CKA Resource Monitoring

Question 1

What command shows CPU and memory usage of nodes in Kubernetes?

Accepted Answer

kubectl top nodes

Answer

kubectl top nodes displays real-time CPU and memory usage metrics for all nodes in the cluster, requiring metrics-server to be installed.

Question 2

What is the Metrics Server in Kubernetes?

Accepted Answer

A cluster-wide aggregator of resource usage data

Answer

Metrics Server collects CPU and memory usage data from kubelets on each node and makes it available through the Kubernetes API for HPA and kubectl top commands.

Question 3

What is a Horizontal Pod Autoscaler (HPA)?

Accepted Answer

A controller that automatically scales Pod replicas based on metrics

Answer

HPA automatically adjusts the number of Pod replicas in a Deployment based on observed CPU utilization or custom metrics, scaling up under load and down when idle.

Question 4

What command shows resource usage of Pods?

Accepted Answer

kubectl top pods

Answer

kubectl top pods displays CPU and memory consumption for each Pod, helping identify resource-hungry workloads.

Question 5

What are resource requests in Kubernetes?

Accepted Answer

The minimum amount of resources guaranteed to a container

Answer

Resource requests define the minimum amount of CPU and memory a container is guaranteed. The scheduler uses requests to decide which node can accommodate the Pod.

(CKA) Certified Kubernetes Associate Practice Test

(CKA) Certified Kubernetes Associate Practice Test

CKA Resource Monitoring