I try to create azure function app, but I can't select Linux OS, why?

Question

Whatever runtime stack I choose, .NET, python, etc, this Linux button is always gray, why?

My current Resource Group is Linux so I can't create a Function at all.

I'm totally new to this and I'm still in free trial.
I thought Azure Functions are free for low usage. And because of that, I can't even choose "consumption" plan.

Answer 1

I'll answer my own question, I also failed to create one from Visual Studio, and this time I have error message and a link to refer to.

https://github.com/Azure/Azure-Functions/wiki/Creating-Function-Apps-in-an-existing-Resource-Group

This is the link and now I understand why is this happening better. I already have a resource group and a web app, it's not allowed to create another function app in this resource group.

Answer 2

When you create an azure function make sure it is v2 or v3 azure function which uses .net core which is cross platform. v1 uses the .net framework which only works on windows

Answer 3

Sorry I was using Visual Studio to create the function. I was able to create one with my subscription