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

What this post added

This post details the evolution of Shopify's DNS traffic management from fragmented, manual approaches to a consolidated, automated, and self-served system. It introduces a layered traffic management model comprising Geographical Fencing, Endpoint Status, Endpoint Priority, and Weighted Selection. The system leverages two DNS providers for redundancy and utilizes a git repository for configuration management, with spy commands for efficient updates and failovers. This post focuses on the design and implementation of this unified system to enhance service resiliency.