Exemplo n.º 1
0
func (tail *Tail) seek() {
	fi, err := tail.Stat()
	if err != nil {
		logs.Error("Can't stat file: %s", err)
		return
	}
	off := tail.Offset()
	if tail.maxBackfill >= 0 {
		if off < fi.Size()-tail.maxBackfill {
			off = fi.Size() - tail.maxBackfill
		}
	}
	_, err = tail.handle.Seek(off, 0)
	if err != nil {
		logs.Error("Can't seek file: %s", err)
		return
	}
}
Exemplo n.º 2
0
func (tail *Tail) StartWatching() {
	go func() {
		fi, err := tail.Stat()
		if err != nil {
			logs.Error("Can't stat file: %s", err)
			return
		}
		c := tail.Watcher.ChangeEvents(&tomb.Tomb{}, fi)
		go tail.pollChannel(c.Modified)
		go tail.pollChannel(c.Truncated)
		go tail.pollChannel(c.Deleted)
	}()
}
Exemplo n.º 3
0
func (parser *RegexpParser) Consume(bytes []byte, counter *int64) {
	parser.buffer = append(parser.buffer, bytes...)
	logs.Debug("consuming %d bytes of %s", len(bytes), parser.file)
	l := len(parser.buffer)
	if l > parser.maxLineSize {
		off := l - parser.maxLineSize
		logs.Debug("chopping %d bytes off buffer (was: %d, max: %d)", off, l, parser.maxLineSize)
		atomic.AddInt64(counter, int64(off))
		parser.buffer = parser.buffer[off:]
	}
	for {
		m := parser.compiled.FindSubmatchIndex(parser.buffer)
		if m == nil {
			return
		}

		hasher := sha1.New()

		out := make(map[string]Column)
		out["_offset"] = Column{Integer, Simple, atomic.LoadInt64(counter)}
		out["_file"] = Column{String, Simple, parser.file}
		out["_time"] = Column{Timestamp, Simple, StandardTimeProvider.Now().Unix()}
		out["_group"] = Column{String, Simple, parser.group}
		out["_hostname"] = Column{String, Simple, parser.hostname}
		for _, spec := range parser.fields {
			g := spec.Group
			if g < 0 || g > len(m)/2 {
				logs.Error("spec group out of range: alias: %s, name: %s, g: %d", spec.Alias, spec.Name, g)
				panic(-1)
			}
			if m[g*2] == -1 {
				continue
			}
			s := string(parser.buffer[m[g*2]:m[g*2+1]])
			switch spec.Type {
			case Timestamp:
				t, err := time.Parse(spec.Format, s)
				if err != nil {
					logs.Warn("date parse error: %s", err)
				} else {
					if t.Year() == 0 {
						now := StandardTimeProvider.Now()
						adjusted := time.Date(now.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), t.Location())
						if adjusted.After(now) {
							adjusted = time.Date(now.Year()-1, t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), t.Location())
						}
						t = adjusted
					}
					out[spec.Alias] = Column{Timestamp, spec.Treatment, t.Unix()}
				}
			case String:
				if spec.Treatment == Tokens {
					out[spec.Alias] = Column{Tokens, spec.Treatment, spec.Pattern.FindAllString(s, -1)}
				} else if spec.Treatment == Hash {
					hasher.Reset()
					hasher.Write([]byte(spec.Salt))
					hasher.Write([]byte(s))
					sha := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
					out[spec.Alias] = Column{Tokens, spec.Treatment, sha}
				} else {
					out[spec.Alias] = Column{String, spec.Treatment, s}
				}
			case Integer:
				n, err := strconv.ParseInt(s, 10, 64)
				if err == nil {
					out[spec.Alias] = Column{spec.Type, spec.Treatment, n}
				}
			case Double:
				n, err := strconv.ParseFloat(s, 64)
				if err == nil {
					out[spec.Alias] = Column{spec.Type, spec.Treatment, n}
				}

			default:
				panic(nil)
			}
		}
		parser.output <- out
		atomic.AddInt64(counter, int64(m[1]))

		parser.buffer = parser.buffer[m[1]:]
	}
	logs.Debug("done with %s", parser.file)
}
Exemplo n.º 4
0
func main() {
	flag.Parse()
	runtime.GOMAXPROCS(*cpus)

	// set the logger path
	handle, err := os.OpenFile(*logFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
	if err != nil {
		logs.Warn("Unable to open log file %s, using stderr: %s", *logFile, err)
	} else {
		logs.Logger = log.New(handle, "", log.LstdFlags|log.Lshortfile)
	}

	// Check whether we're in debug mode
	if *debug {
		logs.SetLevel(logs.DEBUG)
		logs.Debug("logging at DEBUG")
	} else {
		logs.SetLevel(logs.INFO)
	}

	if *name == "unknown" {
		*name, err = os.Hostname()
		if err != nil {
			logs.Warn("Unable to determine hostname: %s", err)
		}
	}

	// Read the config files
	config, err := dendrite.NewConfig(*configFile, *name)
	if err != nil {
		logs.Fatal("Can't read configuration: %s", err)
	}

	// Link up all of the objects
	ch := make(chan dendrite.Record, 100)
	logs.Debug("original %s", ch)
	dests := config.CreateDestinations()
	groups := config.CreateAllTailGroups(ch)

	// If any of our destinations talk back, log it.
	go func() {
		reader := bufio.NewReader(dests.Reader())
		for {
			str, err := reader.ReadString('\n')
			if err == io.EOF {
				logs.Debug("eof")
				time.Sleep(1 * time.Second)
			} else if err != nil {
				logs.Error("error reading: %s", err)
			} else {
				logs.Info("received: %s", str)
			}
		}
	}()

	// Do the event loop
	finished := make(chan bool, 0)
	go dests.Consume(ch, finished)
	if *quitAfter >= 0 {
		start := time.Now()
		logs.Debug("starting the poll")
		i := 0
		for {
			i++
			if i%10 == 0 {
				groups.Refresh()
			}
			groups.Poll()
			if time.Now().Sub(start) >= time.Duration((*quitAfter)*float64(time.Second)) {
				break
			}
		}
	} else {
		logs.Debug("starting the loop")
		groups.Loop()
	}
	logs.Info("Closing...")
	close(ch)
	<-finished
	logs.Info("Goodbye!")
}