You added the label app.kubernetes.io/managed-by: helm to a deployment, but kubectl get deployment -l app.kubernetes.io/managed-by=helm returns no results. What is the likely cause?

medium📝 Troubleshoot Q6 of 15

Kubernetes - Labels and Selectors

You added the label app.kubernetes.io/managed-by: helm to a deployment, but kubectl get deployment -l app.kubernetes.io/managed-by=helm returns no results. What is the likely cause?

AThe label value should be uppercase 'Helm'

BThe label key is misspelled in the selector

CThe label was added under annotations instead of labels

DThe deployment is not running

Step-by-Step Solution

Solution:

Step 1: Check where the label was added
If the label was mistakenly added under annotations, it won't be found by label selectors.
Step 2: Verify label selector and deployment status
Misspelling or deployment status would cause different symptoms; label value case is case-sensitive but usually lowercase is correct.
Final Answer:
The label was added under annotations instead of labels -> Option C
Quick Check:
Labels must be under metadata.labels to be selectable [OK]

Quick Trick: Labels must be under metadata.labels, not annotations [OK]

Common Mistakes:

Adding labels under annotations
Misspelling label keys
Ignoring case sensitivity

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You added the label app.kubernetes.io/managed-by: helm to a deployment, but kubectl get deployment -l app.kubernetes.io/managed-by=helm returns no results. What is the likely cause?

Step 1: Check where the label was added

Step 2: Verify label selector and deployment status

Final Answer:

Quick Check:

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