kafkaAcquisition: add more debug (#2609)

* kafkaAcquisition: add more debug

pkg/acquisition/modules/kafka/kafka.go

@@ -79,12 +79,16 @@ func (k *KafkaSource) UnmarshalConfig(yamlConfig []byte) error {
 		k.Config.Mode = configuration.TAIL_MODE
 	}
 
+	k.logger.Debugf("successfully unmarshaled kafka configuration : %+v", k.Config)
+
 	return err
 }
 
 func (k *KafkaSource) Configure(yamlConfig []byte, logger *log.Entry) error {
 	k.logger = logger
 
+	k.logger.Debugf("start configuring %s source", dataSourceName)
+
 	err := k.UnmarshalConfig(yamlConfig)
 	if err != nil {
 		return err
@@ -95,7 +99,7 @@ func (k *KafkaSource) Configure(yamlConfig []byte, logger *log.Entry) error {
 		return fmt.Errorf("cannot create %s dialer: %w", dataSourceName, err)
 	}
 
-	k.Reader, err = k.Config.NewReader(dialer)
+	k.Reader, err = k.Config.NewReader(dialer, k.logger)
 	if err != nil {
 		return fmt.Errorf("cannote create %s reader: %w", dataSourceName, err)
 	}
@@ -104,6 +108,8 @@ func (k *KafkaSource) Configure(yamlConfig []byte, logger *log.Entry) error {
 		return fmt.Errorf("cannot create %s reader", dataSourceName)
 	}
 
+	k.logger.Debugf("successfully configured %s source", dataSourceName)
+
 	return nil
 }
 
@@ -143,6 +149,7 @@ func (k *KafkaSource) ReadMessage(out chan types.Event) error {
 	// Start processing from latest Offset
 	k.Reader.SetOffsetAt(context.Background(), time.Now())
 	for {
+		k.logger.Tracef("reading message from topic '%s'", k.Config.Topic)
 		m, err := k.Reader.ReadMessage(context.Background())
 		if err != nil {
 			if err == io.EOF {
@@ -160,6 +167,7 @@ func (k *KafkaSource) ReadMessage(out chan types.Event) error {
 			Process: true,
 			Module:  k.GetName(),
 		}
+		k.logger.Tracef("line with message read from topic '%s': %+v", k.Config.Topic, l)
 		linesRead.With(prometheus.Labels{"topic": k.Config.Topic}).Inc()
 		var evt types.Event
 
@@ -173,6 +181,7 @@ func (k *KafkaSource) ReadMessage(out chan types.Event) error {
 }
 
 func (k *KafkaSource) RunReader(out chan types.Event, t *tomb.Tomb) error {
+	k.logger.Debugf("starting %s datasource reader goroutine with configuration %+v", dataSourceName, k.Config)
 	t.Go(func() error {
 		return k.ReadMessage(out)
 	})
@@ -190,7 +199,7 @@ func (k *KafkaSource) RunReader(out chan types.Event, t *tomb.Tomb) error {
 }
 
 func (k *KafkaSource) StreamingAcquisition(out chan types.Event, t *tomb.Tomb) error {
-	k.logger.Infof("start reader on topic '%s'", k.Config.Topic)
+	k.logger.Infof("start reader on brokers '%+v' with topic '%s'", k.Config.Brokers, k.Config.Topic)
 
 	t.Go(func() error {
 		defer trace.CatchPanic("crowdsec/acquis/kafka/live")
@@ -254,11 +263,13 @@ func (kc *KafkaConfiguration) NewDialer() (*kafka.Dialer, error) {
 	return dialer, nil
 }
 
-func (kc *KafkaConfiguration) NewReader(dialer *kafka.Dialer) (*kafka.Reader, error) {
+func (kc *KafkaConfiguration) NewReader(dialer *kafka.Dialer, logger *log.Entry) (*kafka.Reader, error) {
 	rConf := kafka.ReaderConfig{
-		Brokers: kc.Brokers,
-		Topic:   kc.Topic,
-		Dialer:  dialer,
+		Brokers:     kc.Brokers,
+		Topic:       kc.Topic,
+		Dialer:      dialer,
+		Logger:      kafka.LoggerFunc(logger.Debugf),
+		ErrorLogger: kafka.LoggerFunc(logger.Errorf),
 	}
 	if kc.GroupID != "" {
 		rConf.GroupID = kc.GroupID