Kubernetes - ReplicaSets and Deployments
Which of the following is the correct minimal YAML snippet to define a Deployment selector matching pods with label
app: myapp?Which of the following is the correct minimal YAML snippet to define a Deployment selector matching pods with label app: myapp?
easy📝 Configuration Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Deployment selector syntax
The selector must usematchLabelswith key-value pairs matching pod labels.Step 2: Check options
selector: matchLabels: app: myapp uses correctmatchLabelswithapp: myapp. selector: labels: app: myapp uses wrong keylabels. selector: matchLabels: name: myapp uses wrong label keyname. selector: matchExpressions: - key: app operator: In values: [myapp] usesmatchExpressionswhich is valid but more complex and not minimal.Final Answer:
selector: matchLabels: app: myapp -> Option AQuick Check:
Use matchLabels with correct key = A [OK]
Quick Trick: Use matchLabels with exact pod label keys [OK]
Common Mistakes:
- Using 'labels' instead of 'matchLabels'
- Mismatching label keys in selector
- Confusing matchLabels with matchExpressions
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