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flow_etcd_encryption.go
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flow_etcd_encryption.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 controller
import (
"context"
"fmt"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/operation/etcdencryption"
apiserverconfigv1 "k8s.io/apiserver/pkg/apis/config/v1"
)
// GenerateEncryptionConfiguration generates a missing etcd encryption configuration for the Gardener API server
func (o *operation) GenerateEncryptionConfiguration(ctx context.Context) error {
if o.imports.GardenerAPIServer.ComponentConfiguration.Encryption == nil {
config, err := generateEncryptionConfiguration()
if err != nil {
return fmt.Errorf("failed to generate encryption configuration for Gardener API server: %w", err)
}
o.log.Infof("Successfully generated new etcd encryption configuration for the Gardener API Server")
o.imports.GardenerAPIServer.ComponentConfiguration.Encryption = config
}
return nil
}
func generateEncryptionConfiguration() (*apiserverconfigv1.EncryptionConfiguration, error) {
config := &etcdencryption.EncryptionConfig{}
if err := config.AddNewEncryptionKey(); err != nil {
return nil, err
}
encryptionConfiguration := etcdencryption.NewEncryptionConfiguration(config)
// add virtual garden specific resources
// this is a safe slice access, as we know that there must be one resource configuration
encryptionConfiguration.Resources[0].Resources = append(encryptionConfiguration.Resources[0].Resources,
fmt.Sprintf("controllerdeployments.%s", gardencorev1beta1.GroupName),
fmt.Sprintf("controllerregistrations.%s", gardencorev1beta1.GroupName),
fmt.Sprintf("shootstates.%s", gardencorev1beta1.GroupName),
)
return encryptionConfiguration, nil
}