DEV Community

Le Vuong
Le Vuong

Posted on • Edited on

Terraform Tutorial: Docker & Azure

#terraform #tutorial #docker #azure

Terraform with Docker

Create main.tf Terraform config file

terraform { required_providers { docker = { source = "kreuzwerker/docker" version = "~> 3.0.1" } } } provider "docker" {} resource "docker_image" "nginx" { name = "nginx" keep_locally = false } resource "docker_container" "nginx" { image = docker_image.nginx.image_id name = "tutorial" ports { internal = 80 external = 8000 } }
Enter fullscreen mode Exit fullscreen mode 
# Initialize the project, which downloads a plugin called a provider that lets Terraform interact with Docker. terraform init # Provision the NGINX server container with apply. Type 'yes' to confirm. terraform apply $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 425d5ee58619 e791337790a6 "nginx -g 'daemon of…" 20 seconds ago Up 19 seconds 0.0.0.0:8000->80/tcp tutorial # To stop the container, run terraform destroy. terraform destroy
Enter fullscreen mode Exit fullscreen mode

Terraform with Azure

Get Started - Azure

# Login to azure az login # set az subscription az account set --subscription "35akss-subscription-id" # create service principal az ad sp create-for-rbac --role="Contributor" --scopes="/subscriptions/<SUBSCRIPTION_ID>" # Set your environment variables export ARM_CLIENT_ID="<APPID_VALUE>" export ARM_CLIENT_SECRET="<PASSWORD_VALUE>" export ARM_SUBSCRIPTION_ID="<SUBSCRIPTION_ID>" export ARM_TENANT_ID="<TENANT_VALUE>" # Write configuration mkdir learn-terraform-azure; cd learn-terraform-azure
Enter fullscreen mode Exit fullscreen mode 
# Configure the Azure provider terraform { required_providers { azurerm = { source = "hashicorp/azurerm" version = "~> 3.0.2" } } required_version = ">= 1.1.0" } provider "azurerm" { features {} } resource "azurerm_resource_group" "rg" { name = "myTFResourceGroup" location = "westus2" }
Enter fullscreen mode Exit fullscreen mode

Explanation

Terraform Block

The terraform {} block contains Terraform settings, including the required providers Terraform will use to provision your infrastructure.

Providers Block

The providerblock configures the specified provider, in this case azurerm. A provider is a plugin that Terraform uses to create and manage your resources.

Resource Block

Use resource blocks to define components of your infrastructure. A resource might be a physical component such as a server, or it can be a logical resource such as a Heroku application.
Resource blocks have two strings before the block: the resource type (azurerm_resource_group) and the resource name (rg). azurerm is the prefix to specify provider. azurerm_resource_group.rg is the full resource ID.

Format and validate the configuration 

# Format terreform config file terraform fmt # validate the config terraform validate # apply config. Type 'yes' to confirm the changes terraform apply # Inspect your state # When you apply your configuration, Terraform writes data into a file called terraform.tfstate. # This file contains the IDs and properties of the resources Terraform created # Your state file contains **sensitive values in plaintext** terraform show > resource "azurerm_resource_group" "rg" { > id = "/subscriptions/c9ed8610-47a3-4107-a2b2-a322114dfb29/resourceGroups/myTFResourceGroup" > location = "westus2" > name = "myTFResourceGroup" > }
Enter fullscreen mode Exit fullscreen mode

To review the information in your state file, use the state command.

$ terraform state list $ terraform state $ terraform destroy
Enter fullscreen mode Exit fullscreen mode

Top comments (0)