Emit kubernetes events from KEDA

CHANGELOG.md

@@ -43,6 +43,7 @@
 - Global authentication credentials can be managed using `ClusterTriggerAuthentication` objects ([#1452](https://github.com/kedacore/keda/pull/1452))
 - Introducing OpenStack Swift scaler ([#1342](https://github.com/kedacore/keda/issues/1342))
 - Introducing MongoDB scaler ([#1467](https://github.com/kedacore/keda/pull/1467))
+- Emit Kubernetes Events on KEDA events ([#1523](https://github.com/kedacore/keda/pull/1523)):wq
 
 ### Improvements
 

adapter/main.go

@@ -8,6 +8,9 @@ import (
 	"strconv"
 	"time"
 
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/tools/record"
+
 	appsv1 "k8s.io/api/apps/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
 	openapinamer "k8s.io/apiserver/pkg/endpoints/openapi"
@@ -70,7 +73,9 @@ func (a *Adapter) makeProvider(globalHTTPTimeout time.Duration) (provider.Metric
 		return nil, fmt.Errorf("unable to construct new client (%s)", err)
 	}
 
-	handler := scaling.NewScaleHandler(kubeclient, nil, scheme, globalHTTPTimeout)
+	broadcaster := record.NewBroadcaster()
+	recorder := broadcaster.NewRecorder(scheme, corev1.EventSource{Component: "keda-metrics-adapter"})
+	handler := scaling.NewScaleHandler(kubeclient, nil, scheme, globalHTTPTimeout, recorder)
 
 	namespace, err := getWatchNamespace()
 	if err != nil {

api/v1alpha1/condition_types.go

@@ -115,6 +115,14 @@ func (c *Conditions) GetActiveCondition() Condition {
 	return c.getCondition(ConditionActive)
 }
 
+// GetReadyCondition returns Condition of type Ready
+func (c *Conditions) GetReadyCondition() Condition {
+	if *c == nil {
+		c = GetInitializedConditions()
+	}
+	return c.getCondition(ConditionReady)
+}
+
 func (c Conditions) getCondition(conditionType ConditionType) Condition {
 	for i := range c {
 		if c[i].Type == conditionType {

controllers/scaledjob_controller.go

@@ -5,6 +5,11 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+	corev1 "k8s.io/api/core/v1"
+
+	"k8s.io/client-go/tools/record"
+
 	"github.com/go-logr/logr"
 	batchv1 "k8s.io/api/batch/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
@@ -29,12 +34,13 @@ type ScaledJobReconciler struct {
 	Log               logr.Logger
 	Scheme            *runtime.Scheme
 	GlobalHTTPTimeout time.Duration
+	Recorder          record.EventRecorder
 	scaleHandler      scaling.ScaleHandler
 }
 
 // SetupWithManager initializes the ScaledJobReconciler instance and starts a new controller managed by the passed Manager instance.
 func (r *ScaledJobReconciler) SetupWithManager(mgr ctrl.Manager) error {
-	r.scaleHandler = scaling.NewScaleHandler(mgr.GetClient(), nil, mgr.GetScheme(), r.GlobalHTTPTimeout)
+	r.scaleHandler = scaling.NewScaleHandler(mgr.GetClient(), nil, mgr.GetScheme(), r.GlobalHTTPTimeout, mgr.GetEventRecorderFor("scale-handler"))
 
 	return ctrl.NewControllerManagedBy(mgr).
 		// Ignore updates to ScaledJob Status (in this case metadata.Generation does not change)
@@ -84,7 +90,12 @@ func (r *ScaledJobReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
 			reqLogger.Error(err, msg)
 			conditions.SetReadyCondition(metav1.ConditionFalse, "ScaledJobCheckFailed", msg)
 			conditions.SetActiveCondition(metav1.ConditionUnknown, "UnknownState", "ScaledJob check failed")
+			r.Recorder.Event(scaledJob, corev1.EventTypeWarning, eventreason.ScaledJobCheckFailed, msg)
 		} else {
+			wasReady := conditions.GetReadyCondition()
+			if wasReady.IsFalse() || wasReady.IsUnknown() {
+				r.Recorder.Event(scaledJob, corev1.EventTypeNormal, eventreason.ScaledJobReady, "ScaledJob is ready for scaling")
+			}
 			reqLogger.V(1).Info(msg)
 			conditions.SetReadyCondition(metav1.ConditionTrue, "ScaledJobReady", msg)
 		}

controllers/scaledjob_finalizer.go

@@ -3,6 +3,9 @@ package controllers
 import (
 	"context"
 
