package crd import ( "context" "errors" "fmt" "net" "strconv" "strings" "github.com/traefik/traefik/v2/pkg/config/dynamic" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/provider/kubernetes/crd/traefik/v1alpha1" "github.com/traefik/traefik/v2/pkg/tls" corev1 "k8s.io/api/core/v1" ) func (p *Provider) loadIngressRouteTCPConfiguration(ctx context.Context, client Client, tlsConfigs map[string]*tls.CertAndStores) *dynamic.TCPConfiguration { conf := &dynamic.TCPConfiguration{ Routers: map[string]*dynamic.TCPRouter{}, Middlewares: map[string]*dynamic.TCPMiddleware{}, Services: map[string]*dynamic.TCPService{}, } for _, ingressRouteTCP := range client.GetIngressRouteTCPs() { logger := log.FromContext(log.With(ctx, log.Str("ingress", ingressRouteTCP.Name), log.Str("namespace", ingressRouteTCP.Namespace))) if !shouldProcessIngress(p.IngressClass, ingressRouteTCP.Annotations[annotationKubernetesIngressClass]) { continue } if ingressRouteTCP.Spec.TLS != nil && !ingressRouteTCP.Spec.TLS.Passthrough { err := getTLSTCP(ctx, ingressRouteTCP, client, tlsConfigs) if err != nil { logger.Errorf("Error configuring TLS: %v", err) } } ingressName := ingressRouteTCP.Name if len(ingressName) == 0 { ingressName = ingressRouteTCP.GenerateName } for _, route := range ingressRouteTCP.Spec.Routes { if len(route.Match) == 0 { logger.Errorf("Empty match rule") continue } key, err := makeServiceKey(route.Match, ingressName) if err != nil { logger.Error(err) continue } mds, err := p.makeMiddlewareTCPKeys(ctx, ingressRouteTCP.Namespace, route.Middlewares) if err != nil { logger.Errorf("Failed to create middleware keys: %v", err) continue } serviceName := makeID(ingressRouteTCP.Namespace, key) for _, service := range route.Services { balancerServerTCP, err := p.createLoadBalancerServerTCP(client, ingressRouteTCP.Namespace, service) if err != nil { logger. WithField("serviceName", service.Name). WithField("servicePort", service.Port). Errorf("Cannot create service: %v", err) continue } // If there is only one service defined, we skip the creation of the load balancer of services, // i.e. the service on top is directly a load balancer of servers. if len(route.Services) == 1 { conf.Services[serviceName] = balancerServerTCP break } serviceKey := fmt.Sprintf("%s-%s-%s", serviceName, service.Name, &service.Port) conf.Services[serviceKey] = balancerServerTCP srv := dynamic.TCPWRRService{Name: serviceKey} srv.SetDefaults() if service.Weight != nil { srv.Weight = service.Weight } if conf.Services[serviceName] == nil { conf.Services[serviceName] = &dynamic.TCPService{Weighted: &dynamic.TCPWeightedRoundRobin{}} } conf.Services[serviceName].Weighted.Services = append(conf.Services[serviceName].Weighted.Services, srv) } conf.Routers[serviceName] = &dynamic.TCPRouter{ EntryPoints: ingressRouteTCP.Spec.EntryPoints, Middlewares: mds, Rule: route.Match, Service: serviceName, } if ingressRouteTCP.Spec.TLS != nil { conf.Routers[serviceName].TLS = &dynamic.RouterTCPTLSConfig{ Passthrough: ingressRouteTCP.Spec.TLS.Passthrough, CertResolver: ingressRouteTCP.Spec.TLS.CertResolver, Domains: ingressRouteTCP.Spec.TLS.Domains, } if ingressRouteTCP.Spec.TLS.Options == nil || len(ingressRouteTCP.Spec.TLS.Options.Name) == 0 { continue } tlsOptionsName := ingressRouteTCP.Spec.TLS.Options.Name // Is a Kubernetes CRD reference (i.e. not a cross-provider reference) ns := ingressRouteTCP.Spec.TLS.Options.Namespace if !strings.Contains(tlsOptionsName, "@") { if len(ns) == 0 { ns = ingressRouteTCP.Namespace } tlsOptionsName = makeID(ns, tlsOptionsName) } else if len(ns) > 0 { logger. WithField("TLSoptions", ingressRouteTCP.Spec.TLS.Options.Name). Warnf("namespace %q is ignored in cross-provider context", ns) } conf.Routers[serviceName].TLS.Options = tlsOptionsName } } } return conf } func (p *Provider) makeMiddlewareTCPKeys(ctx