ExpertMedium1 markMultiple Choice
GCP PCA · Question 26 · Compute Systems
You are designing a highly available web application on Compute Engine. The application must survive a zone failure without manual intervention. How should you configure the Compute Engine instances?
You are designing a highly available web application on Compute Engine. The application must survive a zone failure without manual intervention. How should you configure the Compute Engine instances?
Answer options:
A.
Deploy the instances in a Zonal Managed Instance Group and configure a Cloud Monitoring alert to manually recreate them in another zone if the primary zone fails.
B.
Deploy the instances in a Regional Managed Instance Group (MIG) across multiple zones.
C.
Deploy the instances in an Unmanaged Instance Group and attach it to a Global Load Balancer.
D.
Use a single Compute Engine instance with a Regional Persistent Disk.
How to approach this question
Identify the Compute Engine feature that provides multi-zone high availability automatically.
Full Answer
B.Deploy the instances in a Regional Managed Instance Group (MIG) across multiple zones.✓ Correct
Deploy the instances in a Regional Managed Instance Group (MIG) across multiple zones.
Regional Managed Instance Groups (MIGs) distribute VM instances across multiple zones in a region. They provide high availability by automatically detecting instance failures (autohealing) and zone failures, recreating instances in healthy zones without manual intervention.
Common mistakes
Confusing Zonal MIGs (which only protect against VM failure, not zone failure) with Regional MIGs.
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