terraform - Accessing the output from module via index -

i trying create 2 vms on azure using terraform.

i create 2 nics like

variable "internalips" {   description = "list of internal ips"   default = ["10.0.2.10", "10.0.2.11"]   type = "list" }   resource "azurerm_network_interface" "helloterraformnic" { count = 2 name = "nic-${count.index}" location = "west us" resource_group_name = "myrg"      ip_configuration {         name = "testconfiguration1"         subnet_id = "${azurerm_subnet.helloterraformsubnet.id}"         private_ip_address_allocation = "static"         private_ip_address = "${element(private_ip_address, count.index)}"     } } 

now want use them in module azurerm_virtual_machine

resource "azurerm_virtual_machine" "helloterraformvm" {     count = 2     name = "${element(elasticmachines, count.index)}"     location = "west us"     resource_group_name = "myrg"     network_interface_ids = "${element(azurerm_network_interface.helloterraformnic, count.index)}" .... } 

this gives me error

failed load root config module: error loading azure/rg.tf: error reading config azurerm_virtual_machine[helloterraformvm]: azurerm_network_interface.helloterraformnic: resource variables must 3 parts: type.name.attr in:

${element(azurerm_network_interface.helloterraformnic, count.index)}

how can use above created nics using index ?

first thinking use length function counts more hard coding it.

from

count = 2 

change

count = "${length(var.internalips)}" 

for problem, need tell resource attribute want value.

network_interface_ids = "${element(azurerm_network_interface.helloterraformnic.id, count.index)}" 

refer:

terraform interpolation syntax

terraform azurerm_virtual_machine attributes reference