[ACA] Allow setting of Development stack for containers

[Fabian-Schmidt]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I want to set Development stack for an Azure Container App.

It is required to set autoConfigureDataProtection to support easier Autoscaling. See Autoscaling considerations.

Describe the solution you'd like

Ability to configure runtime setting for ACA.

Additional context

See Update Runtime to add DotNet support for schema details.

The bicep for Microsoft.App/containerApps@2024-03-01 must include:

resource backend 'Microsoft.App/containerApps@2024-03-01' = {
  name: 'backend'
  location: location
  properties: {
    configuration: {
[...]
      runtime: {
        dotnet:{
          autoConfigureDataProtection: true
        }
      }

[eerhardt]

@tg-msft @m-nash - it looks like the https://www.nuget.org/packages/Azure.Provisioning.AppContainers doesn't have support for this property. Should this issue be transfered to https://github.com/azure/azure-sdk-for-net/?

[Fabian-Schmidt]

Is there no workaround to just add bicep values if the template owner forget to add it or made a mistake?

This seem like a big flaw that I cannot add arbitrary bicep properties.

Here is my hack to set this for reference:

.PublishAsAzureContainerApp((module, app) =>
{
  app.ResourceVersion = "2024-10-02-preview";
  var dotnet_autoConfigureDataProtection = app.Configuration
      .GetType()
      .GetMethod("DefineProperty", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic)
      !.MakeGenericMethod(typeof(bool))
      .Invoke(app.Configuration, ["DotnetAutoConfigureDataProtection", (string[]?)["runtime", "dotnet", "autoConfigureDataProtection"], false, false, false, null, null])
      as BicepValue<bool>;
  
  dotnet_autoConfigureDataProtection!.Assign(true);
})

I am not sure where the benefit in setting the DefineProperty method as protected.