Golang Logger.Session方法代码示例

func NewMetrics(logger lager.Logger, backingStoresPath, depotPath string) Metrics {
	return &metrics{
		backingStoresPath: backingStoresPath,
		depotPath:         depotPath,
		logger:            logger.Session("metrics"),
	}
}

func (db *SQLDB) DeleteTask(logger lager.Logger, taskGuid string) error {
	logger = logger.Session("delete-task", lager.Data{"task_guid": taskGuid})
	logger.Info("starting")
	defer logger.Info("complete")

	return db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		task, err := db.fetchTaskForUpdate(logger, taskGuid, tx)
		if err != nil {
			logger.Error("failed-locking-task", err)
			return err
		}

		if task.State != models.Task_Resolving {
			err = models.NewTaskTransitionError(task.State, models.Task_Resolving)
			logger.Error("invalid-state-transition", err)
			return err
		}

		_, err = db.delete(logger, tx, tasksTable, "guid = ?", taskGuid)
		if err != nil {
			logger.Error("failed-deleting-task", err)
			return db.convertSQLError(err)
		}

		return nil
	})
}

func (h *TaskHandler) commonTaskByGuid(logger lager.Logger, w http.ResponseWriter, req *http.Request, version format.Version) {
	var err error
	logger = logger.Session("task-by-guid", lager.Data{"revision": 0})

	request := &models.TaskByGuidRequest{}
	response := &models.TaskResponse{}

	defer func() { exitIfUnrecoverable(logger, h.exitChan, response.Error) }()
	defer writeResponse(w, response)

	err = parseRequest(logger, req, request)
	if err != nil {
		logger.Error("failed-parsing-request", err)
		response.Error = models.ConvertError(err)
		return
	}

	response.Task, err = h.controller.TaskByGuid(logger, request.TaskGuid)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	if response.Task.TaskDefinition != nil {
		response.Task = response.Task.VersionDownTo(version)
	}
}

func (r *remoteClient) Unmount(logger lager.Logger, driverId string, volumeId string) error {
	logger = logger.Session("mount")
	logger.Info("start")
	defer logger.Info("end")

	unmountRequest := volman.UnmountRequest{driverId, volumeId}
	payload, err := json.Marshal(unmountRequest)
	if err != nil {
		return r.clientError(logger, err, fmt.Sprintf("Error marshalling JSON request %#v", unmountRequest))
	}

	request, err := r.reqGen.CreateRequest(volman.UnmountRoute, nil, bytes.NewReader(payload))

	if err != nil {
		return r.clientError(logger, err, fmt.Sprintf("Error creating request to %s", volman.UnmountRoute))
	}

	response, err := r.HttpClient.Do(request)
	if err != nil {
		return r.clientError(logger, err, fmt.Sprintf("Error unmounting volume %s", volumeId))
	}

	if response.StatusCode == 500 {
		var remoteError volman.Error
		if err := unmarshallJSON(logger, response.Body, &remoteError); err != nil {
			return r.clientError(logger, err, fmt.Sprintf("Error parsing 500 response from %s", volman.UnmountRoute))
		}
		return remoteError
	}

	return nil
}

func (db *SQLDB) CompleteTask(logger lager.Logger, taskGuid, cellID string, failed bool, failureReason, taskResult string) (*models.Task, error) {
	logger = logger.Session("complete-task", lager.Data{"task_guid": taskGuid, "cell_id": cellID})
	logger.Info("starting")
	defer logger.Info("complete")

	var task *models.Task

	err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
		var err error
		task, err = db.fetchTaskForUpdate(logger, taskGuid, tx)
		if err != nil {
			logger.Error("failed-locking-task", err)
			return err
		}

		if task.CellId != cellID && task.State == models.Task_Running {
			logger.Error("failed-task-already-running-on-different-cell", err)
			return models.NewRunningOnDifferentCellError(cellID, task.CellId)
		}

		if err = task.ValidateTransitionTo(models.Task_Completed); err != nil {
			logger.Error("failed-to-transition-task-to-completed", err)
			return err
		}

		return db.completeTask(logger, task, failed, failureReason, taskResult, tx)
	})

	return task, err
}

func (db *SQLDB) failExpiredPendingTasks(logger lager.Logger, expirePendingTaskDuration time.Duration) int64 {
	logger = logger.Session("fail-expired-pending-tasks")

	now := db.clock.Now()

