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add.go
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add.go
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// Copyright 2023 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 node
import (
corev1 "k8s.io/api/core/v1"
"k8s.io/utils/pointer"
"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/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/source"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
)
// ControllerName is the name of the controller.
const ControllerName = "node"
// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(mgr manager.Manager, targetCluster cluster.Cluster) error {
if r.TargetClient == nil {
r.TargetClient = targetCluster.GetClient()
}
if r.Recorder == nil {
r.Recorder = targetCluster.GetEventRecorderFor("gardener-" + ControllerName + "-controller") // node-controller is ambiguous
}
return builder.
ControllerManagedBy(mgr).
Named(ControllerName).
WithOptions(controller.Options{
MaxConcurrentReconciles: pointer.IntDeref(r.Config.ConcurrentSyncs, 0),
}).
Watches(
source.NewKindWithCache(&corev1.Node{}, targetCluster.GetCache()),
&handler.EnqueueRequestForObject{},
builder.WithPredicates(r.NodePredicate()),
).
Complete(r)
}
// NodePredicate returns a predicate that filters for Node objects that are created with the taint.
func (r *Reconciler) NodePredicate() predicate.Predicate {
return predicate.And(
predicateutils.ForEventTypes(predicateutils.Create),
predicate.NewPredicateFuncs(func(obj client.Object) bool {
return NodeHasCriticalComponentsNotReadyTaint(obj)
}),
)
}
// NodeHasCriticalComponentsNotReadyTaint returns true if the given Node has the taint that this controller manages.
func NodeHasCriticalComponentsNotReadyTaint(obj client.Object) bool {
node, ok := obj.(*corev1.Node)
if !ok {
return false
}
for _, taint := range node.Spec.Taints {
if taint.Key == v1beta1constants.TaintNodeCriticalComponentsNotReady {
return true
}
}
return false
}