/
dnsrecord.go
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/
dnsrecord.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 botanist
import (
"context"
"fmt"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/operation/botanist/component"
extensionsdnsrecord "github.com/gardener/gardener/pkg/operation/botanist/component/extensions/dnsrecord"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
)
// DefaultExternalDNSRecord creates the default deployer for the external DNSRecord resource.
func (b *Botanist) DefaultExternalDNSRecord() extensionsdnsrecord.Interface {
values := &extensionsdnsrecord.Values{
Name: b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordExternalName,
SecretName: DNSRecordSecretPrefix + "-" + b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordExternalName,
Namespace: b.Shoot.SeedNamespace,
TTL: b.Config.Controllers.Shoot.DNSEntryTTLSeconds,
AnnotateOperation: controllerutils.HasTask(b.Shoot.GetInfo().Annotations, v1beta1constants.ShootTaskDeployDNSRecordExternal) || b.isRestorePhase(),
}
if b.NeedsExternalDNS() {
values.Type = b.Shoot.ExternalDomain.Provider
if b.Shoot.ExternalDomain.Zone != "" {
values.Zone = &b.Shoot.ExternalDomain.Zone
}
values.SecretData = b.Shoot.ExternalDomain.SecretData
values.DNSName = gardenerutils.GetAPIServerDomain(*b.Shoot.ExternalClusterDomain)
}
return extensionsdnsrecord.New(
b.Logger,
b.SeedClientSet.Client(),
values,
extensionsdnsrecord.DefaultInterval,
extensionsdnsrecord.DefaultSevereThreshold,
extensionsdnsrecord.DefaultTimeout,
)
}
// DefaultInternalDNSRecord creates the default deployer for the internal DNSRecord resource.
func (b *Botanist) DefaultInternalDNSRecord() extensionsdnsrecord.Interface {
values := &extensionsdnsrecord.Values{
Name: b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordInternalName,
SecretName: DNSRecordSecretPrefix + "-" + b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordInternalName,
Namespace: b.Shoot.SeedNamespace,
TTL: b.Config.Controllers.Shoot.DNSEntryTTLSeconds,
ReconcileOnlyOnChangeOrError: b.Shoot.GetInfo().DeletionTimestamp != nil,
AnnotateOperation: b.Shoot.GetInfo().DeletionTimestamp != nil ||
controllerutils.HasTask(b.Shoot.GetInfo().Annotations, v1beta1constants.ShootTaskDeployDNSRecordInternal) ||
b.isRestorePhase(),
}
if b.NeedsInternalDNS() {
values.Type = b.Garden.InternalDomain.Provider
if b.Garden.InternalDomain.Zone != "" {
values.Zone = &b.Garden.InternalDomain.Zone
}
values.SecretData = b.Garden.InternalDomain.SecretData
values.DNSName = gardenerutils.GetAPIServerDomain(b.Shoot.InternalClusterDomain)
}
return extensionsdnsrecord.New(
b.Logger,
b.SeedClientSet.Client(),
values,
extensionsdnsrecord.DefaultInterval,
extensionsdnsrecord.DefaultSevereThreshold,
extensionsdnsrecord.DefaultTimeout,
)
}
// DefaultOwnerDNSRecord creates the default deployer for the owner DNSRecord resource.
func (b *Botanist) DefaultOwnerDNSRecord() extensionsdnsrecord.Interface {
values := &extensionsdnsrecord.Values{
Name: b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordOwnerName,
SecretName: DNSRecordSecretPrefix + "-" + b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordInternalName,
Namespace: b.Shoot.SeedNamespace,
TTL: b.Config.Controllers.Shoot.DNSEntryTTLSeconds,
ReconcileOnlyOnChangeOrError: true, // avoid competing reconciliations during the control plane migration "bad case" scenario
AnnotateOperation: true,
}
if b.NeedsInternalDNS() {
values.Type = b.Garden.InternalDomain.Provider
if b.Garden.InternalDomain.Zone != "" {
values.Zone = &b.Garden.InternalDomain.Zone
}
values.SecretData = b.Garden.InternalDomain.SecretData
values.DNSName = gardenerutils.GetOwnerDomain(b.Shoot.InternalClusterDomain)
values.RecordType = extensionsv1alpha1.DNSRecordTypeTXT
values.Values = []string{*b.Seed.GetInfo().Status.ClusterIdentity}
}
return extensionsdnsrecord.New(
b.Logger,
b.SeedClientSet.Client(),
values,
extensionsdnsrecord.DefaultInterval,
extensionsdnsrecord.DefaultSevereThreshold,
extensionsdnsrecord.DefaultTimeout,
)
}
// DeployOrDestroyExternalDNSRecord deploys, restores, or destroys the external DNSRecord and waits for the operation to complete.
func (b *Botanist) DeployOrDestroyExternalDNSRecord(ctx context.Context) error {
if b.NeedsExternalDNS() {
return b.deployExternalDNSRecord(ctx)
}
return b.DestroyExternalDNSRecord(ctx)
}
// DeployOrDestroyInternalDNSRecord deploys, restores, or destroys the internal DNSRecord and waits for the operation to complete.