	result, err := db.update(logger, db.db, tasksTable,
		SQLAttributes{
			"failed":             true,
			"failure_reason":     "not started within time limit",
			"result":             "",
			"state":              models.Task_Completed,
			"first_completed_at": now.UnixNano(),
			"updated_at":         now.UnixNano(),
		},
		"state = ? AND created_at < ?", models.Task_Pending, now.Add(-expirePendingTaskDuration).UnixNano())
	if err != nil {
		logger.Error("failed-query", err)
		return 0
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		logger.Error("failed-rows-affected", err)
		return 0
	}
	return rowsAffected
}

func (db *ETCDDB) resolveRestartableCrashedActualLRPS(logger lager.Logger, actualLRP *models.ActualLRP, starts *startRequests) func() {
	return func() {
		actualKey := actualLRP.ActualLRPKey

		logger = logger.Session("restart-crash", lager.Data{
			"process_guid": actualKey.ProcessGuid,
			"index":        actualKey.Index,
		})

		if actualLRP.State != models.ActualLRPStateCrashed {
			logger.Error("failed-actual-lrp-state-is-not-crashed", nil)
			return
		}

		logger.Debug("unclaiming-actual-lrp", lager.Data{"process_guid": actualLRP.ActualLRPKey.ProcessGuid, "index": actualLRP.ActualLRPKey.Index})
		_, err := db.unclaimActualLRP(logger, &actualLRP.ActualLRPKey, &actualLRP.ActualLRPInstanceKey)
		if err != nil {
			logger.Error("failed-unclaiming-crash", err)
			return
		}
		logger.Debug("succeeded-unclaiming-actual-lrp")

		starts.Add(logger, &actualKey)
	}
}

func (h *ActualLRPLifecycleHandler) StartActualLRP(logger lager.Logger, w http.ResponseWriter, req *http.Request) {
	var err error

	logger = logger.Session("start-actual-lrp")

	request := &models.StartActualLRPRequest{}
	response := &models.ActualLRPLifecycleResponse{}

	defer func() { exitIfUnrecoverable(logger, h.exitChan, response.Error) }()
	defer writeResponse(w, response)

	err = parseRequest(logger, req, request)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	before, after, err := h.db.StartActualLRP(logger, request.ActualLrpKey, request.ActualLrpInstanceKey, request.ActualLrpNetInfo)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	if before == nil {
		go h.actualHub.Emit(models.NewActualLRPCreatedEvent(after))
	} else if !before.Equal(after) {
		go h.actualHub.Emit(models.NewActualLRPChangedEvent(before, after))
	}
}

// Destroy deletes the container and the bundle directory
func (c *Containerizer) Destroy(log lager.Logger, handle string) error {
	log = log.Session("destroy", lager.Data{"handle": handle})

	log.Info("started")
	defer log.Info("finished")

	state, err := c.runtime.State(log, handle)
	if err != nil {
		log.Info("state-failed-skipping-delete", lager.Data{"error": err.Error()})
		return nil
	}

	log.Info("state", lager.Data{
		"state": state,
	})

	if state.Status == runrunc.CreatedStatus || state.Status == runrunc.StoppedStatus {
		if err := c.runtime.Delete(log, handle); err != nil {
			log.Error("delete-failed", err)
			return err
		}
	}

	return nil
}

func (h *ActualLRPLifecycleHandler) RemoveActualLRP(logger lager.Logger, w http.ResponseWriter, req *http.Request) {
	var err error
	logger = logger.Session("remove-actual-lrp")

	request := &models.RemoveActualLRPRequest{}
	response := &models.ActualLRPLifecycleResponse{}

	defer func() { exitIfUnrecoverable(logger, h.exitChan, response.Error) }()
	defer writeResponse(w, response)

	err = parseRequest(logger, req, request)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	beforeActualLRPGroup, err := h.db.ActualLRPGroupByProcessGuidAndIndex(logger, request.ProcessGuid, request.Index)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	err = h.db.RemoveActualLRP(logger, request.ProcessGuid, request.Index, request.ActualLrpInstanceKey)
	if err != nil {
		response.Error = models.ConvertError(err)
		return

