How to switch to association resource due to deprecation of property

[pixelicous]

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Hi,

I have a module that went out of sync between state and Azure portal.
I have modified the module, aligned it, ran init/plan and started importing already existing resources.

Those resources are basically subnets with route tables and nsgs on them.
i have created association resource objects for both nsg and routing table and imported these as well.

When i execute the plan command, i get a line showing that the "route_table_id" property will change to NULL from the value that it had, for example -

• route_table_id = "/subscriptions/xxx-xxx-xx/resourceGroups/my-rg/providers/Microsoft.Network/routeTables/my-rt" -> null

I tried modifying the state file manually, basically removing the value of route_table_id for those imported objects to be null, or jut or remove the property all together, the plan executed after that didn't show like there is a difference. Still showed like it is going to be null after the change.

To overcome this i decided to manually change the hcl and add that route_table_id property, maybe terraform will now not try to make a "null" out of it. this just showed like the new proprerty will be added now, and not changed or deleted.

So i removed this change as well.

After running apply once more, the routes and nsg were removed from the attached subnets, not sure why, the association objects are there.

I put back the "route_table_id_property" on the objects, ran apply, now "nothing changed", but i still have both tthe association and the property configured, when tryingt o remove the property terraform shows like it will re-add it.

So how can one remove a depcreated property????

Terraform (and AzureRM Provider) Version

terraform 0.12.9
azurerm 1.36.1

Affected Resource(s)

• azure_rm_route_table
• azure_rm_route_table_association
• azure_rm_subnet
• azure_rm_security_group
• azure_rm_security_group_association

Terraform Configuration Files

resource azurerm_subnet internal {
  count                = length(local.internal_subnets["name"])
  name                 = element(local.internal_subnets["name"], count.index)
  virtual_network_name = azurerm_virtual_network.vnet.name
  resource_group_name  = azurerm_resource_group.network.name
  address_prefix       = element(local.internal_subnets["address_prefix"], count.index)


resource azurerm_subnet_route_table_association internal_to_trust {
  count          = length(local.internal_subnets["name"])
  subnet_id      = element(azurerm_subnet.internal.*.id, count.index)
  route_table_id = azurerm_route_table.test_rt.id
}

resource azurerm_route_table test_rt {
  name                   = "my-rt"
  location            = terraform.workspace
  resource_group_name = azurerm_resource_group.network.name

  tags = var.tags
}
}```

### Panic Output

Warning: "network_security_group_id": [DEPRECATED] Use the `azurerm_subnet_network_security_group_association` resource instead
Warning: "route_table_id": [DEPRECATED] Use the `azurerm_subnet_route_table_association` resource instead.

[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 👉 [email protected]. Thanks!