How to extract private IP address from terraform module - terraform

Question

Terraform code is below
module "centos-vm-author-2" {
source = "terraform.automation.temp.com.au/temp/temp-linux-vm/azurerm"
version = "6.7.0"
location = var.resource_location
resource_group_name = var.resource_group_name_2
vm_count = "1"
tags = local.tags
size = var.vm_size
hostname_prefix = var.hostname_prefix
hostname_suffix_start_range = "491"
image_publisher = "OpenLogic"
image_offer = "Centos"
image_sku = "7_9"
subnet_id = var.auth_pub_subnet_id
admin_username = "azureadmin"
availability_set_id = azurerm_availability_set.aemfeature1authoras.id
patching_tags = local.patching_tags
ansible_vault_key = var.ansible_vault_key
log_to_loganalytics = false
ou_tags = local.ou_tags
os_disk_size = var.os_size_gb
os_disk_type = var.storage_account_type
server_access_memberships = ["CN=DSTDEVOPS,OU=DistributionGroups,OU=Groups,OU=Resources,DC=temp,DC=int"]
sudoers = ["%DSTDEVOPS"]
data_disks = [
[
{
disk_size_gb = var.disk_size_gb
storage_account_type = var.storage_account_type
caching = "ReadWrite"
create_option = "Empty"
source_resource_id = ""
write_accelerator_enabled = false
}
]
]
}
resource "null_resource" "centos-vm-author-ansible" {
provisioner "local-exec" {
command = <<EOF
ansible-playbook -i '${join(",", azurerm_network_interface.centos-vm-author-2.*.private_ip_address)},'-e ansible_user=${var.admin_username} -e "role_name=automate-author" main.yaml
EOF
}
depends_on = [
module.centos-vm-author-2
]
}
}
Basically I want to tell Ansible the Private IP onto which it should execute the role.
I am getting error like below,
Error: [0m[0m[1mReference to undeclared resource[0m
on main.tf line 236, in resource "null_resource" "centos-vm-author-ansible":
ansible-playbook -i '${join(",", [4mazurerm_network_interface.centos-vm-author-2.*.private_ip_address)},'-e ansible_user=${var.admin_username} -e "role_name=automate-author" main.yaml
A managed resource "azurerm_network_interface" "centos-vm-author-2" has not
been declared in the root module.
Sincerely appreciate any help to understand what is the issue and how to have it resolved.
P.S: The TF Module code is like below:
resource "azurerm_network_interface" "main" {
count = var.vm_count
name = "${format("${var.hostname_prefix}%04d", var.hostname_suffix_start_range + count.index, )}-nic"
location = var.location
resource_group_name = var.resource_group_name
enable_accelerated_networking = var.enable_accelerated_networking
ip_configuration {
name = "${format("${var.hostname_prefix}%04d", var.hostname_suffix_start_range + count.index, )}-ipconfig"
subnet_id = var.subnet_id
private_ip_address_allocation = var.private_ip_address_allocation
private_ip_address = var.private_ip_address
public_ip_address_id = var.enable_public_ip_address ? azurerm_public_ip.main[count.index].id : null
}
tags = var.tags
}
resource "azurerm_network_interface_backend_address_pool_association" "lbconf" {
count = var.backend_address_pool_id == null ? 0 : var.vm_count
network_interface_id = azurerm_network_interface.main[count.index].id
ip_configuration_name = azurerm_network_interface.main[count.index].ip_configuration[0].name
backend_address_pool_id = var.backend_address_pool_id
}
resource "azurerm_linux_virtual_machine" "main" {
count = var.vm_count
name = format("${var.hostname_prefix}%04d", var.hostname_suffix_start_range + count.index, )
location = var.location
resource_group_name = var.resource_group_name
admin_username = var.admin_username
admin_ssh_key {
username = var.admin_username
public_key = chomp(tls_private_key.bootstrap_private_key.public_key_openssh)
}
disable_password_authentication = var.disable_password_authentication
network_interface_ids = [azurerm_network_interface.main[count.index].id]
size = var.size
availability_set_id = var.availability_set_id
source_image_reference {
publisher = var.image_publisher
offer = var.image_offer
sku = var.image_sku
version = var.image_version
}
os_disk {
name = "${format("${var.hostname_prefix}%04d", var.hostname_suffix_start_range + count.index, )}-osdisk"
caching = "ReadWrite"
storage_account_type = var.os_disk_type
disk_size_gb = var.os_disk_size
}
dynamic "identity" {
for_each = var.identity
content {
type = identity.value["type"]
identity_ids = identity.value["type"] == "SystemAssigned" ? [] : identity.value["identity_ids"]
}
}
dynamic "plan" {
for_each = var.marketplace_image ? [1] : []
content {
name = var.image_sku
product = var.image_offer
publisher = var.image_publisher
}
}
# boot_diagnostics {
# storage_account_uri = var.boot_diagnostics_storage_uri
# }
tags = var.ou_tags == null ? merge(var.tags, var.patching_tags) : merge(var.tags, var.ou_tags, var.patching_tags)
}

Answer 1

To refer to your module, instead of:
azurerm_network_interface.centos-vm-author-2.*.private_ip_address
it should be:
module.centos-vm-author-2.private_ip_addresses