Golang logp.Info函数代码示例

func (l *UdpInput) Run(output chan common.MapStr) error {
	logp.Info("[UdpInput] Running UDP Input")
	addr := net.UDPAddr{
		Port: l.Port,
		IP:   net.ParseIP("0.0.0.0"),
	}
	server, err := net.ListenUDP("udp", &addr)
	server.SetReadBuffer(1048576)

	if err != nil {
		logp.Err("couldn't start listening: " + err.Error())
		return nil
	}

	logp.Info("[UdpInput] Listening on port %d", l.Port)

	i := 0
	for {
		i++
		buf := make([]byte, 4096)
		rlen, addr, err := server.ReadFromUDP(buf)
		if err != nil {
			logp.Err("couldn't read from UDP: " + err.Error())
		}
		go l.handlePacket(buf, rlen, i, addr, output)
	}
	return nil
}

func (reader *ReaderType) Run(output chan common.MapStr) error {
	logp.Info("Attempting to start %d inputs", len(reader.Input))

	for _, plugin := range reader.Input {
		err := plugin.Run(output)
		if err != nil {
			logp.Err("Fail to start input plugin %s : %s", plugin.InputType(), err)
			return err
		} else {
			logp.Info("Started input plugin %s", plugin.InputType())
		}
	}
	return nil
}

func (l *TailInput) Init(config inputs.MothershipConfig) error {
	l.Type = "tail"
	l.Config = config
	l.FileName = config.Filename
	l.RollTime = 30 * time.Minute

	logp.Info("[TailInput] Initialized with file " + l.FileName)
	return nil
}

func (l *SyslogInput) Init(config inputs.MothershipConfig) error {

	l.Config = config
	if config.Port == 0 {
		return errors.New("No Input Port specified")
	}
	l.Port = config.Port

	if config.Type == "" {
		return errors.New("No Event Type specified")
	}
	l.Type = config.Type

	logp.Info("[SyslogInput] Using Port %d", l.Port)
	logp.Info("[SyslogInput] Adding Event Type %s", l.Type)

	return nil
}

func (l *ProcfsInput) Init(config inputs.MothershipConfig) error {

	l.Config = config

	l.Tick_interval = config.Tick_interval

	logp.Info("[ProcfsInput] Initialized, using tick interval " + strconv.Itoa(l.Tick_interval))

	return nil
}

func writeHeapProfile(filename string) {
	f, err := os.Create(filename)
	if err != nil {
		logp.Err("Failed creating file %s: %s", filename, err)
		return
	}
	pprof.WriteHeapProfile(f)
	f.Close()

	logp.Info("Created memory profile file %s.", filename)
}

func (l *PackagesInput) doStuff(output chan common.MapStr) {

	now := func() time.Time {
		t := time.Now()
		return t
	}

	// construct event and write it to channel
	event := common.MapStr{}

	//text := "null event"
	//event["message"] = &text

	event["message"] = "packages event"
	event["type"] = l.Type

	event.EnsureTimestampField(now)
	event.EnsureCountField()

	/////////////
	cmd := exec.Command("/bin/rpm", "-qa", "--queryformat", "%{NAME}:::%{VERSION}:::%{ARCH}##")
	var out bytes.Buffer
	cmd.Stdout = &out
	err := cmd.Run()
	if err != nil {
		logp.Info("Error occurred")
		return
	}

	items := strings.Split(out.String(), "##")
	rpmList := make([]RPMPackage, 0)

	for _, line := range items {
		item := strings.Split(line, ":::")
		if len(item) < 3 {
			continue
		}

		pkg := RPMPackage{
			Name:    item[0],
			Version: item[1],
			Arch:    item[2],
		}

		rpmList = append(rpmList, pkg)
	}

	event["packages"] = rpmList
	output <- event

}

func (out *KafkaOutput) Init(config outputs.MothershipConfig, topology_expire int) error {

	if config.Host == "" {
		return errors.New("No Kafka brokers specified")
	}
	out.BrokerList = strings.Split(config.Host, ",")

	if config.Topic == "" {
		return errors.New("No Kafka topic specified")
	}
	out.Topic = config.Topic

	out.Timeout = 5 * time.Second
	if config.Timeout != 0 {
		out.Timeout = time.Duration(config.Timeout) * time.Second
	}

	out.FlushInterval = 1000 * time.Millisecond
	out.ReconnectInterval = time.Duration(1) * time.Second
	if config.Reconnect_interval != 0 {
		out.ReconnectInterval = time.Duration(config.Reconnect_interval) * time.Second
	}

