how to associate floating ip address to a instance in openstack using terraform

I am using terraform to create couple of instances in openstack and I would like to automatically assign floatings ip address to them without any manual intervention.

My .tf file is as below:

resource "openstack_networking_floatingip_v2" "floating-ip" { count = 4 pool = "floating-ip-pool" } resource "openstack_compute_floatingip_associate_v2" "fip-associate" { floating_ip = openstack_networking_floatingip_v2.floating-ip.address[count.0] instance_id = openstack_compute_instance_v2.terraform-vm.id[count.0] }` 

I am getting an error

"Error: Missing resource instance key

on image-provisioning.tf line 33, in resource "openstack_compute_floatingip_associate_v2" "fip-associate": 33: instance_id = openstack_compute_instance_v2.terraform-vm.id[count.0]"

My terraform version is : Terraform v0.12.24 + provider.openstack 1.26.0

2 Answers

able to resolve using for_each option in terraform :

resource "openstack_compute_instance_v2" "terraform_vm" { image_id = "f8b9189d-2518-4a32-b1ba-2046ea8d47fd" for_each = var.instance_name name = each.key flavor_id = "3" key_pair = "openstack vm key" security_groups = ["default"] network { name = "webapps-network" } } resource "openstack_networking_floatingip_v2" "floating_ip" { pool = "floating-ip-pool" for_each = var.instance_name 

}

resource "openstack_compute_floatingip_associate_v2" "fip_associate" { for_each = var.instance_name floating_ip = openstack_networking_floatingip_v2.floating_ip[each.key].address instance_id = openstack_compute_instance_v2.terraform_vm[each.key].id } 

You need to use the port_id in the associate. That can be looked up using the compute instance IPv4 address:

resource "openstack_networking_floatingip_v2" "floating-ip" { # count = 4 pool = "floating-ip-pool" } data "openstack_networking_port_v2" "terraform-vm" { fixed_ip = openstack_compute_instance_v2.terraform-vm.access_ip_v4 } resource "openstack_compute_floatingip_associate_v2" "fip-associate" { floating_ip = openstack_networking_floatingip_v2.floating-ip.address port_id = data.openstack_networking_port_v2.terraform-vm.id }