Kubernetes - Production Best Practices
What will happen if you create a PDB with
maxUnavailable: 0 for a deployment with 5 pods?What will happen if you create a PDB with maxUnavailable: 0 for a deployment with 5 pods?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Interpret maxUnavailable: 0
maxUnavailable: 0 means zero pods can be disrupted voluntarily at once.Step 2: Understand effect on deployment
For 5 pods, this means no voluntary disruptions like node drains can evict pods until manual override.Final Answer:
No pods can be voluntarily disrupted at any time -> Option DQuick Check:
maxUnavailable 0 means no voluntary disruptions = D [OK]
Quick Trick: maxUnavailable 0 blocks all voluntary pod disruptions [OK]
Common Mistakes:
- Thinking maxUnavailable 0 allows some disruptions
- Assuming PDB is ignored if maxUnavailable is zero
- Confusing voluntary and involuntary disruptions
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