Terraform ip range

Question

I'm in the process of trying to create a list of ip's using a combination of a for loop and the range function. I'm trying to get the loop to iterate through the range of numbers and appending that number as the last digits in an ip address.

locals {
  windows_ip_list = [for i in range(var.Number) : format("%s%02d", "10.16.0.1", i)]
}

Giving the variable var.Number a value of 5 creates a 5 element tuple but the following error is probvided.

│    9:   private_ip = local.windows_ip_list  #var.win_ip[count.index]
│     ├────────────────
│     │ local.windows_ip_list is tuple with 5 elements
│ 
│ Inappropriate value for attribute "private_ip": string required.

resource "aws_instance" "Windows" {
  ami = "ami-02c1f4de3809f0050"
  instance_type   = "t2.large"
  #subnet_id       = aws_subnet.Engineering[count.index].id 
  subnet_id = aws_subnet.windows.id 
  security_groups = [aws_security_group.Engineering.id]
  key_name = aws_key_pair.ENG-DEV.id
  count    = var.Number
  private_ip = local.windows_ip_list  #var.win_ip[count.index]
  associate_public_ip_address = false

Any help creating the desired list would be appreciated.

Thanks in advance.

Answer 1

Calling the variable and using the count.index was how it was fixed.

private_ip = local.windows_ip_list[count.index]