Golang store.CreateCluster函數代碼示例

func createCluster(t *testing.T, ts *testServer, id, name string, policy api.AcceptancePolicy, rootCA *ca.RootCA) *api.Cluster {
	cluster := createClusterObj(id, name, policy, rootCA)
	assert.NoError(t, ts.Store.Update(func(tx store.Tx) error {
		return store.CreateCluster(tx, cluster)
	}))
	return cluster
}

func createCluster(t *testing.T, s *store.MemoryStore, id, name string) *api.Cluster {
	spec := createClusterSpec(name)

	cluster := &api.Cluster{
		ID:   id,
		Spec: *spec,
	}
	assert.NoError(t, s.Update(func(tx store.Tx) error {
		return store.CreateCluster(tx, cluster)
	}))
	return cluster
}

func createClusterObject(t *testing.T, s *store.MemoryStore, acceptancePolicy api.AcceptancePolicy) {
	assert.NoError(t, s.Update(func(tx store.Tx) error {
		store.CreateCluster(tx, &api.Cluster{
			ID: identity.NewID(),
			Spec: api.ClusterSpec{
				Annotations: api.Annotations{
					Name: store.DefaultClusterName,
				},
				AcceptancePolicy: acceptancePolicy,
			},
		})
		return nil
	}))
}

func createClusterObject(t *testing.T, s *store.MemoryStore, clusterID string, acceptancePolicy api.AcceptancePolicy, externalCAs ...*api.ExternalCA) {
	assert.NoError(t, s.Update(func(tx store.Tx) error {
		store.CreateCluster(tx, &api.Cluster{
			ID: clusterID,
			Spec: api.ClusterSpec{
				Annotations: api.Annotations{
					Name: store.DefaultClusterName,
				},
				AcceptancePolicy: acceptancePolicy,
				CAConfig: api.CAConfig{
					ExternalCAs: externalCAs,
				},
			},
		})
		return nil
	}))
}

func createCluster(t *testing.T, ts *testServer, id, name string, policy api.AcceptancePolicy) *api.Cluster {
	spec := createClusterSpec(name)
	spec.AcceptancePolicy = policy

	cluster := &api.Cluster{
		ID:   id,
		Spec: *spec,
		RootCA: api.RootCA{
			CACert:     []byte("-----BEGIN CERTIFICATE-----AwEHoUQDQgAEZ4vGYkSt/kjoHbUjDx9eyO1xBVJEH2F+AwM9lACIZ414cD1qYy8u-----BEGIN CERTIFICATE-----"),
			CAKey:      []byte("-----BEGIN EC PRIVATE KEY-----AwEHoUQDQgAEZ4vGYkSt/kjoHbUjDx9eyO1xBVJEH2F+AwM9lACIZ414cD1qYy8u-----END EC PRIVATE KEY-----"),
			CACertHash: "hash",
		},
	}
	assert.NoError(t, ts.Store.Update(func(tx store.Tx) error {
		return store.CreateCluster(tx, cluster)
	}))
	return cluster
}

// Run starts all manager sub-systems and the gRPC server at the configured
// address.
// The call never returns unless an error occurs or `Stop()` is called.
//
// TODO(aluzzardi): /!\ This function is *way* too complex. /!\
// It needs to be split into smaller manageable functions.
func (m *Manager) Run(parent context.Context) error {
	ctx, ctxCancel := context.WithCancel(parent)
	defer ctxCancel()

	// Harakiri.
	go func() {
		select {
		case <-ctx.Done():
		case <-m.stopped:
			ctxCancel()
		}
	}()

	leadershipCh, cancel := m.RaftNode.SubscribeLeadership()
	defer cancel()

	go func() {
		for leadershipEvent := range leadershipCh {
			// read out and discard all of the messages when we've stopped
			// don't acquire the mutex yet. if stopped is closed, we don't need
			// this stops this loop from starving Run()'s attempt to Lock
			select {
			case <-m.stopped:
				continue
			default:
				// do nothing, we're not stopped
			}
			// we're not stopping so NOW acquire the mutex
			m.mu.Lock()
			newState := leadershipEvent.(raft.LeadershipState)

