Kafka API default value causes namespace recreation

[cima]

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Terraform (and AzureRM Provider) Version

• Terraform v0.11.13
• provider.azurerm: version = "~> 1.35"

Affected Resource(s)

• azurerm_eventhub_namespace

Terraform Configuration Files

terraform {
  backend "azurerm" {}
}
provider "azurerm" {}

# Directly taken from https://www.terraform.io/docs/providers/azurerm/r/eventhub_namespace.html
resource "azurerm_resource_group" "eventhub_terraform_bug" {
  name     = "eventhub-terraform-bug"
  location = "west europe"
}
resource "azurerm_eventhub_namespace" "eventhub_terraform_bug_namespace" {
  name                = "eventhub-terraform-bug"
  location            = "${azurerm_resource_group.eventhub_terraform_bug.location}"
  resource_group_name = "${azurerm_resource_group.eventhub_terraform_bug.name}"
  sku                 = "Standard"
}

Debug Output

• https://github.com/cima/eventhub-terraform-bug/blob/master/doc/first_run.log
• https://github.com/cima/eventhub-terraform-bug/blob/master/doc/second_run.log

Expected Behavior

If I create eventhub namespace without kafka_enable and run terraform repeatedly it doesn't recreate the resource.

Actual Behavior

Microsoft made Kafka API compulsory at new eventhub namespaces of Standard tier. Second and any consecusive execution of the script causes the eventhub namespace to be removed and created again.

Steps to Reproduce

1. terraform apply
2. terraform apply

See extensive project with detailed description at https://github.com/cima/eventhub-terraform-bug

Important facts

The SKU must be Standard.

References

• A complete example project with outputs can be found at https://github.com/cima/eventhub-terraform-bug

• #0000

[tombuildsstuff]

hi @cima

Thanks for opening this issue.

The fix for this has been merged in #4743 which will be shipping as a part of v1.37 - since the fix for this has been merged I'm going to close this issue for the moment - however as I've assigned this to the 1.37 milestone @hashibot will comment here when this has been released.

In the interim it should be possible to work around this using an ignore_changes element within the lifecycle block to ignore the changes to this field, like so:

resource "azurerm_eventhub_namespace" "example" {
  # ...

  lifecycle {
    ignore_changes = [
      "kafka_enabled",
    ]
  }
}

Thanks!

[ghost]

This has been released in version 1.37.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 1.37.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!