Stateful Set

Glossary page

A StatefulSet is responsible for managing the deployment and scaling of a set of Pods, while also ensuring the uniqueness and ordering of these Pods. Similar to a Deployment, a StatefulSet manages Pods based on an identical container spec. However, unlike a Deployment, each Pod in a StatefulSet maintains a persistent identity, meaning that these Pods are not interchangeable. If your workload requires storage volumes for persistence, you can use a StatefulSet as part of the solution. Although individual Pods in a StatefulSet are susceptible to failure, the persistent identifiers assigned to each Pod make it easier to match the new Pods to any existing volumes when replacing failed Pods.

https://kubernetes.io/docs/reference/glossary/?all=true external-link

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