func doMain() error {
flag.Parse()
runtime.GOMAXPROCS(int(*maxThreads))
runtime.LockOSThread()
circularBuffer := logbuf.New(*logbufLines)
logger := log.New(circularBuffer, "", log.LstdFlags)
probers, err := setupProbers()
if err != nil {
return err
}
latencyBucketer := tricorder.NewGeometricBucketer(0.1, 100e3)
scanTimeDistribution := latencyBucketer.NewDistribution()
var scanStartTime time.Time
if err := tricorder.RegisterMetric("scan-duration",
scanTimeDistribution, units.Millisecond,
"duration of last probe"); err != nil {
return err
}
if err := tricorder.RegisterMetric("scan-start-time", &scanStartTime,
units.None, "start time of last probe"); err != nil {
return err
}
rpc.HandleHTTP()
httpd.AddHtmlWriter(circularBuffer)
if err := httpd.StartServer(*portNum); err != nil {
return err
}
for {
scanStartTime = time.Now()
for _, p := range probers {
if err := p.Probe(); err != nil {
logger.Println(err)
}
}
scanDuration := time.Since(scanStartTime)
scanTimeDistribution.Add(scanDuration)
time.Sleep(time.Second*time.Duration(*probeInterval) - scanDuration)
}
_ = logger
return nil
}
func doMain() error {
flag.Parse()
runtime.GOMAXPROCS(int(*maxThreads))
runtime.LockOSThread()
circularBuffer := logbuf.New()
logger := log.New(circularBuffer, "", log.LstdFlags)
proberList, err := setupProbers()
if err != nil {
return err
}
if err := setupHealthchecks(*configDir, proberList, logger); err != nil {
logger.Printf("Error occured while setting up Healthchecks")
return err
}
httpd.AddHtmlWriter(proberList)
httpd.AddHtmlWriter(circularBuffer)
sighupChannel := make(chan os.Signal)
signal.Notify(sighupChannel, syscall.SIGHUP)
sigtermChannel := make(chan os.Signal)
signal.Notify(sigtermChannel, syscall.SIGTERM, syscall.SIGINT)
rpc.HandleHTTP()
if err := httpd.StartServer(*portNum); err != nil {
return err
}
writePidfile()
proberList.StartProbing(*probeInterval, logger)
for {
select {
case <-sighupChannel:
err = syscall.Exec(os.Args[0], os.Args, os.Environ())
if err != nil {
logger.Printf("Unable to Exec:%s\t%s\n", os.Args[0], err)
}
case <-sigtermChannel:
gracefulCleanup()
}
}
return nil
}