Provision contract with OIDC information (knative-extensions#3646)

* Provision contract with OIDC information

* Add DLS audience in KafkaChannel CRD

* Update KafkaSource to expose its sinks audience in status

* Update Trigger test to include OIDC SA in contract

* Propagate KafkaSources OIDC serviceAccountName to consumer and consumergroup

* Propagate triggerv2s serviceAccountName to consumergroup

* Fix unit test

control-plane/config/eventing-kafka-broker/100-channel/100-kafka-channel.yaml

@@ -86,6 +86,9 @@ spec:
                           type: string
                         CACerts:
                           type: string
+                        audience:
+                          description: Audience is the OIDC audience for the deadLetterSink.
+                          type: string
                     retry:
                       description: Retry is the minimum number of retries the sender should attempt when sending an event before moving it to the dead letter sink.
                       type: integer
@@ -132,6 +135,9 @@ spec:
                                 type: string
                               CACerts:
                                 type: string
+                              audience:
+                                description: Audience is the OIDC audience for the deadLetterSink.
+                                type: string
                           retry:
                             description: Retry is the minimum number of retries the sender should attempt when sending an event before moving it to the dead letter sink.
                             type: integer

control-plane/config/eventing-kafka-broker/100-source/100-kafka-source.yaml

@@ -87,9 +87,6 @@ spec:
                       description: DeadLetterSink is the sink receiving event that could not be sent to a destination.
                       type: object
                       properties:
-                        CACerts:
-                          description: CACerts are Certification Authority (CA) certificates in PEM format according to https://www.rfc-editor.org/rfc/rfc7468. If set, these CAs are appended to the set of CAs provided by the Addressable target, if any.
-                          type: string
                         ref:
                           description: Ref points to an Addressable.
                           type: object
@@ -118,6 +115,12 @@ spec:
                         uri:
                           description: URI can be an absolute URL(non-empty scheme and non-empty host) pointing to the target or a relative URI. Relative URIs will be resolved using the base URI retrieved from Ref.
                           type: string
+                        CACerts:
+                          description: CACerts are Certification Authority (CA) certificates in PEM format according to https://www.rfc-editor.org/rfc/rfc7468. If set, these CAs are appended to the set of CAs provided by the Addressable target, if any.
+                          type: string
+                        audience:
+                          description: Audience is the OIDC audience for the deadLetterSink.
+                          type: string
                     retry:
                       description: Retry is the minimum number of retries the sender should attempt when sending an event before moving it to the dead letter sink.
                       type: integer
@@ -271,9 +274,6 @@ spec:
                   description: Sink is a reference to an object that will resolve to a uri to use as the sink.
                   type: object
                   properties:
-                    CACerts:
-                      description: CACerts are Certification Authority (CA) certificates in PEM format according to https://www.rfc-editor.org/rfc/rfc7468. If set, these CAs are appended to the set of CAs provided by the Addressable target, if any.
-                      type: string
                     ref:
                       description: Ref points to an Addressable.
                       type: object
@@ -302,6 +302,12 @@ spec:
                     uri:
                       description: URI can be an absolute URL(non-empty scheme and non-empty host) pointing to the target or a relative URI. Relative URIs will be resolved using the base URI retrieved from Ref.
                       type: string
+                    CACerts:
+                      description: CACerts are Certification Authority (CA) certificates in PEM format according to https://www.rfc-editor.org/rfc/rfc7468. If set, these CAs are appended to the set of CAs provided by the Addressable target, if any.
+                      type: string
+                    audience:
+                      description: Audience is the OIDC audience for the sink.
+                      type: string
                 topics:
                   description: Topic topics to consume messages from
                   type: array
@@ -392,6 +398,16 @@ spec:
                 sinkUri:
                   description: SinkURI is the current active sink URI that has been configured for the Source.
                   type: string
+                sinkAudience:
+                  description: SinkAudience is the OIDC audience of the sink.
+                  type: string
+                auth:
+                  description: Auth provides the relevant information for OIDC authentication.
+                  type: object
+                  properties:
+                    serviceAccountName:
+                      description: ServiceAccountName is the name of the generated service account used for this components OIDC authentication.
+                      type: string
       subresources:
         status: {}
         scale:

control-plane/pkg/apis/internals/kafka/eventing/v1alpha1/consumer_group_types.go

@@ -104,6 +104,10 @@ type ConsumerGroupSpec struct {
 	// More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
 	// +optional
 	Selector map[string]string `json:"selector,omitempty" protobuf:"bytes,2,rep,name=selector"`
+
+	// OIDCServiceAccountName is the name of service account used for this components
+	// OIDC authentication.
+	OIDCServiceAccountName *string `json:"oidcServiceAccountName,omitempty"`
 }
 
 type ConsumerGroupStatus struct {
@@ -124,6 +128,10 @@ type ConsumerGroupStatus struct {
 	// +optional
 	SubscriberCACerts *string `json:"subscriberCACerts,omitempty"`
 
