Let's say I have a module, which generates some ids:
module.tf:
resource "random_id" "etcdapiserver-id" {
byte_length = 4
count = "${var.etcd_apiserver_count}"
}
module_output.tf:
output "etcdapiserver_hostname_list" {
value = ["${random_id.etcdapiserver-id.*.hex}"]
}
It seems to work fine and the list ends up in the output successfully:
terraform output --module=module
etcdapiserver_hostname_list = [
751adf6a,
9e573ee7,
edb94de3
]
Now I want to use elements from this list in main terraform config. Let's say I'm creating several compute instances on openstack:
main.tf:
resource "openstack_compute_instance_v2" "etcdapiserver" {
count = "3"
name = "etcdapi-node-${element(module.ignition.etcdapiserver_hostname_list.*, count.index)}"
But it would fail with
Error: resource 'openstack_compute_instance_v2.etcdapiserver' config:
"etcdapiserver_hostname_list.*" is not a valid output for module
"ignition"
Is there any way to do it? Thanks!
Best Answer
Terraform contributor answered my question on GitHub.