Terraform is an open-source infrastructure as code software tool. Infrastructure as code (IaC) tools allow you to manage infrastructure with configuration files rather than through a graphical user interface.

Terraform Providers are plugins that implement resource types: Ex. azurerm ( hashicorp/terraform-provider-azurerm) https://registry.terraform.io/browse/providers

Installation

choco install terraform terraform -install-autocomplete

terraform {
    required_providers {
    docker = {
      source = "kreuzwerker/docker"
      version = "~> 2.15.0"
    }
  }
}

provider "docker" {
  host = "npipe:////.//pipe//docker_engine"
}

resource "docker_image" "nginx" {
  name = "nginx:latest"
  keep_locally = false
}

resource "docker_container" "nginx" {
  image = docker_image.nginx.latest
  name = "tutorial"
  ports {
    internal = 80
    external = 8000
  }
}

##

Downloads a plugin that allows Terraform to interact with provider (ex. Docker).

terraform init

Provision resources (Ex. NGINX server container)

terraform apply

Stop the container and destroy the resources

terraform destroy

Azure Provider

Configure the Azure provider

1/ main.tf

# Terraform settings, including the required providers
# Terraform will use to provision your infrastructure.

terraform {
  required_providers {
  azurerm = {
    source = "hashicorp/azurerm"
    version = "~> 2.65"
  }
}

required_version = ">= 1.1.0"
}

# The provider block configures the specified provider
provider "azurerm" {
  features {}
}

# define components of your infrastructure.
resource "azurerm_resource_group" "rg" {
  name = var.resource_group_name
  location = "westus2"
}

variables.tf

  variable "resource_group_name" {
  default = "myTFResourceGroup"
}

outputs.tf

  output "resource_group_id" {
  value = azurerm_resource_group.rg.id
}

Format document

terraform fmt

Validate document

terraform validate

Apply:

az login
terraform apply

When you apply your configuration, Terraform writes data into a file called terraform.tfstate

Inspect the current state

terraform show terraform state list

Inspect the current state

terraform show

terraform state terraform state list