+	// SubscriberAudience is the OIDC audience for the resolved URI
+	// +optional
+	SubscriberAudience *string `json:"subscriberAudience,omitempty"`
+
 	// DeliveryStatus contains a resolved URL to the dead letter sink address, and any other
 	// resolved delivery options.
 	eventingduckv1.DeliveryStatus `json:",inline"`

control-plane/pkg/apis/internals/kafka/eventing/v1alpha1/consumer_types.go

@@ -103,6 +103,10 @@ type ConsumerSpec struct {
 
 	// PodBind represents a reference to the pod in which the consumer should be placed.
 	PodBind *PodBind `json:"podBind"`
+
+	// OIDCServiceAccountName is the name of the generated service account
+	// used for this components OIDC authentication.
+	OIDCServiceAccountName *string `json:"oidcServiceAccountName,omitempty"`
 }
 
 type ReplyStrategy struct {
@@ -208,6 +212,10 @@ type ConsumerStatus struct {
 	// +optional
 	SubscriberCACerts *string `json:"subscriberCACerts,omitempty"`
 
+	// SubscriberAudience is the OIDC audience for the resolved URI
+	// +optional
+	SubscriberAudience *string `json:"subscriberAudience,omitempty"`
+
 	// DeliveryStatus contains a resolved URL to the dead letter sink address, and any other
 	// resolved delivery options.
 	eventingduck.DeliveryStatus `json:",inline"`

control-plane/pkg/apis/sources/v1beta1/kafka_lifecycle.go

@@ -95,6 +95,7 @@ func (s *KafkaSourceStatus) MarkSink(addr *duckv1.Addressable) {
 	if addr.URL != nil && !addr.URL.IsEmpty() {
 		s.SinkURI = addr.URL
 		s.SinkCACerts = addr.CACerts
+		s.SinkAudience = addr.Audience
 		KafkaSourceCondSet.Manage(s).MarkTrue(KafkaConditionSinkProvided)
 	} else {
 		KafkaSourceCondSet.Manage(s).MarkUnknown(KafkaConditionSinkProvided, "SinkEmpty", "Sink has resolved to empty.%s", "")

control-plane/pkg/core/config/utils.go

@@ -77,6 +77,9 @@ func EgressConfigFromDelivery(
 		if deadLetterSinkAddr.CACerts != nil {
 			egressConfig.DeadLetterCACerts = *deadLetterSinkAddr.CACerts
 		}
+		if deadLetterSinkAddr.Audience != nil {
+			egressConfig.DeadLetterAudience = *deadLetterSinkAddr.Audience
+		}
 	}
 
 	if delivery.Retry != nil {

control-plane/pkg/reconciler/broker/broker.go

@@ -654,6 +654,10 @@ func (r *Reconciler) reconcilerBrokerResource(ctx context.Context, topic string,
 		}
 	}
 
+	if broker.Status.Address != nil && broker.Status.Address.Audience != nil {
+		resource.Ingress.Audience = *broker.Status.Address.Audience
+	}
+
 	egressConfig, err := coreconfig.EgressConfigFromDelivery(ctx, r.Resolver, broker, broker.Spec.Delivery, r.DefaultBackoffDelayMs)
 	if err != nil {
 		return nil, err

control-plane/pkg/reconciler/channel/channel.go

@@ -618,6 +618,12 @@ func (r *Reconciler) getSubscriberConfig(ctx context.Context, channel *messaging
 	if subscriber.SubscriberCACerts != nil && *subscriber.SubscriberCACerts != "" {
 		egress.DestinationCACerts = *subscriber.SubscriberCACerts
 	}
+	if subscriber.SubscriberAudience != nil && *subscriber.SubscriberAudience != "" {
+		egress.DestinationAudience = *subscriber.SubscriberAudience
+	}
+	if subscriber.Auth != nil && subscriber.Auth.ServiceAccountName != nil {
+		egress.OidcServiceAccountName = *subscriber.Auth.ServiceAccountName
+	}
 
 	if subscriptionName != "" {
 		egress.Reference = &contract.Reference{
@@ -634,6 +640,9 @@ func (r *Reconciler) getSubscriberConfig(ctx context.Context, channel *messaging
 		if subscriber.ReplyCACerts != nil && *subscriber.ReplyCACerts != "" {
 			egress.ReplyUrlCACerts = *subscriber.ReplyCACerts
 		}
+		if subscriber.ReplyAudience != nil && *subscriber.ReplyAudience != "" {
+			egress.ReplyUrlAudience = *subscriber.ReplyAudience
+		}
 	}
 
 	subscriptionEgressConfig, err := coreconfig.EgressConfigFromDelivery(ctx, r.Resolver, channel, subscriber.Delivery, r.DefaultBackoffDelayMs)
@@ -713,6 +722,10 @@ func (r *Reconciler) getChannelContractResource(ctx context.Context, topic strin
 		}
 	}
 
