The correct answer is StatefulSet.

A StatefulSet is the Kubernetes controller designed for workloads that need stable network identities and durable storage. It gives each pod a stable, unique network identity and preserves the association between a pod and its PersistentVolumeClaim so the same storage is reattached to the same pod across restarts and rescheduling. A StatefulSet also provides ordered and graceful scaling and updates which helps stateful services maintain consistency.

Deployment manages stateless ReplicaSets for scaling and rolling updates and it does not guarantee stable per pod network identities or persistent per pod volumes. That makes Deployment unsuitable for workloads that require durable per pod storage and stable identities.

PersistentVolumeClaim is a resource that requests storage and it is not a controller that manages pod lifecycle or identity. A PVC provides storage but it does not by itself ensure pods retain identity across restarts.

DaemonSet ensures a copy of a pod runs on each node or a selected set of nodes and it is used for node level daemons. A DaemonSet does not provide stable per pod network identities or per pod durable storage semantics required by stateful services.

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