Golang Logger.Info方法代碼示例

// NewAddresses fetches EC2 IP address list from each region.
//
// If log is nil, defaultLogger is used instead.
func NewAddresses(clients *amazon.Clients, log logging.Logger) *Addresses {
	if log == nil {
		log = defaultLogger
	}
	a := newAddresses()
	var wg sync.WaitGroup
	var mu sync.Mutex // protects a.m
	for region, client := range clients.Regions() {
		wg.Add(1)
		go func(region string, client *amazon.Client) {
			defer wg.Done()
			addresses, err := client.Addresses()
			if err != nil {
				log.Error("[%s] fetching IP addresses error: %s", region, err)
				return
			}
			log.Info("[%s] fetched %d addresses", region, len(addresses))
			var ok bool
			mu.Lock()
			if _, ok = a.m[client]; !ok {
				a.m[client] = addresses
			}
			mu.Unlock()
			if ok {
				panic(fmt.Errorf("[%s] duplicated client=%p: %+v", region, client, addresses))
			}
		}(region, client)
	}
	wg.Wait()
	return a
}

// NewMultiInstances fetches EC2 instance list from each region.
func NewMultiInstances(clients *amazon.Clients, log logging.Logger) *MultiInstances {
	if log == nil {
		log = defaultLogger
	}
	var m = newMultiInstances()
	var wg sync.WaitGroup
	var mu sync.Mutex // protects m.m
	for region, client := range clients.Regions() {
		wg.Add(1)
		go func(region string, client *amazon.Client) {
			defer wg.Done()
			instances, err := client.Instances()
			if err != nil {
				log.Error("[%s] fetching instances error: %s", region, err)
				return
			}
			log.Info("[%s] fetched %d instances", region, len(instances))
			i := make(Instances, len(instances))
			for _, instance := range instances {
				i[aws.StringValue(instance.InstanceId)] = instance
			}
			var ok bool
			mu.Lock()
			if _, ok = m.m[client]; !ok {
				m.m[client] = i
			}
			mu.Unlock()
			if ok {
				panic(fmt.Errorf("[%s] duplicated client=%p: %+v", region, client, i))
			}
		}(region, client)
	}
	wg.Wait()
	return m
}

func (r *Remote) createNewMachineFromKite(c *KodingClient, log logging.Logger) error {
	var host string
	host, err := r.hostFromClient(c.Client)
	if err != nil {
		log.Error("Unable to extract host from *kite.Client. err:%s", err)
		return err
	}

	// For backwards compatibility, check if the host already has a name
	// in the cache.
	//
	// If the name does not exist in the host the string will be empty, and
	// Machines.Add() will create a new unique name.
	//
	// If the string *does* exist then we use that, remove it from the map,
	// and save the map to avoid dealing with this next time.
	name, ok := r.machineNamesCache[host]
	if ok {
		log.Info(
			"Using legacy name, and removing it from database. name:%s, host:%s",
			name, host,
		)
		delete(r.machineNamesCache, host)
		// Should't bother exiting here, not a terrible error.. but not good, either.
		// Log it for knowledge, and move on.
		if err := r.saveMachinesNames(); err != nil {
			log.Error("Failed to save machine names. err:%s", err)
		}
	}

	// Name can be empty here, since Machines.Add() will handle creation
	// of the name.
	machineMeta := machine.MachineMeta{
		URL:          c.URL,
		IP:           host,
		Hostname:     c.Hostname,
		Username:     c.Username,
		Name:         name,
		MachineLabel: c.MachineLabel,
		Teams:        c.Teams,
	}

	newMachine, err := machine.NewMachine(machineMeta, r.log, c.Client)
	if err != nil {
		return err
	}

	if err = r.machines.Add(newMachine); err != nil {
		log.Error("Unable to Add new machine to *machine.Machines. err:%s", err)
		return err
	}

	return nil
}

func setDefaults(log logging.Logger) {
	group, err := modelhelper.GetGroup(models.Channel_KODING_NAME)
	if err != nil {
		log.Error("err while fetching koding group: %s", err.Error())
		return
	}

	log.Debug("mongo group found")

	setPublicChannel(log, group)
	setChangeLogChannel(log, group)
	log.Info("socialApi defaults are created")
}

