Running a large-scale application serving customers across multiple regions can be challenging. You can use different methods to control the Kubernetes scheduler, but if you long for high availability and efficiency across different failure domains, it’s time to explore topology spread constraints.
Optimizing performance and availability can be tricky even when your systems don’t comprise numerous data centers across different countries or continents. Node Selector, Node Affinity, Pod Affinity, and Anti-affinity can help you tame the Kubernetes scheduler, but they may be insufficient for setups with multiple failure domains like regions, zones, and nodes.