locals {
  inventory = {
    all = {
      vars = {
        ansible_user = "cloud"
      }
      children = {
        for svc in distinct([for k, v in var.instances : v.service_name]) :
        svc => {
          hosts = {
            for k, v in var.instances :
            v.vm_name => {
              ansible_host = v.ipv4_address
            }
            if v.service_name == svc
          }
        }
      }
    }
  }
}

resource "local_file" "inventory" {
  filename = var.filename
  content  = yamlencode(local.inventory)
}