Steps and procedure to allow Azure Function to reach the OnPremise servers via Express Route circuit?

Question

What are the steps and procedures I need to do in order to allow the Azure Functions [[https://learn.microsoft.com/en-us/azure/azure-functions/functions-overview] to reach my OnPremise servers?

The Azure Express Route circuit has been configured to allow the connection to my OnPremise servers.

Answer 1

@EnterpriseArchitect ,

As mentioned by Sudipta, you can create and deploy App service Environment in the existing vnet however it is a costlier option. If you would only be running a couple of functions and if you are looking for a cheaper option, you can simply create the Function in a dedicated app service plan or premium plan and integrate with regional vnet where you have configured expressroute.

The below article has all the steps and details you need,

https://learn.microsoft.com/en-us/azure/azure-functions/functions-networking-options?tabs=azure-cli

Hope this helps! Feel free to reach out to me if you have any queries or concerns.

Answer 2

An Azure Function can be deployed on an App Service Environment. The App Service Environment is deployed on your own VNET which can have access to on-prem resources via ExpressRoute. Follow the steps provided in the following link to configure a VNet with express route :

[https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-portal-resource-manager