Hybrid Cloud Setup: On-Premise to AWS using Terraform

This project focuses on setting up a Hybrid Cloud environment by connecting an on-premise data center with AWS Cloud using AWS VPN or AWS Direct Connect. The goal is to enable seamless workload operations between on-prem and AWS.

Project Overview

• Infrastructure as Code (IaC): Use Terraform to automate the deployment.
• Hybrid Cloud Connectivity: Establish a VPN or Direct Connect between on-premise and AWS.
• Workload Deployment: Deploy an application that spans both environments.
• Security & Access Control: Secure traffic using IAM, Security Groups, and Network ACLs.
• Monitoring & Logging: Implement CloudWatch, CloudTrail, and Prometheus/Grafana for observability.

Project Architecture

1. Hybrid Cloud Connectivity

• AWS VPN Setup:
  • Create a Customer Gateway (for on-prem router).
  • Create a Virtual Private Gateway (VGW) in AWS.
  • Establish an IPSec VPN Tunnel.
  • Configure on-prem router to establish VPN connectivity.

OR

• AWS Direct Connect Setup (Alternative to VPN)
  • Order a Direct Connect (DX) connection.
  • Configure a DX Gateway and attach it to AWS VPC.
  • Use BGP Routing for private connectivity.

2. AWS VPC & Networking

• Create a VPC with private/public subnets.
• Deploy NAT Gateway for outbound internet access.
• Implement Security Groups & NACLs to control access.

3. On-Premises Setup

• Use a local VM or bare-metal server simulating an on-prem workload.
• Install and configure VPN Client if using a software-based VPN.
• Configure local network routing to allow private connectivity.

4. Hybrid Workload Deployment

• On-Prem App Server: Runs a legacy application.
• AWS EC2 Instance: Runs the cloud component of the application.
• AWS RDS Database: Shared between both environments.
• AWS S3: Stores shared files for hybrid access.

5. Security & Compliance

• IAM roles with least privilege access.
• VPC Flow Logs to monitor traffic.
• AWS CloudTrail for auditing.
• VPN/Direct Connect logs for troubleshooting.

Implementation Steps

1. Prepare Terraform Configuration
2. Deploy On-Prem Components
3. Deploy AWS Infrastructure using Terraform

terraform init
tf plan
terraform apply

4. Deploy Application Workloads
5. Validate & Test Hybrid Setup

Implementation Steps

1. Prepare Terraform Configuration

Create Terraform files for:

• Networking (VPC, Subnets, VPN, DX)
• Compute Resources (EC2, RDS, S3)
• Security & IAM Policies
• Monitoring & Logging

2. Deploy On-Prem Components

• Configure the Customer Gateway for VPN.
• Deploy local application servers.
• Set up local routing to AWS VPC.

3. Deploy AWS Infrastructure using Terraform

terraform init
terraform plan
terraform apply

• Validate VPN Tunnel/Direct Connect connectivity.
• Test private communication between AWS and on-prem.

4. Deploy Application Workloads

• Launch EC2 instances for cloud-based services.
• Set up AWS RDS for hybrid database.
• Sync application data between on-prem & AWS S3.

5. Validate & Test Hybrid Setup

• Verify connectivity between on-prem and AWS.
• Test application performance & latency.
• Check security logs and monitoring dashboards.

Terraform Code Structure

├── main.tf             # Entry point for Terraform
├── vpc.tf              # AWS VPC, subnets, and route tables
├── vpn.tf              # VPN / Direct Connect setup
├── security.tf         # Security groups, IAM roles, and NACLs
├── compute.tf          # EC2 instances and Auto Scaling Groups
├── database.tf         # RDS and database configuration
├── storage.tf          # S3 setup for shared storage
├── monitoring.tf       # CloudWatch, Prometheus/Grafana setup
├── outputs.tf          # Output values
└── variables.tf        # Input variables for Terraform
    

Expected Outcome

• A secure, reliable connection between on-premises and AWS Cloud.
• Seamless hybrid workload deployment.
• Centralized logging and monitoring for visibility.
• Fully automated infrastructure using Terraform.

Next Steps

• Implement Disaster Recovery (DR) using AWS Backup.
• Optimize costs with EC2 Reserved Instances & Savings Plans.
• Extend hybrid cloud to multi-cloud with Azure/AWS integration.