What's a kubernetes StatefulSet?

3 min read

When we need to have a stateful application running on Kubernetes, we might need to use a StatefulSet. With a StatefulSet, we can manage stateful applications where each pod needs a stable, unique network identity and storage that persists across pod rescheduling. Unlike Deployments, which focus on maintaining a specified number of replicas, StatefulSets ensure each pod is given a unique ordinal index and retains the same identity throughout its lifecycle. If a pod is deleted or a node fails, the replacement pod will maintain the same identity and storage.

04/11/2024

Dynamically provisioned PersistentVolumes using StatefulSet

6 min read

The basic idea behind a StatefulSet is to be able to manage stateful workloads on Kubernetes, unlike Deployments, creating a unique identity for each Pod using a common spec.

With this in mind we might just copy the Pod's template from a Deployment to a StatefulSet object to make it stateful, but it's not always quite that simple.

21/02/2022