azurerm_network_interface does not maintain the order of the dns_servers list

[raphaelcardoso]

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Terraform (and AzureRM Provider) Version

Terraform v0.11.13

• provider.azurerm v1.25.0

Affected Resource(s)

• azurerm_network_interface

Terraform Configuration Files

resource "azurerm_network_interface" "this" {
  name                = "${var.vm_name}-nic"
  location            = "${azurerm_resource_group.this.location}"
  resource_group_name = "${azurerm_resource_group.this.name}"

  dns_servers = [
    "10.0.0.5",
    "10.0.0.6",
    "172.27.0.5"
  ]

  ip_configuration {
    name      = "ipconfig1"
    subnet_id = "${data.azurerm_subnet.this.id}"

    private_ip_address_allocation = "Static"
    private_ip_address            = "172.27.1.10"
  }
}

Debug Output

Panic Output

Expected Behavior

Fragment from the terraform.tfstate file, containing sequential numbers that rule the order.

"primary": {
	"id": "/subscriptions/...",
	"attributes": {
		"applied_dns_servers.#": "3",
		"applied_dns_servers.0": "10.0.0.5",
		"applied_dns_servers.1": "10.0.0.6",
		"applied_dns_servers.2": "172.27.0.5",
		"dns_servers.#": "3",
		"dns_servers.0": "10.0.0.5",
		"dns_servers.1": "10.0.0.6",
		"dns_servers.2": "172.27.0.5",
		"...": "...",
	},
	"meta": {},
	"tainted": false
},

Actual Behavior

Fragment from the terraform.tfstate file, containing random numbers that rule the order.

"primary": {
	"id": "/subscriptions/...",
	"attributes": {
		"applied_dns_servers.#": "3",
		"applied_dns_servers.2028884304": "10.0.0.6",
		"applied_dns_servers.3210460864": "172.27.0.5",
		"applied_dns_servers.3790012650": "10.0.0.5",
		"dns_servers.#": "3",
		"dns_servers.2028884304": "10.0.0.6",
		"dns_servers.3210460864": "172.27.0.5",
		"dns_servers.3790012650": "10.0.0.5",
		"...": "...",
	},
	"meta": {},
	"tainted": false
},

Steps to Reproduce

1. terraform apply

[ghost]

This has been released in version 2.0.0 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 = "~> 2.0.0"
}
# ... 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!