Google Cloud Professional Cloud Network Engineer — Question 44

You are designing a Google Kubernetes Engine (GKE) cluster for your organization. The current cluster size is expected to host 10 nodes, with 20 Pods per node and 150 services. Because of the migration of new services over the next 2 years, there is a planned growth for 100 nodes, 200 Pods per node, and 1500 services. You want to use VPC-native clusters with alias IP ranges, while minimizing address consumption.
How should you design this topology?

Answer options

• A. Create a subnet of size/25 with 2 secondary ranges of: /17 for Pods and /21 for Services. Create a VPC-native cluster and specify those ranges.
• B. Create a subnet of size/28 with 2 secondary ranges of: /24 for Pods and /24 for Services. Create a VPC-native cluster and specify those ranges. When the services are ready to be deployed, resize the subnets.
• C. Use gcloud container clusters create [CLUSTER NAME]--enable-ip-alias to create a VPC-native cluster.
• D. Use gcloud container clusters create [CLUSTER NAME] to create a VPC-native cluster.

Correct answer: A

Explanation

Option A is correct as it provides an adequately sized subnet and secondary ranges to accommodate the expected growth in nodes, Pods, and services. Options B and D do not offer sufficient address space for the future requirements, while Option C lacks the specificity of secondary ranges which are crucial for optimal address management.