better logging

internal/app/engine.go

@@ -36,14 +36,14 @@ func configureEngines(node *centrifuge.Node, cfgContainer *config.Container) (en
 		default:
 			return modes, fmt.Errorf("unknown engine type: %s", cfg.Engine.Type)
 		}
-		if err != nil {
-			return modes, fmt.Errorf("error creating engine: %v", err)
-		}
 		event := log.Info().Str("engine_type", cfg.Engine.Type)
 		if modes.engineMode != "" {
 			event.Str("engine_mode", modes.engineMode)
 		}
-		event.Msg("engine is enabled")
+		event.Msg("initializing redis engine")
+		if err != nil {
+			return modes, fmt.Errorf("error creating redis engine: %v", err)
+		}
 	} else {
 		log.Info().Msgf("both broker and presence manager enabled, skip engine initialization")
 	}

internal/app/run.go

@@ -62,13 +62,22 @@ func Run(cmd *cobra.Command, configFile string) {
 		log.Info().Msgf(strings.ToLower(s), i...)
 	}))
 
-	log.Info().
+	entry := log.Info().
 		Str("version", build.Version).
 		Str("runtime", runtime.Version()).
 		Int("pid", os.Getpid()).
-		Str("broker", cfg.Broker.Type).
-		Str("presence_manager", cfg.PresenceManager.Type).
-		Int("gomaxprocs", runtime.GOMAXPROCS(0)).Msg("starting Centrifugo")
+		Int("gomaxprocs", runtime.GOMAXPROCS(0))
+
+	if cfg.Broker.Enabled {
+		entry = entry.Str("broker", cfg.Broker.Type)
+	}
+	if cfg.PresenceManager.Enabled {
+		entry = entry.Str("presence_manager", cfg.PresenceManager.Type)
+	}
+	if !cfg.Broker.Enabled || !cfg.PresenceManager.Enabled {
+		entry = entry.Str("engine", cfg.Engine.Type)
+	}
+	entry.Msg("starting Centrifugo")
 
 	err = cfg.Validate()
 	if err != nil {

internal/confighelpers/redis.go

@@ -140,14 +140,14 @@ func getRedisShardConfigs(redisConf configtypes.Redis) ([]centrifuge.RedisShardC
 func CentrifugeRedisShards(n *centrifuge.Node, redisConf configtypes.Redis) ([]*centrifuge.RedisShard, string, error) {
 	redisShardConfigs, mode, err := getRedisShardConfigs(redisConf)
 	if err != nil {
-		return nil, "", err
+		return nil, mode, err
 	}
 	redisShards := make([]*centrifuge.RedisShard, 0, len(redisShardConfigs))
 
 	for _, shardConf := range redisShardConfigs {
 		redisShard, err := centrifuge.NewRedisShard(n, shardConf)
 		if err != nil {
-			return nil, "", err
+			return nil, mode, err
 		}
 		redisShards = append(redisShards, redisShard)
 	}