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httproute.go
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httproute.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package gateway_api
import (
"context"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
gatewayv1alpha2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
gatewayv1beta1 "sigs.k8s.io/gateway-api/apis/v1beta1"
"github.com/cilium/cilium/pkg/logging/logfields"
)
const (
backendServiceIndex = "backendServiceIndex"
gatewayIndex = "gatewayIndex"
)
type httpRouteChecker func(ctx context.Context, client client.Client, grants *gatewayv1alpha2.ReferenceGrantList, hr *gatewayv1beta1.HTTPRoute) (ctrl.Result, error)
// httpRouteReconciler reconciles a HTTPRoute object
type httpRouteReconciler struct {
client.Client
Scheme *runtime.Scheme
Model *internalModel
}
// SetupWithManager sets up the controller with the Manager.
func (r *httpRouteReconciler) SetupWithManager(mgr ctrl.Manager) error {
if err := mgr.GetFieldIndexer().IndexField(context.Background(), &gatewayv1beta1.HTTPRoute{}, backendServiceIndex,
func(rawObj client.Object) []string {
hr, ok := rawObj.(*gatewayv1beta1.HTTPRoute)
if !ok {
return nil
}
var backendServices []string
for _, rule := range hr.Spec.Rules {
for _, backend := range rule.BackendRefs {
if !IsService(backend.BackendObjectReference) {
continue
}
backendServices = append(backendServices,
types.NamespacedName{
Namespace: namespaceDerefOr(backend.Namespace, hr.Namespace),
Name: string(backend.Name),
}.String(),
)
}
}
return backendServices
},
); err != nil {
return err
}
if err := mgr.GetFieldIndexer().IndexField(context.Background(), &gatewayv1beta1.HTTPRoute{}, gatewayIndex,
func(rawObj client.Object) []string {
hr := rawObj.(*gatewayv1beta1.HTTPRoute)
var gateways []string
for _, parent := range hr.Spec.ParentRefs {
if !IsGateway(parent) {
continue
}
gateways = append(gateways,
types.NamespacedName{
Namespace: namespaceDerefOr(parent.Namespace, hr.Namespace),
Name: string(parent.Name),
}.String(),
)
}
return gateways
},
); err != nil {
return err
}
return ctrl.NewControllerManagedBy(mgr).
// Watch for changes to HTTPRoute
For(&gatewayv1beta1.HTTPRoute{}).
// Watch for changes to Backend services
Watches(&source.Kind{Type: &corev1.Service{}}, r.enqueueRequestForBackendService()).
// Watch for changes to Gateways and enqueue HTTPRoutes that reference them,
Watches(&source.Kind{Type: &gatewayv1beta1.Gateway{}}, r.enqueueRequestForGateway(),
builder.WithPredicates(
predicate.NewPredicateFuncs(hasMatchingController(context.Background(), mgr.GetClient(), controllerName)))).
Complete(r)
}
// enqueueRequestForBackendService makes sure that HTTP Routes are reconciled
// if the backend services are updated.
func (r *httpRouteReconciler) enqueueRequestForBackendService() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(r.enqueueFromIndex(backendServiceIndex))
}
func (r *httpRouteReconciler) enqueueRequestForGateway() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(r.enqueueFromIndex(gatewayIndex))
}
func (r *httpRouteReconciler) enqueueFromIndex(index string) func(o client.Object) []reconcile.Request {
return func(o client.Object) []reconcile.Request {
scopedLog := log.WithFields(logrus.Fields{
logfields.Controller: "httpRoute",
logfields.Resource: client.ObjectKeyFromObject(o),
})
hrList := &gatewayv1beta1.HTTPRouteList{}
if err := r.Client.List(context.Background(), hrList, &client.ListOptions{
FieldSelector: fields.OneTermEqualSelector(index, client.ObjectKeyFromObject(o).String()),
}); err != nil {
scopedLog.WithError(err).Error("Failed to get related HTTPRoutes")
return []reconcile.Request{}
}
requests := make([]reconcile.Request, 0, len(hrList.Items))
for _, item := range hrList.Items {
route := client.ObjectKey{
Namespace: item.GetNamespace(),
Name: item.GetName(),
}
requests = append(requests, reconcile.Request{
NamespacedName: route,
})
scopedLog.WithField("httpRoute", route).Info("Enqueued HTTPRoute for resource")
}
return requests
}
}