Answer-first summary for fast verification
Answer: Verify the maximum node pool size, enable a horizontal pod autoscaler, and then perform a load test to verify your expected resource needs.
The correct approach involves ensuring that the service can handle the predicted growth and maintain resilience against zone failure without incurring unnecessary costs. Option A is correct because it suggests verifying the maximum node pool size, enabling a horizontal pod autoscaler, and performing a load test. This approach ensures that the cluster can scale both pods and nodes as needed, based on actual load, which is efficient and cost-effective. Option B is incorrect because while the cluster autoscaler does help in scaling nodes, it's not sufficient on its own to ensure that the pods are optimally distributed and scaled based on demand. Option C is incorrect because 30% utilization does not account for the expected growth or the need for resilience against zone failure. Option D is incorrect because proactively adding a fixed 60% more capacity does not account for the dynamic nature of cloud resources and could lead to unnecessary costs. Therefore, the correct answer is A.
Author: LeetQuiz Editorial Team
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How should you prepare your GKE Standard regional cluster (spanning three zones with autoscaling enabled) to accommodate a projected 10% month-over-month user growth for six months, while maintaining 30% current CPU utilization, ensuring resilience against zone failures, minimizing user impact, and optimizing cost efficiency?
A
Verify the maximum node pool size, enable a horizontal pod autoscaler, and then perform a load test to verify your expected resource needs.
B
Because you are deployed on GKE and are using a cluster autoscaler, your GKE cluster will scale automatically, regardless of growth rate.
C
Because you are at only 30% utilization, you have significant headroom and you won't need to add any additional capacity for this rate of growth.
D
Proactively add 60% more node capacity to account for six months of 10% growth rate, and then perform a load test to make sure you have enough capacity.
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