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+	corev1 "k8s.io/api/core/v1"
+
 	"github.com/go-logr/logr"
 
 	kedav1alpha1 "github.com/kedacore/keda/v2/api/v1alpha1"
@@ -33,6 +36,7 @@ func (r *ScaledJobReconciler) finalizeScaledJob(logger logr.Logger, scaledJob *k
 	}
 
 	logger.Info("Successfully finalized ScaledJob")
+	r.Recorder.Event(scaledJob, corev1.EventTypeNormal, eventreason.ScaledJobDeleted, "ScaledJob was deleted")
 	return nil
 }
 

controllers/scaledobject_controller.go

@@ -6,6 +6,10 @@ import (
 	"sync"
 	"time"
 
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/tools/record"
+
 	"github.com/go-logr/logr"
 	autoscalingv1 "k8s.io/api/autoscaling/v1"
 	autoscalingv2beta2 "k8s.io/api/autoscaling/v2beta2"
@@ -46,6 +50,7 @@ type ScaledObjectReconciler struct {
 	Client            client.Client
 	Scheme            *runtime.Scheme
 	GlobalHTTPTimeout time.Duration
+	Recorder          record.EventRecorder
 
 	scaleClient              *scale.ScalesGetter
 	restMapper               meta.RESTMapper
@@ -91,7 +96,7 @@ func (r *ScaledObjectReconciler) SetupWithManager(mgr ctrl.Manager) error {
 	// Init the rest of ScaledObjectReconciler
 	r.restMapper = mgr.GetRESTMapper()
 	r.scaledObjectsGenerations = &sync.Map{}
-	r.scaleHandler = scaling.NewScaleHandler(mgr.GetClient(), r.scaleClient, mgr.GetScheme(), r.GlobalHTTPTimeout)
+	r.scaleHandler = scaling.NewScaleHandler(mgr.GetClient(), r.scaleClient, mgr.GetScheme(), r.GlobalHTTPTimeout, mgr.GetEventRecorderFor("scale-handler"))
 
 	// Start controller
 	return ctrl.NewControllerManagedBy(mgr).
@@ -159,13 +164,20 @@ func (r *ScaledObjectReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error
 		reqLogger.Error(err, msg)
 		conditions.SetReadyCondition(metav1.ConditionFalse, "ScaledObjectCheckFailed", msg)
 		conditions.SetActiveCondition(metav1.ConditionUnknown, "UnkownState", "ScaledObject check failed")
+		r.Recorder.Event(scaledObject, corev1.EventTypeWarning, eventreason.ScaledObjectCheckFailed, msg)
 	} else {
+		wasReady := conditions.GetReadyCondition()
+		if wasReady.IsFalse() || wasReady.IsUnknown() {
+			r.Recorder.Event(scaledObject, corev1.EventTypeNormal, eventreason.ScaledObjectReady, "ScaledObject is ready for scaling")
+		}
 		reqLogger.V(1).Info(msg)
 		conditions.SetReadyCondition(metav1.ConditionTrue, "ScaledObjectReady", msg)
 	}
+
 	if err := kedacontrollerutil.SetStatusConditions(r.Client, reqLogger, scaledObject, &conditions); err != nil {
 		return ctrl.Result{}, err
 	}
+
 	return ctrl.Result{}, err
 }
 

controllers/scaledobject_finalizer.go

@@ -3,6 +3,9 @@ package controllers
 import (
 	"context"
 