			if newState == raft.IsLeader {
				s := m.RaftNode.MemoryStore()

				rootCA := m.config.SecurityConfig.RootCA()
				nodeID := m.config.SecurityConfig.ClientTLSCreds.NodeID()

				raftCfg := raft.DefaultRaftConfig()
				raftCfg.ElectionTick = uint32(m.RaftNode.Config.ElectionTick)
				raftCfg.HeartbeatTick = uint32(m.RaftNode.Config.HeartbeatTick)

				clusterID := m.config.SecurityConfig.ClientTLSCreds.Organization()

				initialCAConfig := ca.DefaultCAConfig()
				initialCAConfig.ExternalCAs = m.config.ExternalCAs

				s.Update(func(tx store.Tx) error {
					// Add a default cluster object to the
					// store. Don't check the error because
					// we expect this to fail unless this
					// is a brand new cluster.
					store.CreateCluster(tx, &api.Cluster{
						ID: clusterID,
						Spec: api.ClusterSpec{
							Annotations: api.Annotations{
								Name: store.DefaultClusterName,
							},
							Orchestration: api.OrchestrationConfig{
								TaskHistoryRetentionLimit: defaultTaskHistoryRetentionLimit,
							},
							Dispatcher: api.DispatcherConfig{
								HeartbeatPeriod: ptypes.DurationProto(dispatcher.DefaultHeartBeatPeriod),
							},
							Raft:     raftCfg,
							CAConfig: initialCAConfig,
						},
						RootCA: api.RootCA{
							CAKey:      rootCA.Key,
							CACert:     rootCA.Cert,
							CACertHash: rootCA.Digest.String(),
							JoinTokens: api.JoinTokens{
								Worker:  ca.GenerateJoinToken(rootCA),
								Manager: ca.GenerateJoinToken(rootCA),
							},
						},
					})
					// Add Node entry for ourself, if one
					// doesn't exist already.
					store.CreateNode(tx, &api.Node{
						ID: nodeID,
						Certificate: api.Certificate{
							CN:   nodeID,
							Role: api.NodeRoleManager,
							Status: api.IssuanceStatus{
								State: api.IssuanceStateIssued,
							},
						},
						Spec: api.NodeSpec{
							Role:       api.NodeRoleManager,
							Membership: api.NodeMembershipAccepted,
						},
					})
					return nil
				})
//.........這裏部分代碼省略.........

// becomeLeader starts the subsystems that are run on the leader.
func (m *Manager) becomeLeader(ctx context.Context) {
	s := m.RaftNode.MemoryStore()

	rootCA := m.config.SecurityConfig.RootCA()
	nodeID := m.config.SecurityConfig.ClientTLSCreds.NodeID()

	raftCfg := raft.DefaultRaftConfig()
	raftCfg.ElectionTick = uint32(m.RaftNode.Config.ElectionTick)
	raftCfg.HeartbeatTick = uint32(m.RaftNode.Config.HeartbeatTick)

	clusterID := m.config.SecurityConfig.ClientTLSCreds.Organization()

	initialCAConfig := ca.DefaultCAConfig()
	initialCAConfig.ExternalCAs = m.config.ExternalCAs

	s.Update(func(tx store.Tx) error {
		// Add a default cluster object to the
		// store. Don't check the error because
		// we expect this to fail unless this
		// is a brand new cluster.
		store.CreateCluster(tx, defaultClusterObject(clusterID, initialCAConfig, raftCfg, rootCA))
		// Add Node entry for ourself, if one
		// doesn't exist already.
		store.CreateNode(tx, managerNode(nodeID))
		return nil
	})

	// Attempt to rotate the key-encrypting-key of the root CA key-material
	err := m.rotateRootCAKEK(ctx, clusterID)
	if err != nil {
		log.G(ctx).WithError(err).Error("root key-encrypting-key rotation failed")
	}

	m.replicatedOrchestrator = orchestrator.NewReplicatedOrchestrator(s)
	m.globalOrchestrator = orchestrator.NewGlobalOrchestrator(s)
	m.taskReaper = orchestrator.NewTaskReaper(s)
	m.scheduler = scheduler.New(s)
	m.keyManager = keymanager.New(s, keymanager.DefaultConfig())

