/
dogu_registrator.go
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/
dogu_registrator.go
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package cesregistry
import (
"context"
"errors"
"fmt"
"github.com/cloudogu/k8s-dogu-operator/internal/cloudogu"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/log"
"github.com/cloudogu/cesapp-lib/core"
"github.com/cloudogu/cesapp-lib/keys"
cesregistry "github.com/cloudogu/cesapp-lib/registry"
k8sv1 "github.com/cloudogu/k8s-dogu-operator/api/v1"
"github.com/cloudogu/k8s-dogu-operator/controllers/resource"
)
// CesDoguRegistrator is responsible for register dogus in the cluster
type CesDoguRegistrator struct {
client client.Client
registry cesregistry.Registry
doguRegistry cesregistry.DoguRegistry
secretGenerator cloudogu.SecretResourceGenerator
}
// NewCESDoguRegistrator creates a new instance of the dogu registrator. It registers dogus in the dogu registry and
// generates keypairs
func NewCESDoguRegistrator(client client.Client, registry cesregistry.Registry, secretGenerator cloudogu.SecretResourceGenerator) *CesDoguRegistrator {
return &CesDoguRegistrator{
client: client,
registry: registry,
doguRegistry: registry.DoguRegistry(),
secretGenerator: secretGenerator,
}
}
// RegisterNewDogu registers a completely new dogu in a cluster. Use RegisterDoguVersion() for upgrades of an existing
// dogu.
func (c *CesDoguRegistrator) RegisterNewDogu(ctx context.Context, doguResource *k8sv1.Dogu, dogu *core.Dogu) error {
logger := log.FromContext(ctx)
enabled, err := c.doguRegistry.IsEnabled(dogu.GetSimpleName())
if err != nil {
return fmt.Errorf("failed to check if dogu is already installed and enabled: %w", err)
}
if enabled {
logger.Info("Skipping dogu registration because it is already installed and enabled in the dogu registry")
return nil
}
err = c.registerDoguInRegistry(dogu)
if err != nil {
return err
}
err = c.registerNewKeys(ctx, doguResource, dogu)
if err != nil {
return fmt.Errorf("failed to register keys: %w", err)
}
return c.enableDoguInRegistry(dogu)
}
// RegisterDoguVersion registers an upgrade of an existing dogu in a cluster. Use RegisterNewDogu() to complete new
// dogu installations.
func (c *CesDoguRegistrator) RegisterDoguVersion(dogu *core.Dogu) error {
enabled, err := c.doguRegistry.IsEnabled(dogu.GetSimpleName())
if err != nil {
return fmt.Errorf("failed to check if dogu is already installed and enabled: %w", err)
}
if !enabled {
return errors.New("could not register dogu version: previous version not found")
}
err = c.registerDoguInRegistry(dogu)
if err != nil {
return err
}
return c.enableDoguInRegistry(dogu)
}
// UnregisterDogu deletes a dogu from the dogu registry
func (c *CesDoguRegistrator) UnregisterDogu(dogu string) error {
err := c.registry.DoguConfig(dogu).RemoveAll()
if err != nil && !cesregistry.IsKeyNotFoundError(err) {
return fmt.Errorf("failed to remove dogu config: %w", err)
}
err = c.doguRegistry.Unregister(dogu)
if err != nil && !cesregistry.IsKeyNotFoundError(err) {
return fmt.Errorf("failed to unregister dogu %s: %w", dogu, err)
}
return nil
}
func (c *CesDoguRegistrator) enableDoguInRegistry(dogu *core.Dogu) error {
err := c.doguRegistry.Enable(dogu)
if err != nil {
return fmt.Errorf("failed to enable dogu: %w", err)
}
return nil
}
func (c *CesDoguRegistrator) registerDoguInRegistry(dogu *core.Dogu) error {
err := c.doguRegistry.Register(dogu)
if err != nil {
return fmt.Errorf("failed to register dogu %s: %w", dogu.GetSimpleName(), err)
}
return nil
}
// registerNewKeys creates a new key pair and registers it with the dogu in the registry. If the private key exists it
// will be used to generate a new public key.
func (c *CesDoguRegistrator) registerNewKeys(ctx context.Context, doguResource *k8sv1.Dogu, dogu *core.Dogu) error {
keyProvider, err := resource.GetKeyProvider(c.registry)
if err != nil {
return err
}
secret, err := doguResource.GetPrivateKeySecret(ctx, c.client)
if err != nil && !apierrors.IsNotFound(err) {
return err
}
if apierrors.IsNotFound(err) {
return c.createKeyPair(ctx, doguResource, dogu, keyProvider)
}
return c.recreatePubKey(secret, keyProvider, dogu)
}
func (c *CesDoguRegistrator) recreatePubKey(secret *corev1.Secret, keyProvider *keys.KeyProvider, dogu *core.Dogu) error {
existingPrivateKey := secret.Data["private.pem"]
keyPair, err := keyProvider.FromPrivateKey(existingPrivateKey)
if err != nil {
return fmt.Errorf("failed to create keypair from existing private key: %w", err)
}
err = c.writePublicKey(keyPair.Public(), dogu)
if err != nil {
return fmt.Errorf("failed to write public key from existing private key: %w", err)
}
return nil
}
func (c *CesDoguRegistrator) createKeyPair(ctx context.Context, doguResource *k8sv1.Dogu, dogu *core.Dogu, keyProvider *keys.KeyProvider) error {
keyPair, err := keyProvider.Generate()
if err != nil {
return fmt.Errorf("failed to generate key pair: %w", err)
}
return c.writeKeyPair(ctx, doguResource, dogu, keyPair)
}
func (c *CesDoguRegistrator) writeKeyPair(ctx context.Context, doguResource *k8sv1.Dogu, dogu *core.Dogu, keyPair *keys.KeyPair) error {
err := c.writePrivateKey(ctx, keyPair.Private(), doguResource)
if err != nil {
return fmt.Errorf("failed to write private key: %w", err)
}
err = c.writePublicKey(keyPair.Public(), dogu)
if err != nil {
return fmt.Errorf("failed to write public key: %w", err)
}
return nil
}
func (c *CesDoguRegistrator) writePrivateKey(ctx context.Context, privateKey *keys.PrivateKey, doguResource *k8sv1.Dogu) error {
logger := log.FromContext(ctx)
secretString, err := privateKey.AsString()
if err != nil {
return fmt.Errorf("failed to get private key as string: %w", err)
}
secret, err := c.secretGenerator.CreateDoguSecret(doguResource, map[string]string{"private.pem": secretString})
if err != nil {
return fmt.Errorf("failed to generate secret: %w", err)
}
err = c.client.Create(ctx, secret)
if err != nil {
return fmt.Errorf("failed to create secret: %w", err)
}
logger.Info(fmt.Sprintf("Secret %s/%s has been : %s", secret.Namespace, secret.Name, controllerutil.OperationResultCreated))
return nil
}
func (c *CesDoguRegistrator) writePublicKey(publicKey *keys.PublicKey, dogu *core.Dogu) error {
public, err := publicKey.AsString()
if err != nil {
return fmt.Errorf("failed to get public key as string: %w", err)
}
err = c.registry.DoguConfig(dogu.GetSimpleName()).Set(cesregistry.KeyDoguPublicKey, public)
if err != nil {
return fmt.Errorf("failed to write to registry: %w", err)
}
return nil
}