AWS Automated Failover & Edge Security Platform
Fully automated AWS failover platform using Terraform IaC, AWS Lambda, EventBridge, and Cloudflare WAF/DDoS protection.
Year: 2025 | Platform: AWS + Cloudflare | Infrastructure-as-Code: Terraform
📑 Case Study Contents
1. Overview
Client: Enterprise requiring production-grade AWS architecture with high availability and edge security.
Platforms: AWS (EC2, Lambda, EventBridge, SNS), Cloudflare (WAF, DDoS), Terraform
Timeline: 12 weeks from design to production deployment.
Designed and implemented a fully automated AWS failover platform using Terraform Infrastructure-as-Code (IaC) to ensure repeatable, auditable deployments. The architecture leveraged AWS Lambda and EventBridge for event-driven automation, enabling rapid detection of service degradation and triggering automated failover actions.
2. The Challenge
The environment required a resilient, production-grade AWS architecture capable of maintaining service availability during outages while also defending public-facing endpoints from modern threats such as DDoS attacks, malicious bot traffic, and web application exploits. The organization needed faster incident detection and response, as manual recovery procedures were too slow and created unacceptable downtime risk.
Key challenges included:
- Manual failover procedures took 30+ minutes, creating unacceptable downtime risk
- No automated health detection or self-healing capabilities
- Limited DDoS protection for public-facing endpoints
- Inconsistent edge security across multiple services
- Lack of real-time alerting for service degradation
- No Infrastructure-as-Code for repeatable deployments
3. The Solution
I designed and implemented a fully automated AWS failover platform using Terraform Infrastructure-as-Code (IaC) to ensure repeatable, auditable deployments. The architecture leveraged AWS Lambda and EventBridge for event-driven automation, enabling rapid detection of service degradation and triggering automated failover actions.
Key Components
AWS Lambda + EventBridge for automated health checks and failover triggers
Seamless workload shifting between instances based on availability
Cloudflare WAF + DDoS protection filtering malicious traffic
SNS notifications for operations team awareness and escalation
I implemented bidirectional EC2 failover, allowing workloads to shift between instances seamlessly depending on availability conditions. To secure the edge layer, I integrated Cloudflare WAF and DDoS protection, ensuring malicious traffic was filtered before reaching AWS resources. I also deployed SNS alerting for real-time notification to operations teams, enabling rapid awareness and escalation.
4. Architecture Highlights
Terraform Infrastructure-as-Code: All infrastructure defined as code, enabling version control, peer review, and repeatable deployments across environments.
EventBridge Health Monitoring: Automated health checks trigger Lambda functions when service degradation is detected, initiating failover without human intervention.
Cloudflare Integration: WAF rules and DDoS mitigation at the edge, blocking malicious traffic before it reaches AWS infrastructure.
Multi-AZ Redundancy: Resources distributed across multiple Availability Zones for resilience against zone-level failures.
5. Measurable Results
Availability & Performance
- ✓ Achieved 99.9% uptime through automated recovery workflows
- ✓ Reduced incident response time by 70% (from 30+ minutes to under 10 minutes)
- ✓ Eliminated manual failover steps completely
- ✓ Improved Mean Time To Recovery (MTTR) by 75%
Security & Compliance
- ✓ Strengthened security posture through integrated WAF filtering
- ✓ Mitigated DDoS attacks at the edge before reaching AWS
- ✓ Scalable, repeatable infrastructure model (Terraform-based)
- ✓ Compliant-ready architecture with full auditability
6. Business Impact
The automated failover platform transformed the client's disaster recovery posture from manual, error-prone procedures to fully automated, self-healing infrastructure. Operations teams no longer need to be paged for routine failover events, and leadership has confidence in the platform's ability to maintain service availability during unexpected outages.
7. Technologies & Tools
8. Client Testimonial
“Golden Ratio Consulting delivered a game-changing automated failover platform. Our incident response time dropped by 70%, and we now have confidence that our systems will recover automatically during outages. The Terraform-based approach means we can replicate this architecture across environments with ease.”
— VP of Infrastructure, Enterprise Technology Company