Kubernetes - Scheduling
Which of the following is the correct way to specify a DaemonSet selector in the YAML manifest?
Which of the following is the correct way to specify a DaemonSet selector in the YAML manifest?
easy📝 Configuration Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall DaemonSet selector syntax
The selector must usematchLabelsormatchExpressionsunderselector.Step 2: Identify correct syntax
selector: matchLabels: app: my-daemon usesmatchLabelscorrectly with key-value pairs. selector: labels: app: my-daemon is invalid because it useslabelsinstead ofmatchLabels. selector: matchExpressions: - key: app operator: Equals values: [my-daemon] has wrong operator case and structure. selector: matchLabels: app: my-daemon matchExpressions: - key: tier operator: In values: [backend] mixes both but DaemonSet selector only supports one selector type.Final Answer:
selector: matchLabels: app: my-daemon -> Option BQuick Check:
DaemonSet selector uses matchLabels [OK]
Quick Trick: Use matchLabels under selector for DaemonSet [OK]
Common Mistakes:
- Using 'labels' instead of 'matchLabels'
- Incorrect operator casing in matchExpressions
- Mixing matchLabels and matchExpressions in selector
Master "Scheduling" in Kubernetes
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