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Azure & High Availability

Multi-Zone Enterprise Deployment

Designed a Disaster Recovery-ready architecture on Microsoft Azure spanning multiple Availability Zones with Traffic Manager, geo-replicated SQL and automatic failover.

Industry: Enterprise Azure Platform
Duration: 6 Weeks
Role: Enterprise Cloud Architect
Status: Live in Production
99.99%
Uptime SLA
Multi-AZ
Availability Zones
Auto
Failover on Datacenter Failure
Geo
Replicated SQL Database
The Challenge

Where It Started

Designed a Disaster Recovery-ready architecture on Microsoft Azure spanning multiple Availability Zones with Traffic Manager, geo-replicated SQL and automatic failover.

Problems
  • Single-region deployment — one outage takes down the whole platform
  • No automatic failover during regional incidents
  • Database had no geo-redundancy
  • No global traffic routing to nearest healthy region
Our Solution
  • Azure Traffic Manager for global DNS-based routing
  • Multi-zone AKS node pools across availability zones
  • Azure SQL active geo-replication with automatic failover
  • Layer-4 load balancing within each zone
Architecture

System Overview

Client Azure Traffic Manager Availability Zone 1 Azure Load Balancer AKS Node Pool A Availability Zone 2 AKS Pool B Azure SQL Primary Geo-Replicated SQL Replica 99.99% Uptime SLA Auto Failover Multi-zone Azure deployment — business continues even if a full datacenter fails
Implementation

How We Delivered It

Week 1–2
Multi-Zone Architecture Design
Designed the target multi-zone AKS topology and Azure SQL geo-replication strategy for business continuity.
Week 3–4
AKS & Traffic Manager Rollout
Deployed AKS node pools across multiple availability zones and configured Azure Traffic Manager for global routing.
Week 5
Geo-Replication & Failover Testing
Configured Azure SQL geo-replication and ran simulated zone-failure drills to validate automatic failover.
Week 6
Handover & Documentation
Finalized monitoring, documented failover runbooks and handed the fully tested HA system over to the client team.
Tech Stack

Technologies Used

Azure AKSAzure Traffic ManagerAzure SQLAzure Load BalancerAzure DevOpsGeo-Replication
Results

The Impact We Delivered

99.99%
Uptime SLA
Multi-zone architecture delivers enterprise-grade availability guarantees.
Multi-AZ
Zone Redundancy
Workloads run across multiple availability zones simultaneously.
Auto
Failover on Outage
Traffic automatically reroutes to a healthy zone within seconds.
Geo
Replicated Database
Azure SQL geo-replication ensures data survives a full region failure.
"We used to hold our breath during every Azure incident. Now the platform just keeps running — customers never even notice a zone went down."
— CIO, Enterprise Azure Platform (Client, Confidential)

Project Details

IndustryEnterprise Azure Platform
Duration6 Weeks
Team Size3 Engineers
RoleEnterprise Cloud Architect
StatusLive in Production

Services Used

Azure AKSTraffic ManagerAzure SQLGeo-ReplicationDevOpsHA
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Key Wins

  • 99.99% uptime SLA achieved
  • Multi-zone AKS redundancy
  • Automatic geo-replicated database failover
  • Global Traffic Manager routing
  • Full business continuity runbooks

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