	// TODO(stevvooe): Allocate a context that can be used to
	// shutdown underlying manager processes when leadership is
	// lost.

	m.allocator, err = allocator.New(s)
	if err != nil {
		log.G(ctx).WithError(err).Error("failed to create allocator")
		// TODO(stevvooe): It doesn't seem correct here to fail
		// creating the allocator but then use it anyway.
	}

	if m.keyManager != nil {
		go func(keyManager *keymanager.KeyManager) {
			if err := keyManager.Run(ctx); err != nil {
				log.G(ctx).WithError(err).Error("keymanager failed with an error")
			}
		}(m.keyManager)
	}

	go func(d *dispatcher.Dispatcher) {
		if err := d.Run(ctx); err != nil {
			log.G(ctx).WithError(err).Error("Dispatcher exited with an error")
		}
	}(m.Dispatcher)

	go func(server *ca.Server) {
		if err := server.Run(ctx); err != nil {
			log.G(ctx).WithError(err).Error("CA signer exited with an error")
		}
	}(m.caserver)

	// Start all sub-components in separate goroutines.
	// TODO(aluzzardi): This should have some kind of error handling so that
	// any component that goes down would bring the entire manager down.
	if m.allocator != nil {
		go func(allocator *allocator.Allocator) {
			if err := allocator.Run(ctx); err != nil {
				log.G(ctx).WithError(err).Error("allocator exited with an error")
			}
		}(m.allocator)
	}

	go func(scheduler *scheduler.Scheduler) {
		if err := scheduler.Run(ctx); err != nil {
			log.G(ctx).WithError(err).Error("scheduler exited with an error")
		}
	}(m.scheduler)

	go func(taskReaper *orchestrator.TaskReaper) {
		taskReaper.Run()
	}(m.taskReaper)

	go func(orchestrator *orchestrator.ReplicatedOrchestrator) {
		if err := orchestrator.Run(ctx); err != nil {
			log.G(ctx).WithError(err).Error("replicated orchestrator exited with an error")
		}
	}(m.replicatedOrchestrator)

	go func(globalOrchestrator *orchestrator.GlobalOrchestrator) {
		if err := globalOrchestrator.Run(ctx); err != nil {
//.........這裏部分代碼省略.........

func TestUpdater(t *testing.T) {
	ctx := context.Background()
	s := store.NewMemoryStore(nil)
	assert.NotNil(t, s)

	// Move tasks to their desired state.
	watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
	defer cancel()
	go func() {
		for {
			select {
			case e := <-watch:
				task := e.(state.EventUpdateTask).Task
				if task.Status.State == task.DesiredState {
					continue
				}
				err := s.Update(func(tx store.Tx) error {
					task = store.GetTask(tx, task.ID)
					task.Status.State = task.DesiredState
					return store.UpdateTask(tx, task)
				})
				assert.NoError(t, err)
			}
		}
	}()

	instances := 3
	cluster := &api.Cluster{
		// test cluster configuration propagation to task creation.
		Spec: api.ClusterSpec{
			Annotations: api.Annotations{
				Name: "default",
			},
		},
	}

	service := &api.Service{
		ID: "id1",
		Spec: api.ServiceSpec{
			Annotations: api.Annotations{
				Name: "name1",
			},
			Mode: &api.ServiceSpec_Replicated{
				Replicated: &api.ReplicatedService{
					Replicas: uint64(instances),
				},
			},
			Task: api.TaskSpec{
				Runtime: &api.TaskSpec_Container{
					Container: &api.ContainerSpec{
						Image: "v:1",
						// This won't apply in this test because we set the old tasks to DEAD.
						StopGracePeriod: ptypes.DurationProto(time.Hour),
					},
				},
			},
		},
	}

	err := s.Update(func(tx store.Tx) error {
		assert.NoError(t, store.CreateCluster(tx, cluster))
		assert.NoError(t, store.CreateService(tx, service))
		for i := 0; i < instances; i++ {
			assert.NoError(t, store.CreateTask(tx, newTask(cluster, service, uint64(i))))
		}
		return nil
	})
	assert.NoError(t, err)

