What is StatefulSet?
A Kubernetes workload for stateful applications requiring stable identity and persistent storage.
A StatefulSet manages stateful applications that need stable, unique network identifiers and persistent storage. Unlike Deployments where pods are interchangeable, StatefulSet pods have fixed names (pod-0, pod-1, pod-2), start in order, and each gets its own PVC. If pod-1 restarts, it gets the same name and reattaches to the same storage. StatefulSets are used for databases (PostgreSQL, MongoDB), message brokers (Kafka), and other apps where pod identity matters.
Deep Dive Guide
what is deployment vs statefulset kubernetes
Related Terms
More Kubernetes Terms
Admission Controller
A Kubernetes plugin that intercepts API requests before objects are persisted.
Auto Scaling
Automatically adjusting the number of compute resources based on demand.
ClusterIP
The default Kubernetes Service type that exposes a service on an internal cluster IP.
ConfigMap
A Kubernetes object for storing non-sensitive configuration data as key-value pairs.
Controller Manager
Kubernetes control plane component running control loops to maintain desired state.
CoreDNS
The default DNS server in Kubernetes clusters for service discovery.
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