ExpertMedium1 markMultiple Choice
Domain 3.1: Deploying and implementing Compute Engine resourcesCompute EngineManaged Instance GroupsAutoscalingInstance Templates
GCP ACE · Question 19 · Domain 3.1: Deploying and implementing Compute Engine resources
You need to deploy a fleet of identical web servers on Compute Engine that will automatically scale up when CPU utilization exceeds 70%.
What is the correct sequence of resources you must create to achieve this?
You need to deploy a fleet of identical web servers on Compute Engine that will automatically scale up when CPU utilization exceeds 70%.
What is the correct sequence of resources you must create to achieve this?
Answer options:
A.
Create a Managed Instance Group (MIG) -> Create an Instance Template -> Configure Autoscaling.
B.
Create a Custom Image -> Create an Instance Template -> Create a Managed Instance Group (MIG) with autoscaling.
C.
Create an Unmanaged Instance Group -> Add VMs manually -> Enable Autoscaling.
D.
Create an Instance Template -> Create a Target Pool -> Enable Autoscaling.
How to approach this question
Understand the dependency chain for autoscaling in Compute Engine.
Full Answer
B.Create a Custom Image -> Create an Instance Template -> Create a Managed Instance Group (MIG) with autoscaling.✓ Correct
Create a Custom Image -> Create an Instance Template -> Create a Managed Instance Group (MIG) with autoscaling.
To use autoscaling, you must use a Managed Instance Group (MIG). A MIG requires an Instance Template to know what kind of VMs to create. The Instance Template typically references a Custom Image that contains your application code. Therefore, the order is Image -> Template -> MIG (with autoscaling).
Common mistakes
Confusing Managed and Unmanaged Instance Groups. Only Managed Instance Groups support autoscaling and auto-healing.
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