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controller.go
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controller.go
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/*
* Copyright 2020 The Knative Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package trigger
import (
"context"
"go.uber.org/zap"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/tools/cache"
v1 "knative.dev/eventing/pkg/client/informers/externalversions/eventing/v1"
kubeclient "knative.dev/pkg/client/injection/kube/client"
configmapinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/configmap"
podinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/pod"
secretinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/secret"
"knative.dev/pkg/configmap"
"knative.dev/pkg/controller"
"knative.dev/pkg/logging"
"knative.dev/pkg/resolver"
apisconfig "knative.dev/eventing-kafka-broker/control-plane/pkg/apis/config"
"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/clientpool"
"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/offset"
apiseventing "knative.dev/eventing/pkg/apis/eventing"
eventing "knative.dev/eventing/pkg/apis/eventing/v1"
"knative.dev/eventing/pkg/apis/feature"
eventingclient "knative.dev/eventing/pkg/client/injection/client"
brokerinformer "knative.dev/eventing/pkg/client/injection/informers/eventing/v1/broker"
triggerinformer "knative.dev/eventing/pkg/client/injection/informers/eventing/v1/trigger"
triggerreconciler "knative.dev/eventing/pkg/client/injection/reconciler/eventing/v1/trigger"
eventinglisters "knative.dev/eventing/pkg/client/listers/eventing/v1"
serviceaccountinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/serviceaccount"
"knative.dev/eventing-kafka-broker/control-plane/pkg/config"
"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka"
"knative.dev/eventing-kafka-broker/control-plane/pkg/reconciler/base"
)
const (
ControllerAgentName = "kafka-trigger-controller"
FinalizerName = "kafka.triggers.eventing.knative.dev"
)
func NewController(ctx context.Context, watcher configmap.Watcher, configs *config.Env) *controller.Impl {
logger := logging.FromContext(ctx).Desugar()
configmapInformer := configmapinformer.Get(ctx)
brokerInformer := brokerinformer.Get(ctx)
triggerInformer := triggerinformer.Get(ctx)
triggerLister := triggerInformer.Lister()
serviceaccountInformer := serviceaccountinformer.Get(ctx)
clientPool := clientpool.Get(ctx)
reconciler := &Reconciler{
Reconciler: &base.Reconciler{
KubeClient: kubeclient.Get(ctx),
PodLister: podinformer.Get(ctx).Lister(),
SecretLister: secretinformer.Get(ctx).Lister(),
DataPlaneConfigMapNamespace: configs.DataPlaneConfigMapNamespace,
DataPlaneConfigConfigMapName: configs.DataPlaneConfigConfigMapName,
ContractConfigMapName: configs.ContractConfigMapName,
ContractConfigMapFormat: configs.ContractConfigMapFormat,
DataPlaneNamespace: configs.SystemNamespace,
DispatcherLabel: base.BrokerDispatcherLabel,
ReceiverLabel: base.BrokerReceiverLabel,
},
FlagsHolder: &FlagsHolder{
Flags: feature.Flags{},
},
BrokerLister: brokerInformer.Lister(),
ConfigMapLister: configmapInformer.Lister(),
EventingClient: eventingclient.Get(ctx),
Env: configs,
BrokerClass: kafka.BrokerClass,
DataPlaneConfigMapLabeler: base.NoopConfigmapOption,
KafkaFeatureFlags: apisconfig.DefaultFeaturesConfig(),
GetKafkaClient: clientPool.GetClient,
GetKafkaClusterAdmin: clientPool.GetClusterAdmin,
InitOffsetsFunc: offset.InitOffsets,
ServiceAccountLister: serviceaccountInformer.Lister(),
}
impl := triggerreconciler.NewImpl(ctx, reconciler, func(impl *controller.Impl) controller.Options {
return controller.Options{
FinalizerName: FinalizerName,
AgentName: ControllerAgentName,
SkipStatusUpdates: false,
PromoteFilterFunc: filterTriggers(reconciler.BrokerLister, kafka.BrokerClass, FinalizerName),
}
})
