Question

Your team runs a stateless order-processing service on Compute Engine. Traffic is steady during business hours but spikes unpredictably during promotions. You want the number of identical VMs to grow and shrink automatically based on demand, while ensuring instances that fail health checks are automatically recreated. Which configuration should you use?

Accepted Answer

Create a managed instance group from an instance template with autoscaling enabled based on CPU utilization and enable autohealing with a health check.

Answer

Create an unmanaged instance group and manually add VMs, then attach a health check to recreate failed instances.

Answer

Deploy a single large VM with a custom machine type and resize it manually before each promotion.

Answer

Create multiple standalone VMs from a snapshot and place them behind a load balancer without an instance group.