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flow_update_secret_references.go
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flow_update_secret_references.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"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// UpdateSecretReferences updates supplied secret references with used certificates.
// This is only relevant for certificate rotation, where the secret-supplied certificate had to be rotated and
// therefore needs to be updated in the source secret.
// At this point in the reconciliation flow, we know all CA and TLS certificates must be set.
func (o *operation) UpdateSecretReferences(ctx context.Context) error {
// Gardener API Server CA
if o.imports.GardenerAPIServer.ComponentConfiguration.CA.SecretRef != nil {
s := &corev1.Secret{ObjectMeta: metav1.ObjectMeta{
Name: o.imports.GardenerAPIServer.ComponentConfiguration.CA.SecretRef.Name,
Namespace: o.imports.GardenerAPIServer.ComponentConfiguration.CA.SecretRef.Namespace,
}}
s.Data = map[string][]byte{
secretDataKeyCACrt: []byte(*o.imports.GardenerAPIServer.ComponentConfiguration.CA.Crt),
}
if o.imports.GardenerAPIServer.ComponentConfiguration.CA.Key != nil {
s.Data[secretDataKeyCAKey] = []byte(*o.imports.GardenerAPIServer.ComponentConfiguration.CA.Key)
}
if err := o.runtimeClient.Client().Patch(ctx, s, client.MergeFrom(s)); err != nil {
return fmt.Errorf("failed to update secret reference in the runtime cluster (%s/%s) for the Gardener API Server CA", o.imports.GardenerAPIServer.ComponentConfiguration.CA.SecretRef.Namespace, o.imports.GardenerAPIServer.ComponentConfiguration.CA.SecretRef.Name)
}
}
// Gardener Admission Controller CA
if o.imports.GardenerAdmissionController.Enabled && o.imports.GardenerAdmissionController.ComponentConfiguration.CA.SecretRef != nil {
s := &corev1.Secret{ObjectMeta: metav1.ObjectMeta{
Name: o.imports.GardenerAdmissionController.ComponentConfiguration.CA.SecretRef.Name,
Namespace: o.imports.GardenerAdmissionController.ComponentConfiguration.CA.SecretRef.Namespace,
}}
s.Data = map[string][]byte{
secretDataKeyCACrt: []byte(*o.imports.GardenerAdmissionController.ComponentConfiguration.CA.Crt),
}
if o.imports.GardenerAdmissionController.ComponentConfiguration.CA.Key != nil {
s.Data[secretDataKeyCAKey] = []byte(*o.imports.GardenerAdmissionController.ComponentConfiguration.CA.Key)
}
if err := o.runtimeClient.Client().Patch(ctx, s, client.MergeFrom(s)); err != nil {
return fmt.Errorf("failed to update secret reference in the runtime cluster (%s/%s) for the Gardener Admission Controller CA", o.imports.GardenerAdmissionController.ComponentConfiguration.CA.SecretRef.Namespace, o.imports.GardenerAdmissionController.ComponentConfiguration.CA.SecretRef.Name)
}
}
// TLS certificates
if o.imports.GardenerAPIServer.ComponentConfiguration.TLS.SecretRef != nil {
s := &corev1.Secret{ObjectMeta: metav1.ObjectMeta{
Name: o.imports.GardenerAPIServer.ComponentConfiguration.TLS.SecretRef.Name,
Namespace: o.imports.GardenerAPIServer.ComponentConfiguration.TLS.SecretRef.Namespace,
}}
s.Data = map[string][]byte{
secretDataKeyTLSCrt: []byte(*o.imports.GardenerAPIServer.ComponentConfiguration.TLS.Crt),
secretDataKeyTLSKey: []byte(*o.imports.GardenerAPIServer.ComponentConfiguration.TLS.Key),
}
if err := o.runtimeClient.Client().Patch(ctx, s, client.MergeFrom(s)); err != nil {
return fmt.Errorf("failed to update the secret reference in the runtime cluster (%s/%s) containing the TLS certificate for the Gardener API Server", o.imports.GardenerAPIServer.ComponentConfiguration.TLS.SecretRef.Namespace, o.imports.GardenerAPIServer.ComponentConfiguration.TLS.SecretRef.Name)
}
}
if o.imports.GardenerControllerManager.ComponentConfiguration.TLS.SecretRef != nil {
s := &corev1.Secret{ObjectMeta: metav1.ObjectMeta{
Name: o.imports.GardenerControllerManager.ComponentConfiguration.TLS.SecretRef.Name,
Namespace: o.imports.GardenerControllerManager.ComponentConfiguration.TLS.SecretRef.Namespace,
}}
s.Data = map[string][]byte{
secretDataKeyTLSCrt: []byte(*o.imports.GardenerControllerManager.ComponentConfiguration.TLS.Crt),
secretDataKeyTLSKey: []byte(*o.imports.GardenerControllerManager.ComponentConfiguration.TLS.Key),
}
if err := o.runtimeClient.Client().Patch(ctx, s, client.MergeFrom(s)); err != nil {
return fmt.Errorf("failed to update the secret reference in the runtime cluster (%s/%s) containing the TLS certificate for the Gardener Controller Manager", o.imports.GardenerControllerManager.ComponentConfiguration.TLS.SecretRef.Namespace, o.imports.GardenerControllerManager.ComponentConfiguration.TLS.SecretRef.Name)
}
}
if o.imports.GardenerAdmissionController.Enabled && o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.SecretRef != nil {
s := &corev1.Secret{ObjectMeta: metav1.ObjectMeta{
Name: o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.SecretRef.Name,
Namespace: o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.SecretRef.Namespace,
}}
s.Data = map[string][]byte{
secretDataKeyTLSCrt: []byte(*o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.Crt),
secretDataKeyTLSKey: []byte(*o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.Key),
}
if err := o.runtimeClient.Client().Patch(ctx, s, client.MergeFrom(s)); err != nil {
return fmt.Errorf("failed to update the secret reference in the runtime cluster (%s/%s) containing the TLS certificate for the Gardener Admission Controller", o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.SecretRef.Namespace, o.imports.GardenerAdmissionController.ComponentConfiguration.TLS.SecretRef.Name)
}
}
return nil
}