// New creates a new terraformer
func New(conf *Config, log logging.Logger) (*Terraformer, error) {
	ls, err := storage.NewFile(conf.LocalStorePath, log)
	if err != nil {
		return nil, fmt.Errorf("error while creating local store: %s", err)
	}

	var rs storage.Interface
	if conf.AWS.Key != "" && conf.AWS.Secret != "" && conf.AWS.Bucket != "" {
		s3, err := storage.NewS3(conf.AWS.Key, conf.AWS.Secret, conf.AWS.Bucket, log)
		if err != nil {
			return nil, fmt.Errorf("error while creating remote store: %s", err)
		}

		rs = s3
	} else {
		remotePath := filepath.Dir(conf.LocalStorePath)
		if conf.AWS.Bucket != "" {
			remotePath = filepath.Join(remotePath, conf.AWS.Bucket)
		} else {
			remotePath = filepath.Join(remotePath, filepath.Base(conf.LocalStorePath)+".remote")
		}

		local, err := storage.NewFile(remotePath, log)
		if err != nil {
			return nil, fmt.Errorf("error while creating remote store on local: %s", err)
		}

		log.Info("no S3 credentials, using local storage: %s", remotePath)

		rs = local
	}

	c, err := kodingcontext.New(ls, rs, log, conf.Debug)
	if err != nil {
		return nil, err
	}

	t := &Terraformer{
		Log:       log,
		Metrics:   common.MustInitMetrics(Name),
		Debug:     conf.Debug,
		Context:   c,
		Config:    conf,
		closeChan: make(chan struct{}),
	}

	t.handleSignals()

	return t, nil
}

func setChangeLogChannel(log logging.Logger, group *kodingmodels.Group) {

	c := models.NewChannel()
	selector := map[string]interface{}{
		"type_constant": models.Channel_TYPE_ANNOUNCEMENT,
		"group_name":    models.Channel_KODING_NAME,
	}

	// if err is nil
	// it means we already have that channel
	err := c.One(bongo.NewQS(selector))
	if err != nil && err != bongo.RecordNotFound {
		log.Error("err while fetching changelog channel:", err.Error())
		return
	}

	if err == bongo.RecordNotFound {
		log.Error("postgres changelog couldn't found, creating it")

		acc, err := createChannelOwner(group)
		if err != nil {
			log.Error(err.Error())
			return
		}

		c.Name = "changelog"
		c.CreatorId = acc.Id
		c.GroupName = models.Channel_KODING_NAME
		c.TypeConstant = models.Channel_TYPE_ANNOUNCEMENT
		c.PrivacyConstant = models.Channel_PRIVACY_PRIVATE
		if err := c.Create(); err != nil {
			log.Error("err while creating the koding channel:", err.Error())
			return
		}
	}

	socialApiAnnouncementChannelId := strconv.FormatInt(c.Id, 10)
	if group.SocialApiAnnouncementChannelId == socialApiAnnouncementChannelId {
		log.Info("mongo and postgres socialApiAnnouncementChannel ids are same")
		return
	}

	log.Debug("mongo and postgres socialApiAnnouncementChannel ids are different, fixing it")
	if err := updateGroupPartially(group.Id, "socialApiAnnouncementChannelId", strconv.FormatInt(c.Id, 10)); err != nil {
		log.Error("err while udpating socialApiAnnouncementChannelId:", err.Error())
		return
	}
}

func MustInitBongo(
	appName string,
	eventExchangeName string,
	c *Config,
	log logging.Logger,
	metrics *metrics.Metrics,
	debug bool,
) *bongo.Bongo {
	rmqConf := &rabbitmq.Config{
		Host:     c.Mq.Host,
		Port:     c.Mq.Port,
		Username: c.Mq.Login,
		Password: c.Mq.Password,
		Vhost:    c.Mq.Vhost,
	}

	bConf := &broker.Config{
		RMQConfig:    rmqConf,
		ExchangeName: eventExchangeName,
		QOS:          10,
	}

	db := MustInitDB(c, log, debug)

	broker := broker.New(appName, bConf, log)
	// set metrics for broker
	broker.Metrics = metrics

	bongo := bongo.New(broker, db, log)
	err := bongo.Connect()
	if err != nil {
		log.Fatal("Error while starting bongo, exiting err: %s", err.Error())
	}

