func main() {
configFile := flag.String("c", "", "config file (json)")
port := flag.Int("p", 0, "port to listen on")
maxprocs := flag.Int("maxprocs", 0, "GOMAXPROCS")
debugLevel := flag.Int("d", 0, "enable debug logging")
logtostdout := flag.Bool("stdout", false, "write logging output also to stdout")
logdir := flag.String("logdir", "/var/log/carbonzipper/", "logging directory")
flag.Parse()
expvar.NewString("BuildVersion").Set(BuildVersion)
if *configFile == "" {
log.Fatal("missing config file")
}
cfgjs, err := ioutil.ReadFile(*configFile)
if err != nil {
log.Fatal("unable to load config file:", err)
}
cfgjs = stripCommentHeader(cfgjs)
if cfgjs == nil {
log.Fatal("error removing header comment from ", *configFile)
}
err = json.Unmarshal(cfgjs, &Config)
if err != nil {
log.Fatal("error parsing config file: ", err)
}
if len(Config.Backends) == 0 {
log.Fatal("no Backends loaded -- exiting")
}
// command line overrides config file
if *port != 0 {
Config.Port = *port
}
if *maxprocs != 0 {
Config.MaxProcs = *maxprocs
}
// set up our logging
mlog.SetOutput(*logdir, "carbonzipper", *logtostdout)
logger = mlog.Level(*debugLevel)
logger.Logln("starting carbonzipper", BuildVersion)
logger.Logln("setting GOMAXPROCS=", Config.MaxProcs)
runtime.GOMAXPROCS(Config.MaxProcs)
if Config.ConcurrencyLimitPerServer != 0 {
logger.Logln("Setting concurrencyLimit", Config.ConcurrencyLimitPerServer)
Limiter = newServerLimiter(Config.Backends, Config.ConcurrencyLimitPerServer)
}
// +1 to track every over the number of buckets we track
timeBuckets = make([]int64, Config.Buckets+1)
httputil.PublishTrackedConnections("httptrack")
expvar.Publish("requestBuckets", expvar.Func(renderTimeBuckets))
// export config via expvars
expvar.Publish("Config", expvar.Func(func() interface{} { return Config }))
Metrics.CacheSize = expvar.Func(func() interface{} { return Config.pathCache.ec.Size() })
expvar.Publish("cacheSize", Metrics.CacheSize)
Metrics.CacheItems = expvar.Func(func() interface{} { return Config.pathCache.ec.Items() })
expvar.Publish("cacheItems", Metrics.CacheItems)
http.HandleFunc("/metrics/find/", httputil.TrackConnections(httputil.TimeHandler(findHandler, bucketRequestTimes)))
http.HandleFunc("/render/", httputil.TrackConnections(httputil.TimeHandler(renderHandler, bucketRequestTimes)))
http.HandleFunc("/info/", httputil.TrackConnections(httputil.TimeHandler(infoHandler, bucketRequestTimes)))
http.HandleFunc("/lb_check", lbCheckHandler)
// nothing in the config? check the environment
if Config.GraphiteHost == "" {
if host := os.Getenv("GRAPHITEHOST") + ":" + os.Getenv("GRAPHITEPORT"); host != ":" {
Config.GraphiteHost = host
}
}
// only register g2g if we have a graphite host
if Config.GraphiteHost != "" {
logger.Logln("Using graphite host", Config.GraphiteHost)
// register our metrics with graphite
graphite, err := g2g.NewGraphite(Config.GraphiteHost, 60*time.Second, 10*time.Second)
if err != nil {
log.Fatal("unable to connect to to graphite: ", Config.GraphiteHost, ":", err)
}
hostname, _ := os.Hostname()
hostname = strings.Replace(hostname, ".", "_", -1)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.find_requests", hostname), Metrics.FindRequests)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.find_errors", hostname), Metrics.FindErrors)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.render_requests", hostname), Metrics.RenderRequests)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.render_errors", hostname), Metrics.RenderErrors)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.info_requests", hostname), Metrics.InfoRequests)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.info_errors", hostname), Metrics.InfoErrors)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.timeouts", hostname), Metrics.Timeouts)
for i := 0; i <= Config.Buckets; i++ {
graphite.Register(fmt.Sprintf("carbon.zipper.%s.requests_in_%dms_to_%dms", hostname, i*100, (i+1)*100), bucketEntry(i))
}
graphite.Register(fmt.Sprintf("carbon.zipper.%s.cache_size", hostname), Metrics.CacheSize)
graphite.Register(fmt.Sprintf("carbon.zipper.%s.cache_items", hostname), Metrics.CacheItems)
