func (c *Cron) Stop() {
log.Warn("Stopping cron")
c.Cron.Stop()
log.Info("Waiting")
c.wg.Wait()
log.Info("Exiting")
}
func (s *StartedInstance) delete(dockerId string, mux *sync.Mutex) {
mux.Lock()
delete((*s), dockerId)
log.Info("available instances: ", (*s))
mux.Unlock()
runtime.Gosched()
}
func LoadConfig() {
var err error
c, err = server.NewConfig("logyard_sieve", Config{})
if err != nil {
log.Fatalf("Unable to load logyard_sieve config; %v", err)
}
log.Info(getConfig().Events)
}
// LocalNodeId returns the node ID of the local node.
func LocalNodeId() string {
once.Do(func() {
var err error
nodeid, err = server.LocalIP()
if err != nil {
common.Fatal("Failed to determine IP addr: %v", err)
}
log.Info("Local Node ID: ", nodeid)
})
return nodeid
}
func main() {
log.Info("Starting docker_events")
pub := logyard.Broker.NewPublisherMust()
defer pub.Stop()
server.MarkRunning("docker_events")
for event := range docker_events.Stream() {
SendToLogyard(pub, event)
}
}
func (s *StartedInstance) checkInstanceAndUpdate(n int, dockerId string, mux *sync.Mutex) bool {
var exist bool
mux.Lock()
if _, key_exist := (*s)[dockerId]; !key_exist {
(*s)[dockerId] = n
log.Info("all available instances:", (*s))
exist = true
} else {
exist = false
}
mux.Unlock()
runtime.Gosched()
return exist
}
func main() {
go common.RegisterTailCleanup()
major, minor, patch := gozmq.Version()
log.Infof("Starting systail (zeromq %d.%d.%d)", major, minor, patch)
systail.LoadConfig()
nodeid, err := server.LocalIP()
if err != nil {
common.Fatal("Failed to determine IP addr: %v", err)
}
log.Info("Host IP: ", nodeid)
tailers := []*tail.Tail{}
logFiles := systail.GetConfig().LogFiles
fmt.Printf("%+v\n", logFiles)
if len(logFiles) == 0 {
common.Fatal("No log files exist in configuration.")
}
for name, logfile := range logFiles {
t, err := tailLogFile(name, logfile, nodeid)
if err != nil {
common.Fatal("%v", err)
}
tailers = append(tailers, t)
}
server.MarkRunning("systail")
for _, tail := range tailers {
err := tail.Wait()
if err != nil {
log.Errorf("Cannot tail [%s]: %s", tail.Filename, err)
}
}
// we don't expect any of the tailers to exit with or without
// error.
log.Error("No file left to tail; exiting.")
os.Exit(1)
}
func NewCron(schedule string, command string, args []string) *Cron {
log.Infof("Running per schedule: %v", schedule)
c := &Cron{cron.New(), &sync.WaitGroup{}}
c.AddFunc(schedule, func() {
c.wg.Add(1)
log.Infof("Executing: %v %v", command, strings.Join(args, " "))
err := execute(command, args)
if err != nil {
log.Warnf("Failed: %v", err)
} else {
log.Info("Succeeded")
}
c.wg.Done()
})
return c
}
func tailLogFile(
name string, filepath string, nodeid string) (*tail.Tail, error) {
if filepath == "" {
filepath = fmt.Sprintf("/s/logs/%s.log", name)
}
log.Info("Tailing... ", filepath)
t, err := tail.TailFile(filepath, tail.Config{
MaxLineSize: systail.GetConfig().MaxRecordSize,
MustExist: false,
Follow: true,
// ignore existing content, to support subsequent re-runs of systail
Location: &tail.SeekInfo{0, os.SEEK_END},
ReOpen: true,
Poll: false})
if err != nil {
return nil, err
}
go func(name string, tail *tail.Tail) {
pub := logyard.Broker.NewPublisherMust()
defer pub.Stop()
for line := range tail.Lines {
// JSON must be a valid UTF-8 string
if !utf8.ValidString(line.Text) {
line.Text = string([]rune(line.Text))
}
data, err := json.Marshal(systail.Message{
name,
common.NewMessageCommon(line.Text, line.Time, nodeid),
})
if err != nil {
tail.Killf("Failed to encode to JSON: %v", err)
break
}
pub.MustPublish("systail."+name+"."+nodeid, string(data))
}
}(name, t)
return t, nil
}
// Make relevant cloud events available in application logs. Heroku style.
func MonitorCloudEvents() {
sub := logyard.Broker.Subscribe("event.timeline")
defer sub.Stop()
pub := logyard.Broker.NewPublisherMust()
defer pub.Stop()
log.Info("Listening for app relevant cloud events...")
for msg := range sub.Ch {
var event sieve.Event
err := json.Unmarshal([]byte(msg.Value), &event)
if err != nil {
common.Fatal("%v", err) // not expected at all
}
// Re-parse the event json record into a TimelineEvent structure.
var t TimelineEvent
if data, err := json.Marshal(event.Info); err != nil {
common.Fatal("%v", err)
} else {
err = json.Unmarshal(data, &t)
if err != nil {
common.Fatal("Invalid timeline event: %v", err)
}
}
var source string
brandname := util.GetBrandName()
if t.InstanceIndex > -1 {
source = fmt.Sprintf("%v[%v.%v]", brandname, event.Process, t.InstanceIndex)
} else {
source = fmt.Sprintf("%v[%v]", brandname, event.Process)
}
PublishAppLog(pub, t, source, &event)
}
log.Warn("Finished listening for app relevant cloud events.")
err := sub.Wait()
if err != nil {
common.Fatal("%v", err)
}
}
func main() {
major, minor, patch := gozmq.Version()
log.Infof("Starting logyard_sieve (zeromq %d.%d.%d)", major, minor, patch)
LoadConfig()
parser := sieve.NewStackatoParser(getConfig().Events)
parser.DeleteSamples()
pub := logyard.Broker.NewPublisherMust()
defer pub.Stop()
sub := logyard.Broker.Subscribe("systail")
defer sub.Stop()
server.MarkRunning("logyard_sieve")
log.Info("Watching the systail stream on this node")
for message := range sub.Ch {
var record systail.Message
err := json.Unmarshal([]byte(message.Value), &record)
if err != nil {
log.Warnf("failed to parse json: %s; ignoring record: %s",
err, message.Value)
continue
}
event, err := parser.Parse(record.Name, record.Text)
if err != nil {
log.Warnf(
"failed to parse event from %s: %s -- source: %s",
record.Name, err, record.Text)
continue
}
if event != nil {
event.MessageCommon = common.NewMessageCommon(
event.Desc, time.Unix(record.UnixTime, 0), record.NodeID)
event.MustPublish(pub)
}
}
}
func (h *webSocketHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
var errString string
if _, ok := err.(websocket.HandshakeError); !ok {
errString = fmt.Sprintf("Handshake error: %v", err)
} else {
errString = fmt.Sprintf("Unknown websocket error: %v", err)
}
log.Info(errString)
http.Error(w, errString, 500)
return
}
log.Infof("wsutil.ServeWS start - %v", getWsConnId(r, ws))
defer log.Infof("wsutil.ServeWS finish - %v", getWsConnId(r, ws))
h.handler.ServeWS(w, r, &WebSocketStream{ws})
ws.Close()
}
func cleanup() {
log.Info("cleanup: closing open inotify watches")
tail.Cleanup()
}
