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ensurer.go
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ensurer.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 controlplaneexposure
import (
"context"
druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
"github.com/gardener/gardener-extension-provider-azure/pkg/apis/config"
"github.com/gardener/gardener/extensions/pkg/controller"
extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
"github.com/gardener/gardener/extensions/pkg/webhook/controlplane/genericmutator"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
v1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/go-logr/logr"
"github.com/pkg/errors"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// NewEnsurer creates a new controlplaneexposure ensurer.
func NewEnsurer(etcdStorage *config.ETCDStorage, logger logr.Logger) genericmutator.Ensurer {
return &ensurer{
etcdStorage: etcdStorage,
logger: logger.WithName("ensurer"),
}
}
type ensurer struct {
genericmutator.NoopEnsurer
etcdStorage *config.ETCDStorage
client client.Client
logger logr.Logger
}
// InjectClient injects the given client into the ensurer.
func (e *ensurer) InjectClient(client client.Client) error {
e.client = client
return nil
}
// EnsureKubeAPIServerService ensures that the kube-apiserver service conforms to the provider requirements.
func (e *ensurer) EnsureKubeAPIServerService(ctx context.Context, ectx genericmutator.EnsurerContext, new, old *corev1.Service) error {
if v1beta1helper.IsAPIServerExposureManaged(new) {
return nil
}
// TODO: Assuming seed kubernetes version is >= 1.12. Validate it correctly
if new.Annotations == nil {
new.Annotations = make(map[string]string)
}
new.Annotations["service.beta.kubernetes.io/azure-load-balancer-tcp-idle-timeout"] = "30"
return nil
}
// EnsureKubeAPIServerDeployment ensures that the kube-apiserver deployment conforms to the provider requirements.
func (e *ensurer) EnsureKubeAPIServerDeployment(ctx context.Context, ectx genericmutator.EnsurerContext, new, old *appsv1.Deployment) error {
if v1beta1helper.IsAPIServerExposureManaged(new) {
return nil
}
cluster, err := controller.GetCluster(ctx, e.client, new.Namespace)
if err != nil {
return err
}
if controller.IsHibernated(cluster) {
return nil
}
// Get load balancer address of the kube-apiserver service
address, err := kutil.GetLoadBalancerIngress(ctx, e.client, new.Namespace, v1beta1constants.DeploymentNameKubeAPIServer)
if err != nil {
return errors.Wrap(err, "could not get kube-apiserver service load balancer address")
}
if c := extensionswebhook.ContainerWithName(new.Spec.Template.Spec.Containers, "kube-apiserver"); c != nil {
c.Command = extensionswebhook.EnsureStringWithPrefix(c.Command, "--advertise-address=", address)
c.Command = extensionswebhook.EnsureStringWithPrefix(c.Command, "--external-hostname=", address)
}
return nil
}
// EnsureETCD ensures that the etcd conform to the provider requirements.
func (e *ensurer) EnsureETCD(ctx context.Context, ectx genericmutator.EnsurerContext, new, old *druidv1alpha1.Etcd) error {
capacity := resource.MustParse("10Gi")
class := ""
if new.Name == v1beta1constants.ETCDMain && e.etcdStorage != nil {
if e.etcdStorage.Capacity != nil {
capacity = *e.etcdStorage.Capacity
}
if e.etcdStorage.ClassName != nil {
class = *e.etcdStorage.ClassName
}
}
new.Spec.StorageClass = &class
new.Spec.StorageCapacity = &capacity
return nil
}