Notification Hub keeps applying namespace_type=notificationhub

[adamcarter81]

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Terraform (and AzureRM Provider) Version

Terraform v1.0.11
on windows_amd64

azurerm = {
source = "hashicorp/azurerm"
version = "~>2.71.0"
}

Affected Resource(s)

azurerm_notification_hub_namespace

Terraform Configuration Files

resource "azurerm_notification_hub_namespace" "notification-hub-ns" {
for_each = var.application_environments
  name                        = join("-", ["ntfns",var.Location-short,each.value])
  location                    = azurerm_resource_group.rg.location
  resource_group_name         = azurerm_resource_group.rg.name

  namespace_type      = "notificationhub"
  sku_name            = "Basic"

  tags = {
    AppEnvironment = each.value     # application environment
    Environment = var.Production
    CreatedBy = var.CreatedBy
    MainContact = var.MainContact
    Location = var.Location-short
  }
}

Debug Output

Panic Output

Expected Behaviour

When running terraform plan after resource creation and no out of band changes have been made, it should not request to add a setting to the notification hub.

Actual Behaviour

Notification Hub Resource was imported into Terraform. Resource then deleted and created via Terraform to confirm the same behaviour. Every time a terraform plan is run, it asks to update the notification hub:

 # azurerm_notification_hub_namespace.notification-hub-ns will be updated in-place
  ~ resource "azurerm_notification_hub_namespace" "notification-hub-ns" {
        id                  = "/subscriptions/xxx/resourceGroups/rg/providers/Microsoft.NotificationHubs/namespaces/ntfns"
        name                = "ntfns"
      + namespace_type      = "notificationhub"
        tags                = {
            "AppEnvironment" = "###"
            "CreatedBy"      = "###"
            "Environment"    = "###"
            "Location"       = "###"
            "MainContact"    = "###"
        }
        # (5 unchanged attributes hidden)
    }

Inspection of the state:

terraform state show 'azurerm_notification_hub_namespace.notification-hub-ns
# azurerm_notification_hub_namespace.notification-hub-ns]:
resource "azurerm_notification_hub_namespace" "notification-hub-ns" {
    enabled             = true
    id                  = "/subscriptions/xxx/resourceGroups/rg-aks-weu-non-prod/providers/Microsoft.NotificationHubs/namespaces/ntfns"
    location            = "westeurope"
    name                = "ntfns"
    resource_group_name = "rg"
    servicebus_endpoint = "https://ntfns.servicebus.windows.net:443/"
    sku_name            = "Basic"
    tags                = {
        "AppEnvironment" = "###"
        "CreatedBy"      = "###"
        "Environment"    = "###"
        "Location"       = "###"
        "MainContact"    = "###"
    }
}

(sensitive info redacted)

Steps to Reproduce

1. terraform apply
2. Observe output to change resource
3. Accept change
4. Run terraform apply again and back to step 2
5. Repeat

Important Factoids

References

• #0000

[tombuildsstuff]

As mentioned in #14828 this is an upstream API issue being tracked in Azure/azure-rest-api-specs#17277

[HaroldH76]

Workaround:

resource "azurerm_notification_hub_namespace" "myhub" {
  name                = "myhub-notification-hub-${var.environment}"
  resource_group_name = azurerm_resource_group.workspace_product.name
  location            = azurerm_resource_group.workspace_product.location
  namespace_type      = "NotificationHub"

  sku_name = var.notification_hub_sku

  lifecycle {
      ignore_changes = [
        # ignore namespace_type because of a bug in Azure: https://github.com/Azure/azure-rest-api-specs/issues/17277
        namespace_type
      ]
    }
}