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Scale applications based on AWS CloudWatch.

Availability: v1.0+ Maintainer: Community

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Trigger Specification

This specification describes the aws-cloudwatch trigger that scales based on a AWS CloudWatch.

triggers:
- type: aws-cloudwatch
  metadata:
    # Required: namespace
    namespace: AWS/SQS
    # Required: Dimension Name
    dimensionName: QueueName
    dimensionValue: keda
    metricName: ApproximateNumberOfMessagesVisible
    targetMetricValue: "2"
    minMetricValue: "0"
    # Required: region
    awsRegion: "eu-west-1"
    # Optional: AWS Access Key ID, can use TriggerAuthentication as well
    awsAccessKeyID: AWS_ACCESS_KEY_ID # default AWS_ACCESS_KEY_ID
    # Optional: AWS Secret Access Key, can use TriggerAuthentication as well
    awsSecretAccessKey: AWS_SECRET_ACCESS_KEY # default AWS_SECRET_ACCESS_KEY
    identityOwner: pod | operator # Optional. Default: pod

Parameter list:

  • identityOwner - Receive permissions on the CloudWatch via Pod Identity or from the KEDA operator itself (see below).

When identityOwner set to operator - the only requirement is that the Keda operator has the correct IAM permissions on the CloudWatch. Additional Authentication Parameters are not required.

Authentication Parameters

These parameters are relevant only when identityOwner is set to pod.

You can use TriggerAuthentication CRD to configure the authenticate by providing either a role ARN or a set of IAM credentials.

Pod identity based authentication:

  • podIdentity.provider needs to be set to either aws-kiam or aws-eks on the TriggerAuthentication and the pod/service account must be configured correctly for your pod identity provider.

Role based authentication:

  • awsRoleArn - Amazon Resource Names (ARNs) uniquely identify AWS resource

Credential based authentication:

  • awsAccessKeyID - Id of the user
  • awsSecretAccessKey - Access key for the user to authenticate with

The user will need access to read data from AWS CloudWatch.

Example

apiVersion: v1
kind: Secret
metadata:
  name: test-secrets
data:
  AWS_ACCESS_KEY_ID: <user-id>
  AWS_SECRET_ACCESS_KEY: <key>
--- 
apiVersion: keda.k8s.io/v1alpha1
kind: TriggerAuthentication
metadata:
  name: keda-trigger-auth-aws-credentials
  namespace: keda-test
spec:
  secretTargetRef:
  - parameter: awsAccessKeyID     # Required.
    name: keda-aws-secrets        # Required.
    key: AWS_ACCESS_KEY_ID        # Required.
  - parameter: awsSecretAccessKey # Required.
    name: keda-aws-secrets        # Required.
    key: AWS_SECRET_ACCESS_KEY    # Required.
---
apiVersion: keda.k8s.io/v1alpha1
kind: ScaledObject
metadata:
  name: aws-cloudwatch-queue-scaledobject
  namespace: keda-test
  labels:
    test: nginx-deployment
spec:
  scaleTargetRef:
    deploymentName: nginx-deployment
  triggers:
  - type: aws-cloudwatch
    metadata:
      namespace: AWS/SQS
      dimensionName: QueueName
      dimensionValue: keda
      metricName: ApproximateNumberOfMessagesVisible
      targetMetricValue: "2"
      minMetricValue: "0"
      awsRegion: "eu-west-1"
    authenticationRef:
      name: keda-trigger-auth-aws-credentials


Currently available scalers for KEDA