Add support for tcp labels in docker provider

pkg/provider/docker/config.go

@@ -33,6 +33,21 @@ func (p *Provider) buildConfiguration(ctx context.Context, containersInspected [
 			continue
 		}
 
+		if len(confFromLabel.TCP.Routers) > 0 || len(confFromLabel.TCP.Services) > 0 {
+			err := p.buildTCPServiceConfiguration(ctxContainer, container, confFromLabel.TCP)
+			if err != nil {
+				logger.Error(err)
+				continue
+			}
+			provider.BuildTCPRouterConfiguration(ctxContainer, confFromLabel.TCP)
+			if len(confFromLabel.HTTP.Routers) == 0 &&
+				len(confFromLabel.HTTP.Middlewares) == 0 &&
+				len(confFromLabel.HTTP.Services) == 0 {
+				configurations[containerName] = confFromLabel
+				continue
+			}
+		}
+
 		err = p.buildServiceConfiguration(ctxContainer, container, confFromLabel.HTTP)
 		if err != nil {
 			logger.Error(err)
@@ -57,6 +72,28 @@ func (p *Provider) buildConfiguration(ctx context.Context, containersInspected [
 	return provider.Merge(ctx, configurations)
 }
 
+func (p *Provider) buildTCPServiceConfiguration(ctx context.Context, container dockerData, configuration *config.TCPConfiguration) error {
+	serviceName := getServiceName(container)
+
+	if len(configuration.Services) == 0 {
+		configuration.Services = make(map[string]*config.TCPService)
+		lb := &config.TCPLoadBalancerService{}
+		lb.SetDefaults()
+		configuration.Services[serviceName] = &config.TCPService{
+			LoadBalancer: lb,
+		}
+	}
+
+	for _, service := range configuration.Services {
+		err := p.addServerTCP(ctx, container, service.LoadBalancer)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func (p *Provider) buildServiceConfiguration(ctx context.Context, container dockerData, configuration *config.HTTPConfiguration) error {
 	serviceName := getServiceName(container)
 
@@ -102,6 +139,36 @@ func (p *Provider) keepContainer(ctx context.Context, container dockerData) bool
 	return true
 }
 
+func (p *Provider) addServerTCP(ctx context.Context, container dockerData, loadBalancer *config.TCPLoadBalancerService) error {
+	serverPort := ""
+	if loadBalancer != nil && len(loadBalancer.Servers) > 0 {
+		serverPort = loadBalancer.Servers[0].Port
+	}
+	ip, port, err := p.getIPPort(ctx, container, serverPort)
+	if err != nil {
+		return err
+	}
+
+	if len(loadBalancer.Servers) == 0 {
+		server := config.TCPServer{}
+		server.SetDefaults()
+
+		loadBalancer.Servers = []config.TCPServer{server}
+	}
+
+	if serverPort != "" {
+		port = serverPort
+		loadBalancer.Servers[0].Port = ""
+	}
+
+	if port == "" {
+		return errors.New("port is missing")
+	}
+
+	loadBalancer.Servers[0].Address = net.JoinHostPort(ip, port)
+	return nil
+}
+
 func (p *Provider) addServer(ctx context.Context, container dockerData, loadBalancer *config.LoadBalancerService) error {
 	serverPort := getLBServerPort(loadBalancer)
 	ip, port, err := p.getIPPort(ctx, container, serverPort)