Golang Logger.WithFields方法代碼示例

func (r *replication) ensureInReality(
	node types.NodeName,
	timeoutCh <-chan struct{},
	nodeLogger logging.Logger,
	targetSHA string,
) error {
	for {
		select {
		case <-r.quitCh:
			return errQuit
		case <-timeoutCh:
			return errTimeout
		case <-r.replicationCancelledCh:
			return errCancelled
		case <-time.After(5 * time.Second):
			man, err := r.queryReality(node)
			if err == pods.NoCurrentManifest {
				// if the pod key doesn't exist yet, that's okay just wait longer
			} else if err != nil {
				nodeLogger.WithErrorAndFields(err, logrus.Fields{
					"node": node,
				}).Errorln("Could not read reality for pod manifest")
			} else {
				receivedSHA, _ := man.SHA()
				if receivedSHA == targetSHA {
					nodeLogger.NoFields().Infoln("Node is current")
					return nil
				} else {
					nodeLogger.WithFields(logrus.Fields{"current": receivedSHA, "target": targetSHA}).Infoln("Waiting for current")
				}
			}
		}
	}
}

func (dsf *Farm) handleSessionExpiry(dsFields ds_fields.DaemonSet, dsLogger logging.Logger, err error) {
	dsLogger.WithFields(logrus.Fields{
		"ID":           dsFields.ID,
		"Name":         dsFields.Name,
		"NodeSelector": dsFields.NodeSelector.String(),
		"PodID":        dsFields.PodID,
	}).WithError(err).Errorln("Got error while locking daemon set in ds farm - session may be expired")
}

func (p *Preparer) tryRunHooks(hookType hooks.HookType, pod hooks.Pod, manifest *pods.Manifest, logger logging.Logger) {
	err := p.hooks.RunHookType(hookType, pod, manifest)
	if err != nil {
		logger.WithFields(logrus.Fields{
			"err":   err,
			"hooks": hookType,
		}).Warnln("Could not run hooks")
	}
}

func addHooks(preparerConfig *PreparerConfig, logger logging.Logger) {
	for _, dest := range preparerConfig.ExtraLogDestinations {
		logger.WithFields(logrus.Fields{
			"type": dest.Type,
			"path": dest.Path,
		}).Infoln("Adding log destination")
		logger.AddHook(dest.Type, dest.Path)
	}
}

func addHooks(preparerConfig *PreparerConfig, logger logging.Logger) {
	for _, dest := range preparerConfig.ExtraLogDestinations {
		logger.WithFields(logrus.Fields{
			"type": dest.Type,
			"path": dest.Path,
		}).Infoln("Adding log destination")
		if err := logger.AddHook(dest.Type, dest.Path); err != nil {
			logger.WithError(err).Errorf("Unable to add log hook. Proceeding.")
		}
	}
}

// check if a manifest satisfies the authorization requirement of this preparer
func (p *Preparer) authorize(manifest manifest.Manifest, logger logging.Logger) bool {
	err := p.authPolicy.AuthorizeApp(manifest, logger)
	if err != nil {
		if err, ok := err.(auth.Error); ok {
			logger.WithFields(err.Fields).Errorln(err)
		} else {
			logger.NoFields().Errorln(err)
		}
		return false
	}
	return true
}

func (r *replication) ensureHealthy(
	node types.NodeName,
	timeoutCh <-chan struct{},
	nodeLogger logging.Logger,
	aggregateHealth *podHealth,
) error {
	for {
		select {
		case <-r.quitCh:
			r.logger.Infoln("Caught quit signal during ensureHealthy")
			return errQuit
		case <-timeoutCh:
			r.logger.Infoln("Caught node timeout signal during ensureHealthy")
			return errTimeout
		case <-r.replicationCancelledCh:
			r.logger.Infoln("Caught cancellation signal during ensureHealthy")
			return errCancelled
		case <-time.After(time.Duration(*ensureHealthyPeriodMillis) * time.Millisecond):
			res, ok := aggregateHealth.GetHealth(node)
			if !ok {
				nodeLogger.WithFields(logrus.Fields{
					"node": node,
				}).Errorln("Could not get health, retrying")
				// Zero res should be treated like "critical"
			}
			id := res.ID
			status := res.Status
			// treat an empty threshold as "passing"
			threshold := health.Passing
			if r.threshold != "" {
				threshold = r.threshold
			}
			// is this status less than the threshold?
			if health.Compare(status, threshold) < 0 {
				nodeLogger.WithFields(logrus.Fields{"check": id, "health": status}).Infoln("Node is not healthy")
			} else {
				r.logger.WithField("node", node).Infoln("Node is current and healthy")
				return nil
			}
		}
	}
}

func runDirectory(dirpath string, environment []string, logger logging.Logger) error {
	entries, err := ioutil.ReadDir(dirpath)
	if os.IsNotExist(err) {
		logger.WithField("dir", dirpath).Debugln("Hooks not set up")
		return nil
	}
	if err != nil {
		return err
	}

	for _, f := range entries {
		fullpath := path.Join(dirpath, f.Name())
		executable := (f.Mode() & 0111) != 0
		if !executable {
			logger.WithField("path", fullpath).Warnln("Hook is not executable")
			continue
		}
		if f.IsDir() {
			continue
		}
		cmd := exec.Command(fullpath)
		hookOut := &bytes.Buffer{}
		cmd.Stdout = hookOut
		cmd.Stderr = hookOut
		cmd.Env = environment
		err := cmd.Run()
		if err != nil {
			logger.WithErrorAndFields(err, logrus.Fields{
				"path":   fullpath,
				"output": hookOut.String(),
			}).Warnf("Could not execute hook %s", f.Name())
		} else {
			logger.WithFields(logrus.Fields{
				"path":   fullpath,
				"output": hookOut.String(),
			}).Debugln("Executed hook")
		}
	}

	return nil
}

func (p *Preparer) installAndLaunchPod(newManifest *pods.Manifest, pod Pod, logger logging.Logger) bool {
	// do not remove the logger argument, it's not the same as p.Logger

