forked from gardener-attic/gardener-extensions
/
ensurer.go
126 lines (114 loc) · 4.56 KB
/
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 controlplanebackup
import (
"context"
"github.com/gardener/gardener-extensions/controllers/provider-azure/pkg/apis/config"
"github.com/gardener/gardener-extensions/controllers/provider-azure/pkg/azure"
extensionscontroller "github.com/gardener/gardener-extensions/pkg/controller"
"github.com/gardener/gardener-extensions/pkg/webhook/controlplane"
"github.com/gardener/gardener-extensions/pkg/webhook/controlplane/genericmutator"
"github.com/gardener/gardener/pkg/operation/common"
"github.com/gardener/gardener/pkg/utils/imagevector"
"github.com/go-logr/logr"
"github.com/pkg/errors"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
)
// NewEnsurer creates a new controlplaneexposure ensurer.
func NewEnsurer(etcdBackup *config.ETCDBackup, imageVector imagevector.ImageVector, logger logr.Logger) genericmutator.Ensurer {
return &ensurer{
etcdBackup: etcdBackup,
imageVector: imageVector,
logger: logger.WithName("azure-controlplanebackup-ensurer"),
}
}
type ensurer struct {
genericmutator.NoopEnsurer
etcdBackup *config.ETCDBackup
imageVector imagevector.ImageVector
logger logr.Logger
}
// EnsureETCDStatefulSet ensures that the etcd stateful sets conform to the provider requirements.
func (e *ensurer) EnsureETCDStatefulSet(ctx context.Context, ss *appsv1.StatefulSet, cluster *extensionscontroller.Cluster) error {
if err := e.ensureContainers(&ss.Spec.Template.Spec, ss.Name, cluster); err != nil {
return err
}
return nil
}
func (e *ensurer) ensureContainers(ps *corev1.PodSpec, name string, cluster *extensionscontroller.Cluster) error {
c, err := e.getBackupRestoreContainer(name, cluster)
if err != nil {
return err
}
ps.Containers = controlplane.EnsureContainerWithName(ps.Containers, *c)
return nil
}
func (e *ensurer) getBackupRestoreContainer(name string, cluster *extensionscontroller.Cluster) (*corev1.Container, error) {
// Find etcd-backup-restore image
// TODO Get seed version from clientset when it's possible to inject it
image, err := e.imageVector.FindImage(azure.ETCDBackupRestoreImageName, "", cluster.Shoot.Spec.Kubernetes.Version)
if err != nil {
return nil, errors.Wrapf(err, "could not find image %s", azure.ETCDBackupRestoreImageName)
}
const (
defaultSchedule = "0 */24 * * *"
)
// Determine provider, container env variables, and volume mounts
// They are only specified for the etcd-main stateful set (backup is enabled)
var (
provider string
env []corev1.EnvVar
)
if name == common.EtcdMainStatefulSetName {
provider = azure.StorageProviderName
env = []corev1.EnvVar{
{
Name: "STORAGE_CONTAINER",
// The bucket name is written to the backup secret by Gardener as a temporary solution.
// TODO In the future, the bucket name should come from a BackupBucket resource (see https://github.com/gardener/gardener/blob/master/docs/proposals/02-backupinfra.md)
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
Key: azure.BucketName,
LocalObjectReference: corev1.LocalObjectReference{Name: azure.BackupSecretName},
},
},
},
{
Name: "STORAGE_ACCOUNT",
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{Name: azure.BackupSecretName},
Key: azure.StorageAccount,
},
},
},
{
Name: "STORAGE_KEY",
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{Name: azure.BackupSecretName},
Key: azure.StorageKey,
},
},
},
}
}
// Determine schedule
var schedule = defaultSchedule
if e.etcdBackup.Schedule != nil {
schedule = defaultSchedule
}
return controlplane.GetBackupRestoreContainer(name, schedule, provider, image.String(), nil, env, nil), nil
}