Google Cloud Platform Cloud Tasks

Google Cloud Platform Cloud Tasks ^Latest

Scale applications based on Google Cloud Platform Cloud Tasks.

Availability: v2.12+ Maintainer: Community

Trigger Specification

This specification describes the gcp-cloudtasks trigger for Google Cloud Platform Cloud Tasks.

triggers:
- type: gcp-cloudtasks
  metadata:
    value: "5" # Optional - Default is 100
    activationValue: "10.5" # Optional - Default is 0
    filterDuration: '1' # Optional - Default is 2
    queueName: "myqueue" # Required
    projectID: "myproject" # Required, the project where the queue resides
    credentialsFromEnv: GOOGLE_APPLICATION_CREDENTIALS_JSON # Required

The Google Cloud Platform (GCP) Cloud Tasks trigger allows you to scale based on the number of tasks queued in you queue.

The credentialsFromEnv property maps to the name of an environment variable in the scale target (scaleTargetRef) that contains the service account credentials (JSON). KEDA will use those to connect to Google Cloud Platform and collect the required stack driver metrics in order to read the number of messages in the Cloud Task queue.

value - Target value for the scaler. (Default: 100, Optional, This value can be a float)
activationValue - Target value for activating the scaler. Learn more about activation here. (Default: 0, Optional, This value can be a float)
queueName defines the queue that should be monitored.
projectID defines the GCP project where the queue that should be monitored resides.
filterDuration - Duration (in minutes) for filtering metrics. (Default: 2)

Authentication Parameters

You can use TriggerAuthentication CRD to configure the authenticate by providing the service account credentials in JSON.

Credential based authentication:

GoogleApplicationCredentials - Service account credentials in JSON.

Example

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: cloudtasks-scaledobject
  namespace: keda-cloudtasks-test
spec:
  scaleTargetRef:
    name: keda-cloudtasks-go
  triggers:
  - type: gcp-cloudtasks
    metadata:
      activationValue: "5"
      projectID: "myproject" # Required
      queueName: "myqueue" # Required
      credentialsFromEnv: GOOGLE_APPLICATION_CREDENTIALS_JSON # Required

Example using TriggerAuthentication

apiVersion: keda.sh/v1alpha1
kind: TriggerAuthentication
metadata:
  name: keda-trigger-auth-gcp-credentials
spec:
  secretTargetRef:
  - parameter: GoogleApplicationCredentials
    name: cloudtasks-secret        # Required. Refers to the name of the secret
    key: GOOGLE_APPLICATION_CREDENTIALS_JSON       # Required.
---
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: cloudtasks-scaledobject
spec:
  scaleTargetRef:
    name: keda-cloudtasks-go
  triggers:
  - type: gcp-cloudtasks
    authenticationRef:
      name: keda-trigger-auth-gcp-credentials
    metadata:
      activationValue: "5"
      projectID: "myproject" # Required
      queueName: "myqueue" # Required

Identity based authentication:

You can also use TriggerAuthentication CRD to configure the authentication using the associated service account of the running machine in Google Cloud. You only need to create a TriggerAuthentication as this example, and reference it in the ScaledObject. ClusterTriggerAuthentication can also be used if you intend to use it globally in your cluster.

Example using TriggerAuthentication with GCP Identity

apiVersion: keda.sh/v1alpha1
kind: TriggerAuthentication
metadata:
  name: keda-trigger-auth-gcp-credentials
spec:
  podIdentity:
    provider: gcp
---
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: cloudtasks-scaledobject
spec:
  scaleTargetRef:
    name: keda-cloudtasks-go
  triggers:
  - type: gcp-cloudtasks
    authenticationRef:
      name: keda-trigger-auth-gcp-credentials
    metadata:
      activationValue: "5"
      projectID: "myproject" # Required
      queueName: "myqueue" # Required

Example using ClusterTriggerAuthentication with GCP Identity

apiVersion: keda.sh/v1alpha1
kind: ClusterTriggerAuthentication
metadata:
  name: keda-clustertrigger-auth-gcp-credentials
spec:
  podIdentity:
    provider: gcp
---
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: cloudtasks-scaledobject
spec:
  scaleTargetRef:
    name: keda-cloudtasks-go
  triggers:
  - type: gcp-cloudtasks
    authenticationRef:
      name: keda-clustertrigger-auth-gcp-credentials
      kind: ClusterTriggerAuthentication
    metadata:
      activationValue: "5"
      projectID: "myproject" # Required
      queueName: "myqueue" # Required