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add.go
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add.go
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// Copyright (c) 2021 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 service
import (
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/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"
)
// ControllerName is the name of the controller.
const ControllerName = "service_controller"
// DefaultAddOptions are the default AddOptions for AddToManager.
var DefaultAddOptions = AddOptions{}
// AddOptions are options to apply when adding the local infrastructure controller to the manager.
type AddOptions struct {
// Controller are the controller.Options.
Controller controller.Options
// HostIP is the IP address of the host.
HostIP string
// APIServerSNIEnabled states whether the APIServerSNI feature gate of the gardenlet is set to true.
APIServerSNIEnabled bool
}
// AddToManagerWithOptions adds a controller with the given Options to the given manager.
// The opts.Reconciler is being set with a newly instantiated actuator.
func AddToManagerWithOptions(mgr manager.Manager, opts AddOptions) error {
opts.Controller.Reconciler = NewReconciler(opts.HostIP)
opts.Controller.RecoverPanic = true
ctrl, err := controller.New(ControllerName, mgr, opts.Controller)
if err != nil {
return err
}
selectorPredicate, err := predicate.LabelSelectorPredicate(metav1.LabelSelector{MatchExpressions: matchExpressions(opts.APIServerSNIEnabled)})
if err != nil {
return err
}
return ctrl.Watch(&source.Kind{Type: &corev1.Service{}}, &handler.EnqueueRequestForObject{}, selectorPredicate)
}
// AddToManager adds a controller with the default Options.
func AddToManager(mgr manager.Manager) error {
return AddToManagerWithOptions(mgr, DefaultAddOptions)
}
func matchExpressions(apiServerSNIEnabled bool) []metav1.LabelSelectorRequirement {
if apiServerSNIEnabled {
return []metav1.LabelSelectorRequirement{
{
Key: "app",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"istio-ingressgateway"},
},
{
Key: "istio",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"ingressgateway"},
},
}
}
return []metav1.LabelSelectorRequirement{
{
Key: v1beta1constants.LabelApp,
Operator: metav1.LabelSelectorOpIn,
Values: []string{v1beta1constants.LabelKubernetes},
},
{
Key: v1beta1constants.LabelRole,
Operator: metav1.LabelSelectorOpIn,
Values: []string{v1beta1constants.LabelAPIServer},
},
{
Key: v1beta1constants.LabelAPIServerExposure,
Operator: metav1.LabelSelectorOpNotIn,
Values: []string{v1beta1constants.LabelAPIServerExposureGardenerManaged},
},
}
}