Create an Azure virtual machine using Terraform

I have previously written an article about using Terraform to deploy a Proxmox virtual machine . It is a virtual machine environment built on a Core i7-8700 + 64G Homelab. This is also my experimental environment. Until I joined Microsoft MVP last year and got Azure credit, I would also choose to use Azure virtual machines when I needed more resources or pulled images frequently, especially recently when I often do testing in a multi-cluster environment.

When creating virtual machines on Azure, I started with a web page-specific CLI, and now use Terraform when complex configuration is required. This article will share how to use Terraform to configure the creation of Azure virtual machines.

Terraform is an infrastructure-as-code software tool. Using Terraform, you can write code to describe the desired state of the infrastructure (including cloud and local resources such as virtual machines, load balancers, databases, etc.), and build, change, and version cloud and local resources safely, flexibly, and efficiently.

Preconditions

Before starting, make sure you have the following conditions:

Azure account
Terraform CLI
Azure CLI

Certification

Since we want to automate, the first step is to solve the authentication problem. After all, it is unrealistic to perform manual authentication every time, and it is not in line with the characteristics of lazy people.

Terraform's Azure Provider supports 5 authentication methods . Since I only use it locally, this article is authenticated through Azure CLI .

Execute the following command to enable authentication. Before authentication, you need to visit https://portal.azure.com/#settings/directory to obtain tenant information.

az login --tenant  xxxx

After executing the command, you will automatically jump to the browser to complete the authentication process.

After successful authentication, account information can be viewed through commands.

az account show
{
  "environmentName": "AzureCloud",
  "homeTenantId": "00000000-0000-0000-0000-000000000000",
  "id": "00000000-0000-0000-0000-000000000000",
  "isDefault": true,
  "managedByTenants": [],
  "name": "Microsoft Azure 赞助",
  "state": "Enabled",
  "tenantId": "00000000-0000-0000-0000-000000000000",
  "user": {
    "name": "[email protected]",
    "type": "user"
  }
}

If there are multiple subscriptions, you need to set the subscription used by the current account.

az account set --subscription 00000000-0000-0000-0000-000000000000

code

The script has been submitted on GitHub and can be obtained at https://github.com/addozhang/terraform-azure-sample .

Clone the code locally.

git clone https://github.com/addozhang/terraform-azure-sample.git

The script contains two parts:

resource-group: All resources on Azure are created under a certain resource group. Before creating a virtual machine, you need to create a resource group or use an existing resource group. When you create a resource group, virtual networks and subnets are also created.
virtual-machine: As the name suggests, create virtual machine resources.

Create resource group

Enter the directory resource-groupand execute the following commands to initialize Terraform and download the Azure provider.

terraform init

variables.tfThe input parameters are defined in the file: resource group name and location . Execute the following command to create a resource group, or specify the name and location through parameters when creating it.

Execute the command to inspect the Terraform code.

terraform validate

Execute the following command to apply the code.

# 在 resource-group 目录中执行
terraform apply
# 或者
terraform apply -var "name=demo" -var "location=eastasia"

By terraform state listviewing the resource created. Or terrafor showview resource details via .

terraform state list

azurerm_resource_group.demo
azurerm_subnet.demo
azurerm_virtual_network.demo

Create a virtual machine

Enter the directory virtual-machinedirectory and still run the command first to initialize.

terraform init

There will be more parameters to create a virtual machine. The specific parameter definitions can be viewed . Parameter values can be set variables.tfthrough the file. Here you need to specify the subscription ID used .terraform.tfvars

Perform code and parameter checks.

terraform validate

Execute the command to create the virtual machine.

# 在 virtual-machine 目录中执行
terraform apply

For example, set the number of virtual machines vm_countto 3and view the resources after executing the above command.

terraform state list

azurerm_linux_virtual_machine.demo[0]
azurerm_linux_virtual_machine.demo[1]
azurerm_linux_virtual_machine.demo[2]
azurerm_network_interface.demo[0]
azurerm_network_interface.demo[1]
azurerm_network_interface.demo[2]
azurerm_public_ip.demo[0]
azurerm_public_ip.demo[1]
azurerm_public_ip.demo[2]

Through the command, terraform showyou can view the detailed information of the resource, such as the IP address of the public network, etc.

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