Experimenting with TPUs, GKE Managed DRANET, and Multi-cluster Inference Gateway

This post demonstrates building a highly available AI inference setup using GKE Managed DRANET for TPU resource sharing, Multi-cluster GKE Inference Gateway for cross-region load balancing with automatic failover, and Cloud Storage FUSE for model storage. The setup deploys a Gemma 3 LLM across two GKE clusters in different regions using 4 TPU v6e chips each, with traffic routing to the closest region and automatic failover.