Cloud Migration Initiative
Project Overview
Led the strategic migration of 81 unified government websites from on-premises infrastructure to AWS cloud, achieving improved reliability, performance, and cost efficiency while maintaining security and compliance requirements.
Challenge
- Aging on-premises infrastructure requiring frequent maintenance
- Limited scalability for traffic spikes
- High operational costs
- Manual deployment processes
- Disaster recovery limitations
- Need for improved availability
Migration Strategy
Phase 1: Assessment (2 months)
- Infrastructure inventory and dependency mapping
- Application compatibility analysis
- Cost-benefit analysis
- Security and compliance review
- Migration roadmap development
Phase 2: Pilot Migration (2 months)
- Selected 5 low-risk websites for pilot
- Tested migration procedures
- Validated performance and security
- Gathered lessons learned
- Refined migration approach
Phase 3: Full Migration (8 months)
- Phased migration of remaining websites
- Minimal downtime approach
- Continuous monitoring and optimization
- Knowledge transfer to team
AWS Architecture
Services Utilized
- Compute: EC2 instances with Auto Scaling
- Load Balancing: Application Load Balancer
- Storage: S3 for static content, EBS for databases
- Database: RDS for managed databases
- CDN: CloudFront for content delivery
- Security: WAF, Security Groups, IAM
- Monitoring: CloudWatch, CloudTrail
- Backup: Automated snapshots and backups
Architecture Highlights
- Multi-AZ deployment for high availability
- Auto-scaling for traffic management
- CloudFront CDN for global performance
- Automated backups and disaster recovery
- Infrastructure as Code (Terraform)
Results Achieved
| Metric | Before | After | Improvement |
|---|---|---|---|
| Uptime | 97% | 99.9% | +2.9% |
| Page Load Time | 3.5s | 1.2s | -66% |
| Infrastructure Costs | Baseline | -30% | 30% reduction |
| Deployment Time | 4 hours | 15 min | -94% |
| Recovery Time (DR) | 24 hours | 1 hour | -96% |
Business Impact
- Improved Reliability: Critical services available 24/7
- Better Performance: Faster page loads for citizens
- Cost Savings: Reduced infrastructure and operational costs
- Scalability: Automatic handling of traffic spikes
- Faster Deployment: CI/CD pipeline for quick updates
- Enhanced Security: AWS security services and best practices
Technical Implementation
Infrastructure as Code
# Terraform example for web server
resource "aws_instance" "web" {
ami = var.ami_id
instance_type = "t3.medium"
tags = {
Name = "WebServer"
Environment = "Production"
}
}
resource "aws_lb" "main" {
name = "main-lb"
load_balancer_type = "application"
subnets = var.subnet_ids
}
Security Measures
- VPC with private and public subnets
- Security groups with least privilege
- WAF rules for common attacks
- Encrypted data at rest and in transit
- Regular security audits
- Compliance with government standards
Monitoring and Alerting
- CloudWatch dashboards for all services
- Automated alerts for anomalies
- Log aggregation and analysis
- Performance monitoring
- Cost monitoring and optimization
Challenges Overcome
- Zero-Downtime Migration
- Solution: Blue-green deployment strategy
- Result: No service interruption
- Data Migration
- Solution: AWS Database Migration Service
- Result: Seamless data transfer
- Team Skills Gap
- Solution: Comprehensive AWS training
- Result: Team became cloud-proficient
- Cost Management
- Solution: Right-sizing, reserved instances, monitoring
- Result: 30% cost reduction
Skills Demonstrated
- Cloud Architecture Design
- AWS Services Expertise
- Migration Planning and Execution
- Infrastructure as Code (Terraform)
- DevOps Practices
- Project Management
- Cost Optimization
- Security and Compliance
Technologies Used
| AWS (EC2, S3, RDS, CloudFront, WAF) | Terraform | Docker | CI/CD | Python | Linux |
Lessons Learned
- Thorough Planning: Assessment phase prevented major issues
- Pilot First: Testing with pilot sites refined approach
- Training Essential: Team training critical for success
- Automation: IaC and CI/CD improved efficiency
- Monitoring: Comprehensive monitoring enabled optimization
Future Enhancements
- Serverless architecture for appropriate workloads
- Container orchestration with EKS
- Advanced cost optimization with Savings Plans
- Multi-region deployment for global reach
Recognition
- Successfully migrated all 81 websites on schedule
- Achieved cost and performance targets
- Zero major incidents post-migration
- Model for other government cloud migrations
Contact
- LinkedIn: shuvo-kumar-shill
- Medium: Cloud Migration Articles
#CloudMigration #AWS #DigitalTransformation #Infrastructure #DevOps #Terraform