mirror of
https://github.com/traefik/traefik.git
synced 2025-10-30 16:01:14 +01:00
339 lines
11 KiB
Go
339 lines
11 KiB
Go
package gateway
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/rs/zerolog/log"
|
|
"github.com/traefik/traefik/v3/pkg/config/dynamic"
|
|
"github.com/traefik/traefik/v3/pkg/provider"
|
|
corev1 "k8s.io/api/core/v1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
ktypes "k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/utils/ptr"
|
|
gatev1 "sigs.k8s.io/gateway-api/apis/v1"
|
|
gatev1alpha2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
|
|
)
|
|
|
|
func (p *Provider) loadTCPRoutes(ctx context.Context, gatewayListeners []gatewayListener, conf *dynamic.Configuration) {
|
|
logger := log.Ctx(ctx)
|
|
routes, err := p.client.ListTCPRoutes()
|
|
if err != nil {
|
|
logger.Error().Err(err).Msgf("Unable to list TCPRoutes")
|
|
return
|
|
}
|
|
|
|
for _, route := range routes {
|
|
logger := log.Ctx(ctx).With().
|
|
Str("tcp_route", route.Name).
|
|
Str("namespace", route.Namespace).
|
|
Logger()
|
|
|
|
routeListeners := matchingGatewayListeners(gatewayListeners, route.Namespace, route.Spec.ParentRefs)
|
|
if len(routeListeners) == 0 {
|
|
continue
|
|
}
|
|
|
|
var parentStatuses []gatev1alpha2.RouteParentStatus
|
|
for _, parentRef := range route.Spec.ParentRefs {
|
|
parentStatus := &gatev1alpha2.RouteParentStatus{
|
|
ParentRef: parentRef,
|
|
ControllerName: controllerName,
|
|
Conditions: []metav1.Condition{
|
|
{
|
|
Type: string(gatev1.RouteConditionAccepted),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.Generation,
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonNoMatchingParent),
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, listener := range routeListeners {
|
|
accepted := matchListener(listener, parentRef)
|
|
|
|
if accepted && !allowRoute(listener, route.Namespace, kindTCPRoute) {
|
|
parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonNotAllowedByListeners))
|
|
accepted = false
|
|
}
|
|
|
|
if accepted {
|
|
listener.Status.AttachedRoutes++
|
|
// only consider the route attached if the listener is in an "attached" state.
|
|
if listener.Attached {
|
|
parentStatus.Conditions = updateRouteConditionAccepted(parentStatus.Conditions, string(gatev1.RouteReasonAccepted))
|
|
}
|
|
}
|
|
|
|
routeConf, resolveRefCondition := p.loadTCPRoute(listener, route)
|
|
if accepted && listener.Attached {
|
|
mergeTCPConfiguration(routeConf, conf)
|
|
}
|
|
parentStatus.Conditions = upsertRouteConditionResolvedRefs(parentStatus.Conditions, resolveRefCondition)
|
|
}
|
|
|
|
parentStatuses = append(parentStatuses, *parentStatus)
|
|
}
|
|
|
|
routeStatus := gatev1alpha2.TCPRouteStatus{
|
|
RouteStatus: gatev1alpha2.RouteStatus{
|
|
Parents: parentStatuses,
|
|
},
|
|
}
|
|
if err := p.client.UpdateTCPRouteStatus(ctx, ktypes.NamespacedName{Namespace: route.Namespace, Name: route.Name}, routeStatus); err != nil {
|
|
logger.Warn().
|
|
Err(err).
|
|
Msg("Unable to update TCPRoute status")
|
|
}
|
|
}
|
|
}
|
|
|
|
func (p *Provider) loadTCPRoute(listener gatewayListener, route *gatev1alpha2.TCPRoute) (*dynamic.Configuration, metav1.Condition) {
|
|
conf := &dynamic.Configuration{
|
|
TCP: &dynamic.TCPConfiguration{
|
|
Routers: make(map[string]*dynamic.TCPRouter),
|
|
Middlewares: make(map[string]*dynamic.TCPMiddleware),
|
|
Services: make(map[string]*dynamic.TCPService),
|
|
ServersTransports: make(map[string]*dynamic.TCPServersTransport),
|
|
},
|
|
}
|
|
|
|
condition := metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionTrue,
|
|
ObservedGeneration: route.Generation,
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteConditionResolvedRefs),
|
|
}
|
|
|
|
for ri, rule := range route.Spec.Rules {
|
|
if rule.BackendRefs == nil {
|
|
// Should not happen due to validation.
