Using DNS Traffic Management to Add Resiliency to Shopify’s Services - Shopify

This post details Shopify's journey from various manual and semi-automated DNS traffic management approaches to a consolidated, fully automated, and self-served system. It outlines the requirements for reliability and redundancy, leading to the adoption of two DNS providers. The post defines a layered traffic management approach: Geographical Fencing, Endpoint Status (health checking), Endpoint Priority, and Weighted Selection. It also describes the deployment and maintenance process using a git repository and spy commands for configuration.