	originalTasks := getRunnableServiceTasks(t, s, service)
	for _, task := range originalTasks {
		assert.Equal(t, "v:1", task.Spec.GetContainer().Image)
		assert.Nil(t, task.LogDriver) // should be left alone
	}

	service.Spec.Task.GetContainer().Image = "v:2"
	service.Spec.Task.LogDriver = &api.Driver{Name: "tasklogdriver"}
	updater := NewUpdater(s, NewRestartSupervisor(s))
	updater.Run(ctx, cluster, service, getRunnableServiceTasks(t, s, service))
	updatedTasks := getRunnableServiceTasks(t, s, service)
	for _, task := range updatedTasks {
		assert.Equal(t, "v:2", task.Spec.GetContainer().Image)
		assert.Equal(t, service.Spec.Task.LogDriver, task.LogDriver) // pick up from task
	}

	service.Spec.Task.GetContainer().Image = "v:3"
	cluster.Spec.DefaultLogDriver = &api.Driver{Name: "clusterlogdriver"} // make cluster default logdriver.
	service.Spec.Update = &api.UpdateConfig{
		Parallelism: 1,
	}
	updater = NewUpdater(s, NewRestartSupervisor(s))
	updater.Run(ctx, cluster, service, getRunnableServiceTasks(t, s, service))
	updatedTasks = getRunnableServiceTasks(t, s, service)
	for _, task := range updatedTasks {
		assert.Equal(t, "v:3", task.Spec.GetContainer().Image)
		assert.Equal(t, service.Spec.Task.LogDriver, task.LogDriver) // still pick up from task
	}

	service.Spec.Task.GetContainer().Image = "v:4"
	service.Spec.Task.LogDriver = nil // use cluster default now.
//.........這裏部分代碼省略.........

func TestTaskHistory(t *testing.T) {
	ctx := context.Background()
	s := store.NewMemoryStore(nil)
	assert.NotNil(t, s)

	assert.NoError(t, s.Update(func(tx store.Tx) error {
		store.CreateCluster(tx, &api.Cluster{
			ID: identity.NewID(),
			Spec: api.ClusterSpec{
				Annotations: api.Annotations{
					Name: store.DefaultClusterName,
				},
				Orchestration: api.OrchestrationConfig{
					TaskHistoryRetentionLimit: 2,
				},
			},
		})
		return nil
	}))

	taskReaper := NewTaskReaper(s)
	defer taskReaper.Stop()
	orchestrator := NewReplicatedOrchestrator(s)
	defer orchestrator.Stop()

	watch, cancel := state.Watch(s.WatchQueue() /*state.EventCreateTask{}, state.EventUpdateTask{}*/)
	defer cancel()

	// Create a service with two instances specified before the orchestrator is
	// started. This should result in two tasks when the orchestrator
	// starts up.
	err := s.Update(func(tx store.Tx) error {
		j1 := &api.Service{
			ID: "id1",
			Spec: api.ServiceSpec{
				Annotations: api.Annotations{
					Name: "name1",
				},
				Mode: &api.ServiceSpec_Replicated{
					Replicated: &api.ReplicatedService{
						Replicas: 2,
					},
				},
				Task: api.TaskSpec{
					Restart: &api.RestartPolicy{
						Condition: api.RestartOnAny,
						Delay:     ptypes.DurationProto(0),
					},
				},
			},
		}
		assert.NoError(t, store.CreateService(tx, j1))
		return nil
	})
	assert.NoError(t, err)

	// Start the orchestrator.
	go func() {
		assert.NoError(t, orchestrator.Run(ctx))
	}()
	go taskReaper.Run()

	observedTask1 := watchTaskCreate(t, watch)
	assert.Equal(t, observedTask1.Status.State, api.TaskStateNew)
	assert.Equal(t, observedTask1.ServiceAnnotations.Name, "name1")

	observedTask2 := watchTaskCreate(t, watch)
	assert.Equal(t, observedTask2.Status.State, api.TaskStateNew)
	assert.Equal(t, observedTask2.ServiceAnnotations.Name, "name1")

