Operator SDK basics in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to create a new operator project using Operator SDK.

Kubernetes

operator-sdk init --domain=[1]

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

Ainit

Boperator

Cexample.com

Dcreate

Attempts:

3 left

💡 Hint

Common Mistakes

Using command words like 'init' or 'create' instead of a domain name.

The operator-sdk init command requires a domain name to initialize the project. Here, example.com is a common placeholder domain.

2fill in blank

medium

Complete the command to create a new API with group 'app' and version 'v1'.

Kubernetes

operator-sdk create api --group=[1] --version=v1 --kind=AppService

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

Aapp

Bservice

Cv2

Dcore

Attempts:

3 left

💡 Hint

Common Mistakes

Using version or kind names instead of the group name.

The --group flag specifies the API group. Here, it should be app as given in the instruction.

3fill in blank

hard

Fix the error in the command to generate a controller for the kind 'AppService'.

Kubernetes

operator-sdk create controller --kind=[1]

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

AappService

BAppService

Cappservice

DAppservice

Attempts:

3 left

💡 Hint

Common Mistakes

Using all lowercase or incorrect capitalization for the kind name.

The kind name is case sensitive and should start with a capital letter for each word, so AppService is correct.

4fill in blank

hard

Fill both blanks to build and push the operator image with the correct image name and tag.

Kubernetes

make docker-build docker-push IMG=[1]:[2]

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

Aquay.io/myrepo/my-operator

Blatest

Cv0.1.0

Dmy-operator

Attempts:

3 left

💡 Hint

Common Mistakes

Using only the operator name without registry, or using 'latest' tag when a version is expected.

The IMG variable needs the full image path including registry and repo, and the tag should be a version like v0.1.0.

5fill in blank

hard

Fill all three blanks to run the operator locally with the correct image, namespace, and watch namespace.

Kubernetes

operator-sdk run local --image=[1] --namespace=[2] --watch-namespace=[3]

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

Aquay.io/myrepo/my-operator:v0.1.0

Bdefault

Coperators

Dmy-operator:v0.1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using incomplete image names or wrong namespaces.

The --image flag needs the full image path with tag, --namespace is usually 'default' for local testing, and --watch-namespace is the namespace the operator watches, here 'operators'.