	//sarama.Logger = log.New(os.Stdout, "[KafkaOutput]", log.LstdFlags)
	logp.Info("[KafkaOutput] Using Kafka brokers %s", config.Host)
	logp.Info("[KafkaOutput] Kafka connection timeout %s", out.Timeout)
	logp.Info("[KafkaOutput] Kafka reconnect interval %s", out.ReconnectInterval)
	logp.Info("[KafkaOutput] Kafka flushing interval %s", out.FlushInterval)
	logp.Info("[KafkaOutput] Publishing to topic %s", out.Topic)

	out.sendingQueue = make(chan KafkaQueueMsg, 1000)

	out.Reconnect()
	go out.SendMessagesGoroutine()

	return nil
}

func (l *TcpInput) Run(output chan common.MapStr) error {
	logp.Info("[TcpInput] Running TCP Input")
	server, err := net.Listen("tcp", ":"+strconv.Itoa(l.Port))
	if err != nil {
		logp.Err("couldn't start listening: " + err.Error())
		return nil
	}
	logp.Info("[TcpInput] Listening on port %d", l.Port)

	// dispatch the master listen thread
	go func(server net.Listener) {
		for {
			// accept incoming connections
			conn, err := server.Accept()
			if err != nil {
				logp.Err("Error accepting: ", err.Error())
			} else {
				// dispatch individual connection handler threads
				go l.handleConn(conn, output)
			}
		}
	}(server)
	return nil
}

func (l *StdinInput) doStuff(output chan common.MapStr) {
	reader := bufio.NewReader(os.Stdin)
	buffer := new(bytes.Buffer)

	var source string = fmt.Sprintf("%s:%s", os.Getenv("REMOTE_HOST"), os.Getenv("REMOTE_PORT"))
	var ssl_client_dn string = os.Getenv("SSL_CLIENT_DN")
	var offset int64 = 0
	var line uint64 = 0
	var read_timeout = 10 * time.Second

	logp.Debug("stdinput", "Handling New Connection from %s", source)

	now := func() time.Time {
		t := time.Now()
		return t
	}

	for {
		text, bytesread, err := l.readline(reader, buffer, read_timeout)

		if err != nil {
			logp.Info("Unexpected state reading from %v; error: %s\n", os.Getenv("SSL_CLIENT_DN"), err)
			return
		}

		logp.Debug("stdinputlines", "New Line: %s", &text)

		line++

		event := common.MapStr{}
		event["ssl_client_dn"] = &ssl_client_dn
		event["source"] = &source
		event["offset"] = offset
		event["line"] = line
		event["message"] = text
		event["type"] = l.Type

		event.EnsureTimestampField(now)
		event.EnsureCountField()

		offset += int64(bytesread)

		logp.Debug("stdinput", "InputEvent: %v", event)
		output <- event // ship the new event downstream
		os.Stdout.Write([]byte("OK"))
	}
	logp.Debug("stdinput", "Closed Connection from %s", source)
}

func LoadGeoIPData(config Geoip) *libgeo.GeoIP {

	geoip_paths := []string{
		"/usr/share/GeoIP/GeoIP.dat",
		"/usr/local/var/GeoIP/GeoIP.dat",
	}
	if config.Paths != nil {
		geoip_paths = *config.Paths
	}
	if len(geoip_paths) == 0 {
		// disabled
		return nil
	}

