AWS Terraform target group for vpc endpoints - amazon-web-services

Question

How can I create a target group for a network load balancer containing a VPC endpoint in Terraform?
In AWS console, I would have done following steps:
Create VPC Endpoint in two subnets to an endpoint service in another VPC
Create a target group of type IP and register the IP adresses of
the enpoints created in step 1
In terraform, I can create target groups and endpoints, but I don't know how to assign the enpoint's IPs to the target group. Where can I find instructions or an example how to do this? (Creating target groups for type instance is no problem, my question is specific for type IP).

Answer 1

Late to the party! But this is what I did.
Created a null resource that would get the IP addresses of the VPC endpoints and store it in a file
resource "null_resource" "nlb" {
triggers = {
always_run = "${timestamp()}"
}
provisioner "local-exec" {
command = "dig +short ${lookup(tomap(element(aws_vpc_endpoint.api-gw.dns_entry, 0)), "dns_name", "")} > /tmp/entry"
}
}
and then read the file entries
resource aws_lb_target_group_attachment nlb {
depends_on = [
null_resource.nlb
]
for_each = toset(slice(split("\n", file("/tmp/entry")), 0, 2))
target_group_arn = resource.aws_lb_target_group.nlb.arn
target_id = each.value
port = 443
}