	// get currently running pod to compare with the new pod
	realityPath := kp.RealityPath(p.node, newManifest.ID())
	currentManifest, _, err := p.store.Pod(realityPath)
	currentSHA := ""
	if currentManifest != nil {
		currentSHA, _ = currentManifest.SHA()
	}
	newSHA, _ := newManifest.SHA()

	// if new or the manifest is different, launch
	newOrDifferent := (err == pods.NoCurrentManifest) || (currentSHA != newSHA)
	if newOrDifferent {
		logger.WithFields(logrus.Fields{
			"old_sha": currentSHA,
			"sha":     newSHA,
			"pod":     newManifest.ID(),
		}).Infoln("SHA is new or different from old, will update")
	}

	// if the old manifest is corrupted somehow, re-launch since we don't know if this is an update.
	problemReadingCurrentManifest := (err != nil && err != pods.NoCurrentManifest)
	if problemReadingCurrentManifest {
		logger.WithFields(logrus.Fields{
			"sha":       newSHA,
			"inner_err": err,
		}).Errorln("Current manifest not readable, will relaunch")
	}

	if newOrDifferent || problemReadingCurrentManifest {
		p.tryRunHooks(hooks.BEFORE_INSTALL, pod, newManifest, logger)

		err = pod.Install(newManifest)
		if err != nil {
			// install failed, abort and retry
			logger.WithFields(logrus.Fields{
				"err": err,
			}).Errorln("Install failed")
			return false
		}

		err = pod.Verify(newManifest, p.authPolicy)
		if err != nil {
			logger.WithField("err", err).Errorln("Pod digest verification failed")
			p.tryRunHooks(hooks.AFTER_AUTH_FAIL, pod, newManifest, logger)
			return false
		}

		p.tryRunHooks(hooks.AFTER_INSTALL, pod, newManifest, logger)

		err = p.store.RegisterService(*newManifest, p.caPath)
		if err != nil {
			logger.WithField("err", err).Errorln("Service registration failed")
			return false
		}

		if currentManifest != nil {
			success, err := pod.Halt(currentManifest)
			if err != nil {
				logger.WithField("err", err).Errorln("Pod halt failed")
			} else if !success {
				logger.NoFields().Warnln("One or more launchables did not halt successfully")
			}
		}

		ok, err := pod.Launch(newManifest)
		if err != nil {
			logger.WithFields(logrus.Fields{
				"err": err,
			}).Errorln("Launch failed")
		} else {
			duration, err := p.store.SetPod(realityPath, *newManifest)
			if err != nil {
				logger.WithFields(logrus.Fields{
					"err":      err,
					"duration": duration,
				}).Errorln("Could not set pod in reality store")
			}

			p.tryRunHooks(hooks.AFTER_LAUNCH, pod, newManifest, logger)
		}
		return err == nil && ok
	}

	// TODO: shut down removed launchables between pod versions.
	return true
}

// Populates the given directory with executor scripts for each launch script of
// the given pod, which must be installed. Any orphaned executor scripts (from a
// past install, but no longer present in this pod) will be cleaned out.
func InstallHookScripts(dir string, hookPod *pods.Pod, manifest pods.Manifest, logger logging.Logger) error {
	err := os.MkdirAll(dir, 0755)
	if err != nil {
		return err
	}

	// TODO: globbing based on the structure of the name is gross, each hook pod
	// should have its own dir of scripts and running hooks should iterate over
	// the directories
	rmPattern := filepath.Join(dir, fmt.Sprintf("%s__*", hookPod.Id))
	matches, err := filepath.Glob(rmPattern)
	if err != nil {
		// error return from filepath.Glob is guaranteed to be ErrBadPattern
		return util.Errorf("error while removing old hook scripts: pattern %q is malformed", rmPattern)
	}
	for _, match := range matches {
		err = os.Remove(match)
		if err != nil {
			logger.WithErrorAndFields(err, logrus.Fields{"script_path": match}).Errorln("Could not remove old hook script")
		}
	}

	launchables, err := hookPod.Launchables(manifest)
	if err != nil {
		return err
	}
	for _, launchable := range launchables {
		if launchable.Type() != "hoist" {
			logger.WithFields(logrus.Fields{
				"id":   launchable.ID(),
				"type": launchable.Type(),
			}).Errorln("hook disabled: unsupported launchable type")
			continue
		}
		executables, err := launchable.Executables(runit.DefaultBuilder)
		if err != nil {
			return err
		}

		for _, executable := range executables {
			// Write a script to the event directory that executes the pod's executables
			// with the correct environment for that pod.
			scriptPath := filepath.Join(dir, executable.Service.Name)
			file, err := os.OpenFile(scriptPath, os.O_TRUNC|os.O_CREATE|os.O_WRONLY, 0744)
			defer file.Close()
			if err != nil {
				logger.WithErrorAndFields(err, logrus.Fields{"script_path": scriptPath}).Errorln("Could not open new hook script")
			}
			err = executable.WriteExecutor(file)
			if err != nil {
				logger.WithErrorAndFields(err, logrus.Fields{"script_path": scriptPath}).Errorln("Could not write new hook script")
			}
		}
		// for convenience as we do with regular launchables, make these ones
		// current under the launchable directory
		err = launchable.MakeCurrent()
		if err != nil {
			logger.WithErrorAndFields(err, logrus.Fields{"launchable_id": launchable.ID()}).
				Errorln("Could not set hook launchable to current")
		}
	}
	return nil
}