Exemple #1
0
func (provider *Kv) watchKv(configurationChan chan<- types.ConfigMessage, prefix string, stop chan bool) error {
	operation := func() error {
		events, err := provider.kvclient.WatchTree(provider.Prefix, make(chan struct{}))
		if err != nil {
			return fmt.Errorf("Failed to KV WatchTree: %v", err)
		}
		for {
			select {
			case <-stop:
				return nil
			case _, ok := <-events:
				if !ok {
					return errors.New("watchtree channel closed")
				}
				configuration := provider.loadConfig()
				if configuration != nil {
					configurationChan <- types.ConfigMessage{
						ProviderName:  string(provider.storeType),
						Configuration: configuration,
					}
				}
			}
		}
	}

	notify := func(err error, time time.Duration) {
		log.Errorf("KV connection error: %+v, retrying in %s", err, time)
	}
	err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
	if err != nil {
		return fmt.Errorf("Cannot connect to KV server: %v", err)
	}
	return nil
}
Exemple #2
0
func (provider *Kv) provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	provider.Constraints = append(provider.Constraints, constraints...)
	operation := func() error {
		if _, err := provider.kvclient.Exists("qmslkjdfmqlskdjfmqlksjazçueznbvbwzlkajzebvkwjdcqmlsfj"); err != nil {
			return fmt.Errorf("Failed to test KV store connection: %v", err)
		}
		if provider.Watch {
			pool.Go(func(stop chan bool) {
				err := provider.watchKv(configurationChan, provider.Prefix, stop)
				if err != nil {
					log.Errorf("Cannot watch KV store: %v", err)
				}
			})
		}
		configuration := provider.loadConfig()
		configurationChan <- types.ConfigMessage{
			ProviderName:  string(provider.storeType),
			Configuration: configuration,
		}
		return nil
	}
	notify := func(err error, time time.Duration) {
		log.Errorf("KV connection error: %+v, retrying in %s", err, time)
	}
	err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
	if err != nil {
		return fmt.Errorf("Cannot connect to KV server: %v", err)
	}
	return nil
}
Exemple #3
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *ConsulCatalog) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	config := api.DefaultConfig()
	config.Address = provider.Endpoint
	client, err := api.NewClient(config)
	if err != nil {
		return err
	}
	provider.client = client
	provider.Constraints = append(provider.Constraints, constraints...)

	pool.Go(func(stop chan bool) {
		notify := func(err error, time time.Duration) {
			log.Errorf("Consul connection error %+v, retrying in %s", err, time)
		}
		operation := func() error {
			return provider.watch(configurationChan, stop)
		}
		err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
		if err != nil {
			log.Errorf("Cannot connect to consul server %+v", err)
		}
	})

	return err
}
Exemple #4
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *Kubernetes) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	k8sClient, err := provider.newK8sClient()
	if err != nil {
		return err
	}
	provider.Constraints = append(provider.Constraints, constraints...)

	pool.Go(func(stop chan bool) {
		operation := func() error {
			for {
				stopWatch := make(chan struct{}, 1)
				defer close(stopWatch)
				log.Debugf("Using label selector: '%s'", provider.LabelSelector)
				eventsChan, err := k8sClient.WatchAll(provider.LabelSelector, stopWatch)
				if err != nil {
					log.Errorf("Error watching kubernetes events: %v", err)
					timer := time.NewTimer(1 * time.Second)
					select {
					case <-timer.C:
						return err
					case <-stop:
						return nil
					}
				}
				for {
					select {
					case <-stop:
						return nil
					case event := <-eventsChan:
						log.Debugf("Received event from kubernetes %+v", event)
						templateObjects, err := provider.loadIngresses(k8sClient)
						if err != nil {
							return err
						}
						if reflect.DeepEqual(provider.lastConfiguration.Get(), templateObjects) {
							log.Debugf("Skipping event from kubernetes %+v", event)
						} else {
							provider.lastConfiguration.Set(templateObjects)
							configurationChan <- types.ConfigMessage{
								ProviderName:  "kubernetes",
								Configuration: provider.loadConfig(*templateObjects),
							}
						}
					}
				}
			}
		}

		notify := func(err error, time time.Duration) {
			log.Errorf("Kubernetes connection error %+v, retrying in %s", err, time)
		}
		err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
		if err != nil {
			log.Errorf("Cannot connect to Kubernetes server %+v", err)
		}
	})

	return nil
}
Exemple #5
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *Eureka) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, _ types.Constraints) error {

	operation := func() error {
		configuration, err := provider.buildConfiguration()
		if err != nil {
			log.Errorf("Failed to build configuration for Eureka, error: %s", err)
			return err
		}

		configurationChan <- types.ConfigMessage{
			ProviderName:  "eureka",
			Configuration: configuration,
		}

		var delay time.Duration
		if len(provider.Delay) > 0 {
			var err error
			delay, err = time.ParseDuration(provider.Delay)
			if err != nil {
				log.Errorf("Failed to parse delay for Eureka, error: %s", err)
				return err
			}
		} else {
			delay = time.Second * 30
		}

