Golang logp.Debug函數代碼示例

func (eb *Winlogbeat) Cleanup(b *beat.Beat) error {
	logp.Debug("winlogbeat", "Dumping runtime metrics...")
	expvar.Do(func(kv expvar.KeyValue) {
		logp.Debug("winlogbeat", "%s=%s", kv.Key, kv.Value.String())
	})
	return nil
}

func (beat *Beat) ConfigSetup(beater Beater, inputConfig interface{}) {

	config := &ConfigSettings{
	//Input: inputConfig,
	}

	err := cfgfile.Read(config)

	beat.Config = *config

	if err != nil {
		logp.Debug("Log read error", "Error %v\n", err)
	}

	logp.Init(beat.Name, &beat.Config.Logging)

	logp.Debug("main", "Initializing output plugins")

	if err := publisher.Publisher.Init(beat.Config.Output, beat.Config.Shipper); err != nil {
		logp.Critical(err.Error())
		os.Exit(1)
	}

	beat.events = publisher.Publisher.Queue

	logp.Debug(beat.Name, "Init %s", beat.Name)

	if err := beater.Init(beat); err != nil {

		logp.Critical(err.Error())
		os.Exit(1)
	}
}

func (d *Dockerbeat) Config(b *beat.Beat) error {

	err := cfgfile.Read(&d.TbConfig, "")
	if err != nil {
		logp.Err("Error reading configuration file: %v", err)
		return err
	}

	//init the period
	if d.TbConfig.Input.Period != nil {
		d.period = time.Duration(*d.TbConfig.Input.Period) * time.Second
	} else {
		d.period = 1 * time.Second
	}
	//init the socket
	if d.TbConfig.Input.Socket != nil {
		d.socket = *d.TbConfig.Input.Socket
	} else {
		d.socket = "unix:///var/run/docker.sock" // default docker socket location
	}

	logp.Debug("dockerbeat", "Init dockerbeat")
	logp.Debug("dockerbeat", "Follow docker socket %q\n", d.socket)
	logp.Debug("dockerbeat", "Period %v\n", d.period)

	return nil
}

// Config Uwsgibeat according to uwsgibeat.yml.
func (ub *Uwsgibeat) Config(b *beat.Beat) error {
	err := cfgfile.Read(&ub.UbConfig, "")
	if err != nil {
		logp.Err("Error reading configuration file: %v", err)
		return err
	}

	var u string
	if ub.UbConfig.Input.URL != "" {
		u = ub.UbConfig.Input.URL
	} else {
		u = "127.0.0.1:1717"
	}
	ub.url, err = url.Parse(u)
	if err != nil {
		logp.Err("Invalid uWSGI stats server address: %v", err)
		return err
	}

	if ub.UbConfig.Input.Period != nil {
		ub.period = time.Duration(*ub.UbConfig.Input.Period) * time.Second
	} else {
		ub.period = 1 * time.Second
	}

	logp.Debug(selector, "Init uwsgibeat")
	logp.Debug(selector, "Watch %v", ub.url)
	logp.Debug(selector, "Period %v", ub.period)

	return nil
}

func FindSocketsOfPid(prefix string, pid int) (inodes []int64, err error) {

	dirname := filepath.Join(prefix, "/proc", strconv.Itoa(pid), "fd")
	procfs, err := os.Open(dirname)
	if err != nil {
		return []int64{}, fmt.Errorf("Open: %s", err)
	}
	names, err := procfs.Readdirnames(0)
	if err != nil {
		return []int64{}, fmt.Errorf("Readdirnames: %s", err)
	}

	for _, name := range names {
		link, err := os.Readlink(filepath.Join(dirname, name))
		if err != nil {
			logp.Debug("procs", "Readlink %s: %s", name, err)
			continue
		}

		if strings.HasPrefix(link, "socket:[") {
			inode, err := strconv.ParseInt(link[8:len(link)-1], 10, 64)
			if err != nil {
				logp.Debug("procs", "ParseInt: %s:", err)
				continue
			}

			inodes = append(inodes, int64(inode))
		}
	}

	return inodes, nil
}

// handleReadlineError handles error which are raised during reading file.
//
// If error is EOF, it will check for:
// * File truncated
// * Older then ignore_older
// * General file error
//
// If none of the above cases match, no error will be returned and file is kept open
//
// In case of a general error, the error itself is returned
func (h *Harvester) handleReadlineError(lastTimeRead time.Time, err error) error {

	if err == io.EOF {
		// Refetch fileinfo to check if the file was truncated or disappeared
		info, statErr := h.file.Stat()

		// This could happen if the file was removed / rotate after reading and before calling the stat function
		if statErr != nil {
			logp.Err("Unexpected error reading from %s; error: %s", h.Path, statErr)
			return statErr
		}