	log.Info("Caching disabled: %v", c.DisableCaching)
	if !c.DisableCaching {
		redisConn, err := InitRedisConn(c)
		if err != nil {
			log.Critical("Bongo couldnt connect to redis, caching will not be available Err: %s", err.Error())
		} else {
			bongo.Cache = redisConn
		}
	}

	return bongo
}

// startIntervalerIfNeeded starts the given rsync interval, logs any errors, and adds the
// resulting Intervaler to the Mount struct for later Stoppage.
func startIntervalerIfNeeded(log logging.Logger, remoteMachine *machine.Machine, c *rsync.Client, opts rsync.SyncIntervalOpts) {
	log = log.New("startIntervalerIfNeeded")

	if opts.Interval <= 0 {
		// Using debug, because this is not an error - just informative.
		log.Debug(
			"startIntervalerIfNeeded() called with interval:%d. Cannot start Intervaler",
			opts.Interval,
		)
		return
	}

	log.Info("Creating and starting RSync SyncInterval")
	intervaler, err := c.SyncInterval(opts)
	if err != nil {
		log.Error("rsync SyncInterval returned an error:%s", err)
		return
	}

	remoteMachine.Intervaler = intervaler
}

func registerSignalHandler(l *asgd.LifeCycle, log logging.Logger) chan struct{} {
	done := make(chan struct{}, 1)

	go func() {
		signals := make(chan os.Signal, 1)
		signal.Notify(signals)

		signal := <-signals
		switch signal {
		case syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGSTOP, syscall.SIGKILL:
			log.Info("recieved exit signal, closing...")
			err := l.Close()
			if err != nil {
				log.Critical(err.Error())
			}
			close(done)
		}

	}()
	return done
}

// UpdateCommand updates this binary if there's an update available.
func UpdateCommand(c *cli.Context, log logging.Logger, _ string) int {
	if len(c.Args()) != 0 {
		cli.ShowCommandHelp(c, "update")
		return 1
	}

	var (
		forceUpdate    = c.Bool("force")
		klientVersion  = c.Int("klient-version")
		klientChannel  = c.String("klient-channel")
		kdVersion      = c.Int("kd-version")
		kdChannel      = c.String("kd-channel")
		continueUpdate = c.Bool("continue")
	)

	if kdChannel == "" {
		kdChannel = config.Environment
	}

	if klientChannel == "" {
		klientChannel = config.Environment
	}

	// Create and open the log file, to be safe in case it's missing.
	f, err := createLogFile(LogFilePath)
	if err != nil {
		fmt.Println(`Error: Unable to open log files.`)
	} else {
		log.SetHandler(logging.NewWriterHandler(f))
		log.Info("Update created log file at %q", LogFilePath)
	}

	if !shouldTryUpdate(kdVersion, klientVersion, forceUpdate) {
		yesUpdate, err := checkUpdate()
		if err != nil {
			log.Error("Error checking if update is available. err:%s", err)
			fmt.Println(FailedCheckingUpdateAvailable)
			return 1
		}

		if !yesUpdate {
			fmt.Println("No update available.")
			return 0
		} else {
			fmt.Println("An update is available.")
		}
	}

	if kdVersion == 0 {
		var err error

		kdVersion, err = latestVersion(config.Konfig.Endpoints.KDLatest.Public.String())
		if err != nil {
			log.Error("Error fetching klientctl update version. err: %s", err)
			fmt.Println(FailedCheckingUpdateAvailable)
			return 1
		}
	}

	if klientVersion == 0 {
		var err error

		klientVersion, err = latestVersion(config.Konfig.Endpoints.KlientLatest.Public.String())
		if err != nil {
			log.Error("Error fetching klient update version. err: %s", err)
			fmt.Println(FailedCheckingUpdateAvailable)
			return 1
		}
	}

	klientPath := filepath.Join(KlientDirectory, "klient")
	klientctlPath := filepath.Join(KlientctlDirectory, "kd")
	klientUrl := config.S3Klient(klientVersion, klientChannel)
	klientctlUrl := config.S3Klientctl(kdVersion, kdChannel)

	// If --continue is not passed, download kd and then call the new kd binary with
	// `kd update --continue`, so that the new code handles updates to klient.sh,
	// service, and any migration code needed.
	if !continueUpdate {
		// Only show this message once.
		fmt.Println("Updating...")

