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Events

Kubernetes Events emitted by KEDA

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Kubernetes Events emitted by KEDA

KEDA emits the following Kubernetes Events:

EventTypeDescriptionCloudEvent Support
ScaledObjectReadyNormalOn the first time a ScaledObject is ready, or if the previous ready condition status of the object was Unknown or FalseYES
ScaledJobReadyNormalOn the first time a ScaledJob is ready, or if the previous ready condition status of the object was Unknown or FalseNO
ScaledObjectCheckFailedWarningIf the check validation for a ScaledObject failsYES
ScaledJobCheckFailedWarningIf the check validation for a ScaledJob failsNO
ScaledObjectDeletedNormalWhen a ScaledObject is deleted and removed from KEDA watchNO
ScaledJobDeletedNormalWhen a ScaledJob is deleted and removed from KEDA watchNO
KEDAScalersStartedNormalWhen Scalers watch loop have started for a ScaledObject or ScaledJobNO
KEDAScalersStoppedNormalWhen Scalers watch loop have stopped for a ScaledObject or a ScaledJobNO
KEDAScalerFailedWarningWhen a Scaler fails to create or check its event sourceNO
KEDAScaleTargetActivatedNormalWhen the scale target (Deployment, StatefulSet, etc) of a ScaledObject is scaled to 1NO
KEDAScaleTargetDeactivatedNormalWhen the scale target (Deployment, StatefulSet, etc) of a ScaledObject is scaled to 0NO
KEDAScaleTargetActivationFailedWarningWhen KEDA fails to scale the scale target of a ScaledObject to 1NO
KEDAScaleTargetDeactivationFailedWarningWhen KEDA fails to scale the scale target of a ScaledObject to 0NO
KEDAJobsCreatedNormalWhen KEDA creates jobs for a ScaledJobNO
TriggerAuthenticationAddedNormalWhen a new TriggerAuthentication is addedNO
TriggerAuthenticationDeletedNormalWhen a TriggerAuthentication is deletedNO
ClusterTriggerAuthenticationAddedNormalWhen a new ClusterTriggerAuthentication is addedNO
ClusterTriggerAuthenticationDeletedNormalWhen a ClusterTriggerAuthentication is deletedNO

CloudEvent Support (Experimental)

Subscribing to events with CloudEventSource

CloudEventSource resource can be used in KEDA for subscribing to events that are emitted to the user’s defined CloudEvent sink.

📝 Event will be emitted to both Kubernetes Events and CloudEvents Destination if CloudEventSource resource is created.

Here is a the schema of the CloudEventSource CRD:

apiVersion: eventing.keda.sh/v1alpha1
kind: CloudEventSource
metadata:
  name: {cloud-event-name}
spec:
  clusterName: {cluster-name} #Optional. Will be used in the source/subject to specify where the event comes from. The default value is 'kubernetes-default' and it can also be set during the installation of KEDA with --k8sClusterName. This one will overwrite others if set.
  destination:
    http:
      uri: http://foo.bar

In general, an event emitted by KEDA would fundamentally come down to the following structure:

{
    "specversion" : "1.0",
    "type" : "com.cloudeventsource.keda",
    "source" : "/{cluster-name}/{namespace}/keda",
    "subject" : "/{cluster-name}/{namespace}/workload/{scaledobject-name}",
    "id" : "<guid>",
    "time" : "2018-04-05T17:31:00Z",
    "datacontenttype" : "application/json",
    "data" : {
      "reason":"<event-reason>",
      "message":"<event-message>"
   }
}

Event Sinks

There will be multiple types of destination to emit KEDA events to.

Here is an overview of the supported destinations:

HTTP endpoint 

  destination:
    http:
      uri: http://foo.bar  #An http endpoint that can receive cloudevent