“You have multiple backend instances. If one instance goes down, how will Apigee X automatically route traffic to another healthy instance?” This sounds like a simple interview question. But if you've worked with Apigee, you know there is more to it than just saying: “I'll configure multiple Target Servers.” The interviewer is really testing whether you understand load balancing, failover, health monitoring, retries, and high availability . In this article, we'll build the s...