setupFeatureStore(ctx, watcher, reconciler.FlagsHolder, impl, triggerInformer)
reconciler.Resolver = resolver.NewURIResolverFromTracker(ctx, impl.Tracker)
triggerInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: filterTriggers(reconciler.BrokerLister, kafka.BrokerClass, FinalizerName),
Handler: controller.HandleAll(impl.Enqueue),
})
// Filter Brokers and enqueue associated Triggers
brokerInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: kafka.BrokerClassFilter(),
Handler: enqueueTriggers(logger, triggerLister, impl.Enqueue),
})
globalResync := func(_ interface{}) {
impl.FilteredGlobalResync(filterTriggers(reconciler.BrokerLister, kafka.BrokerClass, FinalizerName), triggerInformer.Informer())
}
kafkaConfigStore := apisconfig.NewStore(ctx, func(name string, value *apisconfig.KafkaFeatureFlags) {
reconciler.KafkaFeatureFlags.Reset(value)
if globalResync != nil {
globalResync(nil)
}
})
kafkaConfigStore.WatchConfigs(watcher)
featureStore := feature.NewStore(logging.FromContext(ctx).Named("feature-config-store"), func(name string, value interface{}) {
if globalResync != nil {
globalResync(nil)
}
})
featureStore.WatchConfigs(watcher)
configmapInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controller.FilterWithNameAndNamespace(configs.DataPlaneConfigMapNamespace, configs.ContractConfigMapName),
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: globalResync,
DeleteFunc: globalResync,
},
})
reconciler.Tracker = impl.Tracker
secretinformer.Get(ctx).Informer().AddEventHandler(controller.HandleAll(reconciler.Tracker.OnChanged))
// Reconciler Trigger when the OIDC service account changes
serviceaccountInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controller.FilterController(&eventing.Trigger{}),
Handler: controller.HandleAll(impl.EnqueueControllerOf),
})
return impl
}
func filterTriggers(lister eventinglisters.BrokerLister, brokerClass string, finalizer string) func(interface{}) bool {
return func(obj interface{}) bool {
trigger, ok := obj.(*eventing.Trigger)
if !ok {
return false
}
if hasKafkaBrokerTriggerFinalizer(trigger.Finalizers, finalizer) {
return true
}
broker, err := lister.Brokers(trigger.Namespace).Get(trigger.Spec.Broker)
if err != nil {
return false
}
value, ok := broker.GetAnnotations()[apiseventing.BrokerClassKey]
return ok && value == brokerClass
}
}
func hasKafkaBrokerTriggerFinalizer(finalizers []string, finalizerName string) bool {
for _, f := range finalizers {
if f == finalizerName {
return true
}
}
return false
}
func enqueueTriggers(
logger *zap.Logger,
lister eventinglisters.TriggerLister,
enqueue func(obj interface{})) cache.ResourceEventHandler {
return controller.HandleAll(func(obj interface{}) {
if broker, ok := obj.(*eventing.Broker); ok {
selector := labels.SelectorFromSet(map[string]string{apiseventing.BrokerLabelKey: broker.Name})
triggers, err := lister.Triggers(broker.Namespace).List(selector)
if err != nil {
logger.Warn("Failed to list triggers", zap.Any("broker", broker), zap.Error(err))
return
}
for _, trigger := range triggers {
enqueue(trigger)
}
}
})
}
func setupFeatureStore(ctx context.Context, watcher configmap.Watcher, flagsHolder *FlagsHolder, impl *controller.Impl, triggerInformer v1.TriggerInformer) {
featureStore := feature.NewStore(
logging.FromContext(ctx).Named("feature-config-eventing-store"),
func(name string, value interface{}) {
logger := logging.FromContext(ctx).Desugar()
flags, ok := value.(feature.Flags)
if !ok {
logger.Warn("Features ConfigMap " + name + " updated but we didn't get expected flags. Skipping updating cached features")
}
logger.Debug("Features ConfigMap " + name + " updated. Updating cached features.")
flagsHolder.FlagsLock.Lock()
defer flagsHolder.FlagsLock.Unlock()
flagsHolder.Flags = flags
impl.GlobalResync(triggerInformer.Informer())
},
)
featureStore.WatchConfigs(watcher)
}