Back to all work Case Study · Production Verified

Multi-Region AKS with Automated DR Drills

Active-passive geographic resilience across East US and West Europe using Azure Front Door, geo-replicated Azure Container Registries, and automated game day failover drills.

Client Industry Global Logistics
Duration 9 Weeks
Role Resilience Architect
Primary Stack Azure AKS · Front Door · GitOps
22 min
RTO (cut down from 4 hours)
< 1 min
RPO database recovery point
100%
Game day failover success
4x
Quarterly automated drill cadence
Network switching hardware routing traffic between cloud regions
Global Traffic Shift & Failover Architecture
Azure Front Door Global Anycast Health Probing
→
Primary AKS (East US) Live Production Workload
⇄
Secondary AKS (West EU) Warm Standby Auto-Sync
→
Cosmos DB / SQL Geo Multi-Region Read/Write

The Challenge

A single regional cloud outage in 2025 took down the client's global container fleet for over 4 hours, freezing maritime shipment tracking and costing millions in contractual delay penalties.

The Architectural Solution

Step 1

Declarative Dual-Cluster Parity

Managed both primary and secondary clusters identically via Flux GitOps, guaranteeing that application manifests, configmaps, and secrets were synchronized continuously.

Step 2

Automated Traffic Shifting

Configured Azure Front Door with automated latency routing and sub-minute health probes, shifting 100% of global ingress automatically whenever primary cluster responsiveness drops.

Step 3

Quarterly Game Days

Instituted automated chaos drills using Azure Chaos Studio to inject simulated network failures and test automated recovery runbooks without human panic.

“Ryan's multi-region architecture turned our board's single biggest risk concern into our strongest competitive differentiator.”

Elena Rostova — VP Infrastructure, Horizon Freight