+	if channel.Status.Address != nil && channel.Status.Address.Audience != nil {
+		resource.Ingress.Audience = *channel.Status.Address.Audience
+	}
+
 	egressConfig, err := coreconfig.EgressConfigFromDelivery(ctx, r.Resolver, channel, channel.Spec.Delivery, r.DefaultBackoffDelayMs)
 	if err != nil {
 		return nil, err

control-plane/pkg/reconciler/channel/v2/channelv2.go

@@ -703,6 +703,10 @@ func (r *Reconciler) getChannelContractResource(ctx context.Context, topic strin
 		}
 	}
 
+	if channel.Status.Address != nil && channel.Status.Address.Audience != nil {
+		resource.Ingress.Audience = *channel.Status.Address.Audience
+	}
+
 	egressConfig, err := coreconfig.EgressConfigFromDelivery(ctx, r.Resolver, channel, channel.Spec.Delivery, r.DefaultBackoffDelayMs)
 	if err != nil {
 		return nil, err

control-plane/pkg/reconciler/consumer/consumer.go

@@ -145,6 +145,7 @@ func (r *Reconciler) reconcileContractEgress(ctx context.Context, c *kafkaintern
 	}
 	c.Status.SubscriberURI = destinationAddr.URL
 	c.Status.SubscriberCACerts = destinationAddr.CACerts
+	c.Status.SubscriberAudience = destinationAddr.Audience
 
 	egressConfig := &contract.EgressConfig{}
 	if c.Spec.Delivery != nil {
@@ -158,6 +159,9 @@ func (r *Reconciler) reconcileContractEgress(ctx context.Context, c *kafkaintern
 		if egressConfig.DeadLetterCACerts != "" {
 			c.Status.DeliveryStatus.DeadLetterSinkCACerts = pointer.String(egressConfig.DeadLetterCACerts)
 		}
+		if egressConfig.DeadLetterAudience != "" {
+			c.Status.DeliveryStatus.DeadLetterSinkAudience = pointer.String(egressConfig.DeadLetterAudience)
+		}
 	}
 
 	egress := &contract.Egress{
@@ -180,11 +184,18 @@ func (r *Reconciler) reconcileContractEgress(ctx context.Context, c *kafkaintern
 	if destinationAddr.CACerts != nil {
 		egress.DestinationCACerts = *destinationAddr.CACerts
 	}
+	if destinationAddr.Audience != nil {
+		egress.DestinationAudience = *destinationAddr.Audience
+	}
 
 	if c.Spec.Configs.KeyType != nil {
 		egress.KeyType = coreconfig.KeyTypeFromString(*c.Spec.Configs.KeyType)
 	}
 
+	if c.Spec.OIDCServiceAccountName != nil {
+		egress.OidcServiceAccountName = *c.Spec.OIDCServiceAccountName
+	}
+
 	if err := r.reconcileReplyStrategy(ctx, c, egress); err != nil {
 		return nil, fmt.Errorf("failed to reconcile reply strategy: %w", err)
 	}
@@ -294,6 +305,9 @@ func (r *Reconciler) reconcileReplyStrategy(ctx context.Context, c *kafkainterna
 		if destination.CACerts != nil {
 			egress.ReplyUrlCACerts = *destination.CACerts
 		}
+		if destination.Audience != nil {
+			egress.ReplyUrlAudience = *destination.Audience
+		}
 		return nil
 	}
 	if c.Spec.Reply.TopicReply != nil && c.Spec.Reply.TopicReply.Enabled {