}
// configure the storage client
storageClient.Transport = &http.Transport{
MaxIdleConnsPerHost: Config.MaxIdleConnsPerHost,
}
go probeTlds()
// force run now
probeForce <- 1
go Config.pathCache.ec.ApproximateCleaner(10 * time.Second)
portStr := fmt.Sprintf(":%d", Config.Port)
logger.Logln("listening on", portStr)
log.Fatal(http.ListenAndServe(portStr, nil))
}
func main() {
port := flag.Int("p", 8080, "port to bind to")
verbose := flag.Bool("v", false, "enable verbose logging")
debug := flag.Bool("vv", false, "enable more verbose (debug) logging")
whisperdata := flag.String("w", config.WhisperData, "location where whisper files are stored")
maxglobs := flag.Int("maxexpand", config.MaxGlobs, "maximum expansion depth to perform on input via curly braces ({a,b,c})")
maxprocs := flag.Int("maxprocs", runtime.NumCPU()*80/100, "GOMAXPROCS")
logdir := flag.String("logdir", "/var/log/carbonserver/", "logging directory")
logtostdout := flag.Bool("stdout", false, "log also to stdout")
scanFrequency := flag.Duration("scanfreq", 0, "file index scan frequency (0 to disable file index)")
interval := flag.Duration("i", 60*time.Second, "interval to report internal statistics to graphite")
flag.Parse()
mlog.SetOutput(*logdir, "carbonserver", *logtostdout)
expvar.NewString("BuildVersion").Set(BuildVersion)
log.Println("starting carbonserver", BuildVersion)
loglevel := mlog.Normal
if *verbose {
loglevel = mlog.Debug
}
if *debug {
loglevel = mlog.Trace
}
logger = mlog.Level(loglevel)
config.WhisperData = strings.TrimRight(*whisperdata, "/")
logger.Logf("reading whisper files from: %s", config.WhisperData)
config.MaxGlobs = *maxglobs
logger.Logf("maximum brace expansion set to: %d", config.MaxGlobs)
if *scanFrequency != 0 {
logger.Logln("use file cache with scan frequency", *scanFrequency)
force := make(chan struct{})
go fileListUpdater(*whisperdata, time.Tick(*scanFrequency), force)
force <- struct{}{}
}
runtime.GOMAXPROCS(*maxprocs)
logger.Logf("set GOMAXPROCS=%d", *maxprocs)
httputil.PublishTrackedConnections("httptrack")
expvar.Publish("requestBuckets", expvar.Func(renderTimeBuckets))
// +1 to track every over the number of buckets we track
timeBuckets = make([]int64, config.Buckets+1)
http.HandleFunc("/metrics/find/", httputil.TrackConnections(httputil.TimeHandler(findHandler, bucketRequestTimes)))
http.HandleFunc("/render/", httputil.TrackConnections(httputil.TimeHandler(fetchHandler, bucketRequestTimes)))
http.HandleFunc("/info/", httputil.TrackConnections(httputil.TimeHandler(infoHandler, bucketRequestTimes)))
// nothing in the config? check the environment
if config.GraphiteHost == "" {
if host := os.Getenv("GRAPHITEHOST") + ":" + os.Getenv("GRAPHITEPORT"); host != ":" {
config.GraphiteHost = host
}
}
// only register g2g if we have a graphite host
if config.GraphiteHost != "" {
logger.Logf("Using graphite host %v", config.GraphiteHost)
// register our metrics with graphite
graphite, err := g2g.NewGraphite(config.GraphiteHost, *interval, 10*time.Second)
if err != nil {
log.Fatalf("unable to connect to to graphite: %v: %v", config.GraphiteHost, err)
}
hostname, _ := os.Hostname()
hostname = strings.Replace(hostname, ".", "_", -1)
graphite.Register(fmt.Sprintf("carbon.server.%s.render_requests",
hostname), Metrics.RenderRequests)
graphite.Register(fmt.Sprintf("carbon.server.%s.render_errors",
hostname), Metrics.RenderErrors)
graphite.Register(fmt.Sprintf("carbon.server.%s.notfound",
hostname), Metrics.NotFound)
graphite.Register(fmt.Sprintf("carbon.server.%s.find_requests",
hostname), Metrics.FindRequests)
graphite.Register(fmt.Sprintf("carbon.server.%s.find_errors",
hostname), Metrics.FindErrors)
graphite.Register(fmt.Sprintf("carbon.server.%s.find_zero",
hostname), Metrics.FindZero)
for i := 0; i <= config.Buckets; i++ {
graphite.Register(fmt.Sprintf("carbon.server.%s.requests_in_%dms_to_%dms", hostname, i*100, (i+1)*100), bucketEntry(i))
}
}
listen := fmt.Sprintf(":%d", *port)
logger.Logf("listening on %s", listen)
err := http.ListenAndServe(listen, nil)
if err != nil {
log.Fatalf("%s", err)
}
logger.Logf("stopped")
}