Example #1
0
File: api.go Project: ruo91/clair
// listenAndServeWithStopper wraps graceful.Server's
// ListenAndServe/ListenAndServeTLS and adds the ability to interrupt them with
// the provided utils.Stopper
func listenAndServeWithStopper(srv *graceful.Server, st *utils.Stopper, certFile, keyFile string) {
	go func() {
		<-st.Chan()
		srv.Stop(0)
	}()

	var err error
	if certFile != "" && keyFile != "" {
		log.Info("API: TLS Enabled")
		err = srv.ListenAndServeTLS(certFile, keyFile)
	} else {
		err = srv.ListenAndServe()
	}

	if opErr, ok := err.(*net.OpError); !ok || (ok && opErr.Op != "accept") {
		log.Fatal(err)
	}
}
Example #2
0
func main() {
	kingpin.Parse()
	fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
	var srv *graceful.Server
	var configurationRouter *mux.Router
	var configurationChan = make(chan *Configuration, 10)
	defer close(configurationChan)
	var providers = []Provider{}
	var format = logging.MustStringFormatter("%{color}%{time:15:04:05.000} %{shortfile:20.20s} %{level:8.8s} %{id:03x} ▶%{color:reset} %{message}")
	var sigs = make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

	// load global configuration
	gloablConfiguration := LoadFileConfig(*globalConfigFile)

	loggerMiddleware := middlewares.NewLogger(gloablConfiguration.AccessLogsFile)
	defer loggerMiddleware.Close()

	// logging
	backends := []logging.Backend{}
	level, err := logging.LogLevel(gloablConfiguration.LogLevel)
	if err != nil {
		log.Fatal("Error getting level", err)
	}

	if len(gloablConfiguration.TraefikLogsFile) > 0 {
		fi, err := os.OpenFile(gloablConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
		defer fi.Close()
		if err != nil {
			log.Fatal("Error opening file", err)
		} else {
			logBackend := logging.NewLogBackend(fi, "", 0)
			logBackendFormatter := logging.NewBackendFormatter(logBackend, logging.GlogFormatter)
			backends = append(backends, logBackendFormatter)
		}
	}
	if gloablConfiguration.TraefikLogsStdout {
		logBackend := logging.NewLogBackend(os.Stdout, "", 0)
		logBackendFormatter := logging.NewBackendFormatter(logBackend, format)
		backends = append(backends, logBackendFormatter)
	}
	logging.SetBackend(backends...)
	logging.SetLevel(level, "traefik")

	configurationRouter = LoadDefaultConfig(gloablConfiguration)

	// listen new configurations from providers
	go func() {
		for {
			configuration := <-configurationChan
			log.Info("Configuration receveived %+v", configuration)
			if configuration == nil {
				log.Info("Skipping empty configuration")
			} else if reflect.DeepEqual(currentConfiguration, configuration) {
				log.Info("Skipping same configuration")
			} else {
				newConfigurationRouter, err := LoadConfig(configuration, gloablConfiguration)
				if err == nil {
					currentConfiguration = configuration
					configurationRouter = newConfigurationRouter
					srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
					time.Sleep(3 * time.Second)
				} else {
					log.Error("Error loading new configuration, aborted ", err)
				}
			}
		}
	}()

	// configure providers
	if gloablConfiguration.Docker != nil {
		providers = append(providers, gloablConfiguration.Docker)
	}
	if gloablConfiguration.Marathon != nil {
		providers = append(providers, gloablConfiguration.Marathon)
	}
	if gloablConfiguration.File != nil {
		if len(gloablConfiguration.File.Filename) == 0 {
			// no filename, setting to global config file
			gloablConfiguration.File.Filename = *globalConfigFile
		}
		providers = append(providers, gloablConfiguration.File)
	}
	if gloablConfiguration.Web != nil {
		providers = append(providers, gloablConfiguration.Web)
	}
	if gloablConfiguration.Consul != nil {
		providers = append(providers, gloablConfiguration.Consul)
	}

	// start providers
	for _, provider := range providers {
		log.Notice("Starting provider %v %+v", reflect.TypeOf(provider), provider)
		currentProvider := provider
		go func() {
			currentProvider.Provide(configurationChan)
		}()
	}

	goAway := false
	go func() {
		sig := <-sigs
		log.Notice("I have to go... %+v", sig)
		goAway = true
		srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
	}()

	for {
		if goAway {
			break
		}

		// middlewares
		var negroni = negroni.New()
		negroni.Use(metrics)
		negroni.Use(loggerMiddleware)
		//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
		//negroni.Use(middlewares.NewRoutes(configurationRouter))
		negroni.UseHandler(configurationRouter)

		srv = &graceful.Server{
			Timeout:          time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
			NoSignalHandling: true,