	}
	go h.actualHub.Emit(models.NewActualLRPRemovedEvent(beforeActualLRPGroup))
}

func (h *ActualLRPLifecycleHandler) ClaimActualLRP(logger lager.Logger, w http.ResponseWriter, req *http.Request) {
	var err error
	logger = logger.Session("claim-actual-lrp")

	request := &models.ClaimActualLRPRequest{}
	response := &models.ActualLRPLifecycleResponse{}
	defer func() { exitIfUnrecoverable(logger, h.exitChan, response.Error) }()
	defer writeResponse(w, response)

	err = parseRequest(logger, req, request)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	before, after, err := h.db.ClaimActualLRP(logger, request.ProcessGuid, request.Index, request.ActualLrpInstanceKey)
	if err != nil {
		response.Error = models.ConvertError(err)
		return
	}

	if !after.Equal(before) {
		go h.actualHub.Emit(models.NewActualLRPChangedEvent(before, after))
	}
}

func (p *ExternalImageManager) Metrics(log lager.Logger, _, rootfs string) (garden.ContainerDiskStat, error) {
	log = log.Session("image-plugin-metrics", lager.Data{"rootfs": rootfs})
	log.Debug("start")
	defer log.Debug("end")

	imagePath := filepath.Dir(rootfs)
	cmd := exec.Command(p.binPath, "stats", imagePath)
	cmd.Stderr = lagregator.NewRelogger(log)
	outBuffer := bytes.NewBuffer([]byte{})
	cmd.Stdout = outBuffer

	if err := p.commandRunner.Run(cmd); err != nil {
		logData := lager.Data{"action": "stats", "stderr": outBuffer.String()}
		log.Error("external-image-manager-result", err, logData)
		return garden.ContainerDiskStat{}, fmt.Errorf("external image manager metrics failed: %s (%s)", outBuffer.String(), err)
	}

	var metrics map[string]map[string]uint64
	if err := json.NewDecoder(outBuffer).Decode(&metrics); err != nil {
		return garden.ContainerDiskStat{}, fmt.Errorf("parsing metrics: %s", err)
	}

	return garden.ContainerDiskStat{
		TotalBytesUsed:     metrics["disk_usage"]["total_bytes_used"],
		ExclusiveBytesUsed: metrics["disk_usage"]["exclusive_bytes_used"],
	}, nil
}

func (a *AUFSDiffSizer) DiffSize(logger lager.Logger, containerRootFSPath string) (uint64, error) {
	_, err := os.Stat(containerRootFSPath)
	if os.IsNotExist(err) {
		return 0, fmt.Errorf("get usage: %s", err)
	}

	log := logger.Session("diff-size", lager.Data{"path": containerRootFSPath})
	log.Debug("start")

	command := fmt.Sprintf("df -B 1 %s | tail -n1 | awk -v N=3 '{print $N}'", a.AUFSDiffPathFinder.GetDiffLayerPath((containerRootFSPath)))
	outbytes, err := exec.Command("sh", "-c", command).CombinedOutput()
	if err != nil {
		log.Error("df-failed", err)
		return 0, fmt.Errorf("get usage: df: %s, %s", err, string(outbytes))
	}

	var bytesUsed uint64
	if _, err := fmt.Sscanf(string(outbytes), "%d", &bytesUsed); err != nil {
		log.Error("scanf-failed", err, lager.Data{"out": string(outbytes)})
		return 0, nil
	}

	log.Debug("finished", lager.Data{"bytes": bytesUsed})
	return bytesUsed, nil
}

func (s *CgroupStarter) mountCgroup(logger lager.Logger, cgroupPath, subsystems string) error {
	logger = logger.Session("mount-cgroup", lager.Data{
		"path":       cgroupPath,
		"subsystems": subsystems,
	})

	logger.Info("started")

	if !s.isMountPoint(cgroupPath) {
		if err := os.MkdirAll(cgroupPath, 0755); err != nil {
			return fmt.Errorf("mkdir '%s': %s", cgroupPath, err)
		}

		cmd := exec.Command("mount", "-n", "-t", "cgroup", "-o", subsystems, "cgroup", cgroupPath)
		cmd.Stderr = logging.Writer(logger.Session("mount-cgroup-cmd"))
		if err := s.CommandRunner.Run(cmd); err != nil {
			return fmt.Errorf("mounting subsystems '%s' in '%s': %s", subsystems, cgroupPath, err)
		}
	} else {
		logger.Info("subsystems-already-mounted")
	}

	logger.Info("finished")

	return nil
}

func (e *IncreaseRunInfoColumnSize) Up(logger lager.Logger) error {
	logger = logger.Session("increase-run-info-column")
	logger.Info("starting")
	defer logger.Info("completed")

	return alterTables(logger, e.rawSQLDB, e.dbFlavor)
}