		ticker := time.NewTicker(delay)
		go func() {
			for t := range ticker.C {

				log.Debug("Refreshing Eureka " + t.String())

				configuration, err := provider.buildConfiguration()
				if err != nil {
					log.Errorf("Failed to refresh Eureka configuration, error: %s", err)
					return
				}

				configurationChan <- types.ConfigMessage{
					ProviderName:  "eureka",
					Configuration: configuration,
				}
			}
		}()
		return nil
	}

	notify := func(err error, time time.Duration) {
		log.Errorf("Eureka connection error %+v, retrying in %s", err, time)
	}
	err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
	if err != nil {
		log.Errorf("Cannot connect to Eureka server %+v", err)
		return err
	}
	return nil
}
Exemple #6
0
func (d *Datastore) watchChanges() error {
	stopCh := make(chan struct{})
	kvCh, err := d.kv.Watch(d.lockKey, stopCh)
	if err != nil {
		return err
	}
	go func() {
		ctx, cancel := context.WithCancel(d.ctx)
		operation := func() error {
			for {
				select {
				case <-ctx.Done():
					stopCh <- struct{}{}
					return nil
				case _, ok := <-kvCh:
					if !ok {
						cancel()
						return err
					}
					err = d.reload()
					if err != nil {
						return err
					}
					// log.Debugf("Datastore object change received: %+v", d.meta)
					if d.listener != nil {
						err := d.listener(d.meta.object)
						if err != nil {
							log.Errorf("Error calling datastore listener: %s", err)
						}
					}
				}
			}
		}
		notify := func(err error, time time.Duration) {
			log.Errorf("Error in watch datastore: %+v, retrying in %s", err, time)
		}
		err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
		if err != nil {
			log.Errorf("Error in watch datastore: %v", err)
		}
	}()
	return nil
}
Exemple #7
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *Mesos) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	operation := func() error {

		// initialize logging
		logging.SetupLogs()

		log.Debugf("%s", provider.IPSources)

		var zk string
		var masters []string

		if strings.HasPrefix(provider.Endpoint, "zk://") {
			zk = provider.Endpoint
		} else {
			masters = strings.Split(provider.Endpoint, ",")
		}

		errch := make(chan error)

		changed := detectMasters(zk, masters)
		reload := time.NewTicker(time.Second * time.Duration(provider.RefreshSeconds))
		zkTimeout := time.Second * time.Duration(provider.ZkDetectionTimeout)
		timeout := time.AfterFunc(zkTimeout, func() {
			if zkTimeout > 0 {
				errch <- fmt.Errorf("master detection timed out after %s", zkTimeout)
			}
		})

		defer reload.Stop()
		defer util.HandleCrash()

		if !provider.Watch {
			reload.Stop()
			timeout.Stop()
		}

		for {
			select {
			case <-reload.C:
				configuration := provider.loadMesosConfig()
				if configuration != nil {
					configurationChan <- types.ConfigMessage{
						ProviderName:  "mesos",
						Configuration: configuration,
					}
				}
			case masters := <-changed:
				if len(masters) == 0 || masters[0] == "" {
					// no leader
					timeout.Reset(zkTimeout)
				} else {
					timeout.Stop()
				}
				log.Debugf("new masters detected: %v", masters)
				provider.Masters = masters
				configuration := provider.loadMesosConfig()
				if configuration != nil {
					configurationChan <- types.ConfigMessage{
						ProviderName:  "mesos",
						Configuration: configuration,
					}
				}
			case err := <-errch:
				log.Errorf("%s", err)
			}
		}
	}

	notify := func(err error, time time.Duration) {
		log.Errorf("mesos connection error %+v, retrying in %s", err, time)
	}
	err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
	if err != nil {
		log.Errorf("Cannot connect to mesos server %+v", err)
	}
	return nil
}
Exemple #8
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *Marathon) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	provider.Constraints = append(provider.Constraints, constraints...)
	operation := func() error {
		config := marathon.NewDefaultConfig()
		config.URL = provider.Endpoint
		config.EventsTransport = marathon.EventsTransportSSE
		if provider.Basic != nil {
			config.HTTPBasicAuthUser = provider.Basic.HTTPBasicAuthUser
			config.HTTPBasicPassword = provider.Basic.HTTPBasicPassword
		}
		if len(provider.DCOSToken) > 0 {
			config.DCOSToken = provider.DCOSToken
		}
		TLSConfig, err := provider.TLS.CreateTLSConfig()
		if err != nil {
			return err
		}
		config.HTTPClient = &http.Client{
			Transport: &http.Transport{
				DialContext: (&net.Dialer{
					KeepAlive: provider.KeepAlive * time.Second,
					Timeout:   time.Second * provider.DialerTimeout,
				}).DialContext,
				TLSClientConfig: TLSConfig,
			},
		}
		client, err := marathon.NewClient(config)
		if err != nil {
			log.Errorf("Failed to create a client for marathon, error: %s", err)
			return err
		}
		provider.marathonClient = client
		update := make(marathon.EventsChannel, 5)
		if provider.Watch {
			if err := client.AddEventsListener(update, marathon.EventIDApplications); err != nil {
				log.Errorf("Failed to register for events, %s", err)
				return err
			}
			pool.Go(func(stop chan bool) {
				defer close(update)
				for {
					select {
					case <-stop:
						return
					case event := <-update:
						log.Debug("Marathon event receveived", event)
						configuration := provider.loadMarathonConfig()
						if configuration != nil {
							configurationChan <- types.ConfigMessage{
								ProviderName:  "marathon",
								Configuration: configuration,
							}
						}
					}
				}
			})
		}
		configuration := provider.loadMarathonConfig()
		configurationChan <- types.ConfigMessage{
			ProviderName:  "marathon",
			Configuration: configuration,
		}
		return nil
	}

