TERRAFORM

1. Type virtual machines in the search.
    
2. Under Services, select Virtual machines.
3. In the Virtual machines page, select Add. The Create a virtual machine page opens.
4. In the Basics tab, under Project details, make sure the correct subscription is selected and then choose to Create new resource group. Type myResourceGroup for the name.*.
5. Under Instance details, type myVM for the Virtual machine name, choose East US for your Region, and choose Ubuntu 18.04 LTS for your Image. Leave the other defaults.
6. Under Administrator account, select SSH public key, type your user name, then paste in your public key. Remove any leading or trailing white space in your public key.
7. Under Inbound port rules > Public inbound ports, choose Allow selected ports and then select SSH (22) and HTTP (80) from the drop-down.
8. Leave the remaining defaults and then select the Review + create button at the bottom of the page.
9. On the Create a virtual machine page, you can see the details about the VM you are about to create. When you are ready, select Create.
    

It will take a few minutes for your VM to be deployed. When the deployment is finished, move on to the next section.

Connect to virtual machine

Create an SSH connection with the VM.

1. Select the Connect button on the overview page for your VM.
2. In the Connect to virtual machine page, keep the default options to connect by IP address over port 22. In Login using VM local account a connection command is shown. Select the button to copy the command. The following example shows what the SSH connection command looks like:

bashCopy

ssh azureuser@10.111.12.123

    3.Using the same bash shell you used to create your SSH key pair (you can reopen the Cloud Shell by selecting >_ again or going to https://shell.azure.com/bash), paste the SSH connection command into the shell to create an SSH session.

Usage/Deployment Instructions

Step 1:  Access the Terraform in Azure Marketplace and click on Get it now button.

Click on Continue and then click on Create.

Step 2: Now to create a virtual machine, enter or select appropriate values for zone, machine type, resource group and so on as per your choice.

Click on Review + create.

Step 3:  The below window confirms that VM was deployed.

Step 4: Open putty and connect with your machine. Add IP address of the running virtual machine.

Step 5: Login with user name and password that you provided during machine creation.

Step 6: Check the version of terraform installed on your system.

$ terraform –version

Step 7: Using Terraform to Manage Infrastructure.

Now that terraform is installed, let’s create a test project.

$ mkdir projects

$ cd projects

Create Terraform main configuration file.

$ touch main.tf

I’m doing a Test with AWS Provider but you can use other Providers for your projects. My terraform configuration provider section is as below.

$ vim main.tf

# Provider

 provider “aws” {

   access_key = “”

   secret_key = “”

   region = “us-west-1”

 }

Paste your AWS Access Key and Secret Key inside the access_key and secret_keysections respectively. You can also configure your AWS access credentials with AWS CLI tool.

When done, run terraform init to initialize a Terraform working directory.

$ terraform init

Terraform will automatically download provider configured to .terraform directory.

Step 8: Let’s now add resource section to create AWS VPC and Subnet resources by editing the main.tf file.

$ vim main.tf

# Provider

 provider “aws” {

   access_key = “”

   secret_key = “”

   region = “”

 }

# Retrieve the AZ where we want to create network resources

data “aws_availability_zones” “available” {}

# VPC Resource

resource “aws_vpc” “main” {

  cidr_block = “10.11.0.0/16”

  enable_dns_support = true

  enable_dns_hostnames = true

  tags {

    Name = “Test-VPC”

  }

  tags {

    Environment = “Test”

  }

}

# AWS subnet resource

resource “aws_subnet” “test” {

 vpc_id = “${aws_vpc.main.id}”

 cidr_block = “10.11.1.0/24”

 availability_zone = “${data.aws_availability_zones.available.names[0]}”

 map_public_ip_on_launch = “false”

 tags {

   Name = “Test_subnet1”

 }

}

Save the file after adding resource definitions and setting AWS variables then generate and show an execution plan.

$ terraform plan

Finally build your Infrastructure with Terraform using terraform apply.

$ terraform apply

Confirm changes to be made and type “yes” to initiate modifications.

A successful terraform run should print success message at the end.

Terraform state is saved to ./terraform.tfstate but the backend can be changed. You can confirm Infrastructure changes from AWS console.

Step 9: Destroying Terraform Infrastructure

We have confirmed that our Terraform installation on Ubuntu 22.04/20.04/18.04 is working as expected, now destroy Terraform-managed infrastructure by running terraform destroy command.

$ terraform destroy

Enjoy your Application.