	env.Set("StatusCode", status)
	return writeJSON(w, http.StatusOK, env)
}

// Allocate an external port and map it to the interface
func AllocatePort(job *engine.Job) engine.Status {
	var (
		err error

		ip            = defaultBindingIP
		id            = job.Args[0]
		hostIP        = job.Getenv("HostIP")
		hostPort      = job.GetenvInt("HostPort")
		containerPort = job.GetenvInt("ContainerPort")
		proto         = job.Getenv("Proto")
		network       = currentInterfaces[id]
	)

	if hostIP != "" {
		ip = net.ParseIP(hostIP)
	}

	// host ip, proto, and host port
	hostPort, err = portallocator.RequestPort(ip, proto, hostPort)
	if err != nil {
		job.Error(err)
		return engine.StatusErr
	}

	var (
		container net.Addr
		host      net.Addr
	)

	if proto == "tcp" {
		host = &net.TCPAddr{IP: ip, Port: hostPort}
		container = &net.TCPAddr{IP: network.IP, Port: containerPort}
	} else {
		host = &net.UDPAddr{IP: ip, Port: hostPort}
		container = &net.UDPAddr{IP: network.IP, Port: containerPort}
	}

	if err := portmapper.Map(container, ip, hostPort); err != nil {
		portallocator.ReleasePort(ip, proto, hostPort)

		job.Error(err)
		return engine.StatusErr
	}
	network.PortMappings = append(network.PortMappings, host)

	out := engine.Env{}
	out.Set("HostIP", ip.String())
	out.SetInt("HostPort", hostPort)

	if _, err := out.WriteTo(job.Stdout); err != nil {
		job.Error(err)
		return engine.StatusErr
	}
	return engine.StatusOK
}

func postCommit(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := parseForm(r); err != nil {
		return err
	}
	var (
		config engine.Env
		env    engine.Env
		job    = eng.Job("commit", r.Form.Get("container"))
	)
	if err := config.Import(r.Body); err != nil {
		utils.Errorf("%s", err)
	}

	job.Setenv("repo", r.Form.Get("repo"))
	job.Setenv("tag", r.Form.Get("tag"))
	job.Setenv("author", r.Form.Get("author"))
	job.Setenv("comment", r.Form.Get("comment"))
	job.SetenvSubEnv("config", &config)

	var id string
	job.Stdout.AddString(&id)
	if err := job.Run(); err != nil {
		return err
	}
	env.Set("Id", id)
	return writeJSON(w, http.StatusCreated, env)
}

func postCommit(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := parseForm(r); err != nil {
		return err
	}
	var (
		config       engine.Env
		env          engine.Env
		job          = eng.Job("commit", r.Form.Get("container"))
		stdoutBuffer = bytes.NewBuffer(nil)
	)
	if err := config.Decode(r.Body); err != nil {
		utils.Errorf("%s", err)
	}

	job.Setenv("repo", r.Form.Get("repo"))
	job.Setenv("tag", r.Form.Get("tag"))
	job.Setenv("author", r.Form.Get("author"))
	job.Setenv("comment", r.Form.Get("comment"))
	job.SetenvSubEnv("config", &config)

	job.Stdout.Add(stdoutBuffer)
	if err := job.Run(); err != nil {
		return err
	}
	env.Set("Id", engine.Tail(stdoutBuffer, 1))
	return writeJSON(w, http.StatusCreated, env)
}

func postAuth(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	var (
		authConfig, err = ioutil.ReadAll(r.Body)
		job             = eng.Job("auth")
		status          string
	)
	if err != nil {
		return err
	}
	job.Setenv("authConfig", string(authConfig))
	job.Stdout.AddString(&status)
	if err = job.Run(); err != nil {
		return err
	}
	if status != "" {
		var env engine.Env
		env.Set("Status", status)
		return writeJSON(w, http.StatusOK, env)
	}
	w.WriteHeader(http.StatusNoContent)
	return nil
}

func TestPostCommit(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	// Create a container and remove a file
	containerID := createTestContainer(eng,
		&docker.Config{
			Image: unitTestImageID,
			Cmd:   []string{"touch", "/test"},
		},
		t,
	)

	containerRun(eng, containerID, t)

	req, err := http.NewRequest("POST", "/commit?repo=testrepo&testtag=tag&container="+containerID, bytes.NewReader([]byte{}))
	if err != nil {
		t.Fatal(err)
	}

	r := httptest.NewRecorder()
	if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	assertHttpNotError(r, t)
	if r.Code != http.StatusCreated {
		t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
	}

	var env engine.Env
	if err := env.Decode(r.Body); err != nil {
		t.Fatal(err)
	}
	if _, err := srv.ImageInspect(env.Get("Id")); err != nil {
		t.Fatalf("The image has not been committed")
	}
}

func TestPostContainersWait(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	containerID := createTestContainer(eng,
		&docker.Config{
			Image:     unitTestImageID,
			Cmd:       []string{"/bin/sleep", "1"},
			OpenStdin: true,
		},
		t,
	)
	startContainer(eng, containerID, t)

	setTimeout(t, "Wait timed out", 3*time.Second, func() {
		r := httptest.NewRecorder()
		req, err := http.NewRequest("POST", "/containers/"+containerID+"/wait", bytes.NewReader([]byte{}))
		if err != nil {
			t.Fatal(err)
		}
		if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
			t.Fatal(err)
		}
		assertHttpNotError(r, t)
		var apiWait engine.Env
		if err := apiWait.Decode(r.Body); err != nil {
			t.Fatal(err)
		}
		if apiWait.GetInt("StatusCode") != 0 {
			t.Fatalf("Non zero exit code for sleep: %d\n", apiWait.GetInt("StatusCode"))
		}
	})

	if containerRunning(eng, containerID, t) {
		t.Fatalf("The container should be stopped after wait")
	}
}