StatefulSets¶

Description¶

A StatefulSet manages stateful applications that require stable network identities and persistent storage.

Unlike Deployments, StatefulSets provide:

stable pod names
ordered pod creation
persistent storage for each pod

StatefulSets are commonly used for databases and distributed systems.

Key Features¶

Feature	Description
Stable network identity	Pods have predictable names
Persistent storage	Each pod gets its own volume
Ordered deployment	Pods start sequentially

Example StatefulSet¶

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: database
spec:
  serviceName: database
  replicas: 3
  selector:
    matchLabels:
      app: db
  template:
    metadata:
      labels:
        app: db
    spec:
      containers:
      - name: postgres
        image: postgres

Common Commands¶

View StatefulSets:

kubectl get statefulsets

Describe StatefulSet:

kubectl describe statefulset database

Use Cases¶

StatefulSets are typically used for:

databases
distributed storage systems
message queues

Pods
Persistent Volumes