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Azure Migration and Modernization Blog
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Migrating Application Load Balancer from AWS to Azure Application Gateway

Michael_Bender_MS's avatar
Sep 03, 2025

Accelerate Innovation and Business Growth with Azure

In today’s digital-first world, organizations are reimagining their cloud architectures to drive agility, resilience, and growth. Migrating your application load balancing from AWS Application Load Balancer (ALB) to Azure Application Gateway is more than a technical upgrade—it’s a strategic move to future-proof your business.

Azure Application Gateway delivers enterprise-grade performance, security, and flexibility, empowering you to unlock new opportunities and maximize your cloud investment.

 

Key Insights for a Successful Migration

1. Strategic Assessment: Map Capabilities and Opportunities

Begin your journey by evaluating your current AWS ALB environment. Identify critical features—path-based routing, health checks, SSL/TLS termination, autoscaling, and security integrations. Map these capabilities to Azure Application Gateway’s advanced features, including zone redundancy, integrated Web Application Firewall (WAF), and seamless certificate management with Azure Key Vault.

This assessment is your blueprint for a migration that preserves business continuity and unlocks new value.

 

2. Preparation: Build a Foundation for Success

Preparation is the cornerstone of a smooth migration. Document your existing configurations, export and convert SSL/TLS certificates, and update backend services to leverage Azure’s intelligent routing and monitoring. Reduce DNS TTL values to enable rapid cutover and minimize downtime.

Leverage Infrastructure as Code to deploy Azure resources with speed and consistency, ensuring your environment is ready for transformation.

 

3. Migration Execution: Seamless Transition, Minimal Disruption

Deploy Azure Application Gateway and backend resources in parallel with your AWS environment. Validate routing, security, and health probe configurations to ensure flawless operation. During DNS cutover, monitor propagation and service health to deliver a seamless experience for your users.

Azure’s integrated diagnostics and monitoring tools provide real-time visibility, empowering you to resolve issues proactively and maintain peak performance.

 

4. Validation and Optimization: Drive Continuous Improvement

Success is measured by outcomes—performance, reliability, and user satisfaction. Compare Azure metrics against your AWS baselines, validate routing accuracy, and test failover scenarios. Use Azure Monitor and Log Analytics to gain actionable insights and optimize your configuration.

Embrace an iterative approach to refine your environment, ensuring it evolves with your business needs.

 

Best Practices for Enterprise Migration

  • Leverage Azure’s integrated ecosystem: Use Key Vault for secure certificate management, Monitor for deep observability, and WAF for robust protection.
  • Automate and standardize: Adopt Infrastructure as Code for repeatable, error-free deployments.
  • Test and validate: Employ automated and manual testing to ensure every capability meets your requirements.
  • Minimize downtime: Plan cutover during low-traffic periods and prepare rollback strategies for business assurance.
  • Monitor and optimize: Continuously improve with Azure’s analytics and alerting tools.

 

The Azure Advantage: Empower Your Business

Migrating to Azure Application Gateway is a catalyst for digital transformation. With Microsoft’s commitment to security, reliability, and innovation, your organization is equipped to thrive in a dynamic marketplace.

Ready to unlock the full potential of your cloud strategy? Discover Azure Application Gateway best practices and join the leaders who are shaping the future of cloud networking.

 

Updated Sep 03, 2025
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