How do I set ARR affinity for an Azure cloud service?

Question

I have a web role in a cloud service with 2 instances.

I have a function that creates files in one instance and switches to the other mid-function, causing 404 errors because it can't find the files.

In Azure Web Apps, there is a setting in the Azure Portal to turn ARR Affinity on or off. I don't see anything like that in Azure Cloud Services.

I'm no Azure expert, but this sounds lika a common cluster setup. I.e. you could store the files that are created on a network drive that is mounted on both servers. — Markus
The files are created using third party software, so I can't control where the files go or even see the code to change it. — ChasetopherB

Snoy Snoy · Accepted Answer · 2018-02-06T05:00:15

For cloud services, you'll need to install it manually by yourself on your startup task of csdef file. ARR is not installed by default for IIS.

You can refer to this article for more information (from step 4).