How to get public IP of azure VM from the below terraform code - azure-devops

Question

I have a terraform code which needs to retrieve public ip of a vm, here is my code
# Create virtual machine
resource "azurerm_virtual_machine" "myterraformvm" {
name = "myTerraformVM"
location = "Central India"
resource_group_name = "rg-mpg-devops-poc"
network_interface_ids = ["/subscriptions/*************/resourceGroups/rg-mpg-devops-poc/providers/Microsoft.Network/networkInterfaces/nic-mpg-devops"]
vm_size = "Standard_DS1_v2"
storage_os_disk {
name = "myOsDisk"
caching = "ReadWrite"
create_option = "FromImage"
managed_disk_type = "Premium_LRS"
}
os_profile {
computer_name = "myvm"
admin_username = "azureuser"
}
os_profile_linux_config {
disable_password_authentication = true
ssh_keys {
path = "/home/azureuser/.ssh/authorized_keys"
key_data = "ssh-rsa *********************"
}}
boot_diagnostics {
enabled = "true"
storage_uri = "https://*******.blob.core.windows.net/"
}}
Here am using NIC id , which will provide public ip by default, Can some one help me on this?

Answer 1

you would use data module for that:
data "azurerm_network_interface" "test" {
name = "acctest-nic"
resource_group_name = "networking"
}
that will give you NIC object, that will have ip_configuration block, that (in turn) will have public_ip_address_id parameter and you will use that to get data for the public ip:
data "azurerm_public_ip" "test" {
name = "name_of_public_ip"
resource_group_name = "name_of_resource_group"
}
output "domain_name_label" {
value = "${data.azurerm_public_ip.test.domain_name_label}"
}
output "public_ip_address" {
value = "${data.azurerm_public_ip.test.ip_address}"
}
you will have to parse resource ID into resource group\name of the resource obviously, but that can be easily done with split + array index
https://www.terraform.io/docs/providers/azurerm/d/public_ip.html
https://www.terraform.io/docs/providers/azurerm/d/network_interface.html

Answer 2

I tried this and could not retrieve the public IP. (more than likely pilot error.)
In my case I needed to retrieve an address for installing chef in a later step, so IP or FQDN would work. Here is how I got through this:
When creating my public ip, I added the domain label. Use this same value when you define your machine name.
resource "azurerm_public_ip" "CSpublicip" {
name = "myPublicIP"
location = "eastus"
resource_group_name = "${azurerm_resource_group.CSgroup.name}"
allocation_method = "Dynamic"
domain_name_label = "csvm${random_integer.server.result}"
When you add the domain label, Azure creates a reachable FQDN. Once you have that, you can use/retrieve the fqdn.
output "AzurePage" {
value = "${azurerm_public_ip.CSpublicip.fqdn}"