Improving the Resiliency of Our Infrastructure DNS Zone

This post details the implementation of a multi-primary DNS zone strategy for Cloudflare's infrastructure zone. This involves adding a third-party DNS provider as a second primary authority, managed using OctoDNS for synchronized record updates. The setup leverages DNSDist for weighted, health-checked routing of internal DNS queries, prioritizing Cloudflare's edge DNS and failing over to the third-party provider during outages. The post also describes the automation of DNS record provisioning using OctoDNS integrated with TeamCity for CI/CD, including a review step for changes.