Getting Started with Terraform

Terraform is an Infrastructure as Code (IaC) tool that allows you to define and provision cloud resources in a declarative way. It supports AWS, Azure, Google Cloud, DigitalOcean, Kubernetes, and many more.

Step 1: Install Terraform

Follow the installation guide based on your OS:

• Ubuntu/Debian

  sudo apt update && sudo apt install -y terraform
  

• MacOS

  brew install terraform
  

• Windows (via Chocolatey)

  choco install terraform
  

Verify the installation:

terraform version

Step 2: Create a Terraform Project

1. Create a new directory for your Terraform configuration

   mkdir terraform-project && cd terraform-project
   

2. Create a Terraform configuration file

   touch main.tf
   

Step 3: Write Your First Terraform Configuration

Open main.tf and define a basic DigitalOcean Kubernetes cluster:

provider "digitalocean" {
  token = var.do_token
}

variable "do_token" {}

resource "digitalocean_kubernetes_cluster" "my_cluster" {
  name   = "my-k8s-cluster"
  region = "nyc3"
  version = "1.29.0-do.0"

  node_pool {
    name       = "worker-pool"
    size       = "s-2vcpu-4gb"
    node_count = 2
  }
}

Step 4: Initialize Terraform

Run the following command:

terraform init

This downloads the required Terraform provider plugins.

Step 5: Preview the Changes

terraform plan

This will show the resources Terraform will create.

Step 6: Apply the Changes

terraform apply

Terraform will ask for confirmation. Type “yes” to proceed.

Once completed, you will have a Kubernetes cluster running on DigitalOcean! 🎉

Step 7: Destroy the Infrastructure (Optional)

If you want to delete everything created by Terraform, run:

terraform destroy

If you’re getting the error “Unable to locate package terraform”, it means that Terraform is either not available in your package repositories or your package list is outdated. Follow these steps to install Terraform properly based on your OS:

Ubuntu/Debian Installation

Step 1: Update Package List

sudo apt update && sudo apt upgrade -y

Step 2: Install Required Packages

sudo apt install -y gnupg software-properties-common

Step 3: Add HashiCorp Repository

wget -O- https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list

Step 4: Install Terraform

sudo apt update
sudo apt install -y terraform

Step 5: Verify Installation

terraform version

CentOS/RHEL Installation

Step 1: Install Yum Utilities

sudo yum install -y yum-utils

Step 2: Add HashiCorp Repository

sudo yum-config-manager --add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo

Step 3: Install Terraform

sudo yum install -y terraform

Step 4: Verify Installation

terraform version

MacOS Installation

Use Homebrew:

brew tap hashicorp/tap
brew install hashicorp/tap/terraform

Windows Installation

1. Download the latest Terraform binary from Terraform Downloads.
2. Extract it and add the Terraform executable to your system PATH.

After installation, retry:

terraform init
terraform apply

Let me know if you need more help! 🚀