Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 677 discussion

I think the question is easy to misunderstand, whether you should create the whole setup or just the development cluster. But from the wording ("The [production] EKS cluster has (!) managed node groups ... The company needs a dedicated EKS cluster for development work"), I conclude that we should only create the development cluster. As this will be used "infrequently" for testing purposes only, and it must be "most cost-effective", I'd go with A - new cluster with "one managed node group that contains only Spot instances".

This question is convoluted and missing some details. We need: - control plane running on on-demand EC2s - worker nodes running on spot instances Read this to understand correct solution: https://aws.amazon.com/blogs/containers/amazon-eks-now-supports-provisioning-and-managing-ec2-spot-instances-in-managed-node-groups/

If we look closer to the last requirement "The EKS cluster must manage all the nodes." Option B is the only feasable and cost-effective one.

Based on the document [1], we can know that only self-managed node group can deploy the container on EC2 dedicated hosts . Which mean that customer need to manually create launch template, auto scaling group, and register it to the EKS cluster. The creation process should be same as general EC2 auto scaling creation. For now, EKS managed node group only supported on-demand and spot. MOST cost-effectively: *Spot Instances* https://repost.aws/questions/QUugoX4f1gRHW0MGHRTHFFFA/how-to-create-eks-cluster-with-dedicated-host-node-group

"The company will use the development cluster infrequently to test the resiliency of the application" = Spot instances = cost effective

The keywords are infrequent and resiliency.. This solution allows you to have a mix of On-Demand Instances and Spot Instances within the same EKS cluster. You can use the On-Demand Instances for the development work where you need dedicated resources and then leverage Spot Instances for testing the resiliency of the application. Spot Instances are generally more cost-effective but can be terminated with short notice, so using a combination of On-Demand and Spot Instances provides a balance between cost savings and stability. Option A (Create a managed node group that contains only Spot Instances) might be cost-effective, but it could introduce potential challenges for tasks that require dedicated resources and might not be the best fit for all scenarios.

The GBT vote A, I know the spot instance is the cheapest, but the question says "dedicated EKS cluster for development", so I vote B

Option A leverages the cost savings of Spot Instances, which is ideal for a development environment where the application is tested infrequently, and there is flexibility in when the nodes can be interrupted. This aligns with the goal of cost-efficiency and takes advantage of EKS's ability to manage the nodes directly.

B is the best ans.

Option B