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eventmesh.go
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eventmesh.go
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package eventmesh
import (
"context"
"fmt"
"strings"
"time"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/cleaner"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/metrics"
apigatewayv1beta1 "github.com/kyma-project/api-gateway/apis/gateway/v1beta1"
eventingv1alpha2 "github.com/kyma-project/kyma/components/eventing-controller/api/v1alpha2"
"github.com/pkg/errors"
"go.uber.org/zap"
"golang.org/x/xerrors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/dynamic"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/manager"
eventingv1alpha1 "github.com/kyma-project/kyma/components/eventing-controller/api/v1alpha1"
"github.com/kyma-project/kyma/components/eventing-controller/controllers/subscription/eventmesh"
"github.com/kyma-project/kyma/components/eventing-controller/logger"
backendeventmesh "github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/eventmesh"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/eventtype"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/sink"
backendutils "github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/utils"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/env"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/subscriptionmanager"
)
const (
subscriptionManagerName = "beb-subscription-manager"
)
// AddToScheme adds the own schemes to the runtime scheme.
func AddToScheme(scheme *runtime.Scheme) error {
if err := clientgoscheme.AddToScheme(scheme); err != nil {
return err
}
if err := eventingv1alpha1.AddToScheme(scheme); err != nil {
return err
}
if err := apigatewayv1beta1.AddToScheme(scheme); err != nil {
return err
}
return nil
}
// AddV1Alpha2ToScheme adds v1alpha2 scheme into the given scheme.
func AddV1Alpha2ToScheme(scheme *runtime.Scheme) error {
if err := eventingv1alpha2.AddToScheme(scheme); err != nil {
return err
}
return nil
}
// SubscriptionManager implements the subscriptionmanager.Manager interface.
type SubscriptionManager struct {
cancel context.CancelFunc
envCfg env.Config
restCfg *rest.Config
metricsAddr string
resyncPeriod time.Duration
mgr manager.Manager
eventMeshBackend backendeventmesh.Backend
logger *logger.Logger
collector *metrics.Collector
}
// NewSubscriptionManager creates the SubscriptionManager for BEB and initializes it as far as it
// does not depend on non-common options.
func NewSubscriptionManager(restCfg *rest.Config, metricsAddr string, resyncPeriod time.Duration, logger *logger.Logger,
collector *metrics.Collector) *SubscriptionManager {
return &SubscriptionManager{
envCfg: env.GetConfig(),
restCfg: restCfg,
metricsAddr: metricsAddr,
resyncPeriod: resyncPeriod,
logger: logger,
collector: collector,
}
}
// Init implements the subscriptionmanager.Manager interface.
func (c *SubscriptionManager) Init(mgr manager.Manager) error {
if len(c.envCfg.Domain) == 0 {
return fmt.Errorf("env var DOMAIN must be a non-empty value")
}
c.mgr = mgr
return nil
}
// Start implements the subscriptionmanager.Manager interface and starts the manager.
func (c *SubscriptionManager) Start(_ env.DefaultSubscriptionConfig, params subscriptionmanager.Params) error {
c.collector.ResetSubscriptionStatus()
ctx, cancel := context.WithCancel(context.Background())
c.cancel = cancel
oauth2credential, err := getOAuth2ClientCredentials(params)
if err != nil {
return errors.Wrap(err, "get oauth2client credentials failed")
}
// Need to read env to read BEB related secrets
c.envCfg = env.GetConfig()
nameMapper := backendutils.NewBEBSubscriptionNameMapper(strings.TrimSpace(c.envCfg.Domain),
backendeventmesh.MaxSubscriptionNameLength)
ctrl.Log.WithName("BEB-subscription-manager").Info("using BEB name mapper",
"domainName", c.envCfg.Domain,
"maxNameLength", backendeventmesh.MaxSubscriptionNameLength)
client := c.mgr.GetClient()
recorder := c.mgr.GetEventRecorderFor("eventing-controller-beb")
// Initialize v1alpha1 event type cleaner for conversion webhook
simpleCleaner := eventtype.NewSimpleCleaner(c.envCfg.EventTypePrefix, c.logger)
eventingv1alpha1.InitializeEventTypeCleaner(simpleCleaner)
// Initialize v1alpha2 handler for EventMesh
eventMeshHandler := backendeventmesh.NewEventMesh(oauth2credential, nameMapper, c.logger)
eventMeshcleaner := cleaner.NewEventMeshCleaner(c.logger)
eventMeshReconciler := eventmesh.NewReconciler(
ctx,
client,
c.logger,
recorder,
c.envCfg,
eventMeshcleaner,
eventMeshHandler,
oauth2credential,
nameMapper,
sink.NewValidator(ctx, client, recorder),
c.collector,
)
c.eventMeshBackend = eventMeshReconciler.Backend
if err := eventMeshReconciler.SetupUnmanaged(c.mgr); err != nil {
return xerrors.Errorf("setup EventMesh subscription controller failed: %v", err)
}
c.namedLogger().Info("Started v1alpha2 EventMesh subscription manager")
return nil
}
// Stop implements the subscriptionmanager.Manager interface and stops the EventMesh subscription manager.
