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I have on-premise azure functions create via the Azure Functions Runtime. How do I call these functions from a logic apps resource on the cloud. Based on what I have been reading I need to install the on-premise data gateway first. This will be the way logic apps will communicate to on-premise resources. However this communication seems to only be possible for local data sources sqlserver, biztalk server etc. How exactly do i angagne with my local functions. Is there a connector for this?

user2503480
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2 Answers2

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You can expose your local machine using a tool such as:

  • Ngrok
  • Localtunnel
  • Serveo
  • Teleconsole
  • Pagekite

and use the provided url as a proxy to call your local function. So your Logic App will call one of those services, which will route the request to your function.

Thiago Custodio
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I assume your functions are HTTP triggered.

Calling on-prem HTTP resources directly from Logic Apps can be done, as you suggested, via the on-premises data gateway. You just need to create a custom connector for this.

There are tutorials under the official documentation, but as an external blog this one explains the required steps (for SOAP endpoint): https://www.codit.eu/blog/connecting-to-on-premise-http-endpoints-from-logic-app/

Esa Vanhanen-Varho
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  • Unortunately it looks HTTP triggered functions are not available in Azure Functions Runtime (https://github.com/MicrosoftDocs/azure-docs/issues/11175). But thanks for the custom connector tip. – user2503480 Jan 24 '20 at 21:01
  • Sorry, I had forgotten that completely as I haven't got similar case myself in production. Thanks for the reminder! On-prem connections yes, but not functions. – Esa Vanhanen-Varho Jan 25 '20 at 11:40
  • Although, seems that with KEDA you can also publish HTTP triggers: https://learn.microsoft.com/en-us/azure/azure-functions/functions-kubernetes-keda#http-trigger-support – Esa Vanhanen-Varho Jan 25 '20 at 11:50