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add.go
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add.go
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// Copyright 2022 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 progressing
import (
"context"
certv1alpha1 "github.com/gardener/cert-management/pkg/apis/cert/v1alpha1"
"github.com/go-logr/logr"
monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/utils/clock"
"k8s.io/utils/ptr"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/cluster"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils/mapper"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
"github.com/gardener/gardener/pkg/resourcemanager/controller/health/utils"
resourcemanagerpredicate "github.com/gardener/gardener/pkg/resourcemanager/predicate"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
)
// ControllerName is the name of the controller.
const ControllerName = "health-progressing"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(ctx context.Context, mgr manager.Manager, sourceCluster, targetCluster cluster.Cluster, clusterID string) error {
if r.SourceClient == nil {
r.SourceClient = sourceCluster.GetClient()
}
if r.TargetClient == nil {
r.TargetClient = targetCluster.GetClient()
}
if r.Clock == nil {
r.Clock = clock.RealClock{}
}
c, err := builder.
ControllerManagedBy(mgr).
Named(ControllerName).
For(&resourcesv1alpha1.ManagedResource{}, builder.WithPredicates(
predicate.Or(
resourcemanagerpredicate.ClassChangedPredicate(),
// start health checks immediately after MR has been reconciled
resourcemanagerpredicate.ConditionStatusChanged(resourcesv1alpha1.ResourcesApplied, resourcemanagerpredicate.DefaultConditionChange),
resourcemanagerpredicate.NoLongerIgnored(),
),
resourcemanagerpredicate.NotIgnored(),
r.ClassFilter,
)).
WithOptions(controller.Options{
MaxConcurrentReconciles: ptr.Deref(r.Config.ConcurrentSyncs, 0),
}).
Build(r)
if err != nil {
return err
}
for resource, obj := range map[string]client.Object{
"deployments": &appsv1.Deployment{},
"statefulsets": &appsv1.StatefulSet{},
"daemonsets": &appsv1.DaemonSet{},
"prometheuses": &monitoringv1.Prometheus{},
"alertmanagers": &monitoringv1.Alertmanager{},
"certificates": &certv1alpha1.Certificate{},
"issuers": &certv1alpha1.Issuer{},
} {
gvr := schema.GroupVersionResource{Group: appsv1.SchemeGroupVersion.Group, Version: appsv1.SchemeGroupVersion.Version, Resource: resource}
if _, err := targetCluster.GetRESTMapper().KindFor(gvr); err != nil {
if !meta.IsNoMatchError(err) {
return err
}
c.GetLogger().Info("Resource is not available/enabled API of the target cluster, skip adding watches", "gvr", gvr)
continue
}
if err := c.Watch(
source.Kind(targetCluster.GetCache(), obj),
mapper.EnqueueRequestsFrom(ctx, mgr.GetCache(), utils.MapToOriginManagedResource(clusterID), mapper.UpdateWithNew, c.GetLogger()),
r.ProgressingStatusChanged(ctx),
); err != nil {
return err
}
if resource == "deployments" {
// Watch relevant objects for Progressing condition in order to immediately update the condition as soon as
// there is a change on managed resources.
pod := &metav1.PartialObjectMetadata{}
pod.SetGroupVersionKind(corev1.SchemeGroupVersion.WithKind("Pod"))
if err := c.Watch(
source.Kind(targetCluster.GetCache(), pod),
mapper.EnqueueRequestsFrom(ctx, mgr.GetCache(), r.MapPodToDeploymentToOriginManagedResource(clusterID), mapper.UpdateWithNew, c.GetLogger()),
predicateutils.ForEventTypes(predicateutils.Create, predicateutils.Delete),
); err != nil {
return err
}
}
}
return nil
}
// ProgressingStatusChanged returns a predicate that filters for events that indicate a change in the object's
// progressing status.
func (r *Reconciler) ProgressingStatusChanged(ctx context.Context) predicate.Predicate {
return predicate.Funcs{
CreateFunc: func(_ event.CreateEvent) bool { return false },
UpdateFunc: func(e event.UpdateEvent) bool {
if e.ObjectOld.GetResourceVersion() == e.ObjectNew.GetResourceVersion() {
// periodic cache resync, enqueue
return true
}
oldProgressing, _, _ := r.checkProgressing(ctx, e.ObjectOld)
newProgressing, _, _ := r.checkProgressing(ctx, e.ObjectNew)
return oldProgressing != newProgressing
},
DeleteFunc: func(_ event.DeleteEvent) bool { return false },
GenericFunc: func(_ event.GenericEvent) bool { return false },
}
}
// MapPodToDeploymentToOriginManagedResource is a mapper.MapFunc for pods to their origin Deployment and origin
// ManagedResource.
func (r *Reconciler) MapPodToDeploymentToOriginManagedResource(clusterID string) mapper.MapFunc {
return func(ctx context.Context, log logr.Logger, reader client.Reader, obj client.Object) []reconcile.Request {
deployment, err := kubernetesutils.GetDeploymentForPod(ctx, reader, obj.GetNamespace(), obj.GetOwnerReferences())
if err != nil {
log.Error(err, "Failed getting Deployment for Pod", "pod", client.ObjectKeyFromObject(obj))
return nil
}
if deployment == nil {
return nil
}
return utils.MapToOriginManagedResource(clusterID)(ctx, log, reader, deployment)
}
}