main.tf

variable "environment_code" { default = "US"}
variable "deployment_code" { default = "T"}
variable "location_code" { default = "V"}
variable "instance_count" { default = 1}

//variable "enable_msi" {  default = false}
variable "msi_block_identity" {
  type = "map"
  default = {
    "type" = "SystemAssigned"
  }
}



locals {
  base_hostname = "${format("%s%s%s%s%s", var.environment_code, var.deployment_code, var.location_code, "l", "xyz")}"
}

provider "azurerm" {
  subscription_id = "72f988bf-86f1-41af-91ab-2d7cd011db47"
}

resource "azurerm_resource_group" "rg" {
  name = "${format("%s%s%s-Web", upper(var.environment_code), upper(var.deployment_code), upper(var.location_code))}"
  location = "eastus"
}

resource "azurerm_virtual_network" "network" {
    name                = "myVnet"
    address_space       = ["10.0.0.0/16"]
    location            = "${azurerm_resource_group.rg.location}"
    resource_group_name = "${azurerm_resource_group.rg.name}"
}
resource "azurerm_subnet" "subnet" {
    name                 = "mySubnet"
    resource_group_name  = "${azurerm_resource_group.rg.name}"
    virtual_network_name = "${azurerm_virtual_network.network.name}"
    address_prefix       = "10.0.1.0/24"
}

resource "azurerm_network_interface" "nic" {
    count = "${var.instance_count}"
    name = "${format("%s%03dNetworkInterface", local.base_hostname, count.index + 1)}"
    location                  = "${azurerm_resource_group.rg.location}"
    resource_group_name       = "${azurerm_resource_group.rg.name}"

    ip_configuration {
        name                          = "myNicConfiguration"
        subnet_id                     = "${azurerm_subnet.subnet.id}"
        private_ip_address_allocation = "dynamic"
    }
}

resource "azurerm_availability_set" "av_set" {
 name = "myAvSet"
 location = "${azurerm_resource_group.rg.location}"
 resource_group_name = "${azurerm_resource_group.rg.name}"
 managed = true
 platform_fault_domain_count = 2
 platform_update_domain_count = 20
}

resource "azurerm_virtual_machine" "vm" {
    count = "${var.instance_count}"
    name                  = "${format("%s%03d", local.base_hostname, count.index + 1)}"
    location              = "${azurerm_resource_group.rg.location}"
    resource_group_name   = "${azurerm_resource_group.rg.name}"
    network_interface_ids = ["${element(azurerm_network_interface.nic.*.id, count.index)}"]
    availability_set_id   = "${azurerm_availability_set.av_set.id}"
    vm_size               = "Standard_A1"

    storage_os_disk {
        name              = "${format("%s%03d", local.base_hostname, count.index + 1)}-osdisk"
        caching           = "ReadWrite"
        create_option     = "FromImage"
        managed_disk_type = "Standard_LRS"
    }

    storage_image_reference {
        publisher = "Canonical"
        offer     = "UbuntuServer"
        sku       = "16.04.0-LTS"
        version   = "latest"
    }

    os_profile {
        computer_name  = "myvm"
        admin_username = "azureuser"
    }

    identity = "${var.msi_block_identity}"

    os_profile_linux_config {
        disable_password_authentication = true
        ssh_keys {
            path     = "/home/azureuser/.ssh/authorized_keys"
            key_data = "ssh-rsa AAAEvL5aUMfWFBRXtl8FnKcZTGV"
        }
    }
}