Add support for tcp labels in docker provider

pkg/provider/configuration.go

@@ -36,6 +36,12 @@ func Merge(ctx context.Context, configurations map[string]*config.Configuration)
 	routersToDelete := map[string]struct{}{}
 	routers := map[string][]string{}
 
+	servicesTCPToDelete := map[string]struct{}{}
+	servicesTCP := map[string][]string{}
+
+	routersTCPToDelete := map[string]struct{}{}
+	routersTCP := map[string][]string{}
+
 	middlewaresToDelete := map[string]struct{}{}
 	middlewares := map[string][]string{}
 
@@ -61,6 +67,20 @@ func Merge(ctx context.Context, configurations map[string]*config.Configuration)
 			}
 		}
 
+		for serviceName, service := range conf.TCP.Services {
+			servicesTCP[serviceName] = append(servicesTCP[serviceName], root)
+			if !AddServiceTCP(configuration.TCP, serviceName, service) {
+				servicesTCPToDelete[serviceName] = struct{}{}
+			}
+		}
+
+		for routerName, router := range conf.TCP.Routers {
+			routersTCP[routerName] = append(routersTCP[routerName], root)
+			if !AddRouterTCP(configuration.TCP, routerName, router) {
+				routersTCPToDelete[routerName] = struct{}{}
+			}
+		}
+
 		for middlewareName, middleware := range conf.HTTP.Middlewares {
 			middlewares[middlewareName] = append(middlewares[middlewareName], root)
 			if !AddMiddleware(configuration.HTTP, middlewareName, middleware) {
@@ -81,6 +101,18 @@ func Merge(ctx context.Context, configurations map[string]*config.Configuration)
 		delete(configuration.HTTP.Routers, routerName)
 	}
 
+	for serviceName := range servicesTCPToDelete {
+		logger.WithField(log.ServiceName, serviceName).
+			Errorf("Service TCP defined multiple times with different configurations in %v", servicesTCP[serviceName])
+		delete(configuration.TCP.Services, serviceName)
+	}
+
+	for routerName := range routersTCPToDelete {
+		logger.WithField(log.RouterName, routerName).
+			Errorf("Router TCP defined multiple times with different configurations in %v", routersTCP[routerName])
+		delete(configuration.TCP.Routers, routerName)
+	}
+
 	for middlewareName := range middlewaresToDelete {
 		logger.WithField(log.MiddlewareName, middlewareName).
 			Errorf("Middleware defined multiple times with different configurations in %v", middlewares[middlewareName])
@@ -90,6 +122,31 @@ func Merge(ctx context.Context, configurations map[string]*config.Configuration)
 	return configuration
 }
 
+// AddServiceTCP Adds a service to a configurations.
+func AddServiceTCP(configuration *config.TCPConfiguration, serviceName string, service *config.TCPService) bool {
+	if _, ok := configuration.Services[serviceName]; !ok {
+		configuration.Services[serviceName] = service
+		return true
+	}
+
+	if !configuration.Services[serviceName].LoadBalancer.Mergeable(service.LoadBalancer) {
+		return false
+	}
+
+	configuration.Services[serviceName].LoadBalancer.Servers = append(configuration.Services[serviceName].LoadBalancer.Servers, service.LoadBalancer.Servers...)
+	return true
+}
+
+// AddRouterTCP Adds a router to a configurations.
+func AddRouterTCP(configuration *config.TCPConfiguration, routerName string, router *config.TCPRouter) bool {
+	if _, ok := configuration.Routers[routerName]; !ok {
+		configuration.Routers[routerName] = router
+		return true
+	}
+
+	return reflect.DeepEqual(configuration.Routers[routerName], router)
+}
+
 // AddService Adds a service to a configurations.
 func AddService(configuration *config.HTTPConfiguration, serviceName string, service *config.Service) bool {
 	if _, ok := configuration.Services[serviceName]; !ok {
@@ -137,10 +194,33 @@ func MakeDefaultRuleTemplate(defaultRule string, funcMap template.FuncMap) (*tem
 	return template.New("defaultRule").Funcs(defaultFuncMap).Parse(defaultRule)
 }
 
+// BuildTCPRouterConfiguration Builds a router configuration.
+func BuildTCPRouterConfiguration(ctx context.Context, configuration *config.TCPConfiguration) {
+	for routerName, router := range configuration.Routers {
+		loggerRouter := log.FromContext(ctx).WithField(log.RouterName, routerName)
+		if len(router.Rule) == 0 {
+			delete(configuration.Routers, routerName)
+			loggerRouter.Errorf("Empty rule")
+			continue
+		}
+
+		if len(router.Service) == 0 {
+			if len(configuration.Services) > 1 {
+				delete(configuration.Routers, routerName)
+				loggerRouter.
+					Error("Could not define the service name for the router: too many services")
+				continue
+			}
+
+			for serviceName := range configuration.Services {
+				router.Service = serviceName
+			}
+		}
+	}
+}
+
 // BuildRouterConfiguration Builds a router configuration.
 func BuildRouterConfiguration(ctx context.Context, configuration *config.HTTPConfiguration, defaultRouterName string, defaultRuleTpl *template.Template, model interface{}) {
-	logger := log.FromContext(ctx)
-
 	if len(configuration.Routers) == 0 {
 		if len(configuration.Services) > 1 {
 			log.FromContext(ctx).Info("Could not create a router for the container: too many services")
@@ -151,7 +231,7 @@ func BuildRouterConfiguration(ctx context.Context, configuration *config.HTTPCon
 	}
 
 	for routerName, router := range configuration.Routers {
-		loggerRouter := logger.WithField(log.RouterName, routerName)
+		loggerRouter := log.FromContext(ctx).WithField(log.RouterName, routerName)
 		if len(router.Rule) == 0 {
 			writer := &bytes.Buffer{}
 			if err := defaultRuleTpl.Execute(writer, model); err != nil {

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)