Golang store.GetService函數代碼示例

// UpdateService updates a Service referenced by ServiceID with the given ServiceSpec.
// - Returns `NotFound` if the Service is not found.
// - Returns `InvalidArgument` if the ServiceSpec is malformed.
// - Returns `Unimplemented` if the ServiceSpec references unimplemented features.
// - Returns an error if the update fails.
func (s *Server) UpdateService(ctx context.Context, request *api.UpdateServiceRequest) (*api.UpdateServiceResponse, error) {
	if request.ServiceID == "" || request.ServiceVersion == nil {
		return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
	}
	if err := validateServiceSpec(request.Spec); err != nil {
		return nil, err
	}

	var service *api.Service
	s.store.View(func(tx store.ReadTx) {
		service = store.GetService(tx, request.ServiceID)
	})
	if service == nil {
		return nil, grpc.Errorf(codes.NotFound, "service %s not found", request.ServiceID)
	}

	if request.Spec.Endpoint != nil && !reflect.DeepEqual(request.Spec.Endpoint, service.Spec.Endpoint) {
		if err := s.checkPortConflicts(request.Spec, request.ServiceID); err != nil {
			return nil, err
		}
	}

	err := s.store.Update(func(tx store.Tx) error {
		service = store.GetService(tx, request.ServiceID)
		if service == nil {
			return nil
		}
		// temporary disable network update
		if request.Spec != nil && !reflect.DeepEqual(request.Spec.Networks, service.Spec.Networks) {
			return errNetworkUpdateNotSupported
		}

		// orchestrator is designed to be stateless, so it should not deal
		// with service mode change (comparing current config with previous config).
		// proper way to change service mode is to delete and re-add.
		if request.Spec != nil && reflect.TypeOf(service.Spec.Mode) != reflect.TypeOf(request.Spec.Mode) {
			return errModeChangeNotAllowed
		}
		service.Meta.Version = *request.ServiceVersion
		service.Spec = *request.Spec.Copy()

		// Reset update status
		service.UpdateStatus = nil

		return store.UpdateService(tx, service)
	})
	if err != nil {
		return nil, err
	}
	if service == nil {
		return nil, grpc.Errorf(codes.NotFound, "service %s not found", request.ServiceID)
	}
	return &api.UpdateServiceResponse{
		Service: service,
	}, nil
}

func (u *Updater) completeUpdate(ctx context.Context, serviceID string) {
	log.G(ctx).Debugf("update of service %s complete", serviceID)

	err := u.store.Update(func(tx store.Tx) error {
		service := store.GetService(tx, serviceID)
		if service == nil {
			return nil
		}
		if service.UpdateStatus == nil {
			// The service was changed since we started this update
			return nil
		}
		if service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED {
			service.UpdateStatus.State = api.UpdateStatus_ROLLBACK_COMPLETED
			service.UpdateStatus.Message = "rollback completed"
		} else {
			service.UpdateStatus.State = api.UpdateStatus_COMPLETED
			service.UpdateStatus.Message = "update completed"
		}
		service.UpdateStatus.CompletedAt = ptypes.MustTimestampProto(time.Now())

		return store.UpdateService(tx, service)
	})

	if err != nil {
		log.G(ctx).WithError(err).Errorf("failed to mark update of service %s complete", serviceID)
	}
}

// UpdateService updates a Service referenced by ServiceID with the given ServiceSpec.
// - Returns `NotFound` if the Service is not found.
// - Returns `InvalidArgument` if the ServiceSpec is malformed.
// - Returns `Unimplemented` if the ServiceSpec references unimplemented features.
// - Returns an error if the update fails.
func (s *Server) UpdateService(ctx context.Context, request *api.UpdateServiceRequest) (*api.UpdateServiceResponse, error) {
	if request.ServiceID == "" || request.ServiceVersion == nil {
		return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
	}
	if err := validateServiceSpec(request.Spec); err != nil {
		return nil, err
	}

	var service *api.Service
	err := s.store.Update(func(tx store.Tx) error {
		service = store.GetService(tx, request.ServiceID)
		if service == nil {
			return nil
		}
		service.Meta.Version = *request.ServiceVersion
		service.Spec = *request.Spec.Copy()
		return store.UpdateService(tx, service)
	})
	if err != nil {
		return nil, err
	}
	if service == nil {
		return nil, grpc.Errorf(codes.NotFound, "service %s not found", request.ServiceID)
	}
	return &api.UpdateServiceResponse{
		Service: service,
	}, nil
}

func (r *Orchestrator) handleTaskChange(ctx context.Context, t *api.Task) {
	// If we already set the desired state past TaskStateRunning, there is no
	// further action necessary.
	if t.DesiredState > api.TaskStateRunning {
		return
	}

	var (
		n       *api.Node
		service *api.Service
	)
	r.store.View(func(tx store.ReadTx) {
		if t.NodeID != "" {
			n = store.GetNode(tx, t.NodeID)
		}
		if t.ServiceID != "" {
			service = store.GetService(tx, t.ServiceID)
		}
	})

	if !orchestrator.IsReplicatedService(service) {
		return
	}

	if t.Status.State > api.TaskStateRunning ||
		(t.NodeID != "" && invalidNode(n)) {
		r.restartTasks[t.ID] = struct{}{}
	}
}

func (r *Supervisor) waitRestart(ctx context.Context, oldDelay *delayedStart, cluster *api.Cluster, taskID string) {
	// Wait for the last restart delay to elapse.
	select {
	case <-oldDelay.doneCh:
	case <-ctx.Done():
		return
	}