	// Fail both tasks. They should both get restarted.
	updatedTask1 := observedTask1.Copy()
	updatedTask1.Status.State = api.TaskStateFailed
	updatedTask1.ServiceAnnotations = api.Annotations{Name: "original"}
	updatedTask2 := observedTask2.Copy()
	updatedTask2.Status.State = api.TaskStateFailed
	updatedTask2.ServiceAnnotations = api.Annotations{Name: "original"}
	err = s.Update(func(tx store.Tx) error {
		assert.NoError(t, store.UpdateTask(tx, updatedTask1))
		assert.NoError(t, store.UpdateTask(tx, updatedTask2))
		return nil
	})

	expectCommit(t, watch)
	expectTaskUpdate(t, watch)
	expectTaskUpdate(t, watch)
	expectCommit(t, watch)

	expectTaskUpdate(t, watch)
	observedTask3 := watchTaskCreate(t, watch)
	assert.Equal(t, observedTask3.Status.State, api.TaskStateNew)
	assert.Equal(t, observedTask3.ServiceAnnotations.Name, "name1")

	expectTaskUpdate(t, watch)
	observedTask4 := watchTaskCreate(t, watch)
	assert.Equal(t, observedTask4.Status.State, api.TaskStateNew)
	assert.Equal(t, observedTask4.ServiceAnnotations.Name, "name1")

	// Fail these replacement tasks. Since TaskHistory is set to 2, this
	// should cause the oldest tasks for each instance to get deleted.
//.........這裏部分代碼省略.........

func TestRemoveNodes(t *testing.T) {
	ts := newTestServer(t)
	defer ts.Stop()

	ts.Store.Update(func(tx store.Tx) error {
		store.CreateCluster(tx, &api.Cluster{
			ID: identity.NewID(),
			Spec: api.ClusterSpec{
				Annotations: api.Annotations{
					Name: store.DefaultClusterName,
				},
			},
		})
		return nil
	})

	r, err := ts.Client.ListNodes(context.Background(), &api.ListNodesRequest{})
	assert.NoError(t, err)
	assert.Empty(t, r.Nodes)

	createNode(t, ts, "id1", api.NodeRoleManager, api.NodeMembershipAccepted, api.NodeStatus_READY)
	r, err = ts.Client.ListNodes(context.Background(), &api.ListNodesRequest{})
	assert.NoError(t, err)
	assert.Len(t, r.Nodes, 1)

	createNode(t, ts, "id2", api.NodeRoleWorker, api.NodeMembershipAccepted, api.NodeStatus_READY)
	createNode(t, ts, "id3", api.NodeRoleWorker, api.NodeMembershipPending, api.NodeStatus_UNKNOWN)
	r, err = ts.Client.ListNodes(context.Background(), &api.ListNodesRequest{})
	assert.NoError(t, err)
	assert.Len(t, r.Nodes, 3)

	// Attempt to remove a ready node without force
	_, err = ts.Client.RemoveNode(context.Background(),
		&api.RemoveNodeRequest{
			NodeID: "id2",
			Force:  false,
		},
	)
	assert.Error(t, err)

	r, err = ts.Client.ListNodes(context.Background(),
		&api.ListNodesRequest{
			Filters: &api.ListNodesRequest_Filters{
				Roles: []api.NodeRole{api.NodeRoleManager, api.NodeRoleWorker},
			},
		},
	)
	assert.NoError(t, err)
	assert.Len(t, r.Nodes, 3)

	// Attempt to remove a ready node with force
	_, err = ts.Client.RemoveNode(context.Background(),
		&api.RemoveNodeRequest{
			NodeID: "id2",
			Force:  true,
		},
	)
	assert.NoError(t, err)

	r, err = ts.Client.ListNodes(context.Background(),
		&api.ListNodesRequest{
			Filters: &api.ListNodesRequest_Filters{
				Roles: []api.NodeRole{api.NodeRoleManager, api.NodeRoleWorker},
			},
		},
	)
	assert.NoError(t, err)
	assert.Len(t, r.Nodes, 2)

	clusterResp, err := ts.Client.ListClusters(context.Background(), &api.ListClustersRequest{})
	assert.NoError(t, err)
	require.Len(t, clusterResp.Clusters, 1)
	require.Len(t, clusterResp.Clusters[0].BlacklistedCertificates, 1)
	_, ok := clusterResp.Clusters[0].BlacklistedCertificates["id2"]
	assert.True(t, ok)

