Headless services concept in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a headless service by setting the correct clusterIP value.

Kubernetes

apiVersion: v1
kind: Service
metadata:
  name: my-headless-service
spec:
  clusterIP: [1]
  selector:
    app: myapp
  ports:
  - protocol: TCP
    port: 80
    targetPort: 9376

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

ALoadBalancer

B10.0.0.1

CNone

DClusterIP

Attempts:

3 left

💡 Hint

Common Mistakes

Using a normal IP address instead of 'None'.

Setting clusterIP to 'ClusterIP' or 'LoadBalancer' which are not valid values here.

Setting clusterIP: None creates a headless service in Kubernetes.

2fill in blank

medium

Complete the command to create a headless service from a YAML file named service.yaml.

Kubernetes

kubectl [1] -f service.yaml

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Adelete

Bapply

Cget

Ddescribe

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'get' which only retrieves information.

Using 'delete' which removes resources.

Using 'describe' which shows details but does not create.

The kubectl apply command creates or updates resources from a YAML file.

3fill in blank

hard

Fix the error in the service selector to correctly match pods with label 'app: myapp'.

Kubernetes

spec:
  selector:
    app: [1]

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Amyapp

Bapp

Cmy-app

Dmyapp1

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different label value like 'my-app' or 'myapp1'.

Using the label key instead of the value.

The selector must exactly match the pod label value 'myapp' to select the pods correctly.

4fill in blank

hard

Fill both blanks to create a headless service that selects pods labeled 'app: web' and exposes port 8080.

Kubernetes

spec:
  clusterIP: [1]
  selector:
    app: [2]
  ports:
  - port: 8080

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ANone

Bweb

Cmyapp

DLoadBalancer

Attempts:

3 left

💡 Hint

Common Mistakes

Using a normal IP or LoadBalancer for clusterIP.

Using wrong label values in selector.

Setting clusterIP: None makes the service headless, and the selector must match the pod label 'web'.

5fill in blank

hard

Fill all three blanks to define a headless service with name 'db-service', selecting pods labeled 'role: database' and exposing port 5432.

Kubernetes

apiVersion: v1
kind: Service
metadata:
  name: [1]
spec:
  clusterIP: [2]
  selector:
    role: [3]
  ports:
  - port: 5432

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Adb-service

BNone

Cdatabase

Dfrontend

Attempts:

3 left

💡 Hint

Common Mistakes

Using a normal IP or LoadBalancer for clusterIP.

Using wrong service name or label values.

The service name is 'db-service', clusterIP is 'None' for headless, and selector matches pods with label 'role: database'.