Amazon Elastic Kubernetes Service (EKS) is a fully managed Kubernetes service offered by AWS, making it easier to deploy, manage, and scale containerized applications using Kubernetes. Setting up an EKS cluster manually can be a time-consuming and error-prone process. To simplify this, many organizations turn to Infrastructure as Code (IaC) tools like Terraform for automating the provisioning and configuration of EKS clusters. In this blog, we will walk you through the process of automating the setup of an AWS EKS cluster using Terraform.
Why Deploy with Terraform
Deploying an AWS EKS cluster manually involves numerous steps and can be prone to human errors. This is where Terraform, an Infrastructure as Code (IaC) tool, comes to the rescue. But why should you choose Terraform for deploying your EKS clusters? Here are some compelling reasons:
- Consistency: Manual deployments can lead to inconsistencies; Terraform guarantees uniform infrastructure provisioning.
- Scalability: Easily scale your EKS cluster to accommodate changing workloads.
- An AWS account.
- Valid AWS access credentials or an IAM role for Terraform execution
- Terraform installed on your local machine.
Step 1: Prepare Your Environment
First, make sure you have AWS CLI and Terraform installed on your computer. You can find installation instructions on their respective websites. Once installed, configure your AWS CLI with your AWS access credentials.
Step 2: Create a Project Folder
To keep your work organized, create a new folder for your EKS project. You can name it anything you like, but for this example, we’ll use “my-eks-cluster.”
Step 3: Define Your EKS Configuration
Instead of delving deeply into complex code, let’s focus on high-level steps to automate EKS cluster setup. You can use Terraform modules to simplify this process.
Terraform needs to know where to create your resources. This is called the provider configuration.
- VPC and EKS Configuration
Terraform modules can help you create the Virtual Private Cloud (VPC) and EKS cluster more easily.
Step 4: Initialize and Apply the Configuration
Now, it’s time to set up your EKS cluster:
- Open your terminal.
- Go to your project’s folder.
- To prepare Terraform, run “terraform init”
- To create your EKS cluster and related resources, run terraform apply. Please confirm the changes by typing ‘yes.’
Step 5: Checking Your EKS Cluster
Now that your cluster is created, it’s time to see if everything is working fine. You’ll get a list of your worker nodes, confirming that your cluster is up and running smoothly.
Step 7: Clean Up (Optional)
When you’re done with your EKS cluster, you can remove all the resources created by Terraform.
Benefits of Automating AWS EKS with Terraform
- Infrastructure as Code (IaC): Terraform lets you define your infrastructure in code, making it more predictable, version-controlled, and understandable. This lowers human error and improves team collaboration.
- Consistency: Manual provisioning frequently results in configuration drift, which causes disparities between environments. Terraform ensures consistency, making sure your infrastructure is consistent throughout development, staging, and production.
- Replicability: Terraform allows you to replicate your whole EKS cluster and associated resources with a single command. This is particularly beneficial for disaster recovery, testing, and scaling your system.
- Scalability: Terraform makes it easy to adjust the size of your EKS cluster based on changing workloads. You can efficiently scale up or down by modifying your configuration.
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Automating AWS EKS cluster setup with Terraform streamlines Kubernetes management. Terraform’s Infrastructure as Code simplifies the process, ensuring consistency, scalability, and reducing errors. It offers the benefits of version control, reproducibility, and adaptability, making it a reliable and efficient choice for deploying containerized applications. Terraform empowers you to manage AWS EKS with precision and confidence.