DNS Architecture

This section of the documentation describes the DNS Architecture.

Public Access URLs
URL Type Example Purpose
Cluster-specific <prefix>.<region>.cloudapp.azure.com Direct access to a specific cluster
Global DR <hostname>.<zone> Failover-aware access via Traffic Manager
DNS Resolution Chain

Cluster-specific URL (direct access)

text
<prefix>.<region>.cloudapp.azure.com
         β”‚
         β”‚  Azure DNS (cloudapp.azure.com zone)
         β–Ό
   <public-ip> (Public IP of cluster LB)

Global DR URL (failover-aware access):

text
<hostname>.<zone>
         β”‚
         β”‚  External DNS CNAME (Route 53, etc.)
         β–Ό
<hostname>.trafficmanager.net
         β”‚
         β”‚  Azure Traffic Manager (Priority routing)
         β–Ό
   <primary-ip> ──or──▢ <secondary-ip> (if primary unhealthy)
Traffic Flow: Normal vs Failover

Normal operation:

Azure DR - Traffic Flow

During failover:

Azure DR - Flow During Failover

DR failover sequence:

Azure DR - Flow During Failover