Enterprise Cloud Migration: Transitioning Critical Services to AWS
Challenge: The client operated a legacy on-premises GIS (Geographical Information System) and SQL Server environment that suffered from frequent downtime during seasonal demand spikes. The physical hardware was approaching end-of-life, and scaling it required massive capital expenditure.
Solution: Led the migration strategy and execution to transition the workload to Amazon Web Services (AWS). Provisioned redundant architectures with EC2, Elastic Load Balancing (ELB), and Amazon RDS. Implemented Active Directory Single Sign-On (SSO) and utilized Terraform to define the entire setup as Infrastructure as Code (IaC).
Outcome: Achieved 99.99% uptime, reduced hosting costs by 30% through automated resource scheduling, and established a repeatable, version-controlled deployment pipeline.
Project Overview
The customer required a zero-downtime migration of a mission-critical mapping and logistics database.
Modernization Strategy
Instead of a simple “lift-and-shift,” Telali Ltd modernized the networking and database layer:
- Infrastructure as Code (IaC): Every network resource (VPCs, subnets, route tables, security groups) and instance was defined using Terraform modules.
- Database Replatforming: Migrated raw SQL servers to Amazon RDS with Multi-AZ deployment, establishing automatic failover and point-in-time recovery.
- Single Sign-On (SSO) Integration: Federated the AWS environment with the client’s corporate Active Directory, keeping security policies consistent.
Results
The transition was completed over a single weekend with zero service disruption. The system now automatically scales during business peaks, lowering running costs during off-peak hours.