	// Start the next restart
	err := r.store.Update(func(tx store.Tx) error {
		t := store.GetTask(tx, taskID)
		if t == nil {
			return nil
		}
		if t.DesiredState > api.TaskStateRunning {
			return nil
		}
		service := store.GetService(tx, t.ServiceID)
		if service == nil {
			return nil
		}
		return r.Restart(ctx, tx, cluster, service, *t)
	})

	if err != nil {
		log.G(ctx).WithError(err).Errorf("failed to restart task after waiting for previous restart")
	}
}

func (u *Updater) pauseUpdate(ctx context.Context, serviceID, message string) {
	log.G(ctx).Debugf("pausing update of service %s", serviceID)

	err := u.store.Update(func(tx store.Tx) error {
		service := store.GetService(tx, serviceID)
		if service == nil {
			return nil
		}
		if service.UpdateStatus == nil {
			// The service was updated since we started this update
			return nil
		}

		if service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED {
			service.UpdateStatus.State = api.UpdateStatus_ROLLBACK_PAUSED
		} else {
			service.UpdateStatus.State = api.UpdateStatus_PAUSED
		}
		service.UpdateStatus.Message = message

		return store.UpdateService(tx, service)
	})

	if err != nil {
		log.G(ctx).WithError(err).Errorf("failed to pause update of service %s", serviceID)
	}
}

// UpdateService updates a Service referenced by ServiceID with the given ServiceSpec.
// - Returns `NotFound` if the Service is not found.
// - Returns `InvalidArgument` if the ServiceSpec is malformed.
// - Returns `Unimplemented` if the ServiceSpec references unimplemented features.
// - Returns an error if the update fails.
func (s *Server) UpdateService(ctx context.Context, request *api.UpdateServiceRequest) (*api.UpdateServiceResponse, error) {
	if request.ServiceID == "" || request.ServiceVersion == nil {
		return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
	}
	if err := validateServiceSpec(request.Spec); err != nil {
		return nil, err
	}

	var service *api.Service
	err := s.store.Update(func(tx store.Tx) error {
		service = store.GetService(tx, request.ServiceID)
		if service == nil {
			return nil
		}
		// temporary disable network update
		if request.Spec != nil && !reflect.DeepEqual(request.Spec.Networks, service.Spec.Networks) {
			return errNetworkUpdateNotSupported
		}

		service.Meta.Version = *request.ServiceVersion
		service.Spec = *request.Spec.Copy()
		return store.UpdateService(tx, service)
	})
	if err != nil {
		return nil, err
	}
	if service == nil {
		return nil, grpc.Errorf(codes.NotFound, "service %s not found", request.ServiceID)
	}
	return &api.UpdateServiceResponse{
		Service: service,
	}, nil
}

func (a *Allocator) allocateService(ctx context.Context, nc *networkContext, s *api.Service) error {
	if s.Spec.Endpoint != nil {
		if s.Endpoint == nil {
			s.Endpoint = &api.Endpoint{
				Spec: s.Spec.Endpoint.Copy(),
			}
		}

		// The service is trying to expose ports to the external
		// world. Automatically attach the service to the ingress
		// network only if it is not already done.
		if len(s.Spec.Endpoint.Ports) != 0 {
			var found bool
			for _, vip := range s.Endpoint.VirtualIPs {
				if vip.NetworkID == ingressNetwork.ID {
					found = true
					break
				}
			}

			if !found {
				s.Endpoint.VirtualIPs = append(s.Endpoint.VirtualIPs,
					&api.Endpoint_VirtualIP{NetworkID: ingressNetwork.ID})
			}
		}
	}

	if err := nc.nwkAllocator.ServiceAllocate(s); err != nil {
		nc.unallocatedServices[s.ID] = s
		return err
	}

	if err := a.store.Update(func(tx store.Tx) error {
		for {
			err := store.UpdateService(tx, s)

			if err != nil && err != store.ErrSequenceConflict {
				return fmt.Errorf("failed updating state in store transaction for service %s: %v", s.ID, err)
			}

			if err == store.ErrSequenceConflict {
				storeService := store.GetService(tx, s.ID)
				storeService.Endpoint = s.Endpoint
				s = storeService
				continue
			}

			break
		}
		return nil
	}); err != nil {
		if err := nc.nwkAllocator.ServiceDeallocate(s); err != nil {
			log.G(ctx).WithError(err).Errorf("failed rolling back allocation of service %s: %v", s.ID, err)
		}

