A global e-commerce platform relies on Azure Kubernetes Service (AKS) clusters deployed in multiple Azure regions for its customer-facing applications. The company needs to ensure that user requests are always routed to the closest healthy AKS cluster to minimize latency. In the event of a regional outage or cluster failure, traffic must automatically failover to the next available healthy cluster. Which Azure service should be used to manage global traffic distribution and failover for the AKS clusters?
- AAzure Traffic Manager
- BAzure Load Balancer
- CAzure Front Door
- DAzure Application Gateway
Show answer & explanationAnswer & explanation
Correct answer: C. Azure Front Door
Azure Front Door is a global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications. It provides dynamic site acceleration, global HTTP(S) load balancing, WAF capabilities, and automatic failover across regional endpoints (like AKS clusters) based on health probes, ensuring traffic is routed to the closest healthy cluster for optimal latency and high availability.
Why the other options are wrong
- A. Azure Traffic Manager provides global DNS-based traffic distribution and failover but operates at the DNS layer (Layer 7 for HTTP/HTTPS, but not proxy-based) and does not offer dynamic site acceleration, WAF, or certificate offloading capabilities that Front Door provides.
- B. Azure Load Balancer operates at Layer 4 and is regional, not global, so it cannot distribute traffic across multiple regions or provide global failover.
- D. Azure Application Gateway operates at Layer 7 but is regional, not global, and cannot route traffic across multiple Azure regions.
Azure Front Door for Multi-Region AKS
Azure Front Door acts as a global entry point for multi-region AKS deployments, providing intelligent traffic routing, application acceleration, and automatic failover to ensure high availability and low latency.
- Global HTTP(S) load balancing at Layer 7.
- Routes traffic to the closest healthy backend (AKS cluster).
- Provides WAF, DDoS protection, and dynamic site acceleration.
- Supports automatic failover between regional AKS clusters.
Memory trick: Front Door is the global concierge for your AKS apps, always directing users to the best experience.