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jetstream.go
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jetstream.go
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package jetstream
import (
"context"
"fmt"
"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/backend/cleaner"
"golang.org/x/xerrors"
"github.com/pkg/errors"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/dynamic"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/manager"
eventingv1alpha1 "github.com/kyma-project/kyma/components/eventing-controller/api/v1alpha1"
eventingv1alpha2 "github.com/kyma-project/kyma/components/eventing-controller/api/v1alpha2"
"github.com/kyma-project/kyma/components/eventing-controller/controllers/subscription/jetstream"
"github.com/kyma-project/kyma/components/eventing-controller/logger"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/eventtype"
backendjetstream "github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/jetstream"
backendmetrics "github.com/kyma-project/kyma/components/eventing-controller/pkg/backend/metrics"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/env"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/subscriptionmanager"
)
const (
subscriptionManagerName = "jetstream-subscription-manager"
)
// AddToScheme adds all types of clientset and eventing into the given 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
}
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
}
type SubscriptionManager struct {
cancel context.CancelFunc
envCfg env.NATSConfig
restCfg *rest.Config
metricsAddr string
metricsCollector *backendmetrics.Collector
mgr manager.Manager
backendv2 backendjetstream.Backend
logger *logger.Logger
}
// NewSubscriptionManager creates the subscription manager for JetStream.
func NewSubscriptionManager(restCfg *rest.Config, natsConfig env.NATSConfig, metricsAddr string,
metricsCollector *backendmetrics.Collector, logger *logger.Logger) *SubscriptionManager {
return &SubscriptionManager{
envCfg: natsConfig,
restCfg: restCfg,
metricsAddr: metricsAddr,
metricsCollector: metricsCollector,
logger: logger,
}
}
// Init initialize the JetStream subscription manager.
func (sm *SubscriptionManager) Init(mgr manager.Manager) error {
if len(sm.envCfg.URL) == 0 {
return xerrors.Errorf("env var URL must be a non-empty value")
}
sm.mgr = mgr
sm.namedLogger().Info("initialized JetStream subscription manager")
return nil
}
func (sm *SubscriptionManager) Start(defaultSubsConfig env.DefaultSubscriptionConfig, _ subscriptionmanager.Params) error {
sm.metricsCollector.ResetSubscriptionStatus()
ctx, cancel := context.WithCancel(context.Background())
sm.cancel = cancel
client := sm.mgr.GetClient()
recorder := sm.mgr.GetEventRecorderFor("eventing-controller-jetstream")
// Initialize v1alpha1 event type cleaner for conversion webhook
simpleCleaner := eventtype.NewSimpleCleaner(sm.envCfg.EventTypePrefix, sm.logger)
eventingv1alpha1.InitializeEventTypeCleaner(simpleCleaner)
// Initialize v1alpha2 event type cleaner
jsCleaner := cleaner.NewJetStreamCleaner(sm.logger)
jetStreamHandler := backendjetstream.NewJetStream(sm.envCfg,
sm.metricsCollector, jsCleaner, defaultSubsConfig, sm.logger)
jetStreamReconciler := jetstream.NewReconciler(
ctx,
client,
jetStreamHandler,
sm.logger,
recorder,
jsCleaner,
sink.NewValidator(ctx, client, recorder),
sm.metricsCollector,
)
sm.backendv2 = jetStreamReconciler.Backend
if err := jetStreamHandler.Initialize(jetStreamReconciler.HandleNatsConnClose); err != nil {
return fmt.Errorf("failed to initialise jetstream reconciler: %w", err)
}
// delete dangling invalid consumers here
var subs eventingv1alpha2.SubscriptionList
if err := client.List(context.Background(), &subs); err != nil {
return fmt.Errorf("failed to get all subscription resources: %w", err)
}
if err := jetStreamHandler.DeleteInvalidConsumers(subs.Items); err != nil {
return err
}
// start the subscription controller
if err := jetStreamReconciler.SetupUnmanaged(sm.mgr); err != nil {
return xerrors.Errorf("unable to setup the NATS subscription controller: %v", err)
}
sm.namedLogger().Info("Started v1alpha2 JetStream subscription manager")
return nil
}
func (sm *SubscriptionManager) Stop(runCleanup bool) error {
sm.cancel()
if !runCleanup {
return nil
}
dynamicClient := dynamic.NewForConfigOrDie(sm.restCfg)
return cleanupv2(sm.backendv2, dynamicClient, sm.namedLogger())
}
// clean removes all JetStream artifacts.
func cleanupv2(backend backendjetstream.Backend, dynamicClient dynamic.Interface, logger *zap.SugaredLogger) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var ok bool
var jsBackend *backendjetstream.JetStream
if jsBackend, ok = backend.(*backendjetstream.JetStream); !ok {
err := errors.New("converting backend to JetStream v2 backend failed")
return err
}
// 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 all status.
isCleanupSuccessful := true
for _, v := range subs.Items {
sub := v
subKey := types.NamespacedName{Namespace: sub.Namespace, Name: sub.Name}
log := logger.With("key", subKey.String())
desiredSub := sub.DuplicateWithStatusDefaults()
if updateErr := backendutils.UpdateSubscriptionStatus(ctx, dynamicClient, desiredSub); updateErr != nil {
isCleanupSuccessful = false
log.Errorw("Failed to update JetStream v2 subscription status", "error", err)
}
// clean subscriptions from JetStream.
if jsBackend != nil {
if delErr := jsBackend.DeleteSubscription(&sub); delErr != nil {
isCleanupSuccessful = false
log.Errorw("Failed to delete JetStream v2 subscription", "error", delErr)
}
}
}
logger.Debugw("Finished cleanup process", "success", isCleanupSuccessful)
return nil
}
func (sm *SubscriptionManager) namedLogger() *zap.SugaredLogger {
return sm.logger.WithContext().Named(subscriptionManagerName)
}