// If runCleanup is false, it will only mark the subscriptions as not ready. If it is true, it will
// clean up subscriptions on EventMesh.
func (c *SubscriptionManager) Stop(runCleanup bool) error {
if c.cancel != nil {
c.cancel()
}
return c.stopEventMeshBackend(runCleanup)
}
// stopEventMeshBackend stops and cleans all EventMesh backend (based on Subscription v1alpha2).
func (c *SubscriptionManager) stopEventMeshBackend(runCleanup bool) error {
dynamicClient := dynamic.NewForConfigOrDie(c.restCfg)
if !runCleanup {
return markAllV1Alpha2SubscriptionsAsNotReady(dynamicClient, c.namedLogger())
}
return cleanupEventMesh(c.eventMeshBackend, dynamicClient, c.namedLogger())
}
func markAllV1Alpha2SubscriptionsAsNotReady(dynamicClient dynamic.Interface, logger *zap.SugaredLogger) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Fetch all subscriptions.
subscriptionsUnstructured, err := dynamicClient.Resource(eventingv1alpha2.SubscriptionGroupVersionResource()).Namespace(corev1.NamespaceAll).List(ctx, metav1.ListOptions{})
if err != nil {
return errors.Wrapf(err, "list subscriptions failed")
}
subs, err := eventingv1alpha2.ConvertUnstructListToSubList(subscriptionsUnstructured)
if err != nil {
return errors.Wrapf(err, "convert subscriptionList from unstructured list failed")
}
// Mark all as not ready
for _, sub := range subs.Items {
if !sub.Status.Ready {
continue
}
desiredSub := sub.DuplicateWithStatusDefaults()
desiredSub.Status.Ready = false
desiredSub.Status.Backend.CopyHashes(sub.Status.Backend)
if err = backendutils.UpdateSubscriptionStatus(ctx, dynamicClient, desiredSub); err != nil {
logger.Errorw("Failed to update subscription status", "namespace", sub.Namespace, "name", sub.Name, "error", err)
}
}
return err
}
// cleanupEventMesh removes all created EventMesh artifacts (based on Subscription v1alpha2).
func cleanupEventMesh(backend backendeventmesh.Backend, dynamicClient dynamic.Interface, logger *zap.SugaredLogger) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var eventMeshBackend *backendeventmesh.EventMesh
var ok bool
if eventMeshBackend, ok = backend.(*backendeventmesh.EventMesh); !ok {
return xerrors.Errorf("no EventMesh backend exists: convert backend handler to EventMesh handler failed")
}
// Fetch all subscriptions.
subscriptionsUnstructured, err := dynamicClient.Resource(eventingv1alpha2.SubscriptionGroupVersionResource()).Namespace(corev1.NamespaceAll).List(ctx, metav1.ListOptions{})
if err != nil {
return errors.Wrapf(err, "list subscriptions failed")
}
subs, err := eventingv1alpha2.ConvertUnstructListToSubList(subscriptionsUnstructured)
if err != nil {
return errors.Wrapf(err, "convert subscriptionList from unstructured list failed")
}
// Clean APIRules.
isCleanupSuccessful := true
for _, v := range subs.Items {
sub := v
if apiRule := sub.Status.Backend.APIRuleName; apiRule != "" {
if err := dynamicClient.Resource(backendutils.APIRuleGroupVersionResource()).Namespace(sub.Namespace).
Delete(ctx, apiRule, metav1.DeleteOptions{}); err != nil {
isCleanupSuccessful = false
logger.Errorw("Failed to delete APIRule", "namespace", sub.Namespace, "name", apiRule, "error", err)
}
}
// Clean statuses.
desiredSub := sub.DuplicateWithStatusDefaults()
if err := backendutils.UpdateSubscriptionStatus(ctx, dynamicClient, desiredSub); err != nil {
isCleanupSuccessful = false
logger.Errorw("Failed to update EventMesh subscription status", "namespace", sub.Namespace, "name", sub.Name, "error", err)
}
// Clean subscriptions from EventMesh.
if eventMeshBackend != nil {
if err := eventMeshBackend.DeleteSubscription(&sub); err != nil {
isCleanupSuccessful = false
logger.Errorw("Failed to delete EventMesh subscription", "namespace", sub.Namespace, "name", sub.Name, "error", err)
}
}
}
logger.Debugw("Finished cleanup process", "success", isCleanupSuccessful)
return nil
}
func getOAuth2ClientCredentials(params subscriptionmanager.Params) (*backendeventmesh.OAuth2ClientCredentials, error) {
val := params[subscriptionmanager.ParamNameClientID]
id, ok := val.([]byte)
if !ok {
return nil, fmt.Errorf("expected []byte value for %s", subscriptionmanager.ParamNameClientID)
}
val = params[subscriptionmanager.ParamNameClientSecret]
secret, ok := val.([]byte)
if !ok {
return nil, fmt.Errorf("expected []byte value for %s", subscriptionmanager.ParamNameClientSecret)
}
val = params[subscriptionmanager.ParamNameTokenURL]
tokenURL, ok := val.([]byte)
if !ok {
return nil, fmt.Errorf("expected []byte value for %s", subscriptionmanager.ParamNameTokenURL)
}
val = params[subscriptionmanager.ParamNameCertsURL]
certsURL, ok := val.([]byte)
if !ok {
return nil, fmt.Errorf("expected []byte value for %s", subscriptionmanager.ParamNameCertsURL)
}
return &backendeventmesh.OAuth2ClientCredentials{
ClientID: string(id),
ClientSecret: string(secret),
TokenURL: string(tokenURL),
CertsURL: string(certsURL),
}, nil
}
func (c *SubscriptionManager) namedLogger() *zap.SugaredLogger {
return c.logger.WithContext().Named(subscriptionManagerName)
}