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+	corev1 "k8s.io/api/core/v1"
+
 	"github.com/go-logr/logr"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -54,6 +57,7 @@ func (r *ScaledObjectReconciler) finalizeScaledObject(logger logr.Logger, scaled
 	}
 
 	logger.Info("Successfully finalized ScaledObject")
+	r.Recorder.Event(scaledObject, corev1.EventTypeNormal, eventreason.ScaledObjectDeleted, "ScaledObject was deleted")
 	return nil
 }
 

controllers/triggerauthentication_controller.go

@@ -0,0 +1,58 @@
+package controllers
+
+import (
+	"context"
+
+	"github.com/go-logr/logr"
+	kedav1alpha1 "github.com/kedacore/keda/v2/api/v1alpha1"
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/client-go/tools/record"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+)
+
+// +kubebuilder:rbac:groups=keda.sh,resources=triggerauthentications;triggerauthentications/status,verbs="*"
+
+// TriggerAuthenticationReconciler reconciles a TriggerAuthentication object
+type TriggerAuthenticationReconciler struct {
+	Client   client.Client
+	Log      logr.Logger
+	Recorder record.EventRecorder
+}
+
+// Reconcile performs reconciliation on the identified TriggerAuthentication resource based on the request information passed, returns the result and an error (if any).
+func (r *TriggerAuthenticationReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
+	reqLogger := r.Log.WithValues("TriggerAuthentication.Namespace", req.Namespace, "TriggerAuthentication.Name", req.Name)
+
+	triggerAuthentication := &kedav1alpha1.TriggerAuthentication{}
+	err := r.Client.Get(context.TODO(), req.NamespacedName, triggerAuthentication)
+	if err != nil {
+		if errors.IsNotFound(err) {
+			return ctrl.Result{}, nil
+		}
+		reqLogger.Error(err, "Failed ot get TriggerAuthentication")
+		return ctrl.Result{}, err
+	}
+
+	if triggerAuthentication.GetDeletionTimestamp() != nil {
+		r.Recorder.Event(triggerAuthentication, corev1.EventTypeNormal, eventreason.TriggerAuthenticationDeleted, "TriggerAuthentication was deleted")
+		return ctrl.Result{}, nil
+	}
+
+	if triggerAuthentication.ObjectMeta.Generation == 1 {
+		r.Recorder.Event(triggerAuthentication, corev1.EventTypeNormal, eventreason.TriggerAuthenticationAdded, "New TriggerAuthentication configured")
+	}
+
+	return ctrl.Result{}, nil
+}
+
+// SetupWithManager initializes the TriggerAuthenticationReconciler instance and starts a new controller managed by the passed Manager instance.
+func (r *TriggerAuthenticationReconciler) SetupWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&kedav1alpha1.TriggerAuthentication{}, builder.WithPredicates(predicate.GenerationChangedPredicate{})).
+		Complete(r)
+}

go.sum

@@ -958,6 +958,7 @@ github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfV
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
+github.com/kedacore/keda v1.5.0 h1:c8xA1Vo3H7rPwFiWUX3CBXnjBSrbYDmUs9iEfDlf4bQ=
 github.com/kelseyhightower/envconfig v1.3.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
 github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
 github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=

main.go

@@ -129,6 +129,7 @@ func main() {
 		Log:               ctrl.Log.WithName("controllers").WithName("ScaledObject"),
 		Scheme:            mgr.GetScheme(),
 		GlobalHTTPTimeout: globalHTTPTimeout,
+		Recorder:          mgr.GetEventRecorderFor("scaledobject-controller"),
 	}).SetupWithManager(mgr); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "ScaledObject")
 		os.Exit(1)
@@ -138,10 +139,19 @@ func main() {
 		Log:               ctrl.Log.WithName("controllers").WithName("ScaledJob"),
 		Scheme:            mgr.GetScheme(),
 		GlobalHTTPTimeout: globalHTTPTimeout,
+		Recorder:          mgr.GetEventRecorderFor("scaledjob-controller"),
 	}).SetupWithManager(mgr); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "ScaledJob")
 		os.Exit(1)
 	}
+	if err = (&controllers.TriggerAuthenticationReconciler{
+		Client:   mgr.GetClient(),
+		Log:      ctrl.Log.WithName("controllers").WithName("TriggerAuthentication"),
+		Recorder: mgr.GetEventRecorderFor("triggerauthentication-controller"),
+	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "TriggerAuthentication")
+		os.Exit(1)
+	}
 	// +kubebuilder:scaffold:builder
 
 	setupLog.Info("Starting manager")

