What

The deployment for ExternalDNS operator needs to detect which zone (public or private) to deploy to, this applies only for Azure Cloud. This is due to the fact that Azure have split the functionality in their SDK for private and public zones

How

The selection for private zone provider can be made on the zone string provided in the CR as an example

/subscriptions/xxxx/resourceGroups/test-az-2f9kj-rg/providers/Microsoft.Network/privateDnsZones/test-az.example.com

Acceptance Criteria

• Add unit tests for Azure to check 
  • private zone
  • public zone
• Add unit tests to check for OpenShift specific deployment (read global dns config to determine zones)
• Implement all relevant unit tests
• Well Documented README