Azure Application Gateway: Prevent a server from receiving new requests

Question

I'm setting up API servers behing an Application Gateway on Azure. I'd like to roll out updates to each server one by one. However, before I do that, I'd like to ensure that all in-progress requests on a server are fully processed and no new requests can be received by the server. This is to prevent closing HTTP connections abruptly while the customer waits for a response.

So, suppose I have 5 servers behind a gateway and I like to update server #5. The flow I'd like to implement is as follows:

• Flag server #5 so that it does not receive any new requests
• Wait until server #5 processes all pending requests
• Update server #5
• Make it available in the app pool

Is this possible with Application Gateway?

question from:https://stackoverflow.com/questions/65645494/azure-application-gateway-prevent-a-server-from-receiving-new-requests

Answer 1

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