StatefulSet ordering and naming in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the number of replicas in a StatefulSet.

Kubernetes

replicas: [1]

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A5

B1

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting replicas to 0 will create no pods.

Using a string instead of a number.

The replicas field sets how many pods the StatefulSet will create. Here, 5 replicas means 5 pods.

2fill in blank

medium

Complete the code to set the service name used by the StatefulSet.

Kubernetes

serviceName: [1]

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Adefault

Bmy-service

Cstateful-service

Dbackend

Attempts:

3 left

💡 Hint

Common Mistakes

Using a service name that does not exist.

Using the default service name incorrectly.

The serviceName field defines the headless service that governs the network identity of the pods.

3fill in blank

hard

Fix the error in the pod naming pattern for StatefulSet pods.

Kubernetes

pod name example: [1]-0

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Astatefulset

Bpod

Cdeployment

Dservice

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pod' or 'deployment' as the prefix causes naming errors.

Pods in a StatefulSet are named with the StatefulSet name plus a dash and an ordinal number starting at 0.

4fill in blank

hard

Fill both blanks to complete the StatefulSet pod ordinal naming and startup order.

Kubernetes

Pods start in order from [1] to [2]

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A0

B1

Cn-1

Dn

Attempts:

3 left

💡 Hint

Common Mistakes

Starting from 1 instead of 0.

Using n instead of n-1 for the last pod ordinal.

StatefulSet pods start in ordinal order from 0 up to n-1, where n is the number of replicas.

5fill in blank

hard

Fill all three blanks to complete the pod identity and volume claim template naming in a StatefulSet.

Kubernetes

pod name: [1]-[2]
volume claim template name: [3]-[2]

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Aweb

Bstatefulset

Cdata

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing pod name and volume claim template names.

Using wrong ordinals.

The pod name uses the StatefulSet name plus ordinal (e.g., statefulset-0). The volume claim template uses a name like 'data' plus the ordinal (e.g., data-0).