		if err := downloadRemoteToLocal(klientctlUrl, klientctlPath); err != nil {
			log.Error("Error downloading klientctl. err:%s", err)
			fmt.Println(FailedDownloadUpdate)
			return 1
		}

		flags := flagsFromContext(c)
		// Very important to pass --continue for the subprocess.
		// --force also helps ensure it updates, since the subprocess is technically
		// the latest KD version.
		flags = append([]string{"update", "--continue=true", "--force=true"}, flags...)
		log.Info("%s", flags)
		cmd := exec.Command(klientctlPath, flags...)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		if err := cmd.Run(); err != nil {
			log.Error("error during --continue update. err: %s", err)
//.........這裏部分代碼省略.........

// The implementation of InstallCommandFactory, with an error return. This
// allows us to track the error metrics.
func InstallCommandFactory(c *cli.Context, log logging.Logger, _ string) (exit int, err error) {
	if len(c.Args()) != 1 {
		cli.ShowCommandHelp(c, "install")
		return 1, errors.New("incorrect cli usage: no args")
	}

	// Now that we created the logfile, set our logger handler to use that newly created
	// file, so that we can log errors during installation.
	f, err := createLogFile(LogFilePath)
	if err != nil {
		fmt.Println(`Error: Unable to open log files.`)
	} else {
		log.SetHandler(logging.NewWriterHandler(f))
		log.Info("Installation created log file at %q", LogFilePath)
	}

	// Track all failed installations.
	defer func() {
		if err != nil {
			log.Error(err.Error())
			metrics.TrackInstallFailed(err.Error(), config.VersionNum())
		}
	}()

	authToken := c.Args().Get(0)

	// We need to check if the authToken is somehow empty, because klient
	// will default to user/pass if there is no auth token (despite setting
	// the token flag)
	if strings.TrimSpace(authToken) == "" {
		cli.ShowCommandHelp(c, "install")
		return 1, errors.New("incorrect cli usage: missing token")
	}

	// Create the installation dir, if needed.
	if err := os.MkdirAll(KlientDirectory, 0755); err != nil {
		log.Error(
			"Error creating klient binary directory(s). path:%s, err:%s",
			KlientDirectory, err,
		)
		fmt.Println(FailedInstallingKlient)
		return 1, fmt.Errorf("failed creating klient binary: %s", err)
	}

	klientBinPath := filepath.Join(KlientDirectory, "klient")

	// TODO: Accept `kd install --user foo` flag to replace the
	// environ checking.
	klientSh := klientSh{
		User:          konfig.CurrentUser.Username,
		KlientBinPath: klientBinPath,
	}

	if err := klientSh.Create(filepath.Join(KlientDirectory, "klient.sh")); err != nil {
		err = fmt.Errorf("error writing klient.sh file: %s", err)
		fmt.Println(FailedInstallingKlient)
		return 1, err
	}

	fmt.Println("Downloading...")

	version, err := latestVersion(config.Konfig.Endpoints.KlientLatest.Public.String())
	if err != nil {
		fmt.Printf(FailedDownloadingKlient)
		return 1, fmt.Errorf("error getting latest klient version: %s", err)
	}

	if err := downloadRemoteToLocal(config.S3Klient(version, config.Environment), klientBinPath); err != nil {
		fmt.Printf(FailedDownloadingKlient)
		return 1, fmt.Errorf("error downloading klient binary: %s", err)
	}

	fmt.Printf("Created %s\n", klientBinPath)
	fmt.Printf(`Authenticating you to the %s

`, config.KlientName)

	cmd := exec.Command(klientBinPath, "-register",
		"-token", authToken,
		"--kontrol-url", strings.TrimSpace(c.String("kontrol")),
	)

	var errBuf bytes.Buffer

	// Note that we are *only* printing to Stdout. This is done because
	// Klient logs error messages to Stderr, and we want to control the UX for
	// that interaction.
	//
	// TODO: Logg Klient's Stderr message on error, if any.
	cmd.Stdout = os.Stdout
	cmd.Stdin = os.Stdin
	cmd.Stderr = &errBuf

	if err := cmd.Run(); err != nil {
		err = fmt.Errorf("error registering klient: %s, klient stderr: %s", err, errBuf.String())
		fmt.Println(FailedRegisteringKlient)
		return 1, err
	}
//.........這裏部分代碼省略.........