	notify := func(err error, time time.Duration) {
		log.Errorf("Marathon connection error %+v, retrying in %s", err, time)
	}
	err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
	if err != nil {
		log.Errorf("Cannot connect to Marathon server %+v", err)
	}
	return nil
}
Exemple #9
0
// Provide allows the provider to provide configurations to traefik
// using the given configuration channel.
func (provider *Docker) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
	provider.Constraints = append(provider.Constraints, constraints...)
	// TODO register this routine in pool, and watch for stop channel
	safe.Go(func() {
		operation := func() error {
			var err error

			dockerClient, err := provider.createClient()
			if err != nil {
				log.Errorf("Failed to create a client for docker, error: %s", err)
				return err
			}

			ctx := context.Background()
			version, err := dockerClient.ServerVersion(ctx)
			log.Debugf("Docker connection established with docker %s (API %s)", version.Version, version.APIVersion)
			var dockerDataList []dockerData
			if provider.SwarmMode {
				dockerDataList, err = listServices(ctx, dockerClient)
				if err != nil {
					log.Errorf("Failed to list services for docker swarm mode, error %s", err)
					return err
				}
			} else {
				dockerDataList, err = listContainers(ctx, dockerClient)
				if err != nil {
					log.Errorf("Failed to list containers for docker, error %s", err)
					return err
				}
			}

			configuration := provider.loadDockerConfig(dockerDataList)
			configurationChan <- types.ConfigMessage{
				ProviderName:  "docker",
				Configuration: configuration,
			}
			if provider.Watch {
				ctx, cancel := context.WithCancel(ctx)
				if provider.SwarmMode {
					// TODO: This need to be change. Linked to Swarm events docker/docker#23827
					ticker := time.NewTicker(SwarmDefaultWatchTime)
					pool.Go(func(stop chan bool) {
						for {
							select {
							case <-ticker.C:
								services, err := listServices(ctx, dockerClient)
								if err != nil {
									log.Errorf("Failed to list services for docker, error %s", err)
									return
								}
								configuration := provider.loadDockerConfig(services)
								if configuration != nil {
									configurationChan <- types.ConfigMessage{
										ProviderName:  "docker",
										Configuration: configuration,
									}
								}

							case <-stop:
								ticker.Stop()
								cancel()
								return
							}
						}
					})

				} else {
					pool.Go(func(stop chan bool) {
						for {
							select {
							case <-stop:
								cancel()
								return
							}
						}
					})
					f := filters.NewArgs()
					f.Add("type", "container")
					options := dockertypes.EventsOptions{
						Filters: f,
					}
					eventHandler := events.NewHandler(events.ByAction)
					startStopHandle := func(m eventtypes.Message) {
						log.Debugf("Docker event received %+v", m)
						containers, err := listContainers(ctx, dockerClient)
						if err != nil {
							log.Errorf("Failed to list containers for docker, error %s", err)
							// Call cancel to get out of the monitor
							cancel()
							return
						}
						configuration := provider.loadDockerConfig(containers)
						if configuration != nil {
							configurationChan <- types.ConfigMessage{
								ProviderName:  "docker",
								Configuration: configuration,
							}
						}
					}
					eventHandler.Handle("start", startStopHandle)
					eventHandler.Handle("die", startStopHandle)
					eventHandler.Handle("health_status: healthy", startStopHandle)
					eventHandler.Handle("health_status: unhealthy", startStopHandle)
					eventHandler.Handle("health_status: starting", startStopHandle)

					errChan := events.MonitorWithHandler(ctx, dockerClient, options, eventHandler)
					if err := <-errChan; err != nil {
						return err
					}
				}
			}
			return nil
		}
		notify := func(err error, time time.Duration) {
			log.Errorf("Docker connection error %+v, retrying in %s", err, time)
		}
		err := backoff.RetryNotify(operation, job.NewBackOff(backoff.NewExponentialBackOff()), notify)
		if err != nil {
			log.Errorf("Cannot connect to docker server %+v", err)
		}
	})

	return nil
}