Add target based scaling support for MSSQL

microsoft / durabletask-mssql

Microsoft SQL storage provider for Durable Functions and the Durable Task Framework

MIT License

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Closed bachuv closed 1 month ago

bachuv commented 1 year ago

This PR adds support for target based scaling. It builds upon https://github.com/Azure/azure-functions-durable-extension/pull/2452. This PR is in draft mode since it hasn't been tested E2E yet.

Changes:

[x] Add SqlMetricsProvider and move GetMetricsAsync() code from SqlScaleMonitor here
[x] Add SqlTargetScaler (implements ITargetScaler)
[x] Override TryGetTargetScaler in SqlDurabilityProvider
[x] Add unit tests
[ ] E2E testing

cgillum commented 1 month ago

Quick note: I've successfully tested these changes in the Azure Functions SCv3 integration test code.