📢 This external scaler only supports KEDA v1.x and is no longer maintained. If you want to scale applications using Durable Functions, we recommend using the SQL backend with our MS SQL scaler.
KEDA Durable Functions Scaler is an extension that enables autoscaling of Durable Functions deployed on Kubernetes cluster. This extension uses External Scaler Support for KEDA.
The key features of KEDA Durable Functions Scaler are:
- Intelligent Auto Scaling
- One-liner deployment using Helm
KEDA supports multiple scalers. As a part of the scalers, this project support Durable Functions Scaler for KEDA. You can deploy Durable Functions with auto scale feature on Kubernetes.
KEDA Durable Functions Scaler works as a gRPC server of the External Scaler Support.
- gRPC services with ASP.NET Core
- Watch Control/Worker queues by DurableTask and use Scale Recommendation
- Get the current worker count from Kubernetes API Server
Currently, KEDA Durable Scaler can't make functions scale down to zero. The minimum pod number is one. Durable Scaler needs to send data to the control/worker queue. To achieve this behavior, we need to separate the HTTP and non-HTTP deployments. However, the feature seems not working. We need to wait until this issue is fixed.
- Add configuration for enabling only HTTP or only non-HTTP functions #4412
- Pods doesn't scale in to zero #17
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