forked from gardener-attic/gardener-extensions
/
controller.go
102 lines (89 loc) · 3.83 KB
/
controller.go
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// Copyright (c) 2019 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 infrastructure
import (
extensionscontroller "github.com/gardener/gardener-extensions/pkg/controller"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"sigs.k8s.io/controller-runtime/pkg/client"
corev1 "k8s.io/api/core/v1"
"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"
)
const (
// FinalizerName is the infrastructure controller finalizer.
FinalizerName = "extensions.gardener.cloud/infrastructure"
// ControllerName is the name of the controller.
ControllerName = "infrastructure-controller"
)
// AddArgs are arguments for adding an infrastructure controller to a manager.
type AddArgs struct {
// Actuator is an infrastructure actuator.
Actuator Actuator
// ControllerOptions are the controller options used for creating a controller.
// The options.Reconciler is always overridden with a reconciler created from the
// given actuator.
ControllerOptions controller.Options
// Predicates are the predicates to use.
// If unset, GenerationChangedPredicate will be used.
Predicates []predicate.Predicate
// WatchBuilder defines additional watches on controllers that should be set up.
WatchBuilder extensionscontroller.WatchBuilder
}
// DefaultPredicates returns the default predicates for an infrastructure reconciler.
func DefaultPredicates(client client.Client, typeName string, ignoreOperationAnnotation bool) []predicate.Predicate {
if ignoreOperationAnnotation {
return []predicate.Predicate{
extensionscontroller.TypePredicate(typeName),
extensionscontroller.ShootFailedPredicate(client),
extensionscontroller.GenerationChangedPredicate(),
}
}
return []predicate.Predicate{
extensionscontroller.TypePredicate(typeName),
extensionscontroller.ShootFailedPredicate(client),
OperationAnnotationPredicate(),
extensionscontroller.OrPredicate(
extensionscontroller.GenerationChangedPredicate(),
extensionscontroller.AnnotationsChangedPredicate(),
),
}
}
// Add creates a new Infrastructure Controller and adds it to the Manager.
// and Start it when the Manager is Started.
func Add(mgr manager.Manager, args AddArgs) error {
args.ControllerOptions.Reconciler = NewReconciler(mgr, args.Actuator)
return add(mgr, args)
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, args AddArgs) error {
ctrl, err := controller.New(ControllerName, mgr, args.ControllerOptions)
if err != nil {
return err
}
if err := ctrl.Watch(&source.Kind{Type: &extensionsv1alpha1.Infrastructure{}}, &handler.EnqueueRequestForObject{}, args.Predicates...); err != nil {
return err
}
if err := ctrl.Watch(&source.Kind{Type: &corev1.Secret{}}, &handler.EnqueueRequestsFromMapFunc{ToRequests: SecretToInfrastructureMapper(mgr.GetClient(), args.Predicates)}); err != nil {
return err
}
// Add additional watches to the controller besides the standard one.
err = args.WatchBuilder.AddToController(ctrl)
if err != nil {
return err
}
return nil
}