Can't deploy Linux web app

The following template generates a Linux ARM template that is invalid:

let template =
    let myWebApp = webApp {
        name "mysuperwebappisaac"
        sku WebApp.Sku.F1
        operating_system Linux
        runtime_stack DotNetCore22
    }

    arm {
        location NorthEurope
        add_resource myWebApp
    }

The service host is deployed, but the web app is not, with an error that the LinuxFxVersion is invalid (in the generated template it’s DOTNETCORE|2.2).

What do you think this is @Dzoukr ?

[isaacabraham]

@viktorvan @Dzoukr an you both check now? I’ve made some changes to the template generation which I think are now working. Not yet released but it’s in master

[Dzoukr]

Hi @isaacabraham,

prepare for a good laugh. I tried and failed with the same error. Then I tried to create a same configuration manually and copy some parts to locally generated ARM template. After some desperate guesses, I realized that output for Microsoft.Web/serverfarms is slightly different.

Our output:

{
  "apiVersion": "2018-02-01",
  "kind": "linux",
  "location": "northeurope",
  "name": "mysuperwebapproman-plan",
  "properties": {
	"name": "mysuperwebapproman-plan",
	"perSiteScaling": false,
	"reserved": false
  },
  "sku": {
	"capacity": 1,
	"name": "F1",
	"size": "0",
	"tier": "Free"
  },
  "type": "Microsoft.Web/serverfarms"
}

the portal template (manual clicked resource) output:

{
  "apiVersion": "2018-11-01",
  "name": "mysuperwebapproman-plan",
  "type": "Microsoft.Web/serverfarms",
  "location": "northeurope",
  "kind": "linux",
  "tags": null,
  "dependsOn": [],
  "properties": {
	"name": "mysuperwebapproman-plan",
	"workerSize": "0",
	"workerSizeId": "0",
	"numberOfWorkers": "1",
	"reserved": true,
	"hostingEnvironment": ""
  },
  "sku": {
	"Tier": "Free",
	"Name": "F1"
  }
}

The second one sort of works - returns bad request but at least creates resource on Azure. I tried to investigate (= change randomly things and pray) and realized, that deleting section resources from webApp section containing

"resources": [
	{
	  "apiVersion": "2016-08-01",
	  "dependsOn": [
		"mysuperwebapproman"
	  ],
	  "name": "Microsoft.ApplicationInsights.AzureWebSites",
	  "properties": {},
	  "type": "siteextensions"
	}
]

will make it 100% work.

So here is the investigation summary:

1. apiVersion is now 2018-11-01
2. Sku properties for Microsoft.Web/serverfarms now with first letter uppercase make it work. Why? Only God and Microsoft know.
3. Having AI site extension in resources array for Microsoft.Web/sites will make it fail.
4. And just to make it more fun - everything works when you choose Windows OS.

(╯°□°)╯︵ ┻━┻