Beispiel #1
0
func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	kingpin.Version(Version + " built on the " + BuildDate)
	kingpin.Parse()
	fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
	var srv *manners.GracefulServer
	var configurationRouter *mux.Router
	var configurationChan = make(chan types.ConfigMessage, 10)
	defer close(configurationChan)
	var configurationChanValidated = make(chan types.ConfigMessage, 10)
	defer close(configurationChanValidated)
	var sigs = make(chan os.Signal, 1)
	defer close(sigs)
	var stopChan = make(chan bool)
	defer close(stopChan)
	var providers = []provider.Provider{}
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
	var serverLock sync.Mutex

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

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

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

	if len(globalConfiguration.TraefikLogsFile) > 0 {
		fi, err := os.OpenFile(globalConfiguration.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})
	}
	log.Debugf("Global configuration loaded %+v", globalConfiguration)
	configurationRouter = LoadDefaultConfig(globalConfiguration)

	// listen new configurations from providers
	go func() {
		lastReceivedConfiguration := time.Unix(0, 0)
		lastConfigs := make(map[string]*types.ConfigMessage)
		for {
			configMsg := <-configurationChan
			log.Infof("Configuration receveived from provider %s: %#v", configMsg.ProviderName, configMsg.Configuration)
			lastConfigs[configMsg.ProviderName] = &configMsg
			if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
				log.Infof("Last %s config received more than %s, OK", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
				// last config received more than n s ago
				configurationChanValidated <- configMsg
			} else {
				log.Infof("Last %s config received less than %s, waiting...", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
				go func() {
					<-time.After(globalConfiguration.ProvidersThrottleDuration)
					if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
						log.Infof("Waited for %s config, OK", configMsg.ProviderName)
						configurationChanValidated <- *lastConfigs[configMsg.ProviderName]
					}
				}()
			}
			lastReceivedConfiguration = time.Now()
		}
	}()
	go func() {
		for {
			configMsg := <-configurationChanValidated
			if configMsg.Configuration == nil {
				log.Info("Skipping empty Configuration")
			} else if reflect.DeepEqual(currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
				log.Info("Skipping same configuration")
			} else {
				// Copy configurations to new map so we don't change current if LoadConfig fails
				newConfigurations := make(configs)
				for k, v := range currentConfigurations {
					newConfigurations[k] = v
				}
				newConfigurations[configMsg.ProviderName] = configMsg.Configuration

				newConfigurationRouter, err := LoadConfig(newConfigurations, globalConfiguration)
				if err == nil {
					serverLock.Lock()
					currentConfigurations = newConfigurations
					configurationRouter = newConfigurationRouter
					oldServer := srv
					newsrv, err := prepareServer(configurationRouter, globalConfiguration, oldServer, loggerMiddleware, metrics)
					if err != nil {
						log.Fatal("Error preparing server: ", err)
					}
					go startServer(newsrv, globalConfiguration)
					srv = newsrv
					time.Sleep(1 * time.Second)
					if oldServer != nil {
						log.Info("Stopping old server")
						oldServer.Close()
					}
					serverLock.Unlock()
				} else {
					log.Error("Error loading new configuration, aborted ", err)
				}
			}
		}
	}()

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

	// start providers
	for _, provider := range providers {
		log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
		currentProvider := provider
		go func() {
			err := currentProvider.Provide(configurationChan)
			if err != nil {
				log.Errorf("Error starting provider %s", err)
			}
		}()
	}

	go func() {
		sig := <-sigs
		log.Infof("I have to go... %+v", sig)
		log.Info("Stopping server")
		srv.Close()
		stopChan <- true
	}()

	//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
	//negroni.Use(middlewares.NewRoutes(configurationRouter))

	var er error
	serverLock.Lock()
	srv, er = prepareServer(configurationRouter, globalConfiguration, nil, loggerMiddleware, metrics)
	if er != nil {
		log.Fatal("Error preparing server: ", er)
	}
	go startServer(srv, globalConfiguration)
	//TODO change that!
	time.Sleep(100 * time.Millisecond)
	serverLock.Unlock()

	<-stopChan
	log.Info("Shutting down")
}
Beispiel #2
0
func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	kingpin.Parse()
	fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
	var srv *manners.GracefulServer
	var configurationRouter *mux.Router
	var configurationChan = make(chan configMessage, 10)
	defer close(configurationChan)
	var sigs = make(chan os.Signal, 1)
	defer close(sigs)
	var stopChan = make(chan bool)
	defer close(stopChan)
	var providers = []Provider{}
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

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

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

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

	if len(globalConfiguration.TraefikLogsFile) > 0 {
		fi, err := os.OpenFile(globalConfiguration.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(globalConfiguration)

	// listen new configurations from providers
	go func() {

		for {
			configMsg := <-configurationChan
			log.Infof("Configuration receveived from provider %v: %+v", configMsg.providerName, configMsg.configuration)
			if configMsg.configuration == nil {
				log.Info("Skipping empty configuration")
			} else if reflect.DeepEqual(currentConfigurations[configMsg.providerName], configMsg.configuration) {
				log.Info("Skipping same configuration")
			} else {
				// Copy configurations to new map so we don't change current if LoadConfig fails
				newConfigurations := make(configs)
				for k, v := range currentConfigurations {
					newConfigurations[k] = v
				}
				newConfigurations[configMsg.providerName] = configMsg.configuration

				newConfigurationRouter, err := LoadConfig(newConfigurations, globalConfiguration)
				if err == nil {
					currentConfigurations = newConfigurations
					configurationRouter = newConfigurationRouter
					oldServer := srv
					newsrv := prepareServer(configurationRouter, globalConfiguration, oldServer, loggerMiddleware, metrics)
					go startServer(newsrv, globalConfiguration)
					srv = newsrv
					time.Sleep(2 * time.Second)
					if oldServer != nil {
						log.Info("Stopping old server")
						oldServer.Close()
					}
				} else {
					log.Error("Error loading new configuration, aborted ", err)
				}
			}
		}
	}()

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

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

	go func() {
		sig := <-sigs
		log.Infof("I have to go... %+v", sig)
		log.Info("Stopping server")
		srv.Close()
		stopChan <- true
	}()

	//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
	//negroni.Use(middlewares.NewRoutes(configurationRouter))
	srv = prepareServer(configurationRouter, globalConfiguration, nil, loggerMiddleware, metrics)
	go startServer(srv, globalConfiguration)

	<-stopChan
	log.Info("Shutting down")
}