|
|
// https://github.com/kubernetes-sigs/gateway-api/blob/v0.4.0/apis/v1alpha2/tcproute_types.go#L76
|
|
continue
|
|
}
|
|
|
|
router := dynamic.TCPRouter{
|
|
Rule: "HostSNI(`*`)",
|
|
EntryPoints: []string{listener.EPName},
|
|
RuleSyntax: "default",
|
|
}
|
|
|
|
if listener.Protocol == gatev1.TLSProtocolType && listener.TLS != nil {
|
|
router.TLS = &dynamic.RouterTCPTLSConfig{
|
|
Passthrough: listener.TLS.Mode != nil && *listener.TLS.Mode == gatev1.TLSModePassthrough,
|
|
}
|
|
}
|
|
|
|
// Adding the gateway desc and the entryPoint desc prevents overlapping of routers build from the same routes.
|
|
routeKey := provider.Normalize(fmt.Sprintf("%s-%s-%s-gw-%s-%s-ep-%s-%d", strings.ToLower(kindTCPRoute), route.Namespace, route.Name, listener.GWNamespace, listener.GWName, listener.EPName, ri))
|
|
// Routing criteria should be introduced at some point.
|
|
routerName := makeRouterName("", routeKey)
|
|
|
|
if len(rule.BackendRefs) == 1 && isInternalService(rule.BackendRefs[0]) {
|
|
router.Service = string(rule.BackendRefs[0].Name)
|
|
conf.TCP.Routers[routerName] = &router
|
|
continue
|
|
}
|
|
|
|
var serviceCondition *metav1.Condition
|
|
router.Service, serviceCondition = p.loadTCPWRRService(conf, routerName, rule.BackendRefs, route)
|
|
if serviceCondition != nil {
|
|
condition = *serviceCondition
|
|
}
|
|
|
|
conf.TCP.Routers[routerName] = &router
|
|
}
|
|
|
|
return conf, condition
|
|
}
|
|
|
|
// loadTCPWRRService is generating a WRR service, even when there is only one target.
|
|
func (p *Provider) loadTCPWRRService(conf *dynamic.Configuration, routeKey string, backendRefs []gatev1.BackendRef, route *gatev1alpha2.TCPRoute) (string, *metav1.Condition) {
|
|
name := routeKey + "-wrr"
|
|
if _, ok := conf.TCP.Services[name]; ok {
|
|
return name, nil
|
|
}
|
|
|
|
var wrr dynamic.TCPWeightedRoundRobin
|
|
var condition *metav1.Condition
|
|
for _, backendRef := range backendRefs {
|
|
svcName, svc, errCondition := p.loadTCPService(route, backendRef)
|
|
weight := ptr.To(int(ptr.Deref(backendRef.Weight, 1)))
|
|
|
|
if errCondition != nil {
|
|
condition = errCondition
|
|
|
|
errName := routeKey + "-err-lb"
|
|
conf.TCP.Services[errName] = &dynamic.TCPService{
|
|
LoadBalancer: &dynamic.TCPServersLoadBalancer{
|
|
Servers: []dynamic.TCPServer{},
|
|
},
|
|
}
|
|
|
|
wrr.Services = append(wrr.Services, dynamic.TCPWRRService{
|
|
Name: errName,
|
|
Weight: weight,
|
|
})
|
|
continue
|
|
}
|
|
|
|
if svc != nil {
|
|
conf.TCP.Services[svcName] = svc
|
|
}
|
|
|
|
wrr.Services = append(wrr.Services, dynamic.TCPWRRService{
|
|
Name: svcName,
|
|
Weight: weight,
|
|
})
|
|
}
|
|
|
|
conf.TCP.Services[name] = &dynamic.TCPService{Weighted: &wrr}
|
|
return name, condition
|
|
}
|
|
|
|
func (p *Provider) loadTCPService(route *gatev1alpha2.TCPRoute, backendRef gatev1.BackendRef) (string, *dynamic.TCPService, *metav1.Condition) {
|
|
kind := ptr.Deref(backendRef.Kind, kindService)
|
|
|
|
group := groupCore
|
|
if backendRef.Group != nil && *backendRef.Group != "" {
|
|
group = string(*backendRef.Group)
|
|
}
|
|
|
|
namespace := route.Namespace
|
|
if backendRef.Namespace != nil && *backendRef.Namespace != "" {
|
|
namespace = string(*backendRef.Namespace)
|
|
}
|
|
|
|
serviceName := provider.Normalize(namespace + "-" + string(backendRef.Name))
|
|
|
|
if err := p.isReferenceGranted(kindTCPRoute, route.Namespace, group, string(kind), string(backendRef.Name), namespace); err != nil {
|
|
return serviceName, nil, &metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.Generation,
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonRefNotPermitted),
|
|
Message: fmt.Sprintf("Cannot load TCPRoute BackendRef %s/%s/%s/%s: %s", group, kind, namespace, backendRef.Name, err),
|
|
}
|
|
}
|
|
|
|
