Event-driven Autoscaling with KEDA

KEDA (Kubernetes Event-driven Autoscaling) is a Kubernetes component that allows you to scale pods based on external event sources like Kafka, RabbitMQ, AWS SQS, Prometheus metrics, etc.

Key Concepts:

• Scalers: Define the event source (e.g., queue length)
• ScaledObject: Maps the deployment and scaler

Example ScaledObject:

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: queue-scaler
spec:
  scaleTargetRef:
    name: worker
  triggers:
  - type: rabbitmq
    metadata:
      queueName: jobs
      host: RabbitMQConnection

Install KEDA:

kubectl apply -f https://github.com/kedacore/keda/releases/latest/download/keda-operator.yaml