Design the Game Backend Platform for a REST API using Google best practices: which instance group and load balancer setup do you use?
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Correct answer: Create an instance template for the backend. For every region, deploy it on a multi-zone managed instance group. Use an L7 load balancer..
Why this is the answer
The correct choice leverages multi-zone Managed Instance Groups (MIGs) for high availability and resilience within each region. If one zone experiences an outage, the application remains available in other zones. An L7 (HTTP(S)) load balancer is appropriate for a REST API because it can inspect HTTP headers, perform URL-based routing, and offer advanced features like SSL termination and content-based load balancing, which are beneficial for API management. Incorrect options: Using single-zone MIGs (options 2 and 4) creates a single point of failure within a region, reducing fault tolerance. An L4 (TCP/UDP) load balancer (options 1 and 2) operates at the transport layer and lacks the application-level intelligence needed for advanced REST API routing and management features.
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