if group != groupCore || kind != kindService {
|
|
name, err := p.loadTCPBackendRef(backendRef)
|
|
if err != nil {
|
|
return serviceName, nil, &metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.Generation,
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonInvalidKind),
|
|
Message: fmt.Sprintf("Cannot load TCPRoute BackendRef %s/%s/%s/%s: %s", group, kind, namespace, backendRef.Name, err),
|
|
}
|
|
}
|
|
|
|
return name, nil, nil
|
|
}
|
|
|
|
port := ptr.Deref(backendRef.Port, gatev1.PortNumber(0))
|
|
if port == 0 {
|
|
return serviceName, nil, &metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.Generation,
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonUnsupportedProtocol),
|
|
Message: fmt.Sprintf("Cannot load TCPRoute BackendRef %s/%s/%s/%s port is required", group, kind, namespace, backendRef.Name),
|
|
}
|
|
}
|
|
|
|
portStr := strconv.FormatInt(int64(port), 10)
|
|
serviceName = provider.Normalize(serviceName + "-" + portStr)
|
|
|
|
lb, errCondition := p.loadTCPServers(namespace, route, backendRef)
|
|
if errCondition != nil {
|
|
return serviceName, nil, errCondition
|
|
}
|
|
|
|
return serviceName, &dynamic.TCPService{LoadBalancer: lb}, nil
|
|
}
|
|
|
|
func (p *Provider) loadTCPServers(namespace string, route *gatev1alpha2.TCPRoute, backendRef gatev1.BackendRef) (*dynamic.TCPServersLoadBalancer, *metav1.Condition) {
|
|
backendAddresses, svcPort, err := p.getBackendAddresses(namespace, backendRef)
|
|
if err != nil {
|
|
return nil, &metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.GetGeneration(),
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonBackendNotFound),
|
|
Message: fmt.Sprintf("Cannot load TCPRoute BackendRef %s/%s: %s", namespace, backendRef.Name, err),
|
|
}
|
|
}
|
|
|
|
if svcPort.Protocol != corev1.ProtocolTCP {
|
|
return nil, &metav1.Condition{
|
|
Type: string(gatev1.RouteConditionResolvedRefs),
|
|
Status: metav1.ConditionFalse,
|
|
ObservedGeneration: route.GetGeneration(),
|
|
LastTransitionTime: metav1.Now(),
|
|
Reason: string(gatev1.RouteReasonUnsupportedProtocol),
|
|
Message: fmt.Sprintf("Cannot load TCPRoute BackendRef %s/%s: only TCP protocol is supported", namespace, backendRef.Name),
|
|
}
|
|
}
|
|
|
|
lb := &dynamic.TCPServersLoadBalancer{}
|
|
|
|
for _, ba := range backendAddresses {
|
|
lb.Servers = append(lb.Servers, dynamic.TCPServer{
|
|
Address: net.JoinHostPort(ba.IP, strconv.Itoa(int(ba.Port))),
|
|
})
|
|
}
|
|
return lb, nil
|
|
}
|
|
|
|
func (p *Provider) loadTCPBackendRef(backendRef gatev1.BackendRef) (string, error) {
|
|
// Support for cross-provider references (e.g: api@internal).
|
|
// This provides the same behavior as for IngressRoutes.
|
|
if *backendRef.Kind == "TraefikService" && strings.Contains(string(backendRef.Name), "@") {
|
|
return string(backendRef.Name), nil
|
|
}
|
|
|
|
return "", fmt.Errorf("unsupported BackendRef %s/%s/%s", *backendRef.Group, *backendRef.Kind, backendRef.Name)
|
|
}
|
|
|
|
func mergeTCPConfiguration(from, to *dynamic.Configuration) {
|
|
if from == nil || from.TCP == nil || to == nil {
|
|
return
|
|
}
|
|
|
|
if to.TCP == nil {
|
|
to.TCP = from.TCP
|
|
return
|
|
}
|
|
|
|
if to.TCP.Routers == nil {
|
|
to.TCP.Routers = map[string]*dynamic.TCPRouter{}
|
|
}
|
|
for routerName, router := range from.TCP.Routers {
|
|
to.TCP.Routers[routerName] = router
|
|
}
|
|
|
|
if to.TCP.Middlewares == nil {
|
|
to.TCP.Middlewares = map[string]*dynamic.TCPMiddleware{}
|
|
}
|
|
for middlewareName, middleware := range from.TCP.Middlewares {
|
|
to.TCP.Middlewares[middlewareName] = middleware
|
|
}
|
|
|
|
if to.TCP.Services == nil {
|
|
to.TCP.Services = map[string]*dynamic.TCPService{}
|
|
}
|
|
for serviceName, service := range from.TCP.Services {
|
|
to.TCP.Services[serviceName] = service
|
|
}
|
|
}
|