talos cluster in azure

You want to set up a Talos cluster on Microsoft Azure using Terraform. Let's dive in!

We'll define a basic Terraform configuration that creates a Kubernetes cluster with Talos as the operating system on Azure. This includes setting up the required resources like the Virtual Network, Subnets, and Virtual Machines.

Here's how you can do it:

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "myResourceGroup"
  location = "West Europe"
}

resource "azurerm_virtual_network" "example" {
  name                = "myVnet"
  address_space       = ["10.0.0.0/16"]
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_subnet" "example" {
  name                 = "mySubnet"
  resource_group_name  = azurerm_resource_group.example.name
  virtual_network_name = azurerm_virtual_network.example.name
  address_prefix       = "10.0.1.0/24"
}

resource "azurerm_network_interface" "example" {
  name                = "myNIC"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name

  ip_configuration {
    name                          = "myNicConfiguration"
    subnet_id                     = azurerm_subnet.example.id
    private_ip_address_allocation = "Dynamic"
  }
}

resource "azurerm_virtual_machine" "master" {
  name                  = "master-vm"
  location              = azurerm_resource_group.example.location
  resource_group_name   = azurerm_resource_group.example.name
  network_interface_ids = [azurerm_network_interface.example.id]
  vm_size               = "Standard_D2_v2"

  storage_os_disk {
    name              = "myOsDisk"
    caching           = "ReadWrite"
    create_option     = "FromImage"
    managed_disk_type = "Standard_LRS"
  }

  os_profile {
    computer_name  = "hostname"
    admin_username = "adminuser"
    custom_data    = filebase64("${path.module}/master-init.yaml") # Talos init config
  }

  os_profile_linux_config {
    disable_password_authentication = true
  }

  source_image_reference {
    publisher = "kedacore"
    offer     = "talos"
    sku       = "v0.13.4"
    version   = "latest"
  }
}

resource "azurerm_virtual_machine" "worker" {
  name                  = "worker-vm"
  location              = azurerm_resource_group.example.location
  resource_group_name   = azurerm_resource_group.example.name
  network_interface_ids = [azurerm_network_interface.example.id]
  vm_size               = "Standard_D2_v2"

  storage_os_disk {
    name              = "myOsDisk"
    caching           = "ReadWrite"
    create_option     = "FromImage"
    managed_disk_type = "Standard_LRS"
  }

  os_profile {
    computer_name  = "hostname"
    admin_username = "adminuser"
    custom_data    = filebase64("${path.module}/worker-init.yaml") # Talos init config
  }

  os_profile_linux_config {
    disable_password_authentication = true
  }

  source_image_reference {
    publisher = "kedacore"
    offer     = "talos"
    sku       = "v0.13.4"
    version   = "latest"
  }
}

output "master_public_ip" {
  value = azurerm_public_ip.master.ip_address
}

output "worker_public_ip" {
  value = azurerm_public_ip.worker.ip_address
}

Explanation:

We start by declaring an Azure provider.
Set up a resource group and a virtual network with a subnet.
Create network interfaces for our VMs.
Configure two virtual machines (master and worker) with Talos images.
Use the custom_data field to inject the Talos configuration files (master-init.yaml and worker-init.yaml), which need to be created separately.

This program will set up the basic infrastructure required for a Talos Kubernetes cluster on Azure. Adjust configurations to match your specific requirements.