control-plane/pkg/reconciler/consumergroup/consumergroup.go

@@ -500,12 +500,18 @@ func (r *Reconciler) propagateStatus(ctx context.Context, cg *kafkainternals.Con
 			if c.Status.SubscriberCACerts != nil {
 				cg.Status.SubscriberCACerts = c.Status.SubscriberCACerts
 			}
+			if c.Status.SubscriberAudience != nil {
+				cg.Status.SubscriberAudience = c.Status.SubscriberAudience
+			}
 			if c.Status.DeliveryStatus.DeadLetterSinkURI != nil {
 				cg.Status.DeliveryStatus.DeadLetterSinkURI = c.Status.DeadLetterSinkURI
 			}
 			if c.Status.DeliveryStatus.DeadLetterSinkCACerts != nil {
 				cg.Status.DeliveryStatus.DeadLetterSinkCACerts = c.Status.DeadLetterSinkCACerts
 			}
+			if c.Status.DeliveryStatus.DeadLetterSinkAudience != nil {
+				cg.Status.DeliveryStatus.DeadLetterSinkAudience = c.Status.DeadLetterSinkAudience
+			}
 		} else if condition == nil { // Propagate only a single false condition
 			cond := c.GetConditionSet().Manage(c.GetStatus()).GetTopLevelCondition()
 			if cond.IsFalse() {
@@ -524,6 +530,7 @@ func (r *Reconciler) propagateStatus(ctx context.Context, cg *kafkainternals.Con
 		}
 		cg.Status.SubscriberURI = subscriber.URL
 		cg.Status.SubscriberCACerts = subscriber.CACerts
+		cg.Status.SubscriberAudience = subscriber.Audience
 	}
 
 	return condition, nil

control-plane/pkg/reconciler/sink/kafka_sink.go

@@ -211,6 +211,11 @@ func (r *Reconciler) reconcileKind(ctx context.Context, ks *eventing.KafkaSink)
 			},
 		}
 	}
+
+	if ks.Status.Address != nil && ks.Status.Address.Audience != nil {
+		sinkConfig.Ingress.Audience = *ks.Status.Address.Audience
+	}
+
 	statusConditionManager.ConfigResolved()
 
 	sinkIndex := coreconfig.FindResource(ct, ks.UID)

control-plane/pkg/reconciler/source/source.go

@@ -201,6 +201,10 @@ func (r Reconciler) reconcileConsumerGroup(ctx context.Context, ks *sources.Kafk
 		expectedCg.Spec.Template.Spec.Configs.KeyType = &kt
 	}
 
+	if ks.Status.Auth != nil {
+		expectedCg.Spec.Template.Spec.OIDCServiceAccountName = ks.Status.Auth.ServiceAccountName
+	}
+
 	// TODO: make keda annotation values configurable and maybe unexposed
 	expectedCg.Annotations = keda.SetAutoscalingAnnotations(ks.Annotations)
 
@@ -260,8 +264,9 @@ func propagateConsumerGroupStatus(cg *internalscg.ConsumerGroup, ks *sources.Kaf
 		}
 	}
 	ks.Status.MarkSink(&duckv1.Addressable{
-		URL:     cg.Status.SubscriberURI,
-		CACerts: cg.Status.SubscriberCACerts,
+		URL:      cg.Status.SubscriberURI,
+		CACerts:  cg.Status.SubscriberCACerts,
+		Audience: cg.Status.SubscriberAudience,
 	})
 	ks.Status.Placeable = cg.Status.Placeable
 	if cg.Status.Replicas != nil {

control-plane/pkg/reconciler/source/source_test.go

@@ -1566,6 +1566,7 @@ func TestReconcileKind(t *testing.T) {
 						),
 						ConsumerSubscriber(NewSourceSinkReference()),
 						ConsumerReply(ConsumerNoReply()),
+						ConsumerOIDCServiceAccountName(makeKafkaSourceOIDCServiceAccount().Name),
 					)),
 					ConsumerGroupReplicas(1),
 				),

control-plane/pkg/reconciler/testing/objects_consumer.go

@@ -200,6 +200,12 @@ func ConsumerTopics(topics ...string) ConsumerSpecOption {
 	}
 }
 
+func ConsumerOIDCServiceAccountName(sa string) ConsumerSpecOption {
+	return func(c *kafkainternals.ConsumerSpec) {
+		c.OIDCServiceAccountName = &sa
+	}
+}
+
 func ConsumerPlacement(pb kafkainternals.PodBind) ConsumerSpecOption {
 	return func(c *kafkainternals.ConsumerSpec) {
 		c.PodBind = &pb

control-plane/pkg/reconciler/trigger/trigger.go

@@ -339,6 +339,12 @@ func (r *Reconciler) reconcileTriggerEgress(ctx context.Context, broker *eventin
 	if destination.CACerts != nil {
 		egress.DestinationCACerts = *destination.CACerts
 	}
+	if destination.Audience != nil {
+		egress.DestinationAudience = *destination.Audience
+	}
+	if trigger.Status.Auth != nil && trigger.Status.Auth.ServiceAccountName != nil {
+		egress.OidcServiceAccountName = *trigger.Status.Auth.ServiceAccountName
+	}
 
 	newFiltersEnabled := func() bool {
 		r.FlagsLock.RLock()