generated from kubernetes/kubernetes-template-project
/
checker.go
173 lines (152 loc) · 6.52 KB
/
checker.go
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/*
Copyright 2021 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package ingress
import (
"context"
"fmt"
"sync"
"sync/atomic"
networkingv1 "k8s.io/api/networking/v1"
"k8s.io/apimachinery/pkg/api/equality"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/constants"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/conversion"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/metrics"
"sigs.k8s.io/cluster-api-provider-nested/virtualcluster/pkg/syncer/util"
)
var numSpecMissMatchedIngresses uint64
var numStatusMissMatchedIngresses uint64
var numUWMetaMissMatchedIngresses uint64
func (c *controller) StartPatrol(stopCh <-chan struct{}) error {
if !cache.WaitForCacheSync(stopCh, c.ingressSynced) {
return fmt.Errorf("failed to wait for caches to sync before starting Ingress checker")
}
c.Patroller.Start(stopCh)
return nil
}
// PatrollerDo check if ingresss keep consistency between super
// control plane and tenant control planes.
func (c *controller) PatrollerDo() {
clusterNames := c.MultiClusterController.GetClusterNames()
if len(clusterNames) == 0 {
klog.V(5).Infof("super cluster has no tenant control planes, giving up periodic checker: %s", "ingress")
return
}
wg := sync.WaitGroup{}
numSpecMissMatchedIngresses = 0
numStatusMissMatchedIngresses = 0
numUWMetaMissMatchedIngresses = 0
for _, clusterName := range clusterNames {
wg.Add(1)
go func(clusterName string) {
defer wg.Done()
c.checkIngressesOfTenantCluster(clusterName)
}(clusterName)
}
wg.Wait()
pIngresses, err := c.ingressLister.List(util.GetSuperClusterListerLabelsSelector())
if err != nil {
klog.Errorf("error listing ingresses from super control plane informer cache: %v", err)
return
}
for _, pIngress := range pIngresses {
clusterName, vNamespace := conversion.GetVirtualOwner(pIngress)
if len(clusterName) == 0 || len(vNamespace) == 0 {
continue
}
shouldDelete := false
vIngress := &networkingv1.Ingress{}
err := c.MultiClusterController.Get(clusterName, vNamespace, pIngress.Name, vIngress)
if apierrors.IsNotFound(err) {
shouldDelete = true
}
if err == nil {
if pIngress.Annotations[constants.LabelUID] != string(vIngress.UID) {
shouldDelete = true
klog.Warningf("Found pIngress %s/%s delegated UID is different from tenant object.", pIngress.Namespace, pIngress.Name)
}
}
if shouldDelete {
deleteOptions := metav1.NewPreconditionDeleteOptions(string(pIngress.UID))
if err = c.ingressClient.Ingresses(pIngress.Namespace).Delete(context.TODO(), pIngress.Name, *deleteOptions); err != nil {
klog.Errorf("error deleting pIngress %s/%s in super control plane: %v", pIngress.Namespace, pIngress.Name, err)
} else {
metrics.CheckerRemedyStats.WithLabelValues("DeletedOrphanSuperControlPlaneIngresses").Inc()
}
}
}
metrics.CheckerMissMatchStats.WithLabelValues("SpecMissMatchedIngresses").Set(float64(numSpecMissMatchedIngresses))
metrics.CheckerMissMatchStats.WithLabelValues("StatusMissMatchedIngresses").Set(float64(numStatusMissMatchedIngresses))
metrics.CheckerMissMatchStats.WithLabelValues("UWMetaMissMatchedIngresses").Set(float64(numUWMetaMissMatchedIngresses))
}
func (c *controller) checkIngressesOfTenantCluster(clusterName string) {
ingList := &networkingv1.IngressList{}
if err := c.MultiClusterController.List(clusterName, ingList); err != nil {
klog.Errorf("error listing ingresss from cluster %s informer cache: %v", clusterName, err)
return
}
klog.V(4).Infof("check ingresss consistency in cluster %s", clusterName)
for i, vIngress := range ingList.Items {
targetNamespace := conversion.ToSuperClusterNamespace(clusterName, vIngress.Namespace)
pIngress, err := c.ingressLister.Ingresses(targetNamespace).Get(vIngress.Name)
if apierrors.IsNotFound(err) {
if err := c.MultiClusterController.RequeueObject(clusterName, &ingList.Items[i]); err != nil {
klog.Errorf("error requeue vingress %v/%v in cluster %s: %v", vIngress.Namespace, vIngress.Name, clusterName, err)
} else {
metrics.CheckerRemedyStats.WithLabelValues("RequeuedTenantIngresses").Inc()
}
continue
}
if err != nil {
klog.Errorf("failed to get pIngress %s/%s from super control plane cache: %v", targetNamespace, vIngress.Name, err)
continue
}
if pIngress.Annotations[constants.LabelUID] != string(vIngress.UID) {
klog.Errorf("Found pIngress %s/%s delegated UID is different from tenant object.", targetNamespace, pIngress.Name)
continue
}
vc, err := util.GetVirtualClusterObject(c.MultiClusterController, clusterName)
if err != nil {
klog.Errorf("fail to get cluster spec : %s", clusterName)
continue
}
updatedIngress := conversion.Equality(c.Config, vc).CheckIngressEquality(pIngress, &ingList.Items[i])
if updatedIngress != nil {
atomic.AddUint64(&numSpecMissMatchedIngresses, 1)
klog.Warningf("spec of ingress %v/%v diff in super&tenant control plane", vIngress.Namespace, vIngress.Name)
if err := c.MultiClusterController.RequeueObject(clusterName, &ingList.Items[i]); err != nil {
klog.Errorf("error requeue vingress %v/%v in cluster %s: %v", vIngress.Namespace, vIngress.Name, clusterName, err)
} else {
metrics.CheckerRemedyStats.WithLabelValues("RequeuedTenantIngresses").Inc()
}
}
enqueue := false
updatedMeta := conversion.Equality(c.Config, vc).CheckUWObjectMetaEquality(&pIngress.ObjectMeta, &ingList.Items[i].ObjectMeta)
if updatedMeta != nil {
atomic.AddUint64(&numUWMetaMissMatchedIngresses, 1)
enqueue = true
klog.Warningf("UWObjectMeta of vIngress %v/%v diff in super&tenant control plane", vIngress.Namespace, vIngress.Name)
}
if !equality.Semantic.DeepEqual(vIngress.Status, pIngress.Status) {
enqueue = true
atomic.AddUint64(&numStatusMissMatchedIngresses, 1)
klog.Warningf("Status of vIngress %v/%v diff in super&tenant control plane", vIngress.Namespace, vIngress.Name)
}
if enqueue {
c.enqueueIngress(pIngress)
}
}
}