Support for linux_web_app Storage Mount add "Deployment Slot Setting"

[gerhard-strauss-jambit]

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Description

Storage Account Mounts in the Azure App Service can be pinned to Slots ("Deployment Slot Setting" Checkbox in the Azure Portal)
Currently this is not supported by the linux_web_app Resource and changes in the Azure Portal are completly ignored.

App Settings and Connection String can be pinned to Slots. to do that, their Name have to be added to the "sticky_settings" Block. this settings could be expanded to support the Storage Mounts

New or Affected Resource(s)/Data Source(s)

linux_web_app

Potential Terraform Configuration

resource "azurerm_linux_web_app" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

  site_config {}

  storage_account {
    name           = "examplemount"
    account_name   = "examplestorageaccount",
    access_key     = "not_an_actual_key",
    container_name = "example-container",
    mount_path     = "/opt/somedir"
    type           = "AzureBlob"
  }

  sticky_settings {
    storage_account_names ["examplemount"]
  }
}

References

https://learn.microsoft.com/en-us/azure/app-service/configure-connect-to-azure-storage?tabs=basic%2Cportal&pivots=container-linux#mount-storage-to-linux-container

[rcskosir]

Thank you for taking the time to open this feature request!