Azure Container Apps: KEDA and Dapr Managed

Azure Container Apps (ACA) is the “Serverless Containers” offering we’ve been waiting for. Built on Kubernetes but hiding the cluster, it integrates **KEDA** (for event-driven scaling) and **Dapr** (for building blocks) natively.

Scaling to Zero

Unlike App Service, ACA can scale to 0 replicas when no events are processing, saving money.

graph LR
    Queue[Service Bus Queue] -->|Message Count > 0| KEDA
    KEDA -->|Scale Out| Replica1[Container Replica 1]
    Replica1 -->|Process| Queue
    
    style KEDA fill:#E1F5FE

Dapr Integration

Enable Dapr with a simple flag. No Helm charts needed.

az containerapp create   --name my-app   --enable-dapr   --dapr-app-id my-app   --dapr-app-port 80

Key Takeaways

• Perfect for Microservices that don’t need full K8s control.
• Supports **Revisions** for Blue/Green deployments out of the box.