Taints and tolerations in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a taint to a node that prevents pods without tolerations from scheduling.

Kubernetes

kubectl taint nodes node1 key=[1]:NoSchedule

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

Avalue1

Btrue

Cvalue

DNoExecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'true' as the value instead of a string.

Using the effect as the value.

Leaving the value empty.

The taint key-value pair is specified as key=value. Here, value is the correct value for the taint.

2fill in blank

medium

Complete the pod spec to tolerate a taint with key 'key' and effect 'NoSchedule'.

Kubernetes

tolerations:
- key: "key"
  operator: "Equal"
  value: "[1]"
  effect: "NoSchedule"

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

Avalue

Bvalue1

Ctrue

DNoExecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'true' as the value instead of the taint's value.

Using the effect as the value.

Leaving the value empty.

The toleration value must match the taint value. Here, the taint value is 'value', so the toleration value is also 'value'.

3fill in blank

hard

Fix the error in the toleration that causes the pod to not tolerate the taint.

Kubernetes

tolerations:
- key: "key"
  operator: "[1]"
  value: "value"
  effect: "NoSchedule"

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

AExists

BEqual

CNotExists

DIn

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Exists' which ignores the value.

Using invalid operators like 'NotExists' or 'In'.

The operator must be 'Equal' to match the taint's key and value exactly. 'Exists' ignores the value, which may cause mismatch.

4fill in blank

hard

Fill both blanks to create a toleration that tolerates any taint with key 'key' and effect 'NoExecute'.

Kubernetes

tolerations:
- key: "key"
  operator: "[1]"
  effect: "[2]"

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

AExists

BEqual

CNoSchedule

DNoExecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Equal' operator without specifying value.

Using wrong effect like 'NoSchedule'.

Using operator 'Exists' means the toleration ignores the value and tolerates any taint with the key. The effect must be 'NoExecute' to match the taint effect.

5fill in blank

hard

Fill all three blanks to create a pod toleration that matches a taint with key 'key', value 'value', and effect 'NoSchedule'.

Kubernetes

tolerations:
- key: "[1]"
  operator: "[2]"
  value: "[3]"
  effect: "NoSchedule"

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

Akey

BEqual

Cvalue

DExists

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Exists' operator with a value specified.

Mismatching key or value strings.

Omitting the value field.

The toleration must specify the exact key, use operator 'Equal' to match the value, and specify the taint's value to tolerate it properly.