selvanayaki678 / terraform-aws

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

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.