eventgrid_extension exists on function but displays null value for event_grid_extension_config_key

[srjennings]

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Terraform (and AzureRM Provider) Version

TF Version: 0.15.5
AzureRM Version: 2.76.0

Affected Resource(s)

Data Source:

• azurerm_function_app_host_keys

Terraform Configuration Files

data "azurerm_function_app_host_keys" "func_apphostkeys" {
  name                = "functionname"
  resource_group_name = "resourcegroupname"
}

Debug Output

Debug output wasn't helpful. Issue was found in state file.

STATE EXCERPT:

    {
      "mode": "data",
      "type": "azurerm_function_app_host_keys",
      "name": "func_apphostkeys",
      "provider": "provider[\"registry.terraform.io/hashicorp/azurerm\"]",
      "instances": [
        {
          "schema_version": 0,
          "attributes": {
            "default_function_key": "SANITIZED==",
            **"event_grid_extension_config_key": "",** <~~~~~ NULL VALUE IS INCORRECT
            "id": "/subscriptions/SANITIZED/resourceGroups/SANITIZED/providers/Microsoft.Web/sites/functionname",
            "master_key": "SANITIZED==",
            "name": "functionname",
            "primary_key": "SANITIZED==",
            "resource_group_name": "resourcegroupname,
            "timeouts": null
          },
          "sensitive_attributes": []
        }
      ]
    }

Panic Output

N/A

Expected Behaviour

Grab the eventgrid_extension key.

Actual Behaviour

event_grid_extension_config_key is "" in the state file.

Steps to Reproduce

1. terraform plan

Important Factoids

N/A

References

• PR azurerm_function_app_host_keys - support for event_grid_extension_config_key #10823

[srjennings]

I am not a Go developer but I see the following piece of code: https://github.com/hashicorp/terraform-provider-azurerm/blob/b44ea51c13981790f575c04d0d79eff94639f71f/internal/services/web/function_app_host_keys_data_source.go#:~:text=eventgridextensionconfig_extension

I think the reference is simply incorrect. I'd make a PR but may not have time right away to do so.

Running the following command in the AZ CLI returns a different key:

az rest \
--method post \
--uri /subscriptions/SANITIZED/resourceGroups/SANITIZED/providers/Microsoft.Web/sites/functionname/host/default/listkeys?api-version=2019-08-01 \
--query systemKeys

[srjennings]

Looks like this is dependent on which runtime is set. If the runtime is 1.x, eventgridextensionconfig_extension is used. Whereas version 2.x+ is eventgrid_extension:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-grid-trigger?tabs=python%2Cbash#get-the-system-key

[abilous-ti]

@jackofallops @rcskosir I am facing same issue.
event_grid_extension_config_key is empty

I am using Function ~4
Is it a bug?

[markrzasa]

Hi Everyone, I submitted a PR to fix this problem.

In the meantime, in case it helps, one way to work around this problem is using azapi:

data "azapi_resource_action" "function_keys" {
  type                   = "Microsoft.Web/sites@2022-03-01"
  resource_id            = azurerm_linux_function_app.test.id
  action                 = "host/default/listkeys"
  method                 = "POST"
  response_export_values = ["*"]
}

The key can then be accessed with jsondecode(data.azapi_resource_action.function_keys.output)["systemKeys"]["eventgrid_extension"].

[github-actions]

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