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CKA study material · question 131 of 1000

During a rolling update, why can the total Pod count briefly exceed the Deployment's replicas?

  1. Because readiness probes delay deletion
  2. Because maxSurge allows Pods above the desired count
  3. Because the old ReplicaSet is not scaled down
  4. Because the scheduler double-books nodes
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Answer: B. Because maxSurge allows Pods above the desired count

The running count sits between replicas minus maxUnavailable and replicas plus maxSurge during a rollout.

Source: Deployments (Kubernetes) — Rollover (aka multiple updates in-flight)

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