			Server: &http.Server{
				Addr:    gloablConfiguration.Port,
				Handler: negroni,
			},
		}

		go func() {
			if len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0 {
				srv.ListenAndServeTLS(gloablConfiguration.CertFile, gloablConfiguration.KeyFile)
			} else {
				srv.ListenAndServe()
			}
		}()
		log.Notice("Started")
		<-srv.StopChan()
		log.Notice("Stopped")
	}
}
Example #3
0
func main() {
	kingpin.Parse()
	fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
	var srv *graceful.Server
	var configurationRouter *mux.Router
	var configurationChan = make(chan *Configuration, 10)
	defer close(configurationChan)
	var providers = []Provider{}
	var sigs = make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

	// load global configuration
	gloablConfiguration := LoadFileConfig(*globalConfigFile)

	loggerMiddleware := middlewares.NewLogger(gloablConfiguration.AccessLogsFile)
	defer loggerMiddleware.Close()

	// logging
	level, err := log.ParseLevel(strings.ToLower(gloablConfiguration.LogLevel))
	if err != nil {
		log.Fatal("Error getting level", err)
	}
	log.SetLevel(level)

	if len(gloablConfiguration.TraefikLogsFile) > 0 {
		fi, err := os.OpenFile(gloablConfiguration.TraefikLogsFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
		defer fi.Close()
		if err != nil {
			log.Fatal("Error opening file", err)
		} else {
			log.SetOutput(fi)
			log.SetFormatter(&log.TextFormatter{DisableColors: true, FullTimestamp: true, DisableSorting: true})
		}
	} else {
		log.SetFormatter(&log.TextFormatter{FullTimestamp: true, DisableSorting: true})
	}

	configurationRouter = LoadDefaultConfig(gloablConfiguration)

	// listen new configurations from providers
	go func() {
		for {
			configuration := <-configurationChan
			log.Infof("Configuration receveived %+v", configuration)
			if configuration == nil {
				log.Info("Skipping empty configuration")
			} else if reflect.DeepEqual(currentConfiguration, configuration) {
				log.Info("Skipping same configuration")
			} else {
				newConfigurationRouter, err := LoadConfig(configuration, gloablConfiguration)
				if err == nil {
					currentConfiguration = configuration
					configurationRouter = newConfigurationRouter
					srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
					time.Sleep(3 * time.Second)
				} else {
					log.Error("Error loading new configuration, aborted ", err)
				}
			}
		}
	}()

	// configure providers
	if gloablConfiguration.Docker != nil {
		providers = append(providers, gloablConfiguration.Docker)
	}
	if gloablConfiguration.Marathon != nil {
		providers = append(providers, gloablConfiguration.Marathon)
	}
	if gloablConfiguration.File != nil {
		if len(gloablConfiguration.File.Filename) == 0 {
			// no filename, setting to global config file
			gloablConfiguration.File.Filename = *globalConfigFile
		}
		providers = append(providers, gloablConfiguration.File)
	}
	if gloablConfiguration.Web != nil {
		providers = append(providers, gloablConfiguration.Web)
	}
	if gloablConfiguration.Consul != nil {
		providers = append(providers, gloablConfiguration.Consul)
	}

	// start providers
	for _, provider := range providers {
		log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
		currentProvider := provider
		go func() {
			currentProvider.Provide(configurationChan)
		}()
	}

	goAway := false
	go func() {
		sig := <-sigs
		log.Infof("I have to go... %+v", sig)
		goAway = true
		srv.Stop(time.Duration(gloablConfiguration.GraceTimeOut) * time.Second)
	}()

	for {
		if goAway {
			break
		}

		// middlewares
		var negroni = negroni.New()
		negroni.Use(metrics)
		negroni.Use(loggerMiddleware)
		//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
		//negroni.Use(middlewares.NewRoutes(configurationRouter))
		negroni.UseHandler(configurationRouter)

		srv = &graceful.Server{
			Timeout:          time.Duration(gloablConfiguration.GraceTimeOut) * time.Second,
			NoSignalHandling: true,

			Server: &http.Server{
				Addr:    gloablConfiguration.Port,
				Handler: negroni,
			},
		}

		go func() {
			if len(gloablConfiguration.CertFile) > 0 && len(gloablConfiguration.KeyFile) > 0 {
				err := srv.ListenAndServeTLS(gloablConfiguration.CertFile, gloablConfiguration.KeyFile)
				if err != nil {
					netOpError, ok := err.(*net.OpError)
					if ok && netOpError.Err.Error() != "use of closed network connection" {
						log.Fatal("Error creating server: ", err)
					}
				}
			} else {
				err := srv.ListenAndServe()
				if err != nil {
					netOpError, ok := err.(*net.OpError)
					if ok && netOpError.Err.Error() != "use of closed network connection" {
						log.Fatal("Error creating server: ", err)
					}
				}
			}
		}()
		log.Info("Started")
		<-srv.StopChan()
		log.Info("Stopped")
	}
}