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actuator.go
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actuator.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 infrastructure
import (
"context"
extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
"github.com/gardener/gardener/extensions/pkg/controller/common"
"github.com/gardener/gardener/extensions/pkg/controller/infrastructure"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/provider-local/local"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
)
type actuator struct {
logger logr.Logger
common.RESTConfigContext
}
// NewActuator creates a new Actuator that updates the status of the handled Infrastructure resources.
func NewActuator() infrastructure.Actuator {
return &actuator{
logger: log.Log.WithName("infrastructure-actuator"),
}
}
func (a *actuator) Reconcile(ctx context.Context, infrastructure *extensionsv1alpha1.Infrastructure, _ *extensionscontroller.Cluster) error {
networkPolicy := emptyNetworkPolicy(infrastructure.Namespace)
networkPolicy.Spec = networkingv1.NetworkPolicySpec{
Egress: []networkingv1.NetworkPolicyEgressRule{{
To: []networkingv1.NetworkPolicyPeer{{
PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{"app": "machine"}},
}},
}},
PodSelector: metav1.LabelSelector{
MatchLabels: map[string]string{v1beta1constants.LabelNetworkPolicyToShootNetworks: v1beta1constants.LabelNetworkPolicyAllowed},
},
PolicyTypes: []networkingv1.PolicyType{networkingv1.PolicyTypeEgress},
}
if err := a.Client().Patch(ctx, networkPolicy, client.Apply, local.FieldOwner, client.ForceOwnership); err != nil {
return err
}
service := emptyVPNShootService(infrastructure.Namespace)
service.Spec = corev1.ServiceSpec{
Type: corev1.ServiceTypeClusterIP,
Selector: map[string]string{"app": "machine"},
Ports: []corev1.ServicePort{{
Name: "vpn",
Port: 4314,
TargetPort: intstr.FromInt(30123),
}},
}
return a.Client().Patch(ctx, service, client.Apply, local.FieldOwner, client.ForceOwnership)
}
func (a *actuator) Delete(ctx context.Context, infrastructure *extensionsv1alpha1.Infrastructure, _ *extensionscontroller.Cluster) error {
return kutil.DeleteObjects(ctx, a.Client(),
emptyNetworkPolicy(infrastructure.Namespace),
emptyVPNShootService(infrastructure.Namespace),
)
}
func (a *actuator) Migrate(ctx context.Context, infrastructure *extensionsv1alpha1.Infrastructure, cluster *extensionscontroller.Cluster) error {
return a.Delete(ctx, infrastructure, cluster)
}
func (a *actuator) Restore(ctx context.Context, infrastructure *extensionsv1alpha1.Infrastructure, cluster *extensionscontroller.Cluster) error {
return a.Reconcile(ctx, infrastructure, cluster)
}
func emptyNetworkPolicy(namespace string) *networkingv1.NetworkPolicy {
return &networkingv1.NetworkPolicy{
TypeMeta: metav1.TypeMeta{
APIVersion: networkingv1.SchemeGroupVersion.String(),
Kind: "NetworkPolicy",
},
ObjectMeta: metav1.ObjectMeta{
Name: "allow-to-worker-nodes",
Namespace: namespace,
},
}
}
func emptyVPNShootService(namespace string) *corev1.Service {
return &corev1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: "vpn-shoot",
},
}
}