Deployment as higher-level abstraction in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the kind of Kubernetes object for a Deployment.

Kubernetes

apiVersion: apps/v1
kind: [1]
metadata:
  name: nginx-deployment

Drag options to blanks, or click blank then click option'

ADeployment

BConfigMap

CPod

DService

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Pod' instead of 'Deployment' causes only one pod to be created.

Using 'Service' does not manage pod replicas.

The kind field specifies the type of Kubernetes object. For managing replicas and updates, Deployment is used.

2fill in blank

medium

Complete the code to set the number of pod replicas in a Deployment.

Kubernetes

spec:
  replicas: [1]

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A"three"

B3

Creplicas

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the number in quotes makes it a string, which is invalid.

Using a boolean like 'true' is incorrect here.

The replicas field expects a number, not a string or boolean. Here, 3 means three pod copies.

3fill in blank

hard

Fix the error in the selector field to correctly match pod labels.

Kubernetes

spec:
  selector:
    matchLabels:
      app: [1]

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Anginx

Bapp

CmatchLabels

Dspec

Attempts:

3 left

💡 Hint

Common Mistakes

Using the label key instead of the value causes no pods to be selected.

Using unrelated words breaks the selector.

The selector must match the label value of pods. Here, pods have label app: nginx, so the value should be nginx.

4fill in blank

hard

Fill both blanks to complete the pod template labels and container image.

Kubernetes

spec:
  template:
    metadata:
      labels:
        app: [1]
    spec:
      containers:
      - name: nginx
        image: [2]

Drag options to blanks, or click blank then click option'

Anginx

Bnginx:latest

Cnginx:1.21

Dapp

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching labels and selectors causes pods not to be managed.

Using 'nginx:latest' can cause unpredictable updates.

The pod labels must match the selector value, so app: nginx. The container image should specify a valid image tag like nginx:1.21.

5fill in blank

hard

Fill all three blanks to complete the Deployment spec with replicas, selector, and container image.

Kubernetes

apiVersion: apps/v1
kind: Deployment
metadata:
  name: webapp
spec:
  replicas: [1]
  selector:
    matchLabels:
      app: [2]
  template:
    metadata:
      labels:
        app: [2]
    spec:
      containers:
      - name: webapp
        image: [3]

Drag options to blanks, or click blank then click option'

A2

Bwebapp

Cwebapp:v2

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using different labels in selector and template breaks pod matching.

Not specifying replicas as a number causes errors.

Using image without a tag can lead to unexpected versions.

The Deployment runs 3 replicas (3), with pods labeled app: webapp. The container image is webapp:v2 for version control.