		// Check if file was truncated
		if info.Size() < h.Offset {
			logp.Debug("harvester", "File was truncated as offset > size. Begin reading file from offset 0: %s", h.Path)
			h.Offset = 0
			h.file.Seek(h.Offset, os.SEEK_SET)
		} else if age := time.Since(lastTimeRead); age > h.ProspectorConfig.IgnoreOlderDuration {
			// If the file hasn't change for longer the ignore_older, harvester stops and file handle will be closed.
			logp.Debug("harvester", "Stopping harvesting of file as older then ignore_old: ", h.Path, "Last change was: ", age)
			return err
		}
		// Do nothing in case it is just EOF, keep reading the file
		return nil
	} else {
		logp.Err("Unexpected state reading from %s; error: %s", h.Path, err)
		return err
	}
}

func (restart *ProspectorResume) Scan(files []cfg.FileConfig, persist map[string]*FileState, eventChan chan *FileEvent) {
	pendingProspectorCnt := 0

	// Prospect the globs/paths given on the command line and launch harvesters
	for _, fileconfig := range files {

		prospector := &Prospector{FileConfig: fileconfig}
		go prospector.Prospect(restart, eventChan)
		pendingProspectorCnt++
	}

	// Now determine which states we need to persist by pulling the events from the prospectors
	// When we hit a nil source a prospector had finished so we decrease the expected events
	logp.Debug("prospector", "Waiting for %d prospectors to initialise", pendingProspectorCnt)

	for event := range restart.Persist {
		if event.Source == nil {
			pendingProspectorCnt--
			if pendingProspectorCnt == 0 {
				break
			}
			continue
		}
		persist[*event.Source] = event
		logp.Debug("prospector", "Registrar will re-save state for %s", *event.Source)
	}

	logp.Info("All prospectors initialised with %d states to persist", len(persist))

}

// LoadConfig inits the config file and reads the default config information
// into Beat.Config. It exists the processes in case of errors.
func (b *Beat) LoadConfig() {

	err := cfgfile.Read(&b.Config, "")
	if err != nil {
		// logging not yet initialized, so using fmt.Printf
		fmt.Printf("Loading config file error: %v\n", err)
		os.Exit(1)
	}

	err = logp.Init(b.Name, &b.Config.Logging)
	if err != nil {
		fmt.Printf("Error initializing logging: %v\n", err)
		os.Exit(1)
	}

	// Disable stderr logging if requested by cmdline flag
	logp.SetStderr()

	logp.Debug("beat", "Initializing output plugins")

	if err := publisher.Publisher.Init(b.Name, b.Config.Output, b.Config.Shipper); err != nil {
		fmt.Printf("Error Initialising publisher: %v\n", err)
		logp.Critical(err.Error())
		os.Exit(1)
	}

	b.Events = publisher.Publisher.Client()

	logp.Debug("beat", "Init %s", b.Name)
}

func (p *Prospector) calculateResume(file string, fileinfo os.FileInfo, resume *ProspectorResume) (int64, bool) {
	last_state, is_found := resume.Files[file]

	if is_found && IsSameFile(file, fileinfo, last_state) {
		// We're resuming - throw the last state back downstream so we resave it
		// And return the offset - also force harvest in case the file is old and we're about to skip it
		resume.Persist <- last_state
		return last_state.Offset, true
	}

	if previous := p.isFileRenamedResumelist(file, fileinfo, resume.Files); previous != "" {
		// File has rotated between shutdown and startup
		// We return last state downstream, with a modified event source with the new file name
		// And return the offset - also force harvest in case the file is old and we're about to skip it
		logp.Debug("prospector", "Detected rename of a previously harvested file: %s -> %s", previous, file)
		last_state := resume.Files[previous]
		last_state.Source = &file
		resume.Persist <- last_state
		return last_state.Offset, true
	}

	if is_found {
		logp.Debug("prospector", "Not resuming rotated file: %s", file)
	}

	// New file so just start from an automatic position
	return 0, false
}

func (tb *Topbeat) Config(b *beat.Beat) error {

	err := cfgfile.Read(&tb.TbConfig, "")
	if err != nil {
		logp.Err("Error reading configuration file: %v", err)
		return err
	}

	if tb.TbConfig.Input.Period != nil {
		tb.period = time.Duration(*tb.TbConfig.Input.Period) * time.Second
	} else {
		tb.period = 1 * time.Second
	}
	if tb.TbConfig.Input.Procs != nil {
		tb.procs = *tb.TbConfig.Input.Procs
	} else {
		tb.procs = []string{".*"} //all processes
	}

	logp.Debug("topbeat", "Init toppbeat")
	logp.Debug("topbeat", "Follow processes %q\n", tb.procs)
	logp.Debug("topbeat", "Period %v\n", tb.period)

	return nil
}

func Publish(beat *beat.Beat, fb *Filebeat) {
	// Receives events from spool during flush
	for events := range fb.publisherChan {
		logp.Debug("filebeat", "Send events to output")

		pubEvents := make([]common.MapStr, 0, len(events))
		for _, event := range events {
			bEvent := common.MapStr{
				"timestamp": common.Time(time.Now()),
				"source":    event.Source,
				"offset":    event.Offset,
				"line":      event.Line,
				"message":   event.Text,
				"fields":    event.Fields,
				"fileinfo":  event.Fileinfo,
				"type":      "log",
			}

			pubEvents = append(pubEvents, bEvent)
		}

		beat.Events.PublishEvents(pubEvents, publisher.Sync)

		logp.Debug("filebeat", "Events sent: %d", len(events))