pkg/eventreason/eventreason.go

@@ -0,0 +1,67 @@
+/*
+Copyright 2020 The KEDA 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 eventreason
+
+const (
+	// ScaledObjectReady is for event when a new ScaledObject is ready
+	ScaledObjectReady = "ScaledObjectReady"
+
+	// ScaledJobReady is for event when a new ScaledJob is ready
+	ScaledJobReady = "ScaledJobReady"
+
+	// ScaledObjectCheckFailed is for event when ScaledObject validation check fails
+	ScaledObjectCheckFailed = "ScaledObjectCheckFailed"
+
+	// ScaledJobCheckFailed is for event when ScaledJob validation check fails
+	ScaledJobCheckFailed = "ScaledJobCheckFailed"
+
+	// ScaledObjectDeleted is for event when ScaledObject is deleted
+	ScaledObjectDeleted = "ScaledObjectDeleted"
+
+	// ScaledJobDeleted is for event when ScaledJob is deleted
+	ScaledJobDeleted = "ScaledJobDeleted"
+
+	// KEDAScalersStarted is for event when scalers watch started for ScaledObject or ScaledJob
+	KEDAScalersStarted = "KEDAScalersStarted"
+
+	// KEDAScalersStopped is for event when scalers watch was stopped for ScaledObject or ScaledJob
+	KEDAScalersStopped = "KEDAScalersStopped"
+
+	// KEDAScalerFailed is for event when a scaler fails for a ScaledJob or a ScaledObject
+	KEDAScalerFailed = "KEDAScalerFailed"
+
+	// KEDAScaleTargetActivated is for event when the scale target of ScaledObject was activated
+	KEDAScaleTargetActivated = "KEDAScaleTargetActivated"
+
+	// KEDAScaleTargetDeactivated is for event when the scale target for ScaledObject was deactivated
+	KEDAScaleTargetDeactivated = "KEDAScaleTargetDeactivated"
+
+	// KEDAScaleTargetActivationFailed is for event when the activation the scale target for ScaledObject fails
+	KEDAScaleTargetActivationFailed = "KEDAScaleTargetActivationFailed"
+
+	// KEDAScaleTargetDeactivationFailed is for event when the deactivation of the scale target for ScaledObject fails
+	KEDAScaleTargetDeactivationFailed = "KEDAScaleTargetDeactivationFailed"
+
+	// KEDAJobsCreated is for event when jobs for ScaledJob are created
+	KEDAJobsCreated = "KEDAJobsCreated"
+
+	// TriggerAuthenticationDeleted is for event when a TriggerAuthentication is deleted
+	TriggerAuthenticationDeleted = "TriggerAuthenticationDeleted"
+
+	// TriggerAuthenticationAdded is for event when a TriggerAuthentication is added
+	TriggerAuthenticationAdded = "TriggerAuthenticationAdded"
+)

pkg/scaling/executor/scale_executor.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 
+	"k8s.io/client-go/tools/record"
+
 	"github.com/go-logr/logr"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -30,15 +32,17 @@ type scaleExecutor struct {
 	scaleClient      *scale.ScalesGetter
 	reconcilerScheme *runtime.Scheme
 	logger           logr.Logger
+	recorder         record.EventRecorder
 }
 
 // NewScaleExecutor creates a ScaleExecutor object
-func NewScaleExecutor(client client.Client, scaleClient *scale.ScalesGetter, reconcilerScheme *runtime.Scheme) ScaleExecutor {
+func NewScaleExecutor(client client.Client, scaleClient *scale.ScalesGetter, reconcilerScheme *runtime.Scheme, recorder record.EventRecorder) ScaleExecutor {
 	return &scaleExecutor{
 		client:           client,
 		scaleClient:      scaleClient,
 		reconcilerScheme: reconcilerScheme,
 		logger:           logf.Log.WithName("scaleexecutor"),
+		recorder:         recorder,
 	}
 }
 

pkg/scaling/executor/scale_jobs.go

@@ -5,6 +5,8 @@ import (
 	"sort"
 	"strconv"
 
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+
 	"github.com/go-logr/logr"
 	batchv1 "k8s.io/api/batch/v1"
 	corev1 "k8s.io/api/core/v1"
@@ -108,6 +110,7 @@ func (e *scaleExecutor) createJobs(logger logr.Logger, scaledJob *kedav1alpha1.S
 		}
 	}
 	logger.Info("Created jobs", "Number of jobs", scaleTo)
+	e.recorder.Eventf(scaledJob, corev1.EventTypeNormal, eventreason.KEDAJobsCreated, "Created %d jobs", scaleTo)
 }
 
 func (e *scaleExecutor) isJobFinished(j *batchv1.Job) bool {