StatefulSets
StatefulSets are a Kubernetes workload API object used to manage stateful applications, providing stable, unique network identifiers and persistent storage for pods. They ensure ordered, graceful deployment and scaling, and maintain the identity of each pod even after rescheduling. This is essential for applications like databases, message queues, and other services that require stable state and identity.
Developers should use StatefulSets when deploying stateful applications in Kubernetes that need persistent storage, stable network identities, or ordered deployment and scaling. For example, use StatefulSets for databases like MySQL or MongoDB, distributed systems like Kafka, or any service where pod identity and data persistence are critical for consistency and reliability.