Durable Functions Recipe
Orchestration workflows with Durable Task Scheduler as the backend.
Template Selection
Resource filter: durable
Discover templates via MCP or CDN manifest where resource == "durable" and language matches user request.
Key Concept
Uses Durable Task Scheduler (DTS) — a fully managed backend for state persistence. Do NOT use Azure Storage queues/tables.
See Durable Task Scheduler reference for backend configuration details.
Troubleshooting
Orchestration Fails to Start
Cause: Durable Task Scheduler (DTS) backend not provisioned or connection misconfigured.
Solution: Verify the DTS resource exists and the function app has the Durable Task Scheduler Worker role. Do NOT use Azure Storage queues/tables as backend.
UAMI Connection Issues
Cause: Missing or incorrect Durable Task Scheduler connection string.
Solution: DTS uses a connection string format (not the __ suffix pattern). Set these app settings:
DURABLE_TASK_SCHEDULER_CONNECTION_STRING:Endpoint=<scheduler-endpoint>;Authentication=ManagedIdentity;ClientID=<client-id>TASKHUB_NAME: name of the task hub
For system-assigned identity, omit ClientID:
Endpoint=<scheduler-endpoint>;Authentication=ManagedIdentity
The identity must have the Durable Task Data Contributor role on the scheduler or task hub resource. See DTS identity auth for identity-based config — refer to the "Configure managed identity" section for connection string and role assignment details.
Eval
| Path | Description |
|---|---|
| eval/summary.md | Evaluation summary |
| eval/python.md | Python evaluation results |