EKS and RDS Creation in AWS using Terraform

Overview:

This repo is having Terraform script that automates the creation of an Amazon Elastic Kubernetes Service (EKS) cluster and RDS instance on AWS. The script covers the following key components:

1. AWS Configuration in Terraform:

   • Ensure you have an AWS account and have created an IAM user with administrator permissions.
   • Generate the Access Key ID and Secret Access Key for this IAM user.

2. Jenkins Integration with AWS:

   • Add the IAM user's Access Key ID and Secret Access Key as Jenkins credentials.
   • In the Jenkinsfile, set these credentials as environment variables.

   Example Jenkinsfile snippet:

   pipeline {
    agent any 
        environment {
            AWS_ACCESS_KEY_ID=credentials('aws_access_key')
            AWS_SECRET_ACCESS_KEY=credentials('aws_access_key_value')
        }
   }

3. Terraform State Management:

   • The Terraform state file is stored in an S3 bucket for better collaboration and consistency across your team.
   • Ensure that you have configured the AWS provider with the necessary credentials.

   Example Terraform Configuration:

      terraform {
      backend "s3" {
        bucket = "terraform-statefile-s3-aws"
        key    = "state/eks-cluster.tfstate"
        region = "us-east-2"
      }
    }

4. EKS cluster creation

   • EKS Cluster:
     • VPC and 2 public subnets are created for the EKS cluster.
     • IAM roles are created and attached to the the AmazonEKSClusterPolicy.
     • The EKS cluster is created utilizing the specified IAM roles and VPC.
   • Node Group:
     • IAM roles with AmazonEKSWorkerNodePolicy and AmazonEKS_CNI_Policy are created.
     • EKS node group is configured to utilize the created IAM roles.

5. RDS Instance creation

   • Creating an AWS RDS instance with Terraform involves setting up a VPC, two public subnets in different zones, and a database subnet group.
   • The RDS instance, specifically for MySQL, is configured using Terraform, defining details like instance ID, username, and password.
   • Additionally, a security group is established to permit all required incoming connections, ensuring accessibility to the RDS instance.

Usage:

1. Setup Terraform:
   • Install Terraform locally
2. Terraform steps :

   • Added all terraform commands in jenkins file

   • Terraform init -- This initiates the download of required providers.

   • Terraform plan -- This command reveals the anticipated resources that will be created.

   • terraform apply -- This command parameterized within the pipeline, can be chosen to be executed or skipped, It results in the creation of resources in AWS.

   • Terraform destroy -- This command, which can be customized in the pipeline, lets you decide whether to run it or not. If executed, it starts cleaning up resources.