Infrastructure as Code - Elasticsearch

Introduction

Infrastructure as Code (IaC) is a key DevOps practice that involves managing and provisioning computing infrastructure through machine-readable definition files, rather than physical hardware configuration or interactive configuration tools. IaC enables you to automate and manage your infrastructure with code, making it easy to deploy and maintain. In this tutorial, we will focus on setting up and managing Elasticsearch using IaC.

Prerequisites

Before we start, ensure you have the following installed:

• Terraform
• AWS CLI
• An AWS account

Step 1: Setting Up Terraform

Terraform is an open-source IaC tool that allows you to define your infrastructure using a high-level configuration language. To install Terraform, follow the instructions on the official Terraform website.

Step 2: Configuring AWS CLI

The AWS Command Line Interface (CLI) is a unified tool to manage your AWS services. To install and configure it, follow the instructions on the AWS CLI website.

Step 3: Defining the Elasticsearch Infrastructure using Terraform

Create a new directory for your Terraform configuration files and navigate into it:

Create a main.tf file with the following content:

resource "aws_elasticsearch_domain" "example" {
  domain_name           = "example-domain"
  elasticsearch_version = "7.10"

  cluster_config {
    instance_type = "m4.large.elasticsearch"
  }

  ebs_options {
    ebs_enabled = true
    volume_size = 10
  }

  access_policies = <
            

Initialize Terraform:

Apply the configuration:

Step 4: Verifying the Deployment

After the Terraform apply command completes, you can verify the deployment by visiting the AWS Management Console and navigating to the Elasticsearch Service. You should see your Elasticsearch domain listed.

Step 5: Managing Elasticsearch with IaC

With IaC, you can easily manage updates and changes to your Elasticsearch infrastructure. Simply modify your main.tf file with the required changes and run terraform apply again to apply the changes.

Conclusion

In this tutorial, we covered the basics of Infrastructure as Code and how to manage Elasticsearch using Terraform. By adopting IaC practices, you can achieve greater consistency, repeatability, and scalability for your infrastructure deployments.