In my experience managing large-scale Kubernetes deployments across multi-cloud platforms, traffic control often becomes a critical bottleneck, especially when dealing with mixed workloads like APIs, UIs, and transactional systems. While Istio’s default ingress gateway does a decent job, I found that relying on a single gateway can introduce scaling and isolation challenges.

That’s where configuring multiple Istio Ingress Gateways can make a real difference. In this article, I’ll walk you through how I approached this setup, what benefits it unlocked for our team, and the hands-on steps we used, along with best practices and YAML configurations that you can adapt in your own clusters.