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botanist.go
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botanist.go
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// Copyright (c) 2018 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"
"sort"
"strings"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/operation"
"github.com/gardener/gardener/pkg/operation/common"
dnsv1alpha1 "github.com/gardener/external-dns-management/pkg/apis/dns/v1alpha1"
"k8s.io/apimachinery/pkg/util/sets"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// New takes an operation object <o> and creates a new Botanist object. It checks whether the given Shoot DNS
// domain is covered by a default domain, and if so, it sets the <DefaultDomainSecret> attribute on the Botanist
// object.
func New(o *operation.Operation) (*Botanist, error) {
b := &Botanist{
Operation: o,
}
// Determine all default domain secrets and check whether the used Shoot domain matches a default domain.
if o.Shoot != nil && o.Shoot.Info.Spec.DNS != nil && o.Shoot.Info.Spec.DNS.Domain != nil {
var (
prefix = fmt.Sprintf("%s-", common.GardenRoleDefaultDomain)
defaultDomainKeys = o.GetSecretKeysOfRole(common.GardenRoleDefaultDomain)
)
sort.Slice(defaultDomainKeys, func(i, j int) bool { return len(defaultDomainKeys[i]) >= len(defaultDomainKeys[j]) })
for _, key := range defaultDomainKeys {
defaultDomain := strings.SplitAfter(key, prefix)[1]
if strings.HasSuffix(*(o.Shoot.Info.Spec.DNS.Domain), defaultDomain) {
b.DefaultDomainSecret = b.Secrets[prefix+defaultDomain]
break
}
}
}
if err := b.InitializeSeedClients(); err != nil {
return nil, err
}
return b, nil
}
// RequiredExtensionsExist checks whether all required extensions needed for an shoot operation exist.
func (b *Botanist) RequiredExtensionsExist() error {
controllerInstallationList := &gardencorev1beta1.ControllerInstallationList{}
if err := b.K8sGardenClient.Client().List(context.TODO(), controllerInstallationList); err != nil {
return err
}
requiredExtensions := b.computeRequiredExtensions()
for _, controllerInstallation := range controllerInstallationList.Items {
if controllerInstallation.Spec.SeedRef.Name != b.Seed.Info.Name {
continue
}
controllerRegistration := &gardencorev1beta1.ControllerRegistration{}
if err := b.K8sGardenClient.Client().Get(context.TODO(), client.ObjectKey{Name: controllerInstallation.Spec.RegistrationRef.Name}, controllerRegistration); err != nil {
return err
}
for extensionKind, extensionTypes := range requiredExtensions {
for extensionType := range extensionTypes {
if helper.IsResourceSupported(controllerRegistration.Spec.Resources, extensionKind, extensionType) && helper.IsControllerInstallationSuccessful(controllerInstallation) {
extensionTypes.Delete(extensionType)
}
}
if extensionTypes.Len() == 0 {
delete(requiredExtensions, extensionKind)
}
}
}
if len(requiredExtensions) > 0 {
return fmt.Errorf("extension controllers missing or unready: %+v", requiredExtensions)
}
return nil
}
func (b *Botanist) computeRequiredExtensions() map[string]sets.String {
requiredExtensions := make(map[string]sets.String)
machineImagesSet := sets.NewString()
for _, worker := range b.Shoot.Info.Spec.Provider.Workers {
if worker.Machine.Image != nil {
machineImagesSet.Insert(string(worker.Machine.Image.Name))
}
}
requiredExtensions[extensionsv1alpha1.OperatingSystemConfigResource] = machineImagesSet
if !helper.TaintsHave(b.Seed.Info.Spec.Taints, gardencorev1beta1.SeedTaintDisableDNS) {
if b.Garden.InternalDomain.Provider != "unmanaged" {
if requiredExtensions[dnsv1alpha1.DNSProviderKind] == nil {
requiredExtensions[dnsv1alpha1.DNSProviderKind] = sets.NewString()
}
requiredExtensions[dnsv1alpha1.DNSProviderKind].Insert(b.Garden.InternalDomain.Provider)
}
if b.Shoot.ExternalDomain != nil && b.Shoot.ExternalDomain.Provider != "unmanaged" {
if requiredExtensions[dnsv1alpha1.DNSProviderKind] == nil {
requiredExtensions[dnsv1alpha1.DNSProviderKind] = sets.NewString()
}
requiredExtensions[dnsv1alpha1.DNSProviderKind].Insert(b.Shoot.ExternalDomain.Provider)
}
}
for extensionType := range b.Shoot.Extensions {
if requiredExtensions[extensionsv1alpha1.ExtensionResource] == nil {
requiredExtensions[extensionsv1alpha1.ExtensionResource] = sets.NewString()
}
requiredExtensions[extensionsv1alpha1.ExtensionResource].Insert(extensionType)
}
requiredExtensions[extensionsv1alpha1.InfrastructureResource] = sets.NewString(string(b.Shoot.Info.Spec.Provider.Type))
requiredExtensions[extensionsv1alpha1.ControlPlaneResource] = sets.NewString(string(b.Shoot.Info.Spec.Provider.Type))
requiredExtensions[extensionsv1alpha1.NetworkResource] = sets.NewString(b.Shoot.Info.Spec.Networking.Type)
requiredExtensions[extensionsv1alpha1.WorkerResource] = sets.NewString(string(b.Shoot.Info.Spec.Provider.Type))
if b.Seed.Info.Spec.Backup != nil {
requiredExtensions[extensionsv1alpha1.BackupBucketResource] = sets.NewString(string(b.Seed.Info.Spec.Backup.Provider))
requiredExtensions[extensionsv1alpha1.BackupEntryResource] = sets.NewString(string(b.Seed.Info.Spec.Backup.Provider))
}
return requiredExtensions
}