Modernizing a Windows-Based ERP Application: Migrating from Elastic Beanstalk to Amazon EKS for Scalability, Reliability,
and Observability

The client operated a mission-critical Windows-based ERP application hosted on Amazon Elastic Beanstalk with Amazon RDS (MS SQL Server) as the backend database. As business usage increased, the platform began experiencing serious scalability, reliability, and performance issues. Key challenges included: Poor scalability during peak business hours Limited control over auto-scaling behavior in Elastic Beanstalk Inefficient load balancing, leading to uneven traffic distribution Application slowdowns directly impacting end customers Frequent performance degradation without clear root cause No deep application-level monitoring or APM visibility Limited observability into infrastructure and application health Operational firefighting impacting business continuity The ERP system was customer-facing and business-critical, so performance issues were directly affecting customer satisfaction and revenue. The client needed a modern, scalable, and observable platform without rewriting the entire ERP application.

We designed and executed a phased ERP modernization strategy, migrating from Elastic Beanstalk to a containerized Kubernetes (Amazon EKS) platform, while keeping the Windows-based ERP application intact. Key execution steps included: 🔹 Application Modernization (Without Rewriting ERP) Containerized the Windows-based ERP application using Windows containers Standardized application runtime environments for consistency Enabled independent scaling of ERP services 🔹 Platform Migration: Elastic Beanstalk → Amazon EKS Designed a production-grade Amazon EKS cluster Migrated workloads from Elastic Beanstalk to Kubernetes Implemented Kubernetes-native auto-scaling (HPA) for precise scaling control Replaced legacy load balancing with: Application Load Balancer Kubernetes Ingress for intelligent traffic routing 🔹 Database Stability & Security Retained Amazon RDS for MS SQL Server for data integrity Tuned database performance and connection handling Implemented IAM-based access control and secure connectivity 🔹 Identity & Access Management Implemented IAM Roles for Service Accounts (IRSA) Removed static credentials from application code Enforced least-privilege access across ERP services 🔹 Observability & Monitoring (Major Gap Resolved) To eliminate blind spots, we implemented full-stack observability: Application Performance Monitoring (APM) to track: API response times Slow transactions Bottlenecks inside ERP workflows Infrastructure Monitoring using Prometheus & CloudWatch Dashboards (Grafana) for real-time visibility Centralized logging for faster troubleshooting Proactive alerts for performance and availability issues 🔹 DevOps & Reliability Improvements Infrastructure provisioned using Terraform (IaC) Standardized deployment pipelines Enabled rolling updates and zero-downtime releases Reduced manual intervention and operational risk

The ERP modernization delivered immediate and measurable improvements across performance, stability, and customer experience. Results achieved: Significant improvement in ERP application performance Eliminated customer-facing slowdowns during peak usage Reliable and predictable auto-scaling behavior Improved load distribution across application instances Faster issue detection and root-cause analysis using APM Reduced operational firefighting and downtime risk Increased platform stability and customer satisfaction Future-ready architecture supporting further modernization The client now operates a modern, scalable, and observable ERP platform capable of supporting business growth without compromising customer experience. Modernization doesn’t always mean rewriting applications. By moving the platform from Elastic Beanstalk to Kubernetes, the ERP system gained scalability, resilience, and deep observability—without disrupting the business.