✅ Use Terraform to Deploy the Same App on AWS & Azure
✅ Implement Cross-Cloud Traffic Routing
✅ Set Up Load Balancing Between AWS & Azure

📌 Project Scenario

A growing e-commerce startup wants to improve availability and fault tolerance by deploying its web application on both AWS and Azure. The goal is to:

🔹 Ensure high availability by deploying the same application in both AWS and Azure.
🔹 Implement cross-cloud traffic routing to optimize performance and failover.
🔹 Set up a load balancer to distribute traffic dynamically between both cloud providers.

To achieve this, we will use Terraform for Infrastructure as Code (IaC) to automate the deployment and configuration.

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📌 Step-by-Step Walkthrough

Step 1: Set Up Terraform for Multi-Cloud Deployment

✅ Terraform installation verification (terraform -v)

✅ AWS CLI & Azure CLI authentication confirmation

🔧 Instructions:

1. Install Terraform

   • Download & install Terraform from Terraform Downloads

   • Run:

       terraform -v
     

     

2. Install AWS CLI & Azure CLI

   • AWS CLI: Install from AWS CLI

   • Azure CLI: Install from Azure CLI

3. Authenticate AWS CLI & Azure CLI

   • AWS CLI Login

       aws configure
     

     

   • Azure CLI Login

       az login
     

     

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Step 2: Define Terraform Configuration for AWS & Azure

✅ Terraform main configuration file (main.tf)
✅ AWS & Azure provider block definitions

🔧 Instructions:

1. Create a Project Directory & Navigate Into It

    mkdir multi-cloud-project && cd multi-cloud-project
   

2. Create a Terraform Configuration File (main.tf)

    hclCopyEditterraform {
      required_providers {
        aws = {
          source  = "hashicorp/aws"
          version = "~> 5.0"
        }
        azurerm = {
          source  = "hashicorp/azurerm"
          version = "~> 3.0"
        }
      }
    }
   
    provider "aws" {
      region = "us-east-1"
    }
   
    provider "azurerm" {
      features {}
      subscription_id = "<your_subscription_id>"
    }
   

3. Initialize Terraform

    terraform init
   

   ✅ Expected Output: Terraform initialized successfully

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Step 3: Deploy Web App in AWS & Azure

✅ AWS EC2 instance configuration
✅ Azure Web App configuration

🔧 Instructions:

1. Add AWS EC2 Instance in main.tf

    hclCopyEditresource "aws_instance" "web" {
      ami           = "ami-0c55b159cbfafe1f0"
      instance_type = "t2.micro"
      tags = {
        Name = "MultiCloudAWS"
      }
    }
   

2. Add Azure Web App in main.tf

    hclCopyEditresource "azurerm_app_service" "web" {
      name                = "multicloudazureweb"
      location            = "East US"
      resource_group_name = "MultiCloud-RG"
      app_service_plan_id = azurerm_app_service_plan.example.id
    }
   

3. Apply Terraform Configuration

    terraform apply
   

   ✅ Expected Output: Both AWS & Azure web apps deployed

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Step 4: Configure Cross-Cloud Traffic Routine

✅ DNS records setup for AWS & Azure
✅ Load balancer routing configuration

🔧 Instructions:

1. Register Domain & Configure Route 53 (AWS)

   • Navigate to AWS Route 53

   • Create a hosted zone

   • Add an A record pointing to AWS EC2

2. Set Up Azure Traffic Manager

   • Go to Azure Portal → Traffic Manager

   • Create a new Traffic Manager Profile

   • Add two endpoints:

     • AWS EC2 Public IP

     • Azure Web App URL

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Step 5: Set Up Load Balancer Across AWS & Azure

✅ AWS ELB configuration
✅ Azure Load Balancer configuration

🔧 Instructions:

1. AWS Load Balancer Setup

   • Go to AWS Console → EC2 → Load Balancers

   • Create Application Load Balancer (ALB)

   • Target: AWS EC2 Instance

2. Azure Load Balancer Setup

   • Go to Azure Portal → Load Balancers

   • Create a new Public Load Balancer

   • Target: Azure Web App

3. Test Cross-Cloud Load Balancing

   • Open a browser & enter the domain

   • It should direct traffic between AWS & Azure dynamically

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🎯 Final Outcome

✅ Terraform automates AWS & Azure deployment
✅ Cross-cloud routing ensures availability
✅ Load balancing distributes traffic across both clouds