Initial commit

.github/workflows/terraform-validate.yml

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+name: Terraform Validate
+
+run-name: ${{ github.actor }} - ${{ github.ref_name }}
+
+on:
+  pull_request:
+    branches: ["main"]
+
+  workflow_dispatch:
+
+jobs:
+  terraform_validate:
+    name: "Format and Validate Code"
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Terraform
+      uses: hashicorp/setup-terraform@v3
+      with:
+        terraform_version: 1.8.4
+
+    - name: Terraform Fmt
+      run: terraform fmt -check -recursive -diff
+
+    - name: Check count function
+      run: |
+        if ! grep -Eq 'count\s+=' network.tf; then
+          echo "Count function not found in network.tf!"
+          exit 1
+        fi
+        echo "Count function is present."
+
+    - name: Check for_each function
+      run: |
+        if ! grep -Eq 'for_each\s+=' vmss.tf; then
+          echo "For_each function not found in vmss.tf!"
+          exit 1
+        fi
+        echo "For_each function is present."
+
+    - name: Check lifecycle block
+      run: |
+        if ! grep -q 'lifecycle {' ./*.tf; then
+          echo "lifecycle block not found!"
+          exit 1
+        fi
+        echo "lifecycle block is present."
+
+    - name: Check dynamic blocks
+      run: |
+        if ! grep -q 'dynamic "security_rule"' ./*.tf; then
+          echo "dynamic blocks for network security rules not found!"
+          exit 1
+        fi
+        echo "dynamic blocks are present."
+
+    - name: Check built-in functions usage
+      run: |
+        if ! grep -q 'upper(' ./*.tf || ! grep -q 'join(' ./*.tf || ! grep -q '\[for' ./*.tf; then
+          echo "built-in functions not used correctly!"
+          exit 1
+        fi
+        echo "built-in functions are present."
+  
+    - name: Terraform Init
+      run: terraform init
+
+    - name: Terraform Validate
+      run: terraform validate

README.md

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+# HCL Language Features with Terraform
+
+This task involves utilizing various HCL language features such as count, for_each, Terraform lifecycle, dynamic blocks, and built-in functions.
+
+## Prerequisites
+
+- Basic understanding of Terraform and Azure.
+- Terraform installed on your machine.
+- Azure CLI installed and configured.
+
+## Hands-on Task
+
+1. Fork this repository.
+2. Create multiple instances of a resource using the `count` meta-argument.
+3. Create multiple network interfaces using the `for_each` meta-argument.
+    * Add a resource block that creates multiple network interfaces using `for_each`.
+    * Use a local value to define a list of network interface names.
+    * Iterate over the list using `for_each` to create the resources.
+4. Add a lifecycle block to prevent accidental virtual machine resource deletion.
+5. Add dynamic blocks for network security rules.
+    * Define a list of network security rules in a local value.
+    * Use a dynamic block to iterate over the list and create the security rules.
+6. Use built-in functions to manipulate strings and other data.
+    * Create an output block that converts the virtual machine name to uppercase.
+    * Create an output block that joins multiple tag values into a single string.
+    * Create an output block that uses a for loop to get the IDs of all virtual machines.
+7. Organize the Terraform code into multiple files for better readability and maintenance.
+

main.tf

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+terraform {
+  required_providers {
+    azurerm = {
+      source = "hashicorp/azurerm"
+      version = "3.105.0"
+    }
+  }
+}
+
+provider "azurerm" {
+  features {}
+}
+
+variable "prefix" {
+  default = "tfvmex"
+}
+
+resource "azurerm_resource_group" "example" {
+  name     = "${var.prefix}-resources"
+  location = "West Europe"
+}
+
+resource "azurerm_virtual_network" "main" {
+  name                = "${var.prefix}-network"
+  address_space       = ["10.0.0.0/16"]
+  location            = azurerm_resource_group.example.location
+  resource_group_name = azurerm_resource_group.example.name
+}
+
+resource "azurerm_subnet" "internal" {
+  name                 = "internal"
+  resource_group_name  = azurerm_resource_group.example.name
+  virtual_network_name = azurerm_virtual_network.main.name
+  address_prefixes     = ["10.0.2.0/24"]
+}
+
+resource "azurerm_network_interface" "main" {
+  name                = "${var.prefix}-nic"
+  location            = azurerm_resource_group.example.location
+  resource_group_name = azurerm_resource_group.example.name
+
+  ip_configuration {
+    name                          = "testconfiguration1"
+    subnet_id                     = azurerm_subnet.internal.id
+    private_ip_address_allocation = "Dynamic"
+  }
+}
+
+resource "azurerm_virtual_machine" "main" {
+  name                  = "${var.prefix}-vm"
+  location              = azurerm_resource_group.example.location
+  resource_group_name   = azurerm_resource_group.example.name
+  network_interface_ids = [azurerm_network_interface.main.id]
+  vm_size               = "Standard_DS1_v2"
+
+  storage_image_reference {
+    publisher = "Canonical"
+    offer     = "0001-com-ubuntu-server-jammy"
+    sku       = "22_04-lts"
+    version   = "latest"
+  }
+  storage_os_disk {
+    name              = "myosdisk1"
+    caching           = "ReadWrite"
+    create_option     = "FromImage"
+    managed_disk_type = "Standard_LRS"
+  }
+  os_profile {
+    computer_name  = "hostname"
+    admin_username = "testadmin"
+    admin_password = "Password1234!"
+  }
+  os_profile_linux_config {
+    disable_password_authentication = false
+  }
+  tags = {
+    environment = "staging"
+  }
+}