/
secrets.go
192 lines (160 loc) · 5.75 KB
/
secrets.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package controllers
import (
"context"
"fmt"
"github.com/talos-systems/crypto/x509"
"github.com/talos-systems/talos/pkg/machinery/config/types/v1alpha1/generate"
"gopkg.in/yaml.v2"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
capiv1 "sigs.k8s.io/cluster-api/api/v1alpha3"
"sigs.k8s.io/controller-runtime/pkg/client"
bootstrapv1alpha3 "github.com/talos-systems/cluster-api-bootstrap-provider-talos/api/v1alpha3"
)
func (r *TalosConfigReconciler) fetchSecret(ctx context.Context, config *bootstrapv1alpha3.TalosConfig, secretName string) (*corev1.Secret, error) {
retSecret := &corev1.Secret{}
err := r.Client.Get(context.Background(), client.ObjectKey{
Namespace: config.GetNamespace(),
Name: secretName,
}, retSecret)
if err != nil {
return nil, err
}
return retSecret, nil
}
// getSecretsBundle either generates or loads existing secret.
func (r *TalosConfigReconciler) getSecretsBundle(ctx context.Context, scope *TalosConfigScope, secretName string, opts ...generate.GenOption) (*generate.SecretsBundle, error) {
var secretsBundle *generate.SecretsBundle
retry:
secret, err := r.fetchSecret(ctx, scope.Config, secretName)
switch {
case err != nil && k8serrors.IsNotFound(err):
// no cluster secret yet, generate new one
secretsBundle, err = generate.NewSecretsBundle(generate.NewClock(), opts...)
if err != nil {
return nil, fmt.Errorf("error generating new secrets bundle: %w", err)
}
if err = r.writeSecretsBundleSecret(ctx, scope, secretName, secretsBundle); err != nil {
if k8serrors.IsAlreadyExists(err) {
// conflict on creation, retry loading
goto retry
}
return nil, fmt.Errorf("error writing secrets bundle: %w", err)
}
case err != nil:
return nil, fmt.Errorf("error reading secrets bundle: %w", err)
default:
// successfully loaded secret, initialize secretsBundle from it
secretsBundle = &generate.SecretsBundle{
Clock: generate.NewClock(),
}
if _, ok := secret.Data["bundle"]; ok {
// new format
if err = yaml.Unmarshal(secret.Data["bundle"], secretsBundle); err != nil {
return nil, fmt.Errorf("error unmarshaling secrets bundle: %w", err)
}
} else {
// legacy format
if err = yaml.Unmarshal(secret.Data["certs"], &secretsBundle.Certs); err != nil {
return nil, fmt.Errorf("error unmarshaling certs: %w", err)
}
if err = yaml.Unmarshal(secret.Data["kubeSecrets"], &secretsBundle.Secrets); err != nil {
return nil, fmt.Errorf("error unmarshaling secrets: %w", err)
}
if err = yaml.Unmarshal(secret.Data["trustdInfo"], &secretsBundle.TrustdInfo); err != nil {
return nil, fmt.Errorf("error unmarshaling trustd info: %w", err)
}
// not stored in legacy format, use empty values
secretsBundle.Cluster = &generate.Cluster{}
}
}
return secretsBundle, nil
}
func (r *TalosConfigReconciler) writeSecretsBundleSecret(ctx context.Context, scope *TalosConfigScope, secretName string, secretsBundle *generate.SecretsBundle) error {
bundle, err := yaml.Marshal(secretsBundle)
if err != nil {
return fmt.Errorf("error marshaling secrets bundle: %w", err)
}
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Namespace: scope.Config.Namespace,
Name: secretName,
Labels: map[string]string{
capiv1.ClusterLabelName: scope.Cluster.Name,
},
OwnerReferences: []metav1.OwnerReference{
*metav1.NewControllerRef(scope.Cluster, capiv1.GroupVersion.WithKind("Cluster")),
},
},
Data: map[string][]byte{
"bundle": bundle,
},
}
return r.Client.Create(ctx, secret)
}
func (r *TalosConfigReconciler) writeK8sCASecret(ctx context.Context, scope *TalosConfigScope, certs *x509.PEMEncodedCertificateAndKey) error {
// Create ca secret only if it doesn't already exist
_, err := r.fetchSecret(ctx, scope.Config, scope.Cluster.Name+"-ca")
if err == nil {
return nil
}
if !k8serrors.IsNotFound(err) {
return err
}
certSecret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Namespace: scope.Config.Namespace,
Name: scope.Cluster.Name + "-ca",
Labels: map[string]string{
capiv1.ClusterLabelName: scope.Cluster.Name,
},
OwnerReferences: []metav1.OwnerReference{
*metav1.NewControllerRef(scope.Cluster, capiv1.GroupVersion.WithKind("Cluster")),
},
},
Data: map[string][]byte{
"tls.crt": certs.Crt,
"tls.key": certs.Key,
},
}
err = r.Client.Create(ctx, certSecret)
if err != nil && !k8serrors.IsAlreadyExists(err) {
return err
}
return nil
}
// writeBootstrapData creates a new secret with the data passed in as input
func (r *TalosConfigReconciler) writeBootstrapData(ctx context.Context, scope *TalosConfigScope, data []byte) (string, error) {
// Create bootstrap secret only if it doesn't already exist
ownerName := scope.ConfigOwner.GetName()
dataSecretName := ownerName + "-bootstrap-data"
r.Log.Info("handling bootstrap data for ", "owner", ownerName)
_, err := r.fetchSecret(ctx, scope.Config, dataSecretName)
if err == nil {
return dataSecretName, nil
}
if err != nil && !k8serrors.IsNotFound(err) {
return dataSecretName, err
}
certSecret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Namespace: scope.Config.Namespace,
Name: dataSecretName,
Labels: map[string]string{
capiv1.ClusterLabelName: scope.Cluster.Name,
},
OwnerReferences: []metav1.OwnerReference{
*metav1.NewControllerRef(scope.Config, bootstrapv1alpha3.GroupVersion.WithKind("TalosConfig")),
},
},
Data: map[string][]byte{
"value": data,
},
}
err = r.Client.Create(ctx, certSecret)
return dataSecretName, err
}