Why Choose This Project?
This project demonstrates how to build a highly available and fault-tolerant infrastructure using AWS Auto Scaling and Elastic Load Balancer (ELB). It's perfect for ensuring your applications remain available even during server failures, traffic spikes, or maintenance windows — all while automatically scaling based on demand.
Ideal for e-commerce websites, SaaS platforms, real-time apps, and any system requiring uptime, performance, and reliability.
What You Get
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Auto-scalable infrastructure that reacts to load
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Load balancing across multiple availability zones
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Redundancy and failover across instances
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Health checks and automated instance replacement
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Cost-optimized resource utilization
Key Features
| Feature |
Description |
| Elastic Load Balancer (ELB) |
Distributes incoming traffic to healthy instances |
| Auto Scaling Group (ASG) |
Automatically scales instances in/out |
| Multi-AZ Deployment |
Instances span across availability zones |
| Health Checks |
ELB and ASG monitor and replace unhealthy instances |
| Launch Templates |
Reusable EC2 config (AMI, instance type, key pairs) |
| Fault Tolerance |
Automatic replacement of failed instances |
| Elasticity |
Adjusts capacity based on real-time demand |
| Monitoring |
CloudWatch metrics and alerts for CPU, memory, etc. |
Technology Stack
| Layer |
Tools/Technologies |
| Compute |
Amazon EC2 |
| Scaling |
AWS Auto Scaling |
| Load Balancing |
Elastic Load Balancer (ALB/NLB/CLB) |
| Monitoring |
Amazon CloudWatch |
| Networking |
VPC, Subnets, Security Groups |
| Storage |
Amazon EBS / S3 |
| Automation |
Launch Templates / Auto Scaling Policies |
AWS Services Used
| AWS Service |
Purpose |
| EC2 |
Run web/app servers |
| Auto Scaling |
Add/remove EC2 instances based on policies |
| Elastic Load Balancer |
Distribute traffic and health check |
| CloudWatch |
Monitor metrics, set alarms |
| Launch Templates |
Define reusable EC2 configurations |
| S3 (optional) |
Host static assets or logs |
| IAM |
Secure role-based access control |
Working Flow
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User Request Comes In
ELB receives traffic and distributes it to healthy EC2 instances.
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Auto Scaling Monitors Load
Based on CloudWatch metrics (e.g., CPU > 70%), Auto Scaling adds more instances.
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Scale-In on Low Usage
When usage drops below thresholds, Auto Scaling terminates extra instances to save cost.
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Failure Handling
If an instance fails a health check, ELB stops routing to it, and ASG replaces it with a new one.
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Multi-AZ Redundancy
Instances are launched across multiple Availability Zones to maintain uptime even during AZ failure.
Example Use Case
Highly Available E-Commerce Backend
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ELB distributes user traffic to backend EC2 instances
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Auto Scaling scales up when there’s a flash sale or spike in traffic
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If an AZ goes down, traffic automatically shifts to healthy AZs
Main Modules
| Module |
Description |
| Launch Template |
EC2 AMI, instance type, key pair, security group |
| Auto Scaling Group |
Manages instance scaling and replacement |
| Elastic Load Balancer |
Routes traffic and performs health checks |
| CloudWatch Alarms |
Monitor performance and trigger scaling actions |
| IAM Roles |
For secure permissions to interact with services |
Security Features
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IAM Roles & Policies for secure access
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Security Groups for EC2 and ELB to restrict traffic
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SSL Termination at ELB for HTTPS
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Network ACLs for subnet-level protection
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VPC with Public & Private Subnets for secure architecture
Customization
Fully
Security
High
Performance
Fast
Future Updates
Free
Total Buyers
500+
Support
Lifetime
