Scaling .NET Applications on AWS with High Availability and Auto Scaling
Migrating a critical .NET workload to AWS to eliminate downtime, improve scalability and create a resilient cloud-native architecture.
The .NET-based application experienced downtime due to high workload and limited scalability in its existing environment.
To resolve these issues, the application was migrated to AWS cloud infrastructure, enabling a more flexible and resilient architecture.
The new setup incorporated:
- • Elastic Load Balancer
- • Auto Scaling
- • Multi-AZ EC2 deployment
- • Security hardening
- • Enhanced monitoring and alerting
This improved:
- • Performance
- • High availability
- • Reliability
- • Security
- • Operational efficiency
Gaps in the previous monitoring system were resolved through improved observability and proactive alerting.
About Agilepulse Technology Pvt Ltd
Agilepulse Technology Private Limited is a newly established private company in India incorporated on 30 August 2024 and based in Kolkata, West Bengal.
It operates as a non-government unlisted company with a small capital base and falls under other financial activities, likely providing tech-enabled financial solutions.
Client Challenges
Solution Offered
Cloud Migration
- • .NET application re-hosted on AWS
- • Scalable secure highly available environment
Traffic Distribution
- • Elastic Load Balancer
- • Even traffic distribution
- • Prevent overload
- • Improve application availability
Elastic Scaling
- • Auto Scaling Group
- • Automatic scale up/down based on demand
- • Handle traffic spikes
- • Cost optimization
Security
- • Security groups
- • Network controls
- • Best-practice hardening
- • Protected infrastructure
Monitoring
- • Amazon CloudWatch
- • Metrics tracking
- • Alarm configuration
- • Faster issue detection
- • Improved alerting
Resilient Architecture
- • Fault tolerant architecture
- • Reduced downtime
- • Business continuity
Detailed Solution Architecture
1. Network Layer (VPC Design)
Dedicated VPC with public subnets for the load balancer and private subnets for application servers. Internet Gateway enables public-facing traffic while NAT Gateway provides controlled internet access for backend instances.
2. Traffic Management Layer
Application Load Balancer distributes HTTP/HTTPS traffic across instances with continuous health checks, routing requests only to healthy instances for optimal performance and availability.
3. Compute Layer
Amazon EC2 instances host the .NET application in a Multi-AZ deployment. Auto Scaling adjusts capacity based on CPU utilization, ensuring high availability and cost optimization during traffic fluctuations.
4. Security Layer
Security Groups and Network ACLs control inbound and outbound traffic. IAM enforces least-privilege access controls. All traffic is encrypted with HTTPS/TLS to protect data in transit.
5. Monitoring and Logging
Amazon CloudWatch tracks CPU, memory, and network metrics with configured alarms for threshold breaches. Centralized log management provides complete operational visibility for faster issue detection and resolution.
6. Storage Layer
Amazon S3 provides durable, cost-effective storage for static content, backups, and application logs with lifecycle policies for automated cost management.
7. High Availability and Fault Tolerance
Multi-AZ deployment ensures automatic failover capabilities. The load balancer reroutes traffic to healthy instances across availability zones, maintaining continuous service availability.
Solution Architect Diagram
Key AWS Services Used
Benefits & Impact
Reduced
Downtime
Auto
Scaling Enabled
Faster
Response Times
High
Availability Architecture
Before vs After Transformation
Before
- ✗Frequent downtime
- ✗Manual scaling
- ✗Limited visibility
- ✗Security gaps
- ✗Performance issues
After
- Highly available infrastructure
- Automated scaling
- Strong observability
- Enhanced security
- Optimized performance
Business Impact
- Better operational efficiency
- Reduced infrastructure risk
- Improved service continuity
- Cloud cost efficiency
- Stronger growth readiness
Final Outcome
Migration of the .NET application to AWS resulted in highly available, scalable and secure infrastructure.
Delivered:
- Downtime significantly reduced
- Continuous availability during peak traffic
- Seamless workload scaling
- Faster response times
- Better user experience
- Stronger monitoring and alerting
- Enhanced security posture
- Reduced manual intervention through automation
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