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Oct 13, 2025 by wbrum.org 29 views

AzureRM Function App Flex Consumption: https_only is not supported

In this article, we will explore the issue of the https_only parameter not being supported in the azurerm_function_app_flex_consumption resource in AzureRM provider version 4.22.0. We will discuss the error message, the expected behavior, and the actual behavior when trying to deploy a function with the HTTPS only feature.

Yes, there is an existing issue for this. The documentation of azurerm_function_app_flex_consumption states that the parameter https_only can be configured. However, when doing so, using the latest provider version (4.22.0 at this time) shows an error.

The community note is as follows:

Please vote on this issue by adding a :thumbsup: reaction to the original issue to help the community and maintainers prioritize this request
Please do not leave comments along the lines of "+1", "me too" or "any updates", they generate extra noise for issue followers and do not help prioritize the request
If you are interested in working on this issue or have submitted a pull request, please leave a comment and review the contribution guide to help.

The Terraform version used is 1.11.1.

The AzureRM provider version used is 4.22.0.

The affected resource is azurerm_function_app_flex_consumption.

The Terraform configuration file is as follows:

resource "azurerm_function_app_flex_consumption" "this" {
  name                        = local.function_name
  resource_group_name         = azurerm_resource_group.this.name
  location                    = var.region
  service_plan_id             = azurerm_service_plan.this.id
  runtime_name                = "powershell"
  runtime_version             = "7.4"
  storage_container_type      = "blobContainer"
  storage_container_endpoint  = "${azurerm_storage_account.this.primary_blob_endpoint}${azurerm_storage_container.this.name}"
  storage_authentication_type = "StorageAccountConnectionString"
  storage_access_key          = azurerm_storage_account.this.primary_access_key

  webdeploy_publish_basic_authentication_enabled = true

  https_only = true

  site_config {
    minimum_tls_version = "1.3"

    cors {
      allowed_origins = ["https://portal.azure.com"]
    }
  }

  tags = var.default_tags
}

The debug output/panic output is as follows:

Initializing plugins and modules...
╷
│ Error: Unsupported argument
│
│   on function.tf line 50, in resource "azurerm_function_app_flex_consumption" "this":
│   50:   https_only                                     = true
│
│ An argument named "https_only" is not expected here.

The expected behavior is to deploy the function with the HTTPS only feature.

The actual behavior is failing at the plan stage.

To reproduce this issue, follow these steps:

Create a new Terraform configuration file with the azurerm_function_app_flex_consumption resource.
Set the https_only parameter to true.
Run terraform plan to see the error message.

No important factoids are available for this issue.

No references are available for this issue.

In conclusion, the https_only parameter is not supported in the azurerm_function_app_flex_consumption resource in AzureRM provider version 4.22.0. This issue is causing the Terraform plan to fail when trying to deploy a function with the HTTPS only feature. To resolve this issue, a pull request is needed to update the AzureRM provider to support the https_only parameter.
AzureRM Function App Flex Consumption: https_only is not supported - Q&A

In our previous article, we discussed the issue of the https_only parameter not being supported in the azurerm_function_app_flex_consumption resource in AzureRM provider version 4.22.0. In this article, we will provide a Q&A section to help you better understand the issue and its implications.

A: The https_only parameter is a feature in Azure Functions that allows you to deploy a function with HTTPS only. This means that the function will only be accessible over HTTPS and not over HTTP.

A: The https_only parameter is not supported in the azurerm_function_app_flex_consumption resource because it is a feature that is not yet implemented in the AzureRM provider. The provider is still in development, and this feature is not yet available.

A: The implications of not supporting the https_only parameter are that you will not be able to deploy a function with HTTPS only using the azurerm_function_app_flex_consumption resource. This means that your function will be accessible over both HTTP and HTTPS, which may not be desirable in all cases.

A: There are a few ways to work around this issue:

Use the Azure portal: You can use the Azure portal to deploy a function with HTTPS only. This will allow you to access the function over HTTPS only.
Use a different resource: You can use a different resource, such as the azurerm_function_app resource, which supports the https_only parameter.
Wait for the AzureRM provider to be updated: You can wait for the AzureRM provider to be updated to support the https_only parameter.

A: If you are interested in contributing to the AzureRM provider to get this feature implemented, you can follow these steps:

Review the contribution guide: Review the contribution guide to understand the process of contributing to the AzureRM provider.
Create a pull request: Create a pull request to add the https_only parameter to the azurerm_function_app_flex_consumption resource.
Wait for the pull request to be reviewed and merged: Wait for the pull request to be reviewed and merged by the AzureRM provider maintainers.

A: If you need help with this issue, you can:

Check the AzureRM provider documentation: Check the AzureRM provider documentation to see if there are any known issues or workarounds.
Check the AzureRM provider community: Check the AzureRM provider community to see if anyone else has encountered this issue and has a solution.
Reach out to the AzureRM provider maintainers: Reach out to the AzureRM provider maintainers to ask for help with this issue.

In conclusion, the https_only parameter is not supported in the azurerm_function_app_flex_consumption resource in AzureRM provider version 4.22.0. This issue is causing the Terraform plan to fail when trying to deploy a function with the HTTPS only feature. We hope that this Q&A article has helped you better understand the issue and its implications. If you have any further questions, please don't hesitate to reach out.