	// Attempt to remove a non-ready node without force
	_, err = ts.Client.RemoveNode(context.Background(),
		&api.RemoveNodeRequest{
			NodeID: "id3",
			Force:  false,
		},
	)
	assert.NoError(t, err)

	r, err = ts.Client.ListNodes(context.Background(),
		&api.ListNodesRequest{
			Filters: &api.ListNodesRequest_Filters{
				Roles: []api.NodeRole{api.NodeRoleManager, api.NodeRoleWorker},
			},
		},
	)
	assert.NoError(t, err)
	assert.Len(t, r.Nodes, 1)
}

func TestUpdateClusterRotateUnlockKey(t *testing.T) {
	ts := newTestServer(t)
	defer ts.Stop()
	// create a cluster with extra encryption keys, to make sure they exist
	cluster := createClusterObj("id", "name", api.AcceptancePolicy{}, ts.Server.rootCA)
	expected := make(map[string]*api.EncryptionKey)
	for i := 1; i <= 2; i++ {
		value := fmt.Sprintf("fake%d", i)
		expected[value] = &api.EncryptionKey{Subsystem: value, Key: []byte(value)}
		cluster.UnlockKeys = append(cluster.UnlockKeys, expected[value])
	}
	require.NoError(t, ts.Store.Update(func(tx store.Tx) error {
		return store.CreateCluster(tx, cluster)
	}))

	// we have to get the key from the memory store, since the cluster returned by the API is redacted
	getManagerKey := func() (managerKey *api.EncryptionKey) {
		ts.Store.View(func(tx store.ReadTx) {
			viewCluster := store.GetCluster(tx, cluster.ID)
			// no matter whether there's a manager key or not, the other keys should not have been affected
			foundKeys := make(map[string]*api.EncryptionKey)
			for _, eKey := range viewCluster.UnlockKeys {
				foundKeys[eKey.Subsystem] = eKey
			}
			for v, key := range expected {
				foundKey, ok := foundKeys[v]
				require.True(t, ok)
				require.Equal(t, key, foundKey)
			}
			managerKey = foundKeys[ca.ManagerRole]
		})
		return
	}

	validateListResult := func(expectedLocked bool) api.Version {
		r, err := ts.Client.ListClusters(context.Background(), &api.ListClustersRequest{
			Filters: &api.ListClustersRequest_Filters{
				NamePrefixes: []string{"name"},
			},
		})

		require.NoError(t, err)
		require.Len(t, r.Clusters, 1)
		require.Equal(t, expectedLocked, r.Clusters[0].Spec.EncryptionConfig.AutoLockManagers)
		require.Nil(t, r.Clusters[0].UnlockKeys) // redacted

		return r.Clusters[0].Meta.Version
	}

	// we start off with manager autolocking turned off
	version := validateListResult(false)
	require.Nil(t, getManagerKey())

	// Rotate unlock key without turning auto-lock on - key should still be nil
	_, err := ts.Client.UpdateCluster(context.Background(), &api.UpdateClusterRequest{
		ClusterID:      cluster.ID,
		Spec:           &cluster.Spec,
		ClusterVersion: &version,
		Rotation: api.KeyRotation{
			ManagerUnlockKey: true,
		},
	})
	require.NoError(t, err)
	version = validateListResult(false)
	require.Nil(t, getManagerKey())

	// Enable auto-lock only, no rotation boolean
	spec := cluster.Spec.Copy()
	spec.EncryptionConfig.AutoLockManagers = true
	_, err = ts.Client.UpdateCluster(context.Background(), &api.UpdateClusterRequest{
		ClusterID:      cluster.ID,
		Spec:           spec,
		ClusterVersion: &version,
	})
	require.NoError(t, err)
	version = validateListResult(true)
	managerKey := getManagerKey()
	require.NotNil(t, managerKey)