		// Tell the registrar that we've successfully sent these events
		fb.registrar.Channel <- events
	}
}

func (dns *Dns) ParseUdp(pkt *protos.Packet) {
	defer logp.Recover("Dns ParseUdp")

	logp.Debug("dns", "Parsing packet addressed with %s of length %d.",
		pkt.Tuple.String(), len(pkt.Payload))

	dnsPkt, err := decodeDnsPacket(pkt.Payload)
	if err != nil {
		// This means that malformed requests or responses are being sent or
		// that someone is attempting to the DNS port for non-DNS traffic. Both
		// are issues that a monitoring system should report.
		logp.Debug("dns", NonDnsPacketMsg+" addresses %s, length %d",
			pkt.Tuple.String(), len(pkt.Payload))
		return
	}

	dnsTuple := DnsTupleFromIpPort(&pkt.Tuple, TransportUdp, dnsPkt.ID)
	dnsMsg := &DnsMessage{
		Ts:           pkt.Ts,
		Tuple:        pkt.Tuple,
		CmdlineTuple: procs.ProcWatcher.FindProcessesTuple(&pkt.Tuple),
		Data:         dnsPkt,
		Length:       len(pkt.Payload),
	}

	if dnsMsg.Data.QR == Query {
		dns.receivedDnsRequest(&dnsTuple, dnsMsg)
	} else /* Response */ {
		dns.receivedDnsResponse(&dnsTuple, dnsMsg)
	}
}

// LoadConfig inits the config file and reads the default config information
// into Beat.Config. It exists the processes in case of errors.
func (b *Beat) LoadConfig() {

	err := cfgfile.Read(&b.Config, "")
	if err != nil {
		// logging not yet initialized, so using fmt.Printf
		fmt.Printf("%v\n", err)
		os.Exit(1)
	}

	err = logp.Init(b.Name, &b.Config.Logging)
	if err != nil {
		fmt.Printf("Error initializing logging: %v\n", err)
		os.Exit(1)
	}

	logp.Debug("beat", "Initializing output plugins")

	if err := publisher.Publisher.Init(b.Name, b.Version, b.Config.Output, b.Config.Shipper); err != nil {
		logp.Critical(err.Error())
		os.Exit(1)
	}

	b.Events = publisher.Publisher.Client()

	logp.Debug("beat", "Init %s", b.Name)
}

// Handles error during reading file. If EOF and nothing special, exit without errors
func (h *Harvester) handleReadlineError(lastTimeRead time.Time, err error) error {
	if err == io.EOF {
		// timed out waiting for data, got eof.
		// Check to see if the file was truncated
		info, _ := h.file.Stat()

		if h.ProspectorConfig.IgnoreOlder != "" {
			logp.Debug("harvester", "Ignore Unmodified After: %s", h.ProspectorConfig.IgnoreOlder)
		}

		if info.Size() < h.Offset {
			logp.Debug("harvester", "File truncated, seeking to beginning: %s", h.Path)
			h.file.Seek(0, os.SEEK_SET)
			h.Offset = 0
		} else if age := time.Since(lastTimeRead); age > h.ProspectorConfig.IgnoreOlderDuration {
			// if lastTimeRead was more than ignore older and ignore older is set, this file is probably dead. Stop watching it.
			logp.Debug("harvester", "Stopping harvest of ", h.Path, "last change was: ", age)
			return err
		}
	} else {
		logp.Err("Unexpected state reading from %s; error: %s", h.Path, err)
		return err
	}
	return nil
}

func (h *Harvester) initFileOffset(file *os.File) error {
	offset, err := file.Seek(0, os.SEEK_CUR)

	if h.Offset > 0 {
		// continue from last known offset

		logp.Debug("harvester",
			"harvest: %q position:%d (offset snapshot:%d)", h.Path, h.Offset, offset)
		_, err = file.Seek(h.Offset, os.SEEK_SET)
	} else if h.Config.TailFiles {
		// tail file if file is new and tail_files config is set

		logp.Debug("harvester",
			"harvest: (tailing) %q (offset snapshot:%d)", h.Path, offset)
		h.Offset, err = file.Seek(0, os.SEEK_END)

	} else {
		// get offset from file in case of encoding factory was
		// required to read some data.

		logp.Debug("harvester", "harvest: %q (offset snapshot:%d)", h.Path, offset)
		h.Offset = offset
	}

	return err
}