		return err
	}

	return nil
}

func (u *Updater) rollbackUpdate(ctx context.Context, serviceID, message string) {
	log.G(ctx).Debugf("starting rollback of service %s", serviceID)

	var service *api.Service
	err := u.store.Update(func(tx store.Tx) error {
		service = store.GetService(tx, serviceID)
		if service == nil {
			return nil
		}
		if service.UpdateStatus == nil {
			// The service was updated since we started this update
			return nil
		}

		service.UpdateStatus.State = api.UpdateStatus_ROLLBACK_STARTED
		service.UpdateStatus.Message = message

		if service.PreviousSpec == nil {
			return errors.New("cannot roll back service because no previous spec is available")
		}
		service.Spec = *service.PreviousSpec
		service.PreviousSpec = nil

		return store.UpdateService(tx, service)
	})

	if err != nil {
		log.G(ctx).WithError(err).Errorf("failed to start rollback of service %s", serviceID)
		return
	}
}

func (r *ReplicatedOrchestrator) resolveService(ctx context.Context, task *api.Task) *api.Service {
	if task.ServiceID == "" {
		return nil
	}
	var service *api.Service
	r.store.View(func(tx store.ReadTx) {
		service = store.GetService(tx, task.ServiceID)
	})
	return service
}

func (g *Orchestrator) addTask(ctx context.Context, batch *store.Batch, service *api.Service, nodeID string) {
	task := orchestrator.NewTask(g.cluster, service, 0, nodeID)

	err := batch.Update(func(tx store.Tx) error {
		if store.GetService(tx, service.ID) == nil {
			return nil
		}
		return store.CreateTask(tx, task)
	})
	if err != nil {
		log.G(ctx).WithError(err).Errorf("global orchestrator: failed to create task")
	}
}

// restartTask calls the restart supervisor's Restart function, which
// sets a task's desired state to dead and restarts it if the restart
// policy calls for it to be restarted.
func (g *GlobalOrchestrator) restartTask(ctx context.Context, taskID string, serviceID string) {
	err := g.store.Update(func(tx store.Tx) error {
		t := store.GetTask(tx, taskID)
		if t == nil || t.DesiredState > api.TaskStateRunning {
			return nil
		}
		service := store.GetService(tx, serviceID)
		if service == nil {
			return nil
		}
		return g.restarts.Restart(ctx, tx, service, *t)
	})
	if err != nil {
		log.G(ctx).WithError(err).Errorf("global orchestrator: restartTask transaction failed")
	}
}

// GetService returns a Service given a ServiceID.
// - Returns `InvalidArgument` if ServiceID is not provided.
// - Returns `NotFound` if the Service is not found.
func (s *Server) GetService(ctx context.Context, request *api.GetServiceRequest) (*api.GetServiceResponse, error) {
	if request.ServiceID == "" {
		return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
	}

	var service *api.Service
	s.store.View(func(tx store.ReadTx) {
		service = store.GetService(tx, request.ServiceID)
	})
	if service == nil {
		return nil, grpc.Errorf(codes.NotFound, "service %s not found", request.ServiceID)
	}

	return &api.GetServiceResponse{
		Service: service,
	}, nil
}

func (a *Allocator) commitAllocatedService(ctx context.Context, batch *store.Batch, s *api.Service) error {
	if err := batch.Update(func(tx store.Tx) error {
		err := store.UpdateService(tx, s)

		if err == store.ErrSequenceConflict {
			storeService := store.GetService(tx, s.ID)
			storeService.Endpoint = s.Endpoint
			err = store.UpdateService(tx, storeService)
		}

		return errors.Wrapf(err, "failed updating state in store transaction for service %s", s.ID)
	}); err != nil {
		if err := a.netCtx.nwkAllocator.ServiceDeallocate(s); err != nil {
			log.G(ctx).WithError(err).Errorf("failed rolling back allocation of service %s", s.ID)
		}

		return err
	}

	return nil
}

func (r *Orchestrator) tickTasks(ctx context.Context) {
	if len(r.restartTasks) > 0 {
		_, err := r.store.Batch(func(batch *store.Batch) error {
			for taskID := range r.restartTasks {
				err := batch.Update(func(tx store.Tx) error {
					// TODO(aaronl): optimistic update?
					t := store.GetTask(tx, taskID)
					if t != nil {
						if t.DesiredState > api.TaskStateRunning {
							return nil
						}

						service := store.GetService(tx, t.ServiceID)
						if !orchestrator.IsReplicatedService(service) {
							return nil
						}

						// Restart task if applicable
						if err := r.restarts.Restart(ctx, tx, r.cluster, service, *t); err != nil {
							return err
						}
					}
					return nil
				})
				if err != nil {
					log.G(ctx).WithError(err).Errorf("Orchestrator task reaping transaction failed")
				}
			}
			return nil
		})

		if err != nil {
			log.G(ctx).WithError(err).Errorf("orchestrator task removal batch failed")
		}

		r.restartTasks = make(map[string]struct{})
	}
}