	// Rotate the manager key
	_, err = ts.Client.UpdateCluster(context.Background(), &api.UpdateClusterRequest{
		ClusterID:      cluster.ID,
		Spec:           spec,
		ClusterVersion: &version,
		Rotation: api.KeyRotation{
			ManagerUnlockKey: true,
		},
	})
	require.NoError(t, err)
	version = validateListResult(true)
	newManagerKey := getManagerKey()
	require.NotNil(t, managerKey)
	require.NotEqual(t, managerKey, newManagerKey)
	managerKey = newManagerKey

	// Just update the cluster without modifying unlock keys
	_, err = ts.Client.UpdateCluster(context.Background(), &api.UpdateClusterRequest{
		ClusterID:      cluster.ID,
		Spec:           spec,
		ClusterVersion: &version,
//.........這裏部分代碼省略.........

func TestUpdater(t *testing.T) {
	ctx := context.Background()
	s := store.NewMemoryStore(nil)
	assert.NotNil(t, s)
	defer s.Close()

	// Move tasks to their desired state.
	watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
	defer cancel()
	go func() {
		for {
			select {
			case e := <-watch:
				task := e.(state.EventUpdateTask).Task
				if task.Status.State == task.DesiredState {
					continue
				}
				err := s.Update(func(tx store.Tx) error {
					task = store.GetTask(tx, task.ID)
					task.Status.State = task.DesiredState
					return store.UpdateTask(tx, task)
				})
				assert.NoError(t, err)
			}
		}
	}()

	instances := 3
	cluster := &api.Cluster{
		// test cluster configuration propagation to task creation.
		Spec: api.ClusterSpec{
			Annotations: api.Annotations{
				Name: "default",
			},
		},
	}

	service := &api.Service{
		ID: "id1",
		Spec: api.ServiceSpec{
			Annotations: api.Annotations{
				Name: "name1",
			},
			Mode: &api.ServiceSpec_Replicated{
				Replicated: &api.ReplicatedService{
					Replicas: uint64(instances),
				},
			},
			Task: api.TaskSpec{
				Runtime: &api.TaskSpec_Container{
					Container: &api.ContainerSpec{
						Image: "v:1",
					},
				},
			},
			Update: &api.UpdateConfig{
				// avoid having Run block for a long time to watch for failures
				Monitor: gogotypes.DurationProto(50 * time.Millisecond),
			},
		},
	}

	err := s.Update(func(tx store.Tx) error {
		assert.NoError(t, store.CreateCluster(tx, cluster))
		assert.NoError(t, store.CreateService(tx, service))
		for i := 0; i < instances; i++ {
			assert.NoError(t, store.CreateTask(tx, orchestrator.NewTask(cluster, service, uint64(i), "")))
		}
		return nil
	})
	assert.NoError(t, err)

	originalTasks := getRunnableSlotSlice(t, s, service)
	for _, slot := range originalTasks {
		for _, task := range slot {
			assert.Equal(t, "v:1", task.Spec.GetContainer().Image)
			assert.Nil(t, task.LogDriver) // should be left alone
		}
	}

	service.Spec.Task.GetContainer().Image = "v:2"
	service.Spec.Task.LogDriver = &api.Driver{Name: "tasklogdriver"}
	updater := NewUpdater(s, restart.NewSupervisor(s), cluster, service)
	updater.Run(ctx, getRunnableSlotSlice(t, s, service))
	updatedTasks := getRunnableSlotSlice(t, s, service)
	for _, slot := range updatedTasks {
		for _, task := range slot {
			assert.Equal(t, "v:2", task.Spec.GetContainer().Image)
			assert.Equal(t, service.Spec.Task.LogDriver, task.LogDriver) // pick up from task
		}
	}

	service.Spec.Task.GetContainer().Image = "v:3"
	cluster.Spec.TaskDefaults.LogDriver = &api.Driver{Name: "clusterlogdriver"} // make cluster default logdriver.
	service.Spec.Update = &api.UpdateConfig{
		Parallelism: 1,
		Monitor:     gogotypes.DurationProto(50 * time.Millisecond),
	}
	updater = NewUpdater(s, restart.NewSupervisor(s), cluster, service)
	updater.Run(ctx, getRunnableSlotSlice(t, s, service))
//.........這裏部分代碼省略.........