	// look for the first existing path
	var geoip_path string
	for _, path := range geoip_paths {
		fi, err := os.Lstat(path)
		if err != nil {
			continue
		}

		if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
			// follow symlink
			geoip_path, err = filepath.EvalSymlinks(path)
			if err != nil {
				logp.Warn("Could not load GeoIP data: %s", err.Error())
				return nil
			}
		} else {
			geoip_path = path
		}
		break
	}

	if len(geoip_path) == 0 {
		logp.Warn("Couldn't load GeoIP database")
		return nil
	}

	geoLite, err := libgeo.Load(geoip_path)
	if err != nil {
		logp.Warn("Could not load GeoIP data: %s", err.Error())
	}

	logp.Info("Loaded GeoIP data from: %s", geoip_path)
	return geoLite
}

func (l *TcpInput) handleConn(client net.Conn, output chan common.MapStr) {
	reader := bufio.NewReader(client)
	buffer := new(bytes.Buffer)

	var source string = client.RemoteAddr().String()
	var offset int64 = 0
	var line uint64 = 0
	var read_timeout = 10 * time.Second

	logp.Debug("tcpinput", "Handling New Connection from %s", source)

	now := func() time.Time {
		t := time.Now()
		return t
	}

	for {
		text, bytesread, err := l.readline(reader, buffer, read_timeout)

		if err != nil {
			logp.Info("Unexpected state reading from %v; error: %s\n", client.RemoteAddr().String, err)
			return
		}

		logp.Debug("tcpinputlines", "New Line: %s", &text)

		line++

		event := common.MapStr{}
		event["source"] = &source
		event["offset"] = offset
		event["line"] = line
		event["message"] = text
		event["type"] = l.Type

		event.EnsureTimestampField(now)
		event.EnsureCountField()

		offset += int64(bytesread)

		logp.Debug("tcpinput", "InputEvent: %v", event)
		output <- event // ship the new event downstream
		client.Write([]byte("OK"))
	}
	logp.Debug("tcpinput", "Closed Connection from %s", source)
}

func newInputInstance(name string) inputs.InputInterface {
	logp.Info("creating new instance of type %s", name)
	switch name {
	case "tcp":
		return new(tcp.TcpInput)
	case "udp":
		return new(udp.UdpInput)
	case "tail":
		return new(tail.TailInput)
	case "syslog":
		return new(syslog.SyslogInput)
	case "procfs":
		return new(procfs.ProcfsInput)
	case "packages":
		return new(packages.PackagesInput)
	case "null":
		return new(null.NullInput)
	}
	return nil
}

func (reader *ReaderType) Init(inputMap map[string]inputs.MothershipConfig) error {
	logp.Info("reader input config", inputMap)

	var globalConf inputs.MothershipConfig

	for inputId, config := range inputMap {
		// default instance 0
		inputName, instance := inputId, "0"
		if strings.Contains(inputId, "_") {
			// otherwise grok tcp_2 as inputName = tcp, instance = 2
			sv := strings.Split(inputId, "_")
			inputName, instance = sv[0], sv[1]
		}
		logp.Info(fmt.Sprintf("input type: %s instance: %s\n", inputName, instance))
		logp.Debug("reader", "instance config: %s", config)

		// handling for "global" config section
		if inputName == "global" {
			logp.Info("global input configuration read")
			globalConf = config
		}

		plugin := newInputInstance(inputName)
		if plugin != nil && config.Enabled {
			config.Normalize(globalConf)
			err := plugin.Init(config)
			if err != nil {
				logp.Err("Fail to initialize %s plugin as input: %s", inputName, err)
				return err
			} else {
				logp.Info("Initialized %s plugin as input", inputName)
			}
			reader.Input = append(reader.Input, plugin)
		}
	}

	if len(reader.Input) == 0 {
		logp.Info("No inputs are defined. Please define one under the input section.")
		return errors.New("No input are defined. Please define one under the input section.")
	} else {
		logp.Info("%d inputs defined", len(reader.Input))
	}

	return nil
}

func DropPrivileges(config RunOptions) error {
	var err error

	if config.Uid == nil {
		// not found, no dropping privileges but no err
		return nil
	}

	if config.Gid == nil {
		return errors.New("GID must be specified for dropping privileges")
	}

	logp.Info("Switching to user: %d.%d", config.Uid, config.Gid)

	if err = syscall.Setgid(*config.Gid); err != nil {
		return fmt.Errorf("setgid: %s", err.Error())
	}

	if err = syscall.Setuid(*config.Uid); err != nil {
		return fmt.Errorf("setuid: %s", err.Error())
	}

	return nil
}