Quick Answer

Learn how to build high-availability load balancing for API gateways that survives regional outages, scales horizontally, and keeps latency low for microservices in the US and India.

In practice, the choice between a single global LB vs regional ones hinges on your latency budget and failure domain. If you can tolerate 50‑ms extra hops, a single Azure Front Door with health probes may be simpler; if you need <1 ms, a dual‑layer approach is warranted. When I’d choose a single edge LB, I’m willing to accept slower failover but lower operational overhead. When I’d choose regional LBs, I’m trading a slightly higher cost for instant regional failover.

Single Point of Failure in API Gateways

In a global microservice lands CAP e, the API gateway is the single source of truth for routing, authentication, and policy enforcement. When a gateway node goes down, the effect ripples: downstream services receive fewer requests, rate limits are bypassed, and clients see spikes in latency.…