Kubernetes - Scheduling
Which of the following is the correct YAML snippet to define a DaemonSet selector matching label
app: node-agent?Which of the following is the correct YAML snippet to define a DaemonSet selector matching label app: node-agent?
easy📝 Configuration Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand selector syntax
DaemonSet selector usesmatchLabelsormatchExpressionsunderselector.Step 2: Identify correct syntax for label match
selector: matchLabels: app: node-agentcorrectly usesmatchLabelswithapp: node-agent.selector: labels: app: node-agentuses invalid keylabels.selector: matchExpressions: - key: app operator: ExistsusesmatchExpressionswithoperator: Exists, matching presence ofappkey regardless of value.selector: matchLabels: app: node-agent matchExpressions: - key: role operator: Existsmixes both but requiresrolelabel existence.Final Answer:
selector: matchLabels: app: node-agent -> Option BQuick Check:
Correct selector syntax = matchLabels [OK]
Quick Trick: Use matchLabels for simple label selectors in DaemonSet [OK]
Common Mistakes:
- Using 'labels' instead of 'matchLabels' under selector
- Incorrect indentation or YAML formatting
- Mixing matchLabels and matchExpressions incorrectly
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