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Apurv Gujjar
Apurv GujjarDevOps & Cloud Engineer
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Interview DocumentationKubernetesWhat is the operational difference between a Deployment and a StatefulSet? When would you use one over the other?
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Q31

What is the operational difference between a Deployment and a StatefulSet? When would you use one over the other?

💬Answer
  • Deployment:
    • Designed for stateless workloads (e.g., frontend apps, API servers).
    • Pods are interchangeable, have random suffixes (e.g., web-7f8d9b), and share no unique identity or storage volumes.
  • StatefulSet:
    • Designed for stateful workloads (e.g., databases, Kafka clusters).
    • Pods have fixed, unique ordinal indexes (e.g., db-0, db-1, db-2).
    • Utilizes a Headless Service to generate stable DNS entries for each pod, and uses volumeClaimTemplates to attach a unique Persistent Volume (PV) to each pod index.

Related Kubernetes Questions

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Q1

️ 1. Cluster Internals

Q2

Can you explain how the Kubernetes Scheduler works under the hood? How does it choose the best node for a pod?

Q3

What is etcd, why is it critical to a Kubernetes cluster, and how does it maintain consistency?

Q4

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Apurv Gujjar - DevOps & Cloud Engineer
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Apurv Gujjar

DevOps & Cloud Engineer

Specialized in:DevOpsAWSGCPKubernetesTerraformDocker
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