context.Context, ingRouteTCPNamespace string, middlewares []v1alpha1.ObjectReference) ([]string, error) { var mds []string for _, mi := range middlewares { if strings.Contains(mi.Name, providerNamespaceSeparator) { if len(mi.Namespace) > 0 { log.FromContext(ctx). WithField(log.MiddlewareName, mi.Name). Warnf("namespace %q is ignored in cross-provider context", mi.Namespace) } mds = append(mds, mi.Name) continue } ns := ingRouteTCPNamespace if len(mi.Namespace) > 0 { if !isNamespaceAllowed(p.AllowCrossNamespace, ingRouteTCPNamespace, mi.Namespace) { return nil, fmt.Errorf("middleware %s/%s is not in the IngressRouteTCP namespace %s", mi.Namespace, mi.Name, ingRouteTCPNamespace) } ns = mi.Namespace } mds = append(mds, makeID(ns, mi.Name)) } return mds, nil } func (p *Provider) createLoadBalancerServerTCP(client Client, parentNamespace string, service v1alpha1.ServiceTCP) (*dynamic.TCPService, error) { ns := parentNamespace if len(service.Namespace) > 0 { if !isNamespaceAllowed(p.AllowCrossNamespace, parentNamespace, service.Namespace) { return nil, fmt.Errorf("tcp service %s/%s is not in the parent resource namespace %s", service.Namespace, service.Name, parentNamespace) } ns = service.Namespace } servers, err := p.loadTCPServers(client, ns, service) if err != nil { return nil, err } tcpService := &dynamic.TCPService{ LoadBalancer: &dynamic.TCPServersLoadBalancer{ Servers: servers, }, } if service.ProxyProtocol != nil { tcpService.LoadBalancer.ProxyProtocol = &dynamic.ProxyProtocol{} tcpService.LoadBalancer.ProxyProtocol.SetDefaults() if service.ProxyProtocol.Version != 0 { tcpService.LoadBalancer.ProxyProtocol.Version = service.ProxyProtocol.Version } } if service.TerminationDelay != nil { tcpService.LoadBalancer.TerminationDelay = service.TerminationDelay } return tcpService, nil } func (p *Provider) loadTCPServers(client Client, namespace string, svc v1alpha1.ServiceTCP) ([]dynamic.TCPServer, error) { service, exists, err := client.GetService(namespace, svc.Name) if err != nil { return nil, err } if !exists { return nil, errors.New("service not found") } if service.Spec.Type == corev1.ServiceTypeExternalName && !p.AllowExternalNameServices { return nil, fmt.Errorf("externalName services not allowed: %s/%s", namespace, svc.Name) } svcPort, err := getServicePort(service, svc.Port) if err != nil { return nil, err } var servers []dynamic.TCPServer if service.Spec.Type == corev1.ServiceTypeExternalName { servers = append(servers, dynamic.TCPServer{ Address: net.JoinHostPort(service.Spec.ExternalName, strconv.Itoa(int(svcPort.Port))), }) } else { endpoints, endpointsExists, endpointsErr := client.GetEndpoints(namespace, svc.Name) if endpointsErr != nil { return nil, endpointsErr } if !endpointsExists { return nil, errors.New("endpoints not found") } if len(endpoints.Subsets) == 0 { return nil, errors.New("subset not found") } var port int32 for _, subset := range endpoints.Subsets { for _, p := range subset.Ports { if svcPort.Name == p.Name { port = p.Port break } } if port == 0 { return nil, errors.New("cannot define a port") } for _, addr := range subset.Addresses { servers = append(servers, dynamic.TCPServer{ Address: net.JoinHostPort(addr.IP, strconv.Itoa(int(port))), }) } } } return servers, nil } func getTLSTCP(ctx context.Context, ingressRoute *v1alpha1.IngressRouteTCP, k8sClient Client, tlsConfigs map[string]*tls.CertAndStores) error { if ingressRoute.Spec.TLS == nil { return nil } if ingressRoute.Spec.TLS.SecretName == "" { log.FromContext(ctx).Debugf("No secret name provided") return nil } configKey := ingressRoute.Namespace + "/" + ingressRoute.Spec.TLS.SecretName if _, tlsExists := tlsConfigs[configKey]; !tlsExists { tlsConf, err := getTLS(k8sClient, ingressRoute.Spec.TLS.SecretName, ingressRoute.Namespace) if err != nil { return err } tlsConfigs[configKey] = tlsConf } return nil }