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controller.go
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controller.go
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/*
Copyright 2020 Google LLC
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 keda
import (
"context"
"knative.dev/pkg/injection"
"cloud.google.com/go/pubsub"
"go.uber.org/zap"
"k8s.io/client-go/discovery"
"k8s.io/client-go/tools/cache"
"github.com/google/knative-gcp/pkg/apis/configs/gcpauth"
"github.com/google/knative-gcp/pkg/apis/duck"
v1 "github.com/google/knative-gcp/pkg/apis/intevents/v1"
"github.com/google/knative-gcp/pkg/client/injection/ducks/duck/v1/resource"
pullsubscriptioninformers "github.com/google/knative-gcp/pkg/client/injection/informers/intevents/v1/pullsubscription"
pullsubscriptionreconciler "github.com/google/knative-gcp/pkg/client/injection/reconciler/intevents/v1/pullsubscription"
"github.com/google/knative-gcp/pkg/reconciler"
"github.com/google/knative-gcp/pkg/reconciler/identity"
"github.com/google/knative-gcp/pkg/reconciler/identity/iam"
"github.com/google/knative-gcp/pkg/reconciler/intevents"
psreconciler "github.com/google/knative-gcp/pkg/reconciler/intevents/pullsubscription"
"github.com/kelseyhightower/envconfig"
eventingduck "knative.dev/eventing/pkg/duck"
deploymentinformer "knative.dev/pkg/client/injection/kube/informers/apps/v1/deployment"
serviceaccountinformers "knative.dev/pkg/client/injection/kube/informers/core/v1/serviceaccount"
"knative.dev/pkg/configmap"
"knative.dev/pkg/controller"
"knative.dev/pkg/logging"
"knative.dev/pkg/metrics"
pkgreconciler "knative.dev/pkg/reconciler"
"knative.dev/pkg/resolver"
tracingconfig "knative.dev/pkg/tracing/config"
)
const (
// reconcilerName is the name of the reconciler
reconcilerName = "KedaPullSubscriptions"
// controllerAgentName is the string used by this controller to identify
// itself when creating events.
controllerAgentName = "cloud-run-events-pubsub-keda-pullsubscription-controller"
resourceGroup = "pullsubscriptions.internal.events.cloud.google.com"
)
type envConfig struct {
// ReceiveAdapter is the receive adapters image. Required.
ReceiveAdapter string `envconfig:"PUBSUB_RA_IMAGE" required:"true"`
}
type Constructor injection.ControllerConstructor
// NewConstructor creates a constructor to make a KEDA-based PullSubscription controller.
func NewConstructor(ipm iam.IAMPolicyManager, gcpas *gcpauth.StoreSingleton) Constructor {
return func(ctx context.Context, cmw configmap.Watcher) *controller.Impl {
return newController(ctx, cmw, ipm, gcpas.Store(ctx, cmw))
}
}
func newController(
ctx context.Context,
cmw configmap.Watcher,
ipm iam.IAMPolicyManager,
gcpas *gcpauth.Store,
) *controller.Impl {
deploymentInformer := deploymentinformer.Get(ctx)
pullSubscriptionInformer := pullsubscriptioninformers.Get(ctx)
serviceAccountInformer := serviceaccountinformers.Get(ctx)
logger := logging.FromContext(ctx).Named(controllerAgentName).Desugar()
var env envConfig
if err := envconfig.Process("", &env); err != nil {
logger.Fatal("Failed to process env var", zap.Error(err))
}
pubsubBase := &intevents.PubSubBase{
Base: reconciler.NewBase(ctx, controllerAgentName, cmw),
}
r := &Reconciler{
Base: &psreconciler.Base{
PubSubBase: pubsubBase,
Identity: identity.NewIdentity(ctx, ipm, gcpas),
DeploymentLister: deploymentInformer.Lister(),
PullSubscriptionLister: pullSubscriptionInformer.Lister(),
ReceiveAdapterImage: env.ReceiveAdapter,
CreateClientFn: pubsub.NewClient,
ControllerAgentName: controllerAgentName,
ResourceGroup: resourceGroup,
},
}
impl := pullsubscriptionreconciler.NewImpl(ctx, r)
pubsubBase.Logger.Info("Setting up event handlers")
onlyKedaScaler := pkgreconciler.AnnotationFilterFunc(duck.AutoscalingClassAnnotation, duck.KEDA, false)
pullSubscriptionHandler := cache.FilteringResourceEventHandler{
FilterFunc: onlyKedaScaler,
Handler: controller.HandleAll(impl.Enqueue),
}
pullSubscriptionInformer.Informer().AddEventHandlerWithResyncPeriod(pullSubscriptionHandler, reconciler.DefaultResyncPeriod)
deploymentInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: onlyKedaScaler,
Handler: controller.HandleAll(impl.EnqueueControllerOf),
})
serviceAccountInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: controller.FilterControllerGK(v1.Kind("PullSubscription")),
Handler: controller.HandleAll(impl.EnqueueControllerOf),
})
r.UriResolver = resolver.NewURIResolver(ctx, impl.EnqueueKey)
r.ReconcileDataPlaneFn = r.ReconcileScaledObject
r.scaledObjectTracker = eventingduck.NewListableTracker(ctx, resource.Get, impl.EnqueueKey, controller.GetTrackerLease(ctx))
r.discoveryFn = discovery.ServerSupportsVersion
cmw.Watch(logging.ConfigMapName(), r.UpdateFromLoggingConfigMap)
cmw.Watch(metrics.ConfigMapName(), r.UpdateFromMetricsConfigMap)
cmw.Watch(tracingconfig.ConfigName, r.UpdateFromTracingConfigMap)
return impl
}