func (b *Botanist) DeployOrDestroyInternalDNSRecord(ctx context.Context) error {
if b.NeedsInternalDNS() {
return b.deployInternalDNSRecord(ctx)
}
return b.DestroyInternalDNSRecord(ctx)
}
// DeployOrDestroyOwnerDNSRecord deploys, restores, or destroys the owner DNSRecord and waits for the operation to complete.
func (b *Botanist) DeployOrDestroyOwnerDNSRecord(ctx context.Context) error {
if b.NeedsInternalDNS() {
return b.DeployOwnerDNSRecord(ctx)
}
return b.DestroyOwnerDNSRecord(ctx)
}
// deployExternalDNSRecord deploys or restores the external DNSRecord and waits for the operation to complete.
func (b *Botanist) deployExternalDNSRecord(ctx context.Context) error {
if err := b.deployOrRestoreDNSRecord(ctx, b.Shoot.Components.Extensions.ExternalDNSRecord); err != nil {
return err
}
return b.Shoot.Components.Extensions.ExternalDNSRecord.Wait(ctx)
}
// deployInternalDNSRecord deploys or restores the internal DNSRecord and waits for the operation to complete.
func (b *Botanist) deployInternalDNSRecord(ctx context.Context) error {
if err := b.deployOrRestoreDNSRecord(ctx, b.Shoot.Components.Extensions.InternalDNSRecord); err != nil {
return err
}
return b.Shoot.Components.Extensions.InternalDNSRecord.Wait(ctx)
}
// DeployOwnerDNSRecord deploys or restores the owner DNSRecord and waits for the operation to complete.
func (b *Botanist) DeployOwnerDNSRecord(ctx context.Context) error {
if err := b.deployOrRestoreDNSRecord(ctx, b.Shoot.Components.Extensions.OwnerDNSRecord); err != nil {
return err
}
return b.Shoot.Components.Extensions.OwnerDNSRecord.Wait(ctx)
}
// DestroyExternalDNSRecord destroys the external DNSRecord and waits for the operation to complete.
func (b *Botanist) DestroyExternalDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.ExternalDNSRecord.Destroy(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.ExternalDNSRecord.WaitCleanup(ctx)
}
// DestroyInternalDNSRecord destroys the internal DNSRecord and waits for the operation to complete.
func (b *Botanist) DestroyInternalDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.InternalDNSRecord.Destroy(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.InternalDNSRecord.WaitCleanup(ctx)
}
// DestroyOwnerDNSRecord destroys the owner DNSRecord and waits for the operation to complete.
func (b *Botanist) DestroyOwnerDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.OwnerDNSRecord.Destroy(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.OwnerDNSRecord.WaitCleanup(ctx)
}
// MigrateExternalDNSRecord migrates the external DNSRecord and waits for the operation to complete.
func (b *Botanist) MigrateExternalDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.ExternalDNSRecord.Migrate(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.ExternalDNSRecord.WaitMigrate(ctx)
}
// MigrateInternalDNSRecord migrates the internal DNSRecord and waits for the operation to complete.
func (b *Botanist) MigrateInternalDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.InternalDNSRecord.Migrate(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.InternalDNSRecord.WaitMigrate(ctx)
}
// MigrateOwnerDNSRecord migrates the owner DNSRecord and waits for the operation to complete.
func (b *Botanist) MigrateOwnerDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.OwnerDNSRecord.Migrate(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.OwnerDNSRecord.WaitMigrate(ctx)
}
func (b *Botanist) deployOrRestoreDNSRecord(ctx context.Context, dnsRecord component.DeployMigrateWaiter) error {
if b.isRestorePhase() {
return dnsRecord.Restore(ctx, b.GetShootState())
}
return dnsRecord.Deploy(ctx)
}
// CleanupOrphanedDNSRecordSecrets cleans up secrets related to DNSRecords which may be orphaned after introducing the 'dnsrecord-' prefix
func (b *Botanist) CleanupOrphanedDNSRecordSecrets(ctx context.Context) error {
// TODO (voelzmo): remove this when all DNSRecord secrets have migrated to a prefixed version
var err error
shootName := b.Shoot.GetInfo().Name
if shootName != "gardener" {
err = b.SeedClientSet.Client().Delete(ctx, &corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: shootName + "-" + v1beta1constants.DNSRecordInternalName, Namespace: b.Shoot.SeedNamespace}})
if client.IgnoreNotFound(err) != nil {
return fmt.Errorf("could not clean up orphaned internal DNSRecord secret: %w", err)
}
}
err = b.SeedClientSet.Client().Delete(ctx, &corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: shootName + "-" + v1beta1constants.DNSRecordExternalName, Namespace: b.Shoot.SeedNamespace}})
if client.IgnoreNotFound(err) != nil {
return fmt.Errorf("could not clean up orphaned external DNSRecord secret: %w", err)
}
return nil
}