Cost optimization in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a resource limit for CPU in a pod specification.

Kubernetes

resources:
  limits:
    cpu: [1]

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A500m

B2CPU

C1000Mi

D2GB

Attempts:

3 left

💡 Hint

Common Mistakes

Using memory units like '2GB' for CPU limits

Using '2CPU' which is not a valid unit

The CPU limit in Kubernetes is specified in millicores, so 500m means half a CPU core.

2fill in blank

medium

Complete the command to view the current resource usage of pods in a namespace.

Kubernetes

kubectl top pods -n [1]

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Asystem

Bdefault

Call

Dkube-system

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'all' which is not a valid namespace

Using 'kube-system' which is for system pods

The default namespace is the common namespace where pods run if none is specified.

3fill in blank

hard

Fix the error in the YAML snippet to request 1 CPU core for a container.

Kubernetes

resources:
  requests:
    cpu: [1]

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A1Mi

B1GB

C1000m

Done

Attempts:

3 left

💡 Hint

Common Mistakes

Using memory units like '1GB' or '1Mi'

Using words like 'one' instead of numeric units

CPU requests use millicores, so 1000m means 1 full CPU core.

4fill in blank

hard

Fill both blanks to create a Horizontal Pod Autoscaler that scales between 2 and 5 replicas based on CPU usage.

Kubernetes

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: example-hpa
spec:
  minReplicas: [1]
  maxReplicas: [2]
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 50

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A2

B10

C5

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting maxReplicas lower than minReplicas

Using very high maxReplicas causing cost spikes

The minimum replicas is 2 and maximum replicas is 5 to control scaling limits.

5fill in blank

hard

Fill all three blanks to create a resource quota limiting pods and CPU usage in a namespace.

Kubernetes

apiVersion: v1
kind: ResourceQuota
metadata:
  name: cpu-pod-quota
spec:
  hard:
    pods: [1]
    requests.cpu: [2]
    limits.cpu: [3]

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A10

B4

C8

D1000m

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing CPU units with pod counts

Using invalid CPU units like '4' without units

This quota limits pods to 10, CPU requests to 1000m (1 CPU), and CPU limits to 8 cores.