How to list public IP addresses in a file

[vid.j...@gmail.com]

Hi,

I have created a few VMs with public IP addresses without using count.

data "azurerm_public_ips" "network" {
  resource_group_name = "${azurerm_resource_group.resource_group.name}"
  attached            = true
  allocation_type     = "Dynamic"
}

resource "azurerm_public_ip" "network-worker" {
  name                         = "vm-public-ip-worker"
  location                     = "${azurerm_resource_group.resource_group.location}"
  resource_group_name          = "${azurerm_resource_group.resource_group.name}"
  public_ip_address_allocation = "Dynamic"
  idle_timeout_in_minutes      = 30
}

resource "azurerm_public_ip" "network-web" {
  name                         = "vm-public-ip-web"
  location                     = "${azurerm_resource_group.resource_group.location}"
  resource_group_name          = "${azurerm_resource_group.resource_group.name}"
  public_ip_address_allocation = "Dynamic"
  idle_timeout_in_minutes      = 30
}

resource "azurerm_public_ip" "network-db" {
  name                         = "vm-public-ip-db"
  location                     = "${azurerm_resource_group.resource_group.location}"
  resource_group_name          = "${azurerm_resource_group.resource_group.name}"
  public_ip_address_allocation = "Dynamic"
  idle_timeout_in_minutes      = 30
}

Now I'd like to print the public ips newline separated into a file. I know it can be achieved when using count with the following syntax:

resource "local_file" "inventory" {
  content  = "${format("%s\n", join("\n", azurerm_public_ip.network.*.ip_address))}"
  filename = "inventory"
}

But since my VMs are named differently, I would need another approach. Preferably something in the lines of:

resource "local_file" "vms" {
  content  = "${format("%s\n", join("\n", azurerm_public_ip.*.ip_address))}"
  filename = "inventory"
}

OR

resource "local_file" "vms" {
  content  = "${format("%s\n", join("\n", data.azurerm_public_ips.network.ip_addresses))}"
  filename = "inventory"
}

Yet I haven't found a syntax that would work for this use case :(

This one is unfortunately too verbose to write out to a file with the "local_file" terraform provider.

output "public_ip_addresses" {
  value = "${data.azurerm_public_ips.network.public_ips}"
}

Is there a good approach to list them out, without naming each explicitly? (like in the example below... because this list will grow over time and would really need dynamic generation)

content  = "${format("%s\n%s\n%s\n", azurerm_public_ip.network-worker.ip_address, ...))}"