I completed a full High Availability (HA) WordPress architecture on AWS, built using production-grade DevOps patterns across multiple Availability Zones.
Core Architecture:
• Multi AZ VPC with public + private subnets, IGW, NAT
• Application Load Balancer distributing traffic across AZ a and AZ b
• Auto Scaling Group using a Launch Template with automated user data to install/configure WordPress
• RDS Multi AZ MySQL deployed in private subnets with SG to SG access only
• Security Group chaining enforcing strict east-west flow: Internet → ALB → EC2 → RDS
Automation & Self Healing:
• EC2 instances bootstrap WordPress automatically (runtime install, config, DB connection)
• ASG replaces failed instances without manual intervention
• ALB health checks ensure only healthy nodes receive traffic
HA Validation:
• Terminated EC2 instances → ASG launched replacements automatically
• Simulated AZ disruption → ALB continued serving traffic from the remaining AZ
• WordPress remained fully available throughout all tests
This project demonstrates end-to-end HA design: resilient networking, automated compute, fault-tolerant database, and real failure testing—key capabilities for modern Cloud/DevOps engineering.
Top comments (0)