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ingress_dedicated.go
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/
ingress_dedicated.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package ingress
import (
"context"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/cache"
ciliumv2 "github.com/cilium/cilium/pkg/k8s/apis/cilium.io/v2"
slim_networkingv1 "github.com/cilium/cilium/pkg/k8s/slim/k8s/api/networking/v1"
"github.com/cilium/cilium/pkg/logging/logfields"
)
func (ic *Controller) createLoadBalancer(svc *corev1.Service) error {
if svc == nil {
return nil
}
svcKey, err := cache.MetaNamespaceKeyFunc(svc)
if err != nil {
log.Warn("Failed to get service key for ingress")
return err
}
_, exists, err := ic.serviceManager.getByKey(svcKey)
if err != nil {
log.WithError(err).Warn("Service lookup returned an error")
return err
}
if exists {
// Service already exists in the cache. For now assume that it was created by the ingress
// controller.
log.WithField(logfields.ServiceKey, svcKey).Debug("Service already exists. Continuing...")
return nil
}
_, err = ic.clientset.CoreV1().Services(svc.GetNamespace()).Create(context.Background(), svc, metav1.CreateOptions{})
if err != nil {
log.WithError(err).Error("Failed to create a service for ingress")
return err
}
log.WithField(logfields.ServiceKey, svcKey).Debug("Created Service for Ingress")
return nil
}
func (ic *Controller) createEndpoints(endpoints *corev1.Endpoints) error {
if endpoints == nil {
return nil
}
key, err := cache.MetaNamespaceKeyFunc(endpoints)
if err != nil {
return err
}
// check if the endpoints resource already exists
_, exists, err := ic.endpointManager.getByKey(key)
if err != nil {
log.WithError(err).Warn("Endpoints lookup returned an error")
return err
}
if exists {
// Endpoints already exists in the cache. For now assume that it was created by the ingress
// controller.
log.WithField(logfields.Endpoint, key).Debug("Endpoints already exists. Continuing...")
return nil
}
_, err = ic.clientset.CoreV1().Endpoints(endpoints.GetNamespace()).Create(context.Background(), endpoints, metav1.CreateOptions{})
if err != nil {
log.WithError(err).Error("Failed to create endpoints for ingress")
return err
}
log.WithField(logfields.Endpoint, key).Debug("Created Endpoints for Ingress")
return nil
}
func (ic *Controller) deleteResources(ing *slim_networkingv1.Ingress) error {
cec, svc, ep, err := ic.regenerate(ing, false)
if err != nil {
log.WithError(err).Warn("Failed to generate resources")
return err
}
if err = ic.deleteCiliumEnvoyConfig(cec); err != nil {
log.WithError(err).Warn("Failed to delete CiliumEnvoyConfig")
return err
}
if err = ic.deleteService(svc); err != nil {
log.WithError(err).Warn("Failed to delete load balancer")
return err
}
if err = ic.deleteEndpoint(ep); err != nil {
log.WithError(err).Warn("Failed to delete endpoints")
return err
}
return nil
}
func (ic *Controller) deleteCiliumEnvoyConfig(cec *ciliumv2.CiliumEnvoyConfig) error {
if cec == nil {
return nil
}
// check if the CiliumEnvoyConfig resource exists.
key, err := cache.MetaNamespaceKeyFunc(cec)
if err != nil {
return err
}
_, exists, err := ic.envoyConfigManager.getByKey(key)
if err != nil {
log.WithError(err).Warn("CiliumEnvoyConfig lookup failed")
return err
}
scopedLog := log.WithField(logfields.CiliumEnvoyConfigName, cec.GetName())
if !exists {
scopedLog.Debug("CiliumEnvoyConfig already deleted. Continuing...")
return nil
}
err = ic.clientset.CiliumV2().CiliumEnvoyConfigs(cec.GetNamespace()).Delete(context.Background(), cec.GetName(), metav1.DeleteOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
scopedLog.Error("Failed to delete CiliumEnvoyConfig for ingress")
return err
}
scopedLog.Debug("Deleted CiliumEnvoyConfig")
return nil
}
func (ic *Controller) deleteService(svc *corev1.Service) error {
if svc == nil {
return nil
}
// check if the Service resource exists.
key, err := cache.MetaNamespaceKeyFunc(svc)
if err != nil {
return err
}
_, exists, err := ic.serviceManager.getByKey(key)
if err != nil {
log.WithError(err).Warn("Service lookup failed")
return err
}
scopedLog := log.WithField(logfields.CiliumEnvoyConfigName, svc.GetName())
if !exists {
scopedLog.Debug("Service already deleted. Continuing...")
return nil
}
err = ic.clientset.CoreV1().Services(svc.GetNamespace()).Delete(context.Background(), svc.GetName(), metav1.DeleteOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
scopedLog.Error("Failed to delete service for ingress")
return err
}
scopedLog.Debug("Deleted service")
return nil
}
func (ic *Controller) deleteEndpoint(ep *corev1.Endpoints) error {
if ep == nil {
return nil
}
// check if the Endpoint resource exists.
key, err := cache.MetaNamespaceKeyFunc(ep)
if err != nil {
return err
}
_, exists, err := ic.serviceManager.getByKey(key)
if err != nil {
log.WithError(err).Warn("Endpoint lookup failed")
return err
}
scopedLog := log.WithField(logfields.CiliumEnvoyConfigName, ep.GetName())
if !exists {
scopedLog.Debug("Endpoint already deleted. Continuing...")
return nil
}
err = ic.clientset.CoreV1().Endpoints(ep.GetNamespace()).Delete(context.Background(), ep.GetName(), metav1.DeleteOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
scopedLog.Error("Failed to delete endpoint for ingress")
return err
}